org.elasticsearch.cluster.metadata.MetaDataDeleteIndexService Maven / Gradle / Ivy
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* Licensed to ElasticSearch and Shay Banon under one
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* 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
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* Unless required by applicable law or agreed to in writing,
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* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.cluster.metadata;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ClusterStateUpdateTask;
import org.elasticsearch.cluster.action.index.NodeIndexDeletedAction;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.Index;
import org.elasticsearch.indices.IndexMissingException;
import org.elasticsearch.threadpool.ThreadPool;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import static org.elasticsearch.cluster.ClusterState.newClusterStateBuilder;
import static org.elasticsearch.cluster.metadata.MetaData.newMetaDataBuilder;
/**
*
*/
public class MetaDataDeleteIndexService extends AbstractComponent {
private final ThreadPool threadPool;
private final ClusterService clusterService;
private final AllocationService allocationService;
private final NodeIndexDeletedAction nodeIndexDeletedAction;
private final MetaDataService metaDataService;
@Inject
public MetaDataDeleteIndexService(Settings settings, ThreadPool threadPool, ClusterService clusterService, AllocationService allocationService,
NodeIndexDeletedAction nodeIndexDeletedAction, MetaDataService metaDataService) {
super(settings);
this.threadPool = threadPool;
this.clusterService = clusterService;
this.allocationService = allocationService;
this.nodeIndexDeletedAction = nodeIndexDeletedAction;
this.metaDataService = metaDataService;
}
public void deleteIndex(final Request request, final Listener userListener) {
// we lock here, and not within the cluster service callback since we don't want to
// block the whole cluster state handling
MetaDataService.MdLock mdLock = metaDataService.indexMetaDataLock(request.index);
try {
mdLock.lock();
} catch (InterruptedException e) {
userListener.onFailure(e);
return;
}
final DeleteIndexListener listener = new DeleteIndexListener(mdLock, request, userListener);
clusterService.submitStateUpdateTask("delete-index [" + request.index + "]", Priority.URGENT, new ClusterStateUpdateTask() {
@Override
public ClusterState execute(ClusterState currentState) {
try {
if (!currentState.metaData().hasConcreteIndex(request.index)) {
listener.onFailure(new IndexMissingException(new Index(request.index)));
return currentState;
}
logger.info("[{}] deleting index", request.index);
RoutingTable.Builder routingTableBuilder = RoutingTable.builder().routingTable(currentState.routingTable());
routingTableBuilder.remove(request.index);
MetaData newMetaData = newMetaDataBuilder()
.metaData(currentState.metaData())
.remove(request.index)
.build();
RoutingAllocation.Result routingResult = allocationService.reroute(
newClusterStateBuilder().state(currentState).routingTable(routingTableBuilder).metaData(newMetaData).build());
ClusterBlocks blocks = ClusterBlocks.builder().blocks(currentState.blocks()).removeIndexBlocks(request.index).build();
final AtomicInteger counter = new AtomicInteger(currentState.nodes().size());
final NodeIndexDeletedAction.Listener nodeIndexDeleteListener = new NodeIndexDeletedAction.Listener() {
@Override
public void onNodeIndexDeleted(String index, String nodeId) {
if (index.equals(request.index)) {
if (counter.decrementAndGet() == 0) {
listener.onResponse(new Response(true));
nodeIndexDeletedAction.remove(this);
}
}
}
};
nodeIndexDeletedAction.add(nodeIndexDeleteListener);
listener.future = threadPool.schedule(request.timeout, ThreadPool.Names.SAME, new Runnable() {
@Override
public void run() {
listener.onResponse(new Response(false));
nodeIndexDeletedAction.remove(nodeIndexDeleteListener);
}
});
return newClusterStateBuilder().state(currentState).routingResult(routingResult).metaData(newMetaData).blocks(blocks).build();
} catch (Throwable e) {
listener.onFailure(e);
return currentState;
}
}
});
}
class DeleteIndexListener implements Listener {
private final AtomicBoolean notified = new AtomicBoolean();
private final MetaDataService.MdLock mdLock;
private final Request request;
private final Listener listener;
volatile ScheduledFuture future;
private DeleteIndexListener(MetaDataService.MdLock mdLock, Request request, Listener listener) {
this.mdLock = mdLock;
this.request = request;
this.listener = listener;
}
@Override
public void onResponse(final Response response) {
if (notified.compareAndSet(false, true)) {
mdLock.unlock();
if (future != null) {
future.cancel(false);
}
listener.onResponse(response);
}
}
@Override
public void onFailure(Throwable t) {
if (notified.compareAndSet(false, true)) {
mdLock.unlock();
if (future != null) {
future.cancel(false);
}
listener.onFailure(t);
}
}
}
public static interface Listener {
void onResponse(Response response);
void onFailure(Throwable t);
}
public static class Request {
final String index;
TimeValue timeout = TimeValue.timeValueSeconds(10);
public Request(String index) {
this.index = index;
}
public Request timeout(TimeValue timeout) {
this.timeout = timeout;
return this;
}
}
public static class Response {
private final boolean acknowledged;
public Response(boolean acknowledged) {
this.acknowledged = acknowledged;
}
public boolean acknowledged() {
return acknowledged;
}
}
}