HiveMQMetrics (HiveMQ SPI 3.4.2 API)

java.lang.Object
- com.hivemq.spi.metrics.HiveMQMetrics

```
public class HiveMQMetrics
extends Object
```
This class holds a constant HiveMQMetric for every metric which is provided by HiveMQ

Author:

Christoph Schäbel

Field Summary

Fields
Modifier and Type	Field and Description
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`BYTES_READ_CURRENT` represents a `Gauge`, which holds the current (last 5 seconds) amount of read bytes
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`BYTES_READ_TOTAL` represents a `Gauge`, which holds the total amount of read bytes
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`BYTES_WRITE_CURRENT` represents a `Gauge`, which holds the current (last 5 seconds) amount of written bytes
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`BYTES_WRITE_TOTAL` represents a `Gauge`, which holds total of written bytes
`static String`	`CALLBACK_EXECUTOR_PREFIX`
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`CLIENT_SESSIONS_CURRENT` represents a `Gauge`, which measures the current count of stored sessions
`static HiveMQMetric<com.codahale.metrics.Counter>`	`CLUSTER_NAME_REQUEST_RETRY_COUNT` represents a `Counter`, which measures the current count of retry that have been processed to request the name of other cluster nodes.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`CLUSTER_NODE_COUNT` represents a `Gauge`, which holds the current amount of nodes in cluster
`static HiveMQMetric<com.codahale.metrics.Timer>`	`CLUSTER_TOPOLOGY_CHANGE_TIMER` represents a `Timer`, which measures the time spent waiting for cluster topology changes
`static HiveMQMetric<com.codahale.metrics.Counter>`	`CONNECTIONS_CLOSED_COUNT` represents a `Counter`, which is increased every time a network connection is closed
`static HiveMQMetric<com.codahale.metrics.Counter>`	`CONNECTIONS_CLOSED_GRACEFUL_COUNT` represents a `Counter`, which is increased every time a network connection is closed gracefully.
`static HiveMQMetric<com.codahale.metrics.Counter>`	`CONNECTIONS_CLOSED_UNGRACEFUL_COUNT` represents a `Counter`, which is increased every time a network connection is closed ungraceful.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`CONNECTIONS_OVERALL_CURRENT` represents a `Gauge`, which holds the current total number of connections
`static HiveMQMetric<com.codahale.metrics.Histogram>`	`CONNECTIONS_OVERALL_MEAN` represents a `Histogram`, which holds the mean total number of connections
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`DIRECT_MEMORY_USED` represents a `Gauge`, which holds the currently used direct memory in bytes
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_BEFORE_PUBLISH_SEND_COUNT` represents a `Counter`, which counts PUBLISH messages that have been dropped, because an exception was thrown in a `BeforePublishSendCallback`
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_COUNT` represents a `Counter`, which counts every dropped PUBLISH messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_IN_FLIGHT_WINDOW_COUNT` represents a `Counter`, which counts PUBLISH messages that have been dropped, because the in-flight message queue for the client was full
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_INTERNAL_ERROR` represents a `Counter`, which counts PUBLISH messages that have been dropped, because of an internal error
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_NOT_CONNECTED_COUNT` represents a `Counter`, which counts the PUBLISH messages that have been dropped, because a clean session client disconnected before the message could be sent
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_NOT_WRITABLE_COUNT` represents a `Counter`, which counts PUBLISH messages that have been dropped, because the socket for the client was not writable (only QoS 0)
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_QUEUE_FULL_COUNT` represents a `Counter`, which counts PUBLISH messages that have been dropped, because the message queue for a disconnected persistent session client was full
`static HiveMQMetric<com.codahale.metrics.Counter>`	`DROPPED_MESSAGE_QUEUE_NOT_EMPTY` represents a `Counter`, which counts PUBLISH messages that have been dropped, because there QoS was 0 and the client session queue was not yet empty
`static HiveMQMetric<com.codahale.metrics.Meter>`	`DROPPED_MESSAGE_RATE` represents a `Meter`,which measures the current rate of dropped PUBLISH messages
`static String`	`EXCEPTION_PREFIX`
`static HiveMQMetric<com.codahale.metrics.Counter>`	`HALF_FULL_QUEUE_COUNT` represents a `Counter`, which counts the amount of clients with a message queue, that is at least half-full.
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_CONNECT_COUNT` represents a `Counter`, which counts every incoming MQTT CONNECT messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_CONNECT_RATE` represents a `Meter`,which measures the current rate of incoming MQTT CONNECT messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_DISCONNECT_COUNT` represents a `Counter`, which counts every incoming MQTT DISCONNECT messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_DISCONNECT_RATE` represents a `Meter`,which measures the current rate of incoming MQTT DISCONNECT messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_MESSAGE_COUNT` represents a `Counter`, which counts every incoming MQTT message
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_MESSAGE_RATE` represents a `Meter`,which measures the current rate of incoming MQTT messages
`static HiveMQMetric<com.codahale.metrics.Histogram>`	`INCOMING_MESSAGE_SIZE_MEAN` represents a `Histogram`, which measures the distribution of incoming MQTT message size (payload without fixed header)
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_PINGREQ_COUNT` represents a `Counter`, which counts every incoming MQTT PINGREQ messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_PINGREQ_RATE` represents a `Meter`,which measures the current rate of incoming MQTT PINGREQ messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_PUBACK_COUNT` represents a `Counter`, which counts every incoming MQTT PUBACK messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_PUBACK_RATE` represents a `Meter`,which measures the current rate of incoming MQTT PUBACK messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_PUBCOMP_COUNT` represents a `Counter`, which counts every incoming MQTT PUBCOMP messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_PUBCOMP_RATE` represents a `Meter`,which measures the current rate of incoming MQTT PUBCOMP messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_PUBLISH_COUNT` represents a `Counter`, which counts every incoming MQTT PUBLISH messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_PUBLISH_RATE` represents a `Meter`,which measures the current rate of incoming MQTT PUBLISH messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_PUBLISH_RETAINED_COUNT` represents a `Counter`, which counts every incoming MQTT PUBLISH messages with the retained flag set
`static HiveMQMetric<com.codahale.metrics.Histogram>`	`INCOMING_PUBLISH_SIZE_MEAN` represents a `Histogram`, which measures the distribution of incoming MQTT message size (payload without fixed header)
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_PUBREC_COUNT` represents a `Counter`, which counts every incoming MQTT PUBREC messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_PUBREC_RATE` represents a `Meter`,which measures the current rate of incoming MQTT PUBREC messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_PUBREL_COUNT` represents a `Counter`, which counts every incoming MQTT PUBREL messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_PUBREL_RATE` represents a `Meter`,which measures the current rate of incoming MQTT PUBREL messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_SUBSCRIBE_COUNT` represents a `Counter`, which counts every incoming MQTT SUBSCRIBE messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_SUBSCRIBE_RATE` represents a `Meter`,which measures the current rate of incoming MQTT SUBSCRIBE messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`INCOMING_UNSUBSCRIBE_COUNT` represents a `Counter`, which counts every incoming MQTT UNSUBSCRIBE messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`INCOMING_UNSUBSCRIBE_RATE` represents a `Meter`,which measures the current rate of incoming MQTT UNSUBSCRIBE messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`KEEP_ALIVE_DISCONNECT_COUNT` represents a `Counter`, which measures the total count of clients that have been disconnected, because they did not send a message within their keep alive interval `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_CONNACK_COUNT` represents a `Counter`, which counts every outgoing MQTT CONNACK messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_CONNACK_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT CONNACK messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_MESSAGE_COUNT` represents a `Counter`, which counts every outgoing MQTT message
