# Package org.apache.ignite.events

Contains Event Subscription functionality together with various events emitted by Ignite.

- Interface Summary
  Interface | Description
  --- | ---
  CacheConsistencyViolationEvent.EntriesInfo | Inconsistent entries mapping.
  CacheConsistencyViolationEvent.EntryInfo | Inconsistent entry info.
  Event | Grid events are used for notification about what happens within the grid.
  EventType | Contains event type constants.

- Class Summary
  Class | Description
  --- | ---
  BaselineChangedEvent | Baseline changed event.
  BaselineConfigurationChangedEvent | Baseline configuration changed event.
  CacheConsistencyViolationEvent | This is an experimental API.
  CacheEvent | In-memory database (cache) event.
  CacheObjectTransformedEvent |
  CacheQueryExecutedEvent<K,​V> | Cache query execution event.
  CacheQueryReadEvent<K,​V> | Cache query read event.
  CacheRebalancingEvent | In-memory database (cache) rebalancing event.
  CheckpointEvent | Grid checkpoint event.
  ClusterActivationEvent | Deprecated. Use `ClusterStateChangeEvent` instead.
  ClusterStateChangeEvent | Cluster state change event.
  ClusterStateChangeStartedEvent | Cluster state change started event.
  ClusterTagUpdatedEvent | Event type indicating that cluster tag has been updated.
  DeploymentEvent | Grid deployment event.
  DiscoveryEvent | Grid discovery event.
  EventAdapter | Base adapter for the events.
  JobEvent | Grid job event.
  NodeValidationFailedEvent | This event is triggered if any of `GridComponent`s fail to validate the joining node while join message processing.
  PageReplacementStartedEvent | Event type indicating that page replacement started in one of the configured data regions.
  SnapshotEvent | Event indicating the cluster snapshot operation result state with the given name.
  SqlQueryExecutionEvent | Query execution event.
  TaskEvent | Grid task event.
  TransactionStateChangedEvent | Event indicates transaction state change.
  WalSegmentArchivedEvent | Event indicates the completion of WAL segment file transition to archive.
  WalSegmentCompactedEvent | Event indicates the completion of WAL segment compaction.