AeronCounters (Aeron Message Transport)

java.lang.Object
- io.aeron.AeronCounters

```
public final class AeronCounters
extends Object
```
This class serves as a registry for all counter type IDs used by Aeron.
The following ranges are reserved:
- 0 - 99: for client/driver counters.
- 100 - 199: for archive counters.
- 200 - 299: for cluster counters.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`ARCHIVE_CONTROL_SESSIONS_TYPE_ID` The type id of the `Counter` used for keeping track of the count of concurrent control sessions.
`static int`	`ARCHIVE_ERROR_COUNT_TYPE_ID` The type id of the `Counter` used for keeping track of the number of errors that have occurred.
`static int`	`ARCHIVE_RECORDING_POSITION_TYPE_ID` The position a recording has reached when being archived.
`static int`	`CLUSTER_BACKUP_ERROR_COUNT_TYPE_ID` The type id of the `Counter` used for keeping track of the number of errors that have occurred.
`static int`	`CLUSTER_BACKUP_LIVE_LOG_POSITION_TYPE_ID` The type id of the `Counter` used for the live log position counter.
`static int`	`CLUSTER_BACKUP_QUERY_DEADLINE_TYPE_ID` The type id of the `Counter` used for the next query deadline counter.
`static int`	`CLUSTER_BACKUP_STATE_TYPE_ID` The type id of the `Counter` used for the backup state.
`static int`	`CLUSTER_CLIENT_TIMEOUT_COUNT_TYPE_ID` Counter type id for the number of cluster clients which have been timed out.
`static int`	`CLUSTER_CLUSTERED_SERVICE_ERROR_COUNT_TYPE_ID` Counter type id for the clustered service error count.
`static int`	`CLUSTER_COMMIT_POSITION_TYPE_ID` Counter type id of the commit position.
`static int`	`CLUSTER_CONSENSUS_MODULE_ERROR_COUNT_TYPE_ID` Counter type id for the consensus module error count.
`static int`	`CLUSTER_CONSENSUS_MODULE_STATE_TYPE_ID` Counter type id for the consensus module state.
`static int`	`CLUSTER_CONTROL_TOGGLE_TYPE_ID` Counter type id for the control toggle.
`static int`	`CLUSTER_ELECTION_STATE_TYPE_ID` Type id for election state counter.
`static int`	`CLUSTER_INVALID_REQUEST_COUNT_TYPE_ID` Counter type id for the number of invalid requests which the cluster has received.
`static int`	`CLUSTER_NODE_ROLE_TYPE_ID` Counter type id for the cluster node role.
`static int`	`CLUSTER_RECOVERY_STATE_TYPE_ID` Counter representing the Recovery State for the cluster.
`static int`	`CLUSTER_SNAPSHOT_COUNTER_TYPE_ID` Counter type id for count of snapshots taken.
`static int`	`DRIVER_HEARTBEAT_TYPE_ID` A counter for tracking the last heartbeat of an entity with a given registration id.
`static int`	`DRIVER_LOCAL_SOCKET_ADDRESS_STATUS_TYPE_ID` Counter used to store the status of a bind address and port for the local end of a channel.
`static int`	`DRIVER_PER_IMAGE_TYPE_ID` A counter per Image indicating presence of the congestion control.
`static int`	`DRIVER_PUBLISHER_LIMIT_TYPE_ID` The limit as a position in bytes applied to publishers on a session-channel-stream tuple.
`static int`	`DRIVER_PUBLISHER_POS_TYPE_ID` The position in bytes a publication has reached appending to the log.
`static int`	`DRIVER_RECEIVE_CHANNEL_STATUS_TYPE_ID` The status of a receive channel endpoint represented as a counter value.
`static int`	`DRIVER_RECEIVER_HWM_TYPE_ID` The highest position the Receiver has observed on a session-channel-stream tuple while rebuilding the stream.
`static int`	`DRIVER_RECEIVER_POS_TYPE_ID` The highest position the Receiver has rebuilt up to on a session-channel-stream tuple while rebuilding the stream.
`static int`	`DRIVER_SEND_CHANNEL_STATUS_TYPE_ID` The status of a send channel endpoint represented as a counter value.
`static int`	`DRIVER_SENDER_BPE_TYPE_ID` Count of back-pressure events (BPE)s a sender has experienced on a stream.
`static int`	`DRIVER_SENDER_LIMIT_TYPE_ID` The position the Sender can immediately send up-to on a session-channel-stream tuple.
`static int`	`DRIVER_SENDER_POSITION_TYPE_ID` The position the Sender has reached for sending data to the media on a session-channel-stream tuple.
`static int`	`DRIVER_SUBSCRIBER_POSITION_TYPE_ID` The position an individual Subscriber has reached on a session-channel-stream tuple.
`static int`	`DRIVER_SYSTEM_COUNTER_TYPE_ID` System wide counters for monitoring.
`static int`	`NAME_RESOLVER_CACHE_ENTRIES_COUNTER_TYPE_ID` Count of entries in the name resolver cache.
`static int`	`NAME_RESOLVER_NEIGHBORS_COUNTER_TYPE_ID` Count of media driver neighbors for name resolution.