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_MESSAGE_RATE` represents a `Meter`,which measures the current rate of outgoing MQTT messages
`static HiveMQMetric<com.codahale.metrics.Histogram>`	`OUTGOING_MESSAGE_SIZE_MEAN` represents a `Histogram`, which measures the distribution of incoming MQTT message size (payload without fixed header)
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_PINGRESP_COUNT` represents a `Counter`, which counts every outgoing MQTT PINGRESP messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_PINGRESP_RATE` represents a `Meter`,which measures the current rate of outgoing MQTT PINGRESP messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_PUBACK_COUNT` represents a `Counter`, which counts every outgoing MQTT PUBACK messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_PUBACK_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT PUBACK messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_PUBCOMP_COUNT` represents a `Counter`, which counts every outgoing MQTT PUBCOMP messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_PUBCOMP_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT PUBCOMP messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_PUBLISH_COUNT` represents a `Counter`, which counts every outgoing MQTT PUBLISH messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_PUBLISH_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT PUBLISH messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_PUBLISH_RETAINED_COUNT` represents a `Counter`, which counts every outgoing MQTT PUBLISH messages with the retained flag set
`static HiveMQMetric<com.codahale.metrics.Histogram>`	`OUTGOING_PUBLISH_SIZE_MEAN` represents a `Histogram`, which measures the distribution of incoming MQTT message size (payload without fixed header)
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_PUBREC_COUNT` represents a `Counter`, which counts every outgoing MQTT PUBREC messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_PUBREC_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT PUBREC messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_PUBREL_COUNT` represents a `Counter`, which counts every outgoing MQTT PUBREL messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_PUBREL_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT PUBREL messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_SUBACK_COUNT` represents a `Counter`, which counts every outgoing MQTT SUBACK messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_SUBACK_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT SUBACK messages
`static HiveMQMetric<com.codahale.metrics.Counter>`	`OUTGOING_UNSUBACK_COUNT` represents a `Counter`, which counts every outgoing MQTT UNSUBACK messages
`static HiveMQMetric<com.codahale.metrics.Meter>`	`OUTGOING_UNSUBACK_RATE` represents a `Meter`, which measures the current rate of outgoing MQTT UNSUBACK messages
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`OVERLOAD_PROTECTION_CLIENTS_AVERAGE_CREDITS` represents a `Gauge`, which holds the average amount of available credits between all clients.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`OVERLOAD_PROTECTION_CLIENTS_BACKPRESSURE_ACTIVE` represents a `Gauge`, which holds the current amount of clients for which backpressure is applied by overload protection.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`OVERLOAD_PROTECTION_CLIENTS_USING_CREDITS` represents a `Gauge`, which holds the current amount of clients having less than the full amount of credits.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`OVERLOAD_PROTECTION_CREDITS_PER_TICK` represents a `Gauge`, which holds the current amount of credits a client receives per tick.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`PAYLOAD_PERSISTENCE_ENTRIES` represents a `Gauge`, which holds the current amount of payloads stored in the payload persistence.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`PAYLOAD_PERSISTENCE_REMOVABLE_ENTRIES` represents a `Gauge`, which holds the current amount of payloads stored in the payload persistence, that can be removed by the cleanup.
`static HiveMQMetric<com.codahale.metrics.Counter>`	`PERSISTENT_SESSIONS_ACTIVE` represents a `Counter`, which measures the current count of active persistent sessions
`static String`	`PLUGIN_EXECUTOR_PREFIX`
`static HiveMQMetric<com.codahale.metrics.Meter>`	`PLUGIN_EXECUTOR_SERVICE_COMPLETED` represents a `Meter`, which measures the current count of completed jobs to the `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_EXECUTOR_SERVICE_DURATION` represents a `Timer`, which measures the duration of time spent on submitted jobs to the `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Counter>`	`PLUGIN_EXECUTOR_SERVICE_RUNNING` represents a `Meter`, which measures the current count of running jobs to the `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Meter>`	`PLUGIN_EXECUTOR_SERVICE_SCHEDULED_ONCE` represents a `Meter`, which measures the current rate of scheduled jobs in the `PluginExecutorService` that run once
`static HiveMQMetric<com.codahale.metrics.Counter>`	`PLUGIN_EXECUTOR_SERVICE_SCHEDULED_OVERRUN` represents a `Meter`, which measures the current count of jobs to the `PluginExecutorService` that are overrun which means that the job lasted so long that it interfered with the next scheduled job
`static HiveMQMetric<com.codahale.metrics.Histogram>`	`PLUGIN_EXECUTOR_SERVICE_SCHEDULED_PERCENT_OF_PERIOD` represents a `Meter`, which Measures how much percent of the scheduled period the `PluginExecutorService` jobs lasted
`static HiveMQMetric<com.codahale.metrics.Meter>`	`PLUGIN_EXECUTOR_SERVICE_SCHEDULED_REPETITIVELY` represents a `Meter`, which measures the current rate of scheduled jobs in the `PluginExecutorService` that run repetitively
`static HiveMQMetric<com.codahale.metrics.Meter>`	`PLUGIN_EXECUTOR_SERVICE_SUMBITTED` represents a `Meter`, which measures the current rate of submitted jobs to the `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Counter>`	`PLUGIN_RATE_LIMIT_EXCEEDED_COUNT` represents a `Counter`, which count the amount of times that the plugin service rate limit was exceeded `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_AFTER_LOGIN_FAILED` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `AfterLoginCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_AFTER_LOGIN_SUCCESS` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `AfterLoginCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_AUTHENTICATION` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnAuthenticationCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_AUTHORIZATION` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnAuthorizationCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_CONNACK_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnConnackSend` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_CONNECT` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnConnectCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_DISCONNECT` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnDisconnectCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PERMISSIONS_DISCONNECT_PUBLISH` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnInsufficientPermissionDisconnect`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PERMISSIONS_DISCONNECT_SUBSCRIBE` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnInsufficientPermissionDisconnect`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PING` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPingCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBACK_RECEIVED` