Module org.elasticsearch.server
Package org.elasticsearch.cluster.service

Class ClusterApplierService

java.lang.Object
org.elasticsearch.common.component.AbstractLifecycleComponent
org.elasticsearch.cluster.service.ClusterApplierService
All Implemented Interfaces:
Closeable, AutoCloseable, ClusterApplier, LifecycleComponent, Releasable
public class ClusterApplierService extends AbstractLifecycleComponent implements ClusterApplier

  • Field Details

    • CLUSTER_SERVICE_SLOW_TASK_LOGGING_THRESHOLD_SETTING

      public static final Setting<TimeValue> CLUSTER_SERVICE_SLOW_TASK_LOGGING_THRESHOLD_SETTING

    • CLUSTER_UPDATE_THREAD_NAME

      public static final String CLUSTER_UPDATE_THREAD_NAME
      See Also:

  • Constructor Details

  • Method Details

    • setNodeConnectionsService

      public void setNodeConnectionsService(NodeConnectionsService nodeConnectionsService)

    • setInitialState

      public void setInitialState(ClusterState initialState)
      Description copied from interface: ClusterApplier
      Sets the initial state for this applier. Should only be called once.
      Specified by:
      setInitialState in interface ClusterApplier
      Parameters:
      initialState - the initial state to set

    • doStart

      protected void doStart()
      Description copied from class: AbstractLifecycleComponent
      Start this component. Typically that means doing things like launching background processes and registering listeners on other components. Other components have been initialized by this point, but may not yet be started.

      If this method throws an exception then the startup process will fail, but this component will not be stopped before it is closed.

      This method is called while synchronized on AbstractLifecycleComponent.lifecycle. It is only called once in the lifetime of a component, although it may not be called at all if the startup process encountered some kind of fatal error, such as the failure of some other component to initialize or start.

      Specified by:
      doStart in class AbstractLifecycleComponent

    • createThreadPoolExecutor

      protected PrioritizedEsThreadPoolExecutor createThreadPoolExecutor()

    • doStop

      protected void doStop()
      Description copied from class: AbstractLifecycleComponent
      Stop this component. Typically that means doing the reverse of whatever AbstractLifecycleComponent.doStart() does.

      This method is called while synchronized on AbstractLifecycleComponent.lifecycle. It is only called once in the lifetime of a component, after calling AbstractLifecycleComponent.doStart(), although it will not be called at all if this component did not successfully start.

      Specified by:
      doStop in class AbstractLifecycleComponent

    • doClose

      protected void doClose()
      Description copied from class: AbstractLifecycleComponent
      Close this component. Typically that means doing the reverse of whatever happened during initialization, such as releasing resources acquired there.

      This method is called while synchronized on AbstractLifecycleComponent.lifecycle. It is called once in the lifetime of a component. If the component was started then it will be stopped before it is closed, and once it is closed it will not be started or stopped.

      Specified by:
      doClose in class AbstractLifecycleComponent

    • state

      public ClusterState state()
      The current cluster state. Should be renamed to appliedClusterState

    • addHighPriorityApplier

      public void addHighPriorityApplier(ClusterStateApplier applier)
      Adds a high priority applier of updated cluster states.

    • addLowPriorityApplier

      public void addLowPriorityApplier(ClusterStateApplier applier)
      Adds an applier which will be called after all high priority and normal appliers have been called.

    • addStateApplier

      public void addStateApplier(ClusterStateApplier applier)
      Adds a applier of updated cluster states.

    • removeApplier

      public void removeApplier(ClusterStateApplier applier)
      Removes an applier of updated cluster states.

    • addListener

      public void addListener(ClusterStateListener listener)
      Add a listener for updated cluster states. Listeners are executed in the system thread context.

    • removeListener

      public void removeListener(ClusterStateListener listener)
      Removes a listener for updated cluster states.

    • removeTimeoutListener

      public void removeTimeoutListener(TimeoutClusterStateListener listener)
      Removes a timeout listener for updated cluster states.

    • addLocalNodeMasterListener

      public void addLocalNodeMasterListener(LocalNodeMasterListener listener)
      Add a listener for on/off local node master events

    • addTimeoutListener

      public void addTimeoutListener(@Nullable TimeValue timeout, TimeoutClusterStateListener listener)
      Adds a cluster state listener that is expected to be removed during a short period of time. If provided, the listener will be notified once a specific time has elapsed. NOTE: the listener is not removed on timeout. This is the responsibility of the caller.

    • runOnApplierThread

      public void runOnApplierThread(String source, Priority priority, Consumer<ClusterState> clusterStateConsumer, ActionListener<Void> listener)
      Run the given clusterStateConsumer on the applier thread. Should only be used in tests, by IndicesClusterStateService when trying to acquire shard locks and create shards, and by IndicesStore when it's deleting the data behind a shard that moved away from a node.

    • threadPool

      public ThreadPool threadPool()

    • onNewClusterState

      public void onNewClusterState(String source, Supplier<ClusterState> clusterStateSupplier, ActionListener<Void> listener)
      Description copied from interface: ClusterApplier
      Method to invoke when a new cluster state is available to be applied
      Specified by:
      onNewClusterState in interface ClusterApplier
      Parameters:
      source - information where the cluster state came from
      clusterStateSupplier - the cluster state supplier which provides the latest cluster state to apply
      listener - notified after cluster state is applied. The implementation must not throw exceptions: an exception thrown by this listener is logged by the cluster applier service at ERROR level and otherwise ignored, except in tests where it raises an AssertionError. If log-and-ignore is the right behaviour then implementations must do so themselves, typically using a more specific logger and at a less dramatic log level.

    • assertNotClusterStateUpdateThread

      public static boolean assertNotClusterStateUpdateThread(String reason)
      asserts that the current thread is NOT the cluster state update thread

    • connectToNodesAndWait

      protected void connectToNodesAndWait(ClusterState newClusterState)

    • connectToNodesAsync

      protected final void connectToNodesAsync(ClusterState newClusterState, Runnable onCompletion)

    • applicationMayFail

      protected boolean applicationMayFail()

    • getStats

      public ClusterApplierRecordingService.Stats getStats()
      Specified by:
      getStats in interface ClusterApplier

    • getTimeoutClusterStateListenersSize

      public int getTimeoutClusterStateListenersSize()