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/*
* 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.indices;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.IndexService;
import org.elasticsearch.index.shard.IndexShardState;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.index.shard.IndexShard;
/**
* A global component allowing to register for lifecycle of an index (create/closed) and
* an index shard (created/closed).
*/
public interface IndicesLifecycle {
/**
* Add a listener.
*/
void addListener(Listener listener);
/**
* Remove a listener.
*/
void removeListener(Listener listener);
/**
* A listener for index and index shard lifecycle events (create/closed).
*/
public abstract static class Listener {
/**
* Called when the shard routing has changed state.
*
* @param indexShard The index shard
* @param oldRouting The old routing state (can be null)
* @param newRouting The new routing state
*/
public void shardRoutingChanged(IndexShard indexShard, @Nullable ShardRouting oldRouting, ShardRouting newRouting) {
}
/**
* Called on the Master node only before the index is created
*/
public void beforeIndexAddedToCluster(Index index, Settings indexSettings) {
}
/**
* Called before the index gets created. Note that this is also called
* when the index is created on data nodes
*/
public void beforeIndexCreated(Index index, Settings indexSettings) {
}
/**
* Called after the index has been created.
*/
public void afterIndexCreated(IndexService indexService) {
}
/**
* Called before the index shard gets created.
*/
public void beforeIndexShardCreated(ShardId shardId, Settings indexSettings) {
}
/**
* Called after the index shard has been created.
*/
public void afterIndexShardCreated(IndexShard indexShard) {
}
/**
* Called right after the shard is moved into POST_RECOVERY mode
*/
public void afterIndexShardPostRecovery(IndexShard indexShard) {}
/**
* Called right before the shard is moved into POST_RECOVERY mode.
* The shard is ready to be used but not yet marked as POST_RECOVERY.
*/
public void beforeIndexShardPostRecovery(IndexShard indexShard) {}
/**
* Called after the index shard has been started.
*/
public void afterIndexShardStarted(IndexShard indexShard) {
}
/**
* Called before the index get closed.
*
* @param indexService The index service
*/
public void beforeIndexClosed(IndexService indexService) {
}
/**
* Called after the index has been closed.
*
* @param index The index
*/
public void afterIndexClosed(Index index, Settings indexSettings) {
}
/**
* Called before the index shard gets closed.
*
* @param indexShard The index shard
*/
public void beforeIndexShardClosed(ShardId shardId, @Nullable IndexShard indexShard,
Settings indexSettings) {
}
/**
* Called after the index shard has been closed.
*
* @param shardId The shard id
*/
public void afterIndexShardClosed(ShardId shardId, @Nullable IndexShard indexShard,
Settings indexSettings) {
}
/**
* Called before the index shard gets deleted from disk
* Note: this method is only executed on the first attempt of deleting the shard. Retries are will not invoke
* this method.
* @param shardId The shard id
* @param indexSettings the shards index settings
*/
public void beforeIndexShardDeleted(ShardId shardId, Settings indexSettings) {
}
/**
* Called after the index shard has been deleted from disk.
*
* Note: this method is only called if the deletion of the shard did finish without an exception
*
* @param shardId The shard id
* @param indexSettings the shards index settings
*/
public void afterIndexShardDeleted(ShardId shardId, Settings indexSettings) {
}
/**
* Called after a shard's {@link org.elasticsearch.index.shard.IndexShardState} changes.
* The order of concurrent events is preserved. The execution must be lightweight.
*
* @param indexShard the shard the new state was applied to
* @param previousState the previous index shard state if there was one, null otherwise
* @param currentState the new shard state
* @param reason the reason for the state change if there is one, null otherwise
*/
public void indexShardStateChanged(IndexShard indexShard, @Nullable IndexShardState previousState, IndexShardState currentState, @Nullable String reason) {
}
/**
* Called after the index has been deleted.
* This listener method is invoked after {@link #afterIndexClosed(org.elasticsearch.index.Index, org.elasticsearch.common.settings.Settings)}
* when an index is deleted
*
* @param index The index
*/
public void afterIndexDeleted(Index index, Settings indexSettings) {
}
/**
* Called before the index gets deleted.
* This listener method is invoked after
* {@link #beforeIndexClosed(org.elasticsearch.index.IndexService)} when an index is deleted
*
* @param indexService The index service
*/
public void beforeIndexDeleted(IndexService indexService) {
}
/**
* Called when a shard is marked as inactive
*
* @param indexShard The shard that was marked inactive
*/
public void onShardInactive(IndexShard indexShard) {
}
}
}