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubackReceived` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBACK_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubackSend` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBCOMP_RECEIVED` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubcompReceived` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBCOMP_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubcompSend` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBLISH_RECEIVED` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPublishReceivedCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBLISH_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPublishSend`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBREC_RECEIVED` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubrecReceived` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBREC_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubrecSend` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBREL_RECEIVED` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubrelReceived` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_PUBREL_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnPubrelSend` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_RESTRICTIONS` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `RestrictionsAfterLoginCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_SESSION_READY` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnSessionReadyCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_SUBACK_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnSubackSend` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_SUBSCRIBE` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnSubscribeCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_TOPIC_SUBSCRIPTION` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnTopicSubscriptionCallback` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_UNSUBACK_SEND` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnUnsubackSend` callback
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_UNSUBSCRIBE` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `OnUnsubscribeCallback`
`static HiveMQMetric<com.codahale.metrics.Timer>`	`PLUGIN_TIMER_WEBUI_AUTHENTICATION` represents a `Timer`, which measures the mean execution time (in nanoseconds) of the `WebUIAuthenticationCallback`
`static HiveMQMetric<com.codahale.metrics.Counter>`	`POSSIBLY_STALE_SUBSCRIPTIONS` represents a `Counter`, which counts the current amount of clients subscriptions that may be removable by the topic tree cleanup.
`static HiveMQMetric<com.codahale.metrics.Meter>`	`PUBLISH_QUEUE_RATE` represents a `Meter`, which measures the rate of messages put into the publish queue
`static HiveMQMetric<com.codahale.metrics.Counter>`	`PUBLISH_QUEUE_SIZE` represents a `Counter`, which measures the current count of messages in the publish queue `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Meter>`	`PUBLISH_RESENT` represents a `Meter`, which measures the rate of PUBLISH messages that are resent, because the broker did not receive a PUBACK message in time.
`static HiveMQMetric<com.codahale.metrics.Meter>`	`PUBREL_RESENT` represents a `Meter`, which measures the rate of PUBREL messages that are resent, because the broker did not receive a PUBCOMP message in time.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`RETAINED_MESSAGES_CURRENT` represents a `Gauge`, which holds the current amount of retained messages
`static HiveMQMetric<com.codahale.metrics.Histogram>`	`RETAINED_MESSAGES_MEAN` represents a `Histogram`, which holds metrics about the mean payload-size of retained messages in bytes
`static HiveMQMetric<com.codahale.metrics.Meter>`	`RETAINED_MESSAGES_RATE` represents a `Histogram`, which holds the current rate of retained messages
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SESSIONS_PERSISTENT_QUEUE_MESSAGE_COUNT` represents a `Gauge`, which holds the current number of queued messages in persistent sessions
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_ATTRIBUTE_TASKS` represents a `Gauge`, which holds the current amount of disk I/O tasks that are enqueued by the attribute persistence.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_ATTRIBUTE_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of attribute disk I/O tasks
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_CLIENT_GROUP_TASKS` represents a `Gauge`, which holds the current amount of tasks that are enqueued by the client group persistence.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_CLIENT_GROUP_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of client group tasks
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_CLIENT_SESSION_TASKS` represents a `Gauge`, which holds the current amount of disk I/O tasks that are enqueued by the client session persistence.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_CLIENT_SESSION_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of client session disk I/O tasks
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_NONEMPTY_QUEUES` represents a `Gauge`, which holds the current amount of single writer task queues that are not empty.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_OUTGOING_MESSAGE_FLOW_TASKS` represents a `Gauge`, which holds the current amount of disk I/O tasks that are enqueued by the outgoing message flow persistence.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_OUTGOING_MESSAGE_FLOW_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of outgoing message flow disk I/O tasks
`static String`	`SINGLE_WRITER_PREFIX` Deprecated.
`static HiveMQMetric<com.codahale.metrics.Counter>`	`SINGLE_WRITER_QUEUE_MISSES` represents a `Counter`, which measures the current count of loops that all single writer threads have done without executing a task `PluginExecutorService`
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_QUEUED_MESSAGES_TASKS` represents a `Gauge`, which holds the current amount of disk I/O tasks that are enqueued by the queued messages persistence.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_QUEUED_MESSAGES_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of queued messages disk I/O tasks
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_REQUEST_EVENT_BUS_TASKS` represents a `Gauge`, which holds the current amount of tasks that are enqueued by the request event bus.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_REQUEST_EVENT_BUS_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of request event bus tasks
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_RETAINED_MESSAGE_TASKS` represents a `Gauge`, which holds the current amount of disk I/O tasks that are enqueued by the retained message persistence.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_RETAINED_MESSAGE_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of retained message disk I/O tasks
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_RUNNING_THREADS` represents a `Gauge`, which holds the current amount of threads that are executing disk I/O tasks.
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_SUBSCRIPTION_TASKS` represents a `Gauge`, which holds the current amount of disk I/O tasks that are enqueued by the subscription persistence.
`static HiveMQMetric<com.codahale.metrics.Timer>`	`SINGLE_WRITER_SUBSCRIPTION_TIMER` represents a `Timer`, which measures the mean execution time (in nanoseconds) of subscription disk I/O tasks
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SINGLE_WRITER_TOTAL_TASKS` represents a `Gauge`, which holds the current amount of disk I/O tasks that are enqueued by all persistences.
`static HiveMQMetric<com.codahale.metrics.Counter>`	`SUBSCRIPTIONS_CURRENT` represents a `Counter`, which measures the current count of subscriptions
`static HiveMQMetric<com.codahale.metrics.Gauge<Number>>`	`SUPERVISION_OVERLOAD_PROTECTION_LEVEL` represents a `Gauge`, which holds the current level of supervision overload protection
`static HiveMQMetric<com.codahale.metrics.Timer>`	`TOMBSTONE_CLEAN_UP_JOB_TIMER` represents a `Timer`, which measures the execution time of the tombstone cleanup jobs
`static HiveMQMetric<com.codahale.metrics.Meter>`	`TOTAL_EXCEPTION_RATE` represents a `Meter`, which measures the rate of unhandled Exceptions
`static String`	`WEBINTERFACE_EXECUTOR_PREFIX`

