org.elasticsearch.repositories.Repository Maven / Gradle / Ivy
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* the Apache License, Version 2.0 (the "License"); you may
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* 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,
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*/
package org.elasticsearch.repositories;
import com.google.common.collect.ImmutableList;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.metadata.SnapshotId;
import org.elasticsearch.common.component.LifecycleComponent;
import org.elasticsearch.snapshots.Snapshot;
import org.elasticsearch.snapshots.SnapshotShardFailure;
/**
* Snapshot repository interface.
*
* Responsible for index and cluster level operations. It's called only on master.
* Shard-level operations are performed using {@link org.elasticsearch.index.snapshots.IndexShardRepository}
* interface on data nodes.
*
* Typical snapshot usage pattern:
*
* - Master calls {@link #initializeSnapshot(org.elasticsearch.cluster.metadata.SnapshotId, com.google.common.collect.ImmutableList, org.elasticsearch.cluster.metadata.MetaData)}
* with list of indices that will be included into the snapshot
* - Data nodes call {@link org.elasticsearch.index.snapshots.IndexShardRepository#snapshot(org.elasticsearch.cluster.metadata.SnapshotId, org.elasticsearch.index.shard.ShardId, org.elasticsearch.index.deletionpolicy.SnapshotIndexCommit, org.elasticsearch.index.snapshots.IndexShardSnapshotStatus)} for each shard
* - When all shard calls return master calls {@link #finalizeSnapshot(org.elasticsearch.cluster.metadata.SnapshotId, String, int, com.google.common.collect.ImmutableList)}
* with possible list of failures
*
*/
public interface Repository extends LifecycleComponent {
/**
* Reads snapshot description from repository.
*
* @param snapshotId snapshot ID
* @return information about snapshot
*/
Snapshot readSnapshot(SnapshotId snapshotId);
/**
* Returns global metadata associate with the snapshot.
*
* The returned meta data contains global metadata as well as metadata for all indices listed in the indices parameter.
*
* @param snapshotId snapshot ID
* @param indices list of indices
* @return information about snapshot
*/
MetaData readSnapshotMetaData(SnapshotId snapshotId, ImmutableList indices);
/**
* Returns the list of snapshots currently stored in the repository
*
* @return snapshot list
*/
ImmutableList snapshots();
/**
* Starts snapshotting process
*
* @param snapshotId snapshot id
* @param indices list of indices to be snapshotted
* @param metaData cluster metadata
*/
void initializeSnapshot(SnapshotId snapshotId, ImmutableList indices, MetaData metaData);
/**
* Finalizes snapshotting process
*
* This method is called on master after all shards are snapshotted.
*
* @param snapshotId snapshot id
* @param failure global failure reason or null
* @param totalShards total number of shards
* @param shardFailures list of shard failures
* @return snapshot description
*/
Snapshot finalizeSnapshot(SnapshotId snapshotId, String failure, int totalShards, ImmutableList shardFailures);
/**
* Deletes snapshot
*
* @param snapshotId snapshot id
*/
void deleteSnapshot(SnapshotId snapshotId);
/**
* Returns snapshot throttle time in nanoseconds
*/
long snapshotThrottleTimeInNanos();
/**
* Returns restore throttle time in nanoseconds
*/
long restoreThrottleTimeInNanos();
}