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

- Field Detail
  - DRIVER_SYSTEM_COUNTER_TYPE_ID
```
public static final int DRIVER_SYSTEM_COUNTER_TYPE_ID
```
    System wide counters for monitoring. These are separate from counters used for position tracking on streams.
    
    See Also:
    
    Constant Field Values
  - DRIVER_PUBLISHER_LIMIT_TYPE_ID
```
public static final int DRIVER_PUBLISHER_LIMIT_TYPE_ID
```
    The limit as a position in bytes applied to publishers on a session-channel-stream tuple. Publishers will experience back pressure when this position is passed as a means of flow control.
    
    See Also:
    
    Constant Field Values
  - DRIVER_SENDER_POSITION_TYPE_ID
```
public static final int DRIVER_SENDER_POSITION_TYPE_ID
```
    The position the Sender has reached for sending data to the media on a session-channel-stream tuple.
    
    See Also:
    
    Constant Field Values
  - DRIVER_RECEIVER_HWM_TYPE_ID
```
public static final int DRIVER_RECEIVER_HWM_TYPE_ID
```
    The highest position the Receiver has observed on a session-channel-stream tuple while rebuilding the stream. It is possible the stream is not complete to this point if the stream has experienced loss.
    
    See Also:
    
    Constant Field Values
  - DRIVER_SUBSCRIBER_POSITION_TYPE_ID
```
public static final int DRIVER_SUBSCRIBER_POSITION_TYPE_ID
```
    The position an individual Subscriber has reached on a session-channel-stream tuple. It is possible to have multiple
    
    See Also:
    
    Constant Field Values
  - DRIVER_RECEIVER_POS_TYPE_ID
```
public static final int DRIVER_RECEIVER_POS_TYPE_ID
```
    The highest position the Receiver has rebuilt up to on a session-channel-stream tuple while rebuilding the stream. The stream is complete up to this point.
    
    See Also:
    
    Constant Field Values
  - DRIVER_SEND_CHANNEL_STATUS_TYPE_ID
```
public static final int DRIVER_SEND_CHANNEL_STATUS_TYPE_ID
```
    The status of a send channel endpoint represented as a counter value.
    
    See Also:
    
    Constant Field Values
  - DRIVER_RECEIVE_CHANNEL_STATUS_TYPE_ID
```
public static final int DRIVER_RECEIVE_CHANNEL_STATUS_TYPE_ID
```
    The status of a receive channel endpoint represented as a counter value.
    
    See Also:
    
    Constant Field Values
  - DRIVER_SENDER_LIMIT_TYPE_ID
```
public static final int DRIVER_SENDER_LIMIT_TYPE_ID
```
    The position the Sender can immediately send up-to on a session-channel-stream tuple.
    
    See Also:
    
    Constant Field Values
  - DRIVER_PER_IMAGE_TYPE_ID
```
public static final int DRIVER_PER_IMAGE_TYPE_ID
```
    A counter per Image indicating presence of the congestion control.
    