Constructor Summary

Constructors
Constructor and Description

HiveMQMetrics()

Constructors
Constructor and Description
`HiveMQMetrics()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - PLUGIN_EXECUTOR_PREFIX
```
public static final String PLUGIN_EXECUTOR_PREFIX
```
    See Also:
    Constant Field Values
  - CALLBACK_EXECUTOR_PREFIX
```
public static final String CALLBACK_EXECUTOR_PREFIX
```
    See Also:
    Constant Field Values
  - EXCEPTION_PREFIX
```
public static final String EXCEPTION_PREFIX
```
    See Also:
    Constant Field Values
  - WEBINTERFACE_EXECUTOR_PREFIX
```
public static final String WEBINTERFACE_EXECUTOR_PREFIX
```
    See Also:
    Constant Field Values
  - SINGLE_WRITER_PREFIX
```
@Deprecated
public static final String SINGLE_WRITER_PREFIX
```
    Deprecated.
    
    See Also:
    Constant Field Values
  - INCOMING_MESSAGE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_MESSAGE_COUNT
```
    represents a Counter, which counts every incoming MQTT message
    
    Since:
    
    3.0
  - OUTGOING_MESSAGE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_MESSAGE_COUNT
```
    represents a Counter, which counts every outgoing MQTT message
    
    Since:
    
    3.0
  - INCOMING_MESSAGE_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_MESSAGE_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT messages
    
    Since:
    
    3.0
  - OUTGOING_MESSAGE_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_MESSAGE_RATE
```
    represents a Meter,which measures the current rate of outgoing MQTT messages
    
    Since:
    
    3.0
  - INCOMING_MESSAGE_SIZE_MEAN
```
public static final HiveMQMetric<com.codahale.metrics.Histogram> INCOMING_MESSAGE_SIZE_MEAN
```
    represents a Histogram, which measures the distribution of incoming MQTT message size (payload without fixed header)
    
    Since:
    
    3.0
  - OUTGOING_MESSAGE_SIZE_MEAN
```
public static final HiveMQMetric<com.codahale.metrics.Histogram> OUTGOING_MESSAGE_SIZE_MEAN
```
    represents a Histogram, which measures the distribution of incoming MQTT message size (payload without fixed header)
    
    Since:
    
    3.0
  - INCOMING_CONNECT_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_CONNECT_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT CONNECT messages
    
    Since:
    
    3.0
  - INCOMING_CONNECT_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_CONNECT_COUNT
```
    represents a Counter, which counts every incoming MQTT CONNECT messages
    
    Since:
    
    3.0
  - OUTGOING_CONNACK_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_CONNACK_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT CONNACK messages
    
    Since:
    
    3.0
  - OUTGOING_CONNACK_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_CONNACK_COUNT
```
    represents a Counter, which counts every outgoing MQTT CONNACK messages
    
    Since:
    
    3.0
  - INCOMING_PUBLISH_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_PUBLISH_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT PUBLISH messages
    
    Since:
    
    3.0
  - INCOMING_PUBLISH_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_PUBLISH_COUNT
```
    represents a Counter, which counts every incoming MQTT PUBLISH messages
    
    Since:
    
    3.0
  - INCOMING_PUBLISH_RETAINED_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_PUBLISH_RETAINED_COUNT
```
    represents a Counter, which counts every incoming MQTT PUBLISH messages with the retained flag set
    
    Since:
    
    3.4
  - INCOMING_PUBLISH_SIZE_MEAN
```
public static final HiveMQMetric<com.codahale.metrics.Histogram> INCOMING_PUBLISH_SIZE_MEAN
```
    represents a Histogram, which measures the distribution of incoming MQTT message size (payload without fixed header)
    
    Since:
    
    3.0
  - OUTGOING_PUBLISH_SIZE_MEAN
```
public static final HiveMQMetric<com.codahale.metrics.Histogram> OUTGOING_PUBLISH_SIZE_MEAN
```
    represents a Histogram, which measures the distribution of incoming MQTT message size (payload without fixed header)
    
    Since:
    
    3.0
  - OUTGOING_PUBLISH_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_PUBLISH_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT PUBLISH messages
    
    Since:
    
    3.0
  - OUTGOING_PUBLISH_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_PUBLISH_COUNT
```
    represents a Counter, which counts every outgoing MQTT PUBLISH messages
    
    Since:
    
    3.0
  - OUTGOING_PUBLISH_RETAINED_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_PUBLISH_RETAINED_COUNT
```
    represents a Counter, which counts every outgoing MQTT PUBLISH messages with the retained flag set
    
    Since:
    
    3.4
  - INCOMING_DISCONNECT_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_DISCONNECT_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT DISCONNECT messages
    
    Since:
    
    3.0
  - INCOMING_DISCONNECT_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_DISCONNECT_COUNT
```
    represents a Counter, which counts every incoming MQTT DISCONNECT messages
    
    Since:
    
    3.0
  - INCOMING_PINGREQ_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_PINGREQ_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT PINGREQ messages
    
    Since:
    
    3.0
  - INCOMING_PINGREQ_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_PINGREQ_COUNT
```
    represents a Counter, which counts every incoming MQTT PINGREQ messages
    
    Since:
    
    3.0
  - OUTGOING_PINGRESP_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_PINGRESP_RATE
```
    represents a Meter,which measures the current rate of outgoing MQTT PINGRESP messages
    
    Since:
    
    3.0
  - OUTGOING_PINGRESP_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_PINGRESP_COUNT
```
    represents a Counter, which counts every outgoing MQTT PINGRESP messages
    
    Since:
    
    3.0
  - INCOMING_PUBACK_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_PUBACK_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT PUBACK messages
    
    Since:
    
    3.0
  - INCOMING_PUBACK_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_PUBACK_COUNT
```
    represents a Counter, which counts every incoming MQTT PUBACK messages
    
    Since:
    
    3.0
  - OUTGOING_PUBACK_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_PUBACK_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT PUBACK messages
    
    Since:
    
    3.0
  - OUTGOING_PUBACK_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_PUBACK_COUNT
```
    represents a Counter, which counts every outgoing MQTT PUBACK messages
    
    Since:
    
    3.0
  - INCOMING_PUBCOMP_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_PUBCOMP_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT PUBCOMP messages
    
    Since:
    
    3.0
  - INCOMING_PUBCOMP_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_PUBCOMP_COUNT
```
    represents a Counter, which counts every incoming MQTT PUBCOMP messages
    
    Since:
    
    3.0
  - OUTGOING_PUBCOMP_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_PUBCOMP_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT PUBCOMP messages
    
    Since:
    
    3.0
  - OUTGOING_PUBCOMP_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_PUBCOMP_COUNT
```
    represents a Counter, which counts every outgoing MQTT PUBCOMP messages
    
    Since:
    
    3.0
  - INCOMING_PUBREC_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_PUBREC_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT PUBREC messages
    
    Since:
    
    3.0
  - INCOMING_PUBREC_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_PUBREC_COUNT
```
    represents a Counter, which counts every incoming MQTT PUBREC messages
    
    Since:
    
    3.0
  - OUTGOING_PUBREC_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_PUBREC_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT PUBREC messages
    
    Since:
    
