org.elasticsearch.cluster.AckedClusterStateUpdateTask Maven / Gradle / Ivy
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* the Apache License, Version 2.0 (the "License"); you may
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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*/
package org.elasticsearch.cluster;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.unit.TimeValue;
/**
* An extension interface to {@link ClusterStateUpdateTask} that allows to be notified when
* all the nodes have acknowledged a cluster state update request
*/
public interface AckedClusterStateUpdateTask extends TimeoutClusterStateUpdateTask {
/**
* Called to determine which nodes the acknowledgement is expected from
* @param discoveryNode a node
* @return true if the node is expected to send ack back, false otherwise
*/
boolean mustAck(DiscoveryNode discoveryNode);
/**
* Called once all the nodes have acknowledged the cluster state update request. Must be
* very lightweight execution, since it gets executed on the cluster service thread.
* @param t optional error that might have been thrown
*/
void onAllNodesAcked(@Nullable Throwable t);
/**
* Called once the acknowledgement timeout defined by
* {@link AckedClusterStateUpdateTask#ackTimeout()} has expired
*/
void onAckTimeout();
/**
* Acknowledgement timeout, maximum time interval to wait for acknowledgements
*/
TimeValue ackTimeout();
}