    See Also:
    
    Constant Field Values
  - DRIVER_HEARTBEAT_TYPE_ID
```
public static final int DRIVER_HEARTBEAT_TYPE_ID
```
    A counter for tracking the last heartbeat of an entity with a given registration id.
    
    See Also:
    
    Constant Field Values
  - DRIVER_PUBLISHER_POS_TYPE_ID
```
public static final int DRIVER_PUBLISHER_POS_TYPE_ID
```
    The position in bytes a publication has reached appending to the log.
    Note: This is a not a real-time value like the other and is updated one per second for monitoring purposes.
    
    See Also:
    
    Constant Field Values
  - DRIVER_SENDER_BPE_TYPE_ID
```
public static final int DRIVER_SENDER_BPE_TYPE_ID
```
    Count of back-pressure events (BPE)s a sender has experienced on a stream.
    
    See Also:
    
    Constant Field Values
  - NAME_RESOLVER_NEIGHBORS_COUNTER_TYPE_ID
```
public static final int NAME_RESOLVER_NEIGHBORS_COUNTER_TYPE_ID
```
    Count of media driver neighbors for name resolution.
    
    See Also:
    
    Constant Field Values
  - NAME_RESOLVER_CACHE_ENTRIES_COUNTER_TYPE_ID
```
public static final int NAME_RESOLVER_CACHE_ENTRIES_COUNTER_TYPE_ID
```
    Count of entries in the name resolver cache.
    
    See Also:
    
    Constant Field Values
  - DRIVER_LOCAL_SOCKET_ADDRESS_STATUS_TYPE_ID
```
public static final int DRIVER_LOCAL_SOCKET_ADDRESS_STATUS_TYPE_ID
```
    Counter used to store the status of a bind address and port for the local end of a channel.
    When the value is ChannelEndpointStatus.ACTIVE then the key value and label will be updated with the socket address and port which is bound.
    
    See Also:
    
    Constant Field Values
  - ARCHIVE_RECORDING_POSITION_TYPE_ID
```
public static final int ARCHIVE_RECORDING_POSITION_TYPE_ID
```
    The position a recording has reached when being archived.
    
    See Also:
    
    Constant Field Values
  - ARCHIVE_ERROR_COUNT_TYPE_ID
```
public static final int ARCHIVE_ERROR_COUNT_TYPE_ID
```
    The type id of the Counter used for keeping track of the number of errors that have occurred.
    
    See Also:
    
    Constant Field Values
  - ARCHIVE_CONTROL_SESSIONS_TYPE_ID
```
public static final int ARCHIVE_CONTROL_SESSIONS_TYPE_ID
```
    The type id of the Counter used for keeping track of the count of concurrent control sessions.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_CONSENSUS_MODULE_STATE_TYPE_ID
```
public static final int CLUSTER_CONSENSUS_MODULE_STATE_TYPE_ID
```
    Counter type id for the consensus module state.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_NODE_ROLE_TYPE_ID
```
public static final int CLUSTER_NODE_ROLE_TYPE_ID
```
    Counter type id for the cluster node role.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_CONTROL_TOGGLE_TYPE_ID
```
public static final int CLUSTER_CONTROL_TOGGLE_TYPE_ID
```
    Counter type id for the control toggle.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_COMMIT_POSITION_TYPE_ID
```
public static final int CLUSTER_COMMIT_POSITION_TYPE_ID
```
    Counter type id of the commit position.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_RECOVERY_STATE_TYPE_ID
```
public static final int CLUSTER_RECOVERY_STATE_TYPE_ID
```
    Counter representing the Recovery State for the cluster.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_SNAPSHOT_COUNTER_TYPE_ID
```
public static final int CLUSTER_SNAPSHOT_COUNTER_TYPE_ID
```
    Counter type id for count of snapshots taken.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_ELECTION_STATE_TYPE_ID
```
public static final int CLUSTER_ELECTION_STATE_TYPE_ID
```
    Type id for election state counter.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_BACKUP_STATE_TYPE_ID
```
public static final int CLUSTER_BACKUP_STATE_TYPE_ID
```
    The type id of the Counter used for the backup state.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_BACKUP_LIVE_LOG_POSITION_TYPE_ID
```
public static final int CLUSTER_BACKUP_LIVE_LOG_POSITION_TYPE_ID
```
    The type id of the Counter used for the live log position counter.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_BACKUP_QUERY_DEADLINE_TYPE_ID
```
public static final int CLUSTER_BACKUP_QUERY_DEADLINE_TYPE_ID
```
    The type id of the Counter used for the next query deadline counter.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_BACKUP_ERROR_COUNT_TYPE_ID
```
public static final int CLUSTER_BACKUP_ERROR_COUNT_TYPE_ID
```
    The type id of the Counter used for keeping track of the number of errors that have occurred.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_CONSENSUS_MODULE_ERROR_COUNT_TYPE_ID
```
public static final int CLUSTER_CONSENSUS_MODULE_ERROR_COUNT_TYPE_ID
```
    Counter type id for the consensus module error count.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_CLIENT_TIMEOUT_COUNT_TYPE_ID
```
public static final int CLUSTER_CLIENT_TIMEOUT_COUNT_TYPE_ID
```
    Counter type id for the number of cluster clients which have been timed out.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_INVALID_REQUEST_COUNT_TYPE_ID
```
public static final int CLUSTER_INVALID_REQUEST_COUNT_TYPE_ID
```
    Counter type id for the number of invalid requests which the cluster has received.
    