    3.0
  - OUTGOING_PUBREC_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_PUBREC_COUNT
```
    represents a Counter, which counts every outgoing MQTT PUBREC messages
    
    Since:
    
    3.0
  - INCOMING_PUBREL_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_PUBREL_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT PUBREL messages
    
    Since:
    
    3.0
  - INCOMING_PUBREL_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_PUBREL_COUNT
```
    represents a Counter, which counts every incoming MQTT PUBREL messages
    
    Since:
    
    3.0
  - OUTGOING_PUBREL_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_PUBREL_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT PUBREL messages
    
    Since:
    
    3.0
  - OUTGOING_PUBREL_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_PUBREL_COUNT
```
    represents a Counter, which counts every outgoing MQTT PUBREL messages
    
    Since:
    
    3.0
  - INCOMING_SUBSCRIBE_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_SUBSCRIBE_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT SUBSCRIBE messages
    
    Since:
    
    3.0
  - INCOMING_SUBSCRIBE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_SUBSCRIBE_COUNT
```
    represents a Counter, which counts every incoming MQTT SUBSCRIBE messages
    
    Since:
    
    3.0
  - OUTGOING_SUBACK_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_SUBACK_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT SUBACK messages
    
    Since:
    
    3.0
  - OUTGOING_SUBACK_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_SUBACK_COUNT
```
    represents a Counter, which counts every outgoing MQTT SUBACK messages
    
    Since:
    
    3.0
  - INCOMING_UNSUBSCRIBE_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> INCOMING_UNSUBSCRIBE_RATE
```
    represents a Meter,which measures the current rate of incoming MQTT UNSUBSCRIBE messages
    
    Since:
    
    3.0
  - INCOMING_UNSUBSCRIBE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> INCOMING_UNSUBSCRIBE_COUNT
```
    represents a Counter, which counts every incoming MQTT UNSUBSCRIBE messages
    
    Since:
    
    3.0
  - HALF_FULL_QUEUE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> HALF_FULL_QUEUE_COUNT
```
    represents a Counter, which counts the amount of clients with a message queue, that is at least half-full.
    
    Since:
    
    3.0
  - DROPPED_MESSAGE_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> DROPPED_MESSAGE_RATE
```
    represents a Meter,which measures the current rate of dropped PUBLISH messages
    
    Since:
    
    3.0
  - DROPPED_MESSAGE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_COUNT
```
    represents a Counter, which counts every dropped PUBLISH messages
    
    Since:
    
    3.0
  - DROPPED_MESSAGE_NOT_CONNECTED_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_NOT_CONNECTED_COUNT
```
    represents a Counter, which counts the PUBLISH messages that have been dropped, because a clean session client disconnected before the message could be sent
    
    Since:
    
    3.3
  - DROPPED_MESSAGE_QUEUE_FULL_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_QUEUE_FULL_COUNT
```
    represents a Counter, which counts PUBLISH messages that have been dropped, because the message queue for a disconnected persistent session client was full
    
    Since:
    
    3.3
  - DROPPED_MESSAGE_IN_FLIGHT_WINDOW_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_IN_FLIGHT_WINDOW_COUNT
```
    represents a Counter, which counts PUBLISH messages that have been dropped, because the in-flight message queue for the client was full
    
    Since:
    
    3.3
  - DROPPED_MESSAGE_NOT_WRITABLE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_NOT_WRITABLE_COUNT
```
    represents a Counter, which counts PUBLISH messages that have been dropped, because the socket for the client was not writable (only QoS 0)
    
    Since:
    
    3.3
  - DROPPED_MESSAGE_QUEUE_NOT_EMPTY
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_QUEUE_NOT_EMPTY
```
    represents a Counter, which counts PUBLISH messages that have been dropped, because there QoS was 0 and the client session queue was not yet empty
    
    Since:
    
    3.3
  - DROPPED_MESSAGE_INTERNAL_ERROR
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_INTERNAL_ERROR
```
    represents a Counter, which counts PUBLISH messages that have been dropped, because of an internal error
    
    Since:
    
    3.3
  - DROPPED_MESSAGE_BEFORE_PUBLISH_SEND_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> DROPPED_MESSAGE_BEFORE_PUBLISH_SEND_COUNT
```
    represents a Counter, which counts PUBLISH messages that have been dropped, because an exception was thrown in a BeforePublishSendCallback
    
    Since:
    
    3.3
  - OUTGOING_UNSUBACK_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> OUTGOING_UNSUBACK_RATE
```
    represents a Meter, which measures the current rate of outgoing MQTT UNSUBACK messages
    
    Since:
    
    3.0
  - RETAINED_MESSAGES_CURRENT
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> RETAINED_MESSAGES_CURRENT
```
    represents a Gauge, which holds the current amount of retained messages
    
    Since:
    
    3.0
  - RETAINED_MESSAGES_MEAN
```
public static final HiveMQMetric<com.codahale.metrics.Histogram> RETAINED_MESSAGES_MEAN
```
    represents a Histogram, which holds metrics about the mean payload-size of retained messages in bytes
    
    Since:
    
    3.0
  - RETAINED_MESSAGES_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> RETAINED_MESSAGES_RATE
```
    represents a Histogram, which holds the current rate of retained messages
    
    Since:
    
    3.1
  - OUTGOING_UNSUBACK_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> OUTGOING_UNSUBACK_COUNT
```
    represents a Counter, which counts every outgoing MQTT UNSUBACK messages
    
    Since:
    
    3.0
  - BYTES_READ_CURRENT
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> BYTES_READ_CURRENT
```
    represents a Gauge, which holds the current (last 5 seconds) amount of read bytes
    
    Since:
    
    3.0
  - BYTES_WRITE_CURRENT
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> BYTES_WRITE_CURRENT
```
    represents a Gauge, which holds the current (last 5 seconds) amount of written bytes
    
    Since:
    
    3.0
  - BYTES_READ_TOTAL
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> BYTES_READ_TOTAL
```
    represents a Gauge, which holds the total amount of read bytes
    
    Since:
    
    3.0
  - BYTES_WRITE_TOTAL
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> BYTES_WRITE_TOTAL
```
    represents a Gauge, which holds total of written bytes
    
    Since:
    
    3.0
  - CONNECTIONS_OVERALL_CURRENT
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> CONNECTIONS_OVERALL_CURRENT
```
    represents a Gauge, which holds the current total number of connections
    
    Since:
    
    3.0
  - CONNECTIONS_OVERALL_MEAN
```
public static final HiveMQMetric<com.codahale.metrics.Histogram> CONNECTIONS_OVERALL_MEAN
```
    represents a Histogram, which holds the mean total number of connections
    
    Since:
    
    3.0
  - CONNECTIONS_CLOSED_GRACEFUL_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> CONNECTIONS_CLOSED_GRACEFUL_COUNT
```
    represents a Counter, which is increased every time a network connection is closed gracefully. Graceful means the client sent a DISCONNECT message before closing the TCP connection
    
    Since:
    
    3.4
  - CONNECTIONS_CLOSED_UNGRACEFUL_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> CONNECTIONS_CLOSED_UNGRACEFUL_COUNT
```
    represents a Counter, which is increased every time a network connection is closed ungraceful. Ungraceful means the client did NOT send a DISCONNECT message before closing the TCP connection
    
