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This OSGi bundle wraps ${pkgArtifactId} ${pkgVersion} jar file.
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.cluster.routing;
/**
* Similar to {@link ImmutableShardRouting} this class keeps metadata of the current shard. But unlike
* {@link ImmutableShardRouting} the information kept in this class can be modified.
* These modifications include changing the primary state, relocating and assigning the shard
* represented by this class
*/
public class MutableShardRouting extends ImmutableShardRouting {
public MutableShardRouting(ShardRouting copy) {
super(copy);
}
public MutableShardRouting(ShardRouting copy, long version) {
super(copy, version);
}
public MutableShardRouting(String index, int shardId, String currentNodeId,
String relocatingNodeId, RestoreSource restoreSource, boolean primary, ShardRoutingState state, long version) {
super(index, shardId, currentNodeId, relocatingNodeId, restoreSource, primary, state, version);
assert state != ShardRoutingState.UNASSIGNED : "new mutable routing should not be created with UNASSIGNED state, should moveToUnassigned";
}
/**
* Moves the shard to unassigned state.
*/
void moveToUnassigned(UnassignedInfo unassignedInfo) {
version++;
assert state != ShardRoutingState.UNASSIGNED;
state = ShardRoutingState.UNASSIGNED;
currentNodeId = null;
relocatingNodeId = null;
this.unassignedInfo = unassignedInfo;
}
/**
* Assign this shard to a node.
*
* @param nodeId id of the node to assign this shard to
*/
void assignToNode(String nodeId) {
version++;
if (currentNodeId == null) {
assert state == ShardRoutingState.UNASSIGNED;
state = ShardRoutingState.INITIALIZING;
currentNodeId = nodeId;
relocatingNodeId = null;
} else if (state == ShardRoutingState.STARTED) {
state = ShardRoutingState.RELOCATING;
relocatingNodeId = nodeId;
} else if (state == ShardRoutingState.RELOCATING) {
assert nodeId.equals(relocatingNodeId);
}
}
/**
* Relocate the shard to another node.
*
* @param relocatingNodeId id of the node to relocate the shard
*/
void relocate(String relocatingNodeId) {
version++;
assert state == ShardRoutingState.STARTED;
state = ShardRoutingState.RELOCATING;
this.relocatingNodeId = relocatingNodeId;
}
/**
* Cancel relocation of a shard. The shards state must be set
* to RELOCATING
.
*/
void cancelRelocation() {
version++;
assert state == ShardRoutingState.RELOCATING;
assert assignedToNode();
assert relocatingNodeId != null;
state = ShardRoutingState.STARTED;
relocatingNodeId = null;
}
/**
* Moves the shard from started to initializing and bumps the version
*/
void reinitializeShard() {
assert state == ShardRoutingState.STARTED;
version++;
state = ShardRoutingState.INITIALIZING;
}
/**
* Set the shards state to STARTED
. The shards state must be
* INITIALIZING
or RELOCATING
. Any relocation will be
* canceled.
*/
void moveToStarted() {
version++;
assert state == ShardRoutingState.INITIALIZING || state == ShardRoutingState.RELOCATING;
relocatingNodeId = null;
restoreSource = null;
state = ShardRoutingState.STARTED;
unassignedInfo = null; // we keep the unassigned data until the shard is started
}
/**
* Make the shard primary unless it's not Primary
* //TODO: doc exception
*/
void moveToPrimary() {
version++;
if (primary) {
throw new IllegalShardRoutingStateException(this, "Already primary, can't move to primary");
}
primary = true;
}
/**
* Set the primary shard to non-primary
*/
void moveFromPrimary() {
version++;
if (!primary) {
throw new IllegalShardRoutingStateException(this, "Not primary, can't move to replica");
}
primary = false;
}
private long hashVersion = version-1;
private int hashCode = 0;
@Override
public int hashCode() {
hashCode = (hashVersion != version ? super.hashCode() : hashCode);
hashVersion = version;
return hashCode;
}
}