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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.cluster.metadata;
import org.elasticsearch.action.support.master.MasterNodeOperationRequest;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.TimeoutClusterStateUpdateTask;
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.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
/**
*
*/
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
final Semaphore mdLock = metaDataService.indexMetaDataLock(request.index);
// quick check to see if we can acquire a lock, otherwise spawn to a thread pool
if (mdLock.tryAcquire()) {
deleteIndex(request, userListener, mdLock);
return;
}
threadPool.executor(ThreadPool.Names.MANAGEMENT).execute(new Runnable() {
@Override
public void run() {
try {
if (!mdLock.tryAcquire(request.masterTimeout.nanos(), TimeUnit.NANOSECONDS)) {
userListener.onFailure(new ProcessClusterEventTimeoutException(request.masterTimeout, "acquire index lock"));
return;
}
} catch (InterruptedException e) {
userListener.onFailure(e);
return;
}
deleteIndex(request, userListener, mdLock);
}
});
}
private void deleteIndex(final Request request, final Listener userListener, Semaphore mdLock) {
final DeleteIndexListener listener = new DeleteIndexListener(mdLock, userListener);
clusterService.submitStateUpdateTask("delete-index [" + request.index + "]", Priority.URGENT, new TimeoutClusterStateUpdateTask() {
@Override
public TimeValue timeout() {
return request.masterTimeout;
}
@Override
public void onFailure(String source, Throwable t) {
listener.onFailure(t);
}
@Override
public ClusterState execute(final ClusterState currentState) {
if (!currentState.metaData().hasConcreteIndex(request.index)) {
throw new IndexMissingException(new Index(request.index));
}
logger.info("[{}] deleting index", request.index);
RoutingTable.Builder routingTableBuilder = RoutingTable.builder(currentState.routingTable());
routingTableBuilder.remove(request.index);
MetaData newMetaData = MetaData.builder(currentState.metaData())
.remove(request.index)
.build();
RoutingAllocation.Result routingResult = allocationService.reroute(
ClusterState.builder(currentState).routingTable(routingTableBuilder).metaData(newMetaData).build());
ClusterBlocks blocks = ClusterBlocks.builder().blocks(currentState.blocks()).removeIndexBlocks(request.index).build();
// wait for events from all nodes that it has been removed from their respective metadata...
int count = currentState.nodes().size();
// add the notifications that the store was deleted from *data* nodes
count += currentState.nodes().dataNodes().size();
final AtomicInteger counter = new AtomicInteger(count);
// this listener will be notified once we get back a notification based on the cluster state change below.
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);
}
}
}
@Override
public void onNodeIndexStoreDeleted(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 ClusterState.builder(currentState).routingResult(routingResult).metaData(newMetaData).blocks(blocks).build();
}
@Override
public void clusterStateProcessed(String source, ClusterState oldState, ClusterState newState) {
}
});
}
class DeleteIndexListener implements Listener {
private final AtomicBoolean notified = new AtomicBoolean();
private final Semaphore mdLock;
private final Listener listener;
volatile ScheduledFuture<?> future;
private DeleteIndexListener(Semaphore mdLock, Listener listener) {
this.mdLock = mdLock;
this.listener = listener;
}
@Override
public void onResponse(final Response response) {
if (notified.compareAndSet(false, true)) {
mdLock.release();
if (future != null) {
future.cancel(false);
}
listener.onResponse(response);
}
}
@Override
public void onFailure(Throwable t) {
if (notified.compareAndSet(false, true)) {
mdLock.release();
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);
TimeValue masterTimeout = MasterNodeOperationRequest.DEFAULT_MASTER_NODE_TIMEOUT;
public Request(String index) {
this.index = index;
}
public Request timeout(TimeValue timeout) {
this.timeout = timeout;
return this;
}
public Request masterTimeout(TimeValue masterTimeout) {
this.masterTimeout = masterTimeout;
return this;
}
}
public static class Response {
private final boolean acknowledged;
public Response(boolean acknowledged) {
this.acknowledged = acknowledged;
}
public boolean acknowledged() {
return acknowledged;
}
}
}