    Since:
    
    3.4
  - CONNECTIONS_CLOSED_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> CONNECTIONS_CLOSED_COUNT
```
    represents a Counter, which is increased every time a network connection is closed
    
    Since:
    
    3.4
  - SUBSCRIPTIONS_CURRENT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> SUBSCRIPTIONS_CURRENT
```
    represents a Counter, which measures the current count of subscriptions
    
    Since:
    
    3.0
  - PERSISTENT_SESSIONS_ACTIVE
```
public static final HiveMQMetric<com.codahale.metrics.Counter> PERSISTENT_SESSIONS_ACTIVE
```
    represents a Counter, which measures the current count of active persistent sessions
    
    Since:
    
    3.0
  - CLIENT_SESSIONS_CURRENT
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> CLIENT_SESSIONS_CURRENT
```
    represents a Gauge, which measures the current count of stored sessions
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_SUMBITTED
```
public static final HiveMQMetric<com.codahale.metrics.Meter> PLUGIN_EXECUTOR_SERVICE_SUMBITTED
```
    represents a Meter, which measures the current rate of submitted jobs to the PluginExecutorService
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_RUNNING
```
public static final HiveMQMetric<com.codahale.metrics.Counter> PLUGIN_EXECUTOR_SERVICE_RUNNING
```
    represents a Meter, which measures the current count of running jobs to the PluginExecutorService
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_COMPLETED
```
public static final HiveMQMetric<com.codahale.metrics.Meter> PLUGIN_EXECUTOR_SERVICE_COMPLETED
```
    represents a Meter, which measures the current count of completed jobs to the PluginExecutorService
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_DURATION
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_EXECUTOR_SERVICE_DURATION
```
    represents a Timer, which measures the duration of time spent on submitted jobs to the PluginExecutorService
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_SCHEDULED_ONCE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> PLUGIN_EXECUTOR_SERVICE_SCHEDULED_ONCE
```
    represents a Meter, which measures the current rate of scheduled jobs in the PluginExecutorService that run once
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_SCHEDULED_REPETITIVELY
```
public static final HiveMQMetric<com.codahale.metrics.Meter> PLUGIN_EXECUTOR_SERVICE_SCHEDULED_REPETITIVELY
```
    represents a Meter, which measures the current rate of scheduled jobs in the PluginExecutorService that run repetitively
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_SCHEDULED_OVERRUN
```
public static final HiveMQMetric<com.codahale.metrics.Counter> PLUGIN_EXECUTOR_SERVICE_SCHEDULED_OVERRUN
```
    represents a Meter, which measures the current count of jobs to the PluginExecutorService that are overrun which means that the job lasted so long that it interfered with the next scheduled job
    
    Since:
    
    3.0
  - PLUGIN_EXECUTOR_SERVICE_SCHEDULED_PERCENT_OF_PERIOD
```
public static final HiveMQMetric<com.codahale.metrics.Histogram> PLUGIN_EXECUTOR_SERVICE_SCHEDULED_PERCENT_OF_PERIOD
```
    represents a Meter, which Measures how much percent of the scheduled period the PluginExecutorService jobs lasted
    
    Since:
    
    3.0
  - PLUGIN_TIMER_AFTER_LOGIN_SUCCESS
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_AFTER_LOGIN_SUCCESS
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the AfterLoginCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_AFTER_LOGIN_FAILED
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_AFTER_LOGIN_FAILED
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the AfterLoginCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_AUTHENTICATION
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_AUTHENTICATION
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnAuthenticationCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_RESTRICTIONS
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_RESTRICTIONS
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the RestrictionsAfterLoginCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_AUTHORIZATION
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_AUTHORIZATION
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnAuthorizationCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PERMISSIONS_DISCONNECT_PUBLISH
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PERMISSIONS_DISCONNECT_PUBLISH
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnInsufficientPermissionDisconnect
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PERMISSIONS_DISCONNECT_SUBSCRIBE
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PERMISSIONS_DISCONNECT_SUBSCRIBE
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnInsufficientPermissionDisconnect
    
    Since:
    
    3.0
  - PLUGIN_TIMER_CONNECT
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_CONNECT
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnConnectCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_DISCONNECT
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_DISCONNECT
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnDisconnectCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBLISH_RECEIVED
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBLISH_RECEIVED
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPublishReceivedCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBLISH_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBLISH_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPublishSend
    
    Since:
    
    3.0
  - PLUGIN_TIMER_SUBSCRIBE
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_SUBSCRIBE
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnSubscribeCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBACK_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBACK_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubackSend callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBACK_RECEIVED
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBACK_RECEIVED
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubackReceived callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_SUBACK_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_SUBACK_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnSubackSend callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_UNSUBACK_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_UNSUBACK_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnUnsubackSend callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBCOMP_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBCOMP_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubcompSend callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBCOMP_RECEIVED
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBCOMP_RECEIVED
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubcompReceived callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBREC_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBREC_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubrecSend callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBREC_RECEIVED
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBREC_RECEIVED
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubrecReceived callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBREL_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBREL_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubrelSend callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PUBREL_RECEIVED
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PUBREL_RECEIVED
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPubrelReceived callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_TOPIC_SUBSCRIPTION
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_TOPIC_SUBSCRIPTION
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnTopicSubscriptionCallback callback
    
    Since:
    
    3.2
  - PLUGIN_TIMER_CONNACK_SEND
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_CONNACK_SEND
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnConnackSend callback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_UNSUBSCRIBE
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_UNSUBSCRIBE
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnUnsubscribeCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_PING
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_PING
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnPingCallback
    
    Since:
    
    3.0
  - PLUGIN_TIMER_SESSION_READY
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_SESSION_READY
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the OnSessionReadyCallback
    
    Since:
    
    3.3
  - PLUGIN_TIMER_WEBUI_AUTHENTICATION
```
public static final HiveMQMetric<com.codahale.metrics.Timer> PLUGIN_TIMER_WEBUI_AUTHENTICATION
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of the WebUIAuthenticationCallback
    
    Since:
    
    3.4.2
  - TOTAL_EXCEPTION_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> TOTAL_EXCEPTION_RATE
```
    represents a Meter, which measures the rate of unhandled Exceptions
    
    Since:
    
    3.0
  - PUBLISH_QUEUE_SIZE
```
public static final HiveMQMetric<com.codahale.metrics.Counter> PUBLISH_QUEUE_SIZE
```
    represents a Counter, which measures the current count of messages in the publish queue PluginExecutorService
    
    Since:
    
    3.0
  - PUBLISH_QUEUE_RATE
```
public static final HiveMQMetric<com.codahale.metrics.Meter> PUBLISH_QUEUE_RATE
```
    represents a Meter, which measures the rate of messages put into the publish queue
    
    Since:
    
    3.0
  - SINGLE_WRITER_RETAINED_MESSAGE_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_RETAINED_MESSAGE_TASKS
```
    represents a Gauge, which holds the current amount of disk I/O tasks that are enqueued by the retained message persistence.
    
