/*
* 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.gateway.none;
import org.apache.lucene.util.IOUtils;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.cluster.*;
import org.elasticsearch.cluster.action.index.NodeIndexDeletedAction;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.component.AbstractLifecycleComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.Module;
import org.elasticsearch.common.io.FileSystemUtils;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.NodeEnvironment;
import org.elasticsearch.gateway.Gateway;
import org.elasticsearch.gateway.GatewayException;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.gateway.none.NoneIndexGatewayModule;
/**
*
*/
public class NoneGateway extends AbstractLifecycleComponent<Gateway> implements Gateway, ClusterStateListener {
public static final String TYPE = "none";
private final ClusterService clusterService;
private final NodeEnvironment nodeEnv;
private final NodeIndexDeletedAction nodeIndexDeletedAction;
private final ClusterName clusterName;
@Nullable
private volatile MetaData currentMetaData;
@Inject
public NoneGateway(Settings settings, ClusterService clusterService, NodeEnvironment nodeEnv, NodeIndexDeletedAction nodeIndexDeletedAction, ClusterName clusterName) {
super(settings);
this.clusterService = clusterService;
this.nodeEnv = nodeEnv;
this.nodeIndexDeletedAction = nodeIndexDeletedAction;
this.clusterName = clusterName;
clusterService.addLast(this);
}
@Override
public String type() {
return TYPE;
}
@Override
public String toString() {
return "_none_";
}
@Override
protected void doStart() throws ElasticsearchException {
}
@Override
protected void doStop() throws ElasticsearchException {
}
@Override
protected void doClose() throws ElasticsearchException {
}
@Override
public void performStateRecovery(GatewayStateRecoveredListener listener) throws GatewayException {
logger.debug("performing state recovery");
listener.onSuccess(ClusterState.builder(clusterName).build());
}
@Override
public Class<? extends Module> suggestIndexGateway() {
return NoneIndexGatewayModule.class;
}
@Override
public void reset() {
}
@Override
public void clusterChanged(ClusterChangedEvent event) {
if (event.state().blocks().disableStatePersistence()) {
// reset the current metadata, we need to start fresh...
this.currentMetaData = null;
return;
}
MetaData newMetaData = event.state().metaData();
// delete indices that were there before, but are deleted now
// we need to do it so they won't be detected as dangling
if (currentMetaData != null) {
// only delete indices when we already received a state (currentMetaData != null)
for (IndexMetaData current : currentMetaData) {
if (!newMetaData.hasIndex(current.index())) {
logger.debug("[{}] deleting index that is no longer part of the metadata (indices: [{}])", current.index(), newMetaData.indices().keys());
if (nodeEnv.hasNodeFile()) {
try {
IOUtils.rm(FileSystemUtils.toPaths(nodeEnv.indexLocations(new Index(current.index()))));
} catch (Exception ex) {
logger.debug("failed to delete shard locations", ex);
}
}
try {
nodeIndexDeletedAction.nodeIndexStoreDeleted(event.state(), current.index(), event.state().nodes().localNodeId());
} catch (Exception e) {
logger.debug("[{}] failed to notify master on local index store deletion", e, current.index());
}
}
}
}
currentMetaData = newMetaData;
}
}