    See Also:
    
    Constant Field Values
  - CLUSTER_CLUSTERED_SERVICE_ERROR_COUNT_TYPE_ID
```
public static final int CLUSTER_CLUSTERED_SERVICE_ERROR_COUNT_TYPE_ID
```
    Counter type id for the clustered service error count.
    
    See Also:
    
    Constant Field Values

Class AeronCounters

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DRIVER_SYSTEM_COUNTER_TYPE_ID

DRIVER_PUBLISHER_LIMIT_TYPE_ID

DRIVER_SENDER_POSITION_TYPE_ID

DRIVER_RECEIVER_HWM_TYPE_ID

DRIVER_SUBSCRIBER_POSITION_TYPE_ID

DRIVER_RECEIVER_POS_TYPE_ID

DRIVER_SEND_CHANNEL_STATUS_TYPE_ID

DRIVER_RECEIVE_CHANNEL_STATUS_TYPE_ID

DRIVER_SENDER_LIMIT_TYPE_ID

DRIVER_PER_IMAGE_TYPE_ID

DRIVER_HEARTBEAT_TYPE_ID

DRIVER_PUBLISHER_POS_TYPE_ID

DRIVER_SENDER_BPE_TYPE_ID

NAME_RESOLVER_NEIGHBORS_COUNTER_TYPE_ID

NAME_RESOLVER_CACHE_ENTRIES_COUNTER_TYPE_ID

DRIVER_LOCAL_SOCKET_ADDRESS_STATUS_TYPE_ID

ARCHIVE_RECORDING_POSITION_TYPE_ID

ARCHIVE_ERROR_COUNT_TYPE_ID

ARCHIVE_CONTROL_SESSIONS_TYPE_ID

CLUSTER_CONSENSUS_MODULE_STATE_TYPE_ID

CLUSTER_NODE_ROLE_TYPE_ID

CLUSTER_CONTROL_TOGGLE_TYPE_ID

CLUSTER_COMMIT_POSITION_TYPE_ID

CLUSTER_RECOVERY_STATE_TYPE_ID

CLUSTER_SNAPSHOT_COUNTER_TYPE_ID

CLUSTER_ELECTION_STATE_TYPE_ID

CLUSTER_BACKUP_STATE_TYPE_ID

CLUSTER_BACKUP_LIVE_LOG_POSITION_TYPE_ID

CLUSTER_BACKUP_QUERY_DEADLINE_TYPE_ID

CLUSTER_BACKUP_ERROR_COUNT_TYPE_ID

CLUSTER_CONSENSUS_MODULE_ERROR_COUNT_TYPE_ID

CLUSTER_CLIENT_TIMEOUT_COUNT_TYPE_ID

CLUSTER_INVALID_REQUEST_COUNT_TYPE_ID

CLUSTER_CLUSTERED_SERVICE_ERROR_COUNT_TYPE_ID