    Since:
    
    3.2
  - SINGLE_WRITER_CLIENT_SESSION_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_CLIENT_SESSION_TASKS
```
    represents a Gauge, which holds the current amount of disk I/O tasks that are enqueued by the client session persistence.
    
    Since:
    
    3.2
  - SINGLE_WRITER_SUBSCRIPTION_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_SUBSCRIPTION_TASKS
```
    represents a Gauge, which holds the current amount of disk I/O tasks that are enqueued by the subscription persistence.
    
    Since:
    
    3.2
  - SINGLE_WRITER_QUEUED_MESSAGES_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_QUEUED_MESSAGES_TASKS
```
    represents a Gauge, which holds the current amount of disk I/O tasks that are enqueued by the queued messages persistence.
    
    Since:
    
    3.2
  - SINGLE_WRITER_OUTGOING_MESSAGE_FLOW_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_OUTGOING_MESSAGE_FLOW_TASKS
```
    represents a Gauge, which holds the current amount of disk I/O tasks that are enqueued by the outgoing message flow persistence.
    
    Since:
    
    3.2
  - SINGLE_WRITER_ATTRIBUTE_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_ATTRIBUTE_TASKS
```
    represents a Gauge, which holds the current amount of disk I/O tasks that are enqueued by the attribute persistence.
    
    Since:
    
    3.3
  - SINGLE_WRITER_REQUEST_EVENT_BUS_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_REQUEST_EVENT_BUS_TASKS
```
    represents a Gauge, which holds the current amount of tasks that are enqueued by the request event bus.
    
    Since:
    
    3.2
  - SINGLE_WRITER_CLIENT_GROUP_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_CLIENT_GROUP_TASKS
```
    represents a Gauge, which holds the current amount of tasks that are enqueued by the client group persistence.
    
    Since:
    
    3.3
  - SINGLE_WRITER_TOTAL_TASKS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_TOTAL_TASKS
```
    represents a Gauge, which holds the current amount of disk I/O tasks that are enqueued by all persistences.
    
    Since:
    
    3.2
  - SINGLE_WRITER_NONEMPTY_QUEUES
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_NONEMPTY_QUEUES
```
    represents a Gauge, which holds the current amount of single writer task queues that are not empty.
    
    Since:
    
    3.2
  - SINGLE_WRITER_RUNNING_THREADS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SINGLE_WRITER_RUNNING_THREADS
```
    represents a Gauge, which holds the current amount of threads that are executing disk I/O tasks.
    
    Since:
    
    3.2
  - SINGLE_WRITER_RETAINED_MESSAGE_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_RETAINED_MESSAGE_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of retained message disk I/O tasks
    
    Since:
    
    3.2
  - SINGLE_WRITER_CLIENT_SESSION_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_CLIENT_SESSION_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of client session disk I/O tasks
    
    Since:
    
    3.2
  - SINGLE_WRITER_SUBSCRIPTION_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_SUBSCRIPTION_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of subscription disk I/O tasks
    
    Since:
    
    3.2
  - SINGLE_WRITER_QUEUED_MESSAGES_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_QUEUED_MESSAGES_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of queued messages disk I/O tasks
    
    Since:
    
    3.2
  - SINGLE_WRITER_OUTGOING_MESSAGE_FLOW_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_OUTGOING_MESSAGE_FLOW_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of outgoing message flow disk I/O tasks
    
    Since:
    
    3.2
  - SINGLE_WRITER_ATTRIBUTE_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_ATTRIBUTE_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of attribute disk I/O tasks
    
    Since:
    
    3.3
  - SINGLE_WRITER_REQUEST_EVENT_BUS_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_REQUEST_EVENT_BUS_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of request event bus tasks
    
    Since:
    
    3.2
  - SINGLE_WRITER_CLIENT_GROUP_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> SINGLE_WRITER_CLIENT_GROUP_TIMER
```
    represents a Timer, which measures the mean execution time (in nanoseconds) of client group tasks
    
    Since:
    
    3.3
  - SINGLE_WRITER_QUEUE_MISSES
```
public static final HiveMQMetric<com.codahale.metrics.Counter> SINGLE_WRITER_QUEUE_MISSES
```
    represents a Counter, which measures the current count of loops that all single writer threads have done without executing a task PluginExecutorService
    
    Since:
    
    3.2
  - PAYLOAD_PERSISTENCE_ENTRIES
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> PAYLOAD_PERSISTENCE_ENTRIES
```
    represents a Gauge, which holds the current amount of payloads stored in the payload persistence.
    
    Since:
    
    3.3
  - PAYLOAD_PERSISTENCE_REMOVABLE_ENTRIES
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> PAYLOAD_PERSISTENCE_REMOVABLE_ENTRIES
```
    represents a Gauge, which holds the current amount of payloads stored in the payload persistence, that can be removed by the cleanup.
    
    Since:
    
    3.3
  - KEEP_ALIVE_DISCONNECT_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> KEEP_ALIVE_DISCONNECT_COUNT
```
    represents a Counter, which measures the total count of clients that have been disconnected, because they did not send a message within their keep alive interval PluginExecutorService
    
    Since:
    
    3.2
  - DIRECT_MEMORY_USED
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> DIRECT_MEMORY_USED
```
    represents a Gauge, which holds the currently used direct memory in bytes
    
    Since:
    
    3.2
  - PUBLISH_RESENT
```
public static final HiveMQMetric<com.codahale.metrics.Meter> PUBLISH_RESENT
```
    represents a Meter, which measures the rate of PUBLISH messages that are resent, because the broker did not receive a PUBACK message in time.
    
    Since:
    
    3.2
  - PUBREL_RESENT
```
public static final HiveMQMetric<com.codahale.metrics.Meter> PUBREL_RESENT
```
    represents a Meter, which measures the rate of PUBREL messages that are resent, because the broker did not receive a PUBCOMP message in time.
    
    Since:
    
    3.2
  - CLUSTER_TOPOLOGY_CHANGE_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> CLUSTER_TOPOLOGY_CHANGE_TIMER
```
    represents a Timer, which measures the time spent waiting for cluster topology changes
    
    Since:
    
    3.2
  - CLUSTER_NAME_REQUEST_RETRY_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> CLUSTER_NAME_REQUEST_RETRY_COUNT
```
    represents a Counter, which measures the current count of retry that have been processed to request the name of other cluster nodes.
    
    Since:
    
    3.3
  - TOMBSTONE_CLEAN_UP_JOB_TIMER
```
public static final HiveMQMetric<com.codahale.metrics.Timer> TOMBSTONE_CLEAN_UP_JOB_TIMER
```
    represents a Timer, which measures the execution time of the tombstone cleanup jobs
    
    Since:
    
    3.2
  - SESSIONS_PERSISTENT_QUEUE_MESSAGE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SESSIONS_PERSISTENT_QUEUE_MESSAGE_COUNT
```
    represents a Gauge, which holds the current number of queued messages in persistent sessions
    
    Since:
    
    3.3
  - CLUSTER_NODE_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> CLUSTER_NODE_COUNT
```
    represents a Gauge, which holds the current amount of nodes in cluster
    
    Since:
    
    3.3
  - PLUGIN_RATE_LIMIT_EXCEEDED_COUNT
```
public static final HiveMQMetric<com.codahale.metrics.Counter> PLUGIN_RATE_LIMIT_EXCEEDED_COUNT
```
    represents a Counter, which count the amount of times that the plugin service rate limit was exceeded PluginExecutorService
    
    Since:
    
    3.4
  - SUPERVISION_OVERLOAD_PROTECTION_LEVEL
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> SUPERVISION_OVERLOAD_PROTECTION_LEVEL
```
    represents a Gauge, which holds the current level of supervision overload protection
    
    Since:
    
    3.4
  - OVERLOAD_PROTECTION_CREDITS_PER_TICK
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> OVERLOAD_PROTECTION_CREDITS_PER_TICK
```
    represents a Gauge, which holds the current amount of credits a client receives per tick.
    
    Since:
    
    3.4
  - OVERLOAD_PROTECTION_CLIENTS_AVERAGE_CREDITS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> OVERLOAD_PROTECTION_CLIENTS_AVERAGE_CREDITS
```
    represents a Gauge, which holds the average amount of available credits between all clients.
    
    Since:
    
    3.4
  - OVERLOAD_PROTECTION_CLIENTS_USING_CREDITS
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> OVERLOAD_PROTECTION_CLIENTS_USING_CREDITS
```
    represents a Gauge, which holds the current amount of clients having less than the full amount of credits.
    
    Since:
    
    3.4
  - OVERLOAD_PROTECTION_CLIENTS_BACKPRESSURE_ACTIVE
```
public static final HiveMQMetric<com.codahale.metrics.Gauge<Number>> OVERLOAD_PROTECTION_CLIENTS_BACKPRESSURE_ACTIVE
```
    represents a Gauge, which holds the current amount of clients for which backpressure is applied by overload protection.
    
    Since:
    
    3.4
  - POSSIBLY_STALE_SUBSCRIPTIONS
```
public static final HiveMQMetric<com.codahale.metrics.Counter> POSSIBLY_STALE_SUBSCRIPTIONS
```
    represents a Counter, which counts the current amount of clients subscriptions that may be removable by the topic tree cleanup.
    
    Since:
    
    3.4
- Constructor Detail
  - HiveMQMetrics
```
public HiveMQMetrics()
```

Class HiveMQMetrics

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

PLUGIN_EXECUTOR_PREFIX

CALLBACK_EXECUTOR_PREFIX

EXCEPTION_PREFIX

WEBINTERFACE_EXECUTOR_PREFIX

SINGLE_WRITER_PREFIX

INCOMING_MESSAGE_COUNT

OUTGOING_MESSAGE_COUNT

INCOMING_MESSAGE_RATE

OUTGOING_MESSAGE_RATE

INCOMING_MESSAGE_SIZE_MEAN

OUTGOING_MESSAGE_SIZE_MEAN

INCOMING_CONNECT_RATE

INCOMING_CONNECT_COUNT

OUTGOING_CONNACK_RATE

OUTGOING_CONNACK_COUNT

INCOMING_PUBLISH_RATE

INCOMING_PUBLISH_COUNT

INCOMING_PUBLISH_RETAINED_COUNT

INCOMING_PUBLISH_SIZE_MEAN

OUTGOING_PUBLISH_SIZE_MEAN

OUTGOING_PUBLISH_RATE

OUTGOING_PUBLISH_COUNT

OUTGOING_PUBLISH_RETAINED_COUNT

INCOMING_DISCONNECT_RATE

INCOMING_DISCONNECT_COUNT

INCOMING_PINGREQ_RATE

INCOMING_PINGREQ_COUNT

OUTGOING_PINGRESP_RATE

OUTGOING_PINGRESP_COUNT

INCOMING_PUBACK_RATE

INCOMING_PUBACK_COUNT

OUTGOING_PUBACK_RATE

OUTGOING_PUBACK_COUNT

INCOMING_PUBCOMP_RATE

INCOMING_PUBCOMP_COUNT

OUTGOING_PUBCOMP_RATE

OUTGOING_PUBCOMP_COUNT

INCOMING_PUBREC_RATE

INCOMING_PUBREC_COUNT

OUTGOING_PUBREC_RATE

OUTGOING_PUBREC_COUNT

INCOMING_PUBREL_RATE

INCOMING_PUBREL_COUNT

OUTGOING_PUBREL_RATE

OUTGOING_PUBREL_COUNT

INCOMING_SUBSCRIBE_RATE

INCOMING_SUBSCRIBE_COUNT

OUTGOING_SUBACK_RATE

OUTGOING_SUBACK_COUNT

INCOMING_UNSUBSCRIBE_RATE

INCOMING_UNSUBSCRIBE_COUNT

HALF_FULL_QUEUE_COUNT

DROPPED_MESSAGE_RATE

DROPPED_MESSAGE_COUNT

DROPPED_MESSAGE_NOT_CONNECTED_COUNT

DROPPED_MESSAGE_QUEUE_FULL_COUNT

DROPPED_MESSAGE_IN_FLIGHT_WINDOW_COUNT

DROPPED_MESSAGE_NOT_WRITABLE_COUNT

DROPPED_MESSAGE_QUEUE_NOT_EMPTY

DROPPED_MESSAGE_INTERNAL_ERROR

DROPPED_MESSAGE_BEFORE_PUBLISH_SEND_COUNT

OUTGOING_UNSUBACK_RATE

RETAINED_MESSAGES_CURRENT

RETAINED_MESSAGES_MEAN

RETAINED_MESSAGES_RATE

OUTGOING_UNSUBACK_COUNT

BYTES_READ_CURRENT

BYTES_WRITE_CURRENT

BYTES_READ_TOTAL

BYTES_WRITE_TOTAL

CONNECTIONS_OVERALL_CURRENT

CONNECTIONS_OVERALL_MEAN

CONNECTIONS_CLOSED_GRACEFUL_COUNT

CONNECTIONS_CLOSED_UNGRACEFUL_COUNT