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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.MasterNodeRequest;
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.common.util.concurrent.FutureUtils;
import org.elasticsearch.index.IndexNotFoundException;
import org.elasticsearch.threadpool.ThreadPool;
import java.util.Arrays;
import java.util.Collection;
import java.util.concurrent.ScheduledFuture;
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;
@Inject
public MetaDataDeleteIndexService(Settings settings, ThreadPool threadPool, ClusterService clusterService, AllocationService allocationService,
NodeIndexDeletedAction nodeIndexDeletedAction) {
super(settings);
this.threadPool = threadPool;
this.clusterService = clusterService;
this.allocationService = allocationService;
this.nodeIndexDeletedAction = nodeIndexDeletedAction;
}
public void deleteIndices(final Request request, final Listener userListener) {
final Collection indices = Arrays.asList(request.indices);
final DeleteIndexListener listener = new DeleteIndexListener(userListener);
clusterService.submitStateUpdateTask("delete-index " + indices, new ClusterStateUpdateTask(Priority.URGENT) {
@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) {
RoutingTable.Builder routingTableBuilder = RoutingTable.builder(currentState.routingTable());
MetaData.Builder metaDataBuilder = MetaData.builder(currentState.metaData());
ClusterBlocks.Builder clusterBlocksBuilder = ClusterBlocks.builder().blocks(currentState.blocks());
for (final String index: indices) {
if (!currentState.metaData().hasConcreteIndex(index)) {
throw new IndexNotFoundException(index);
}
logger.debug("[{}] deleting index", index);
routingTableBuilder.remove(index);
clusterBlocksBuilder.removeIndexBlocks(index);
metaDataBuilder.remove(index);
}
// 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 * indices.size());
// 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 deleted, String nodeId) {
if (indices.contains(deleted)) {
if (counter.decrementAndGet() == 0) {
listener.onResponse(new Response(true));
nodeIndexDeletedAction.remove(this);
}
}
}
@Override
public void onNodeIndexStoreDeleted(String deleted, String nodeId) {
if (indices.contains(deleted)) {
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);
}
});
MetaData newMetaData = metaDataBuilder.build();
ClusterBlocks blocks = clusterBlocksBuilder.build();
RoutingAllocation.Result routingResult = allocationService.reroute(
ClusterState.builder(currentState).routingTable(routingTableBuilder.build()).metaData(newMetaData).build(),
"deleted indices [" + indices + "]");
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 Listener listener;
volatile ScheduledFuture future;
private DeleteIndexListener(Listener listener) {
this.listener = listener;
}
@Override
public void onResponse(final Response response) {
if (notified.compareAndSet(false, true)) {
FutureUtils.cancel(future);
listener.onResponse(response);
}
}
@Override
public void onFailure(Throwable t) {
if (notified.compareAndSet(false, true)) {
FutureUtils.cancel(future);
listener.onFailure(t);
}
}
}
public interface Listener {
void onResponse(Response response);
void onFailure(Throwable t);
}
public static class Request {
final String[] indices;
TimeValue timeout = TimeValue.timeValueSeconds(10);
TimeValue masterTimeout = MasterNodeRequest.DEFAULT_MASTER_NODE_TIMEOUT;
public Request(String[] indices) {
this.indices = indices;
}
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;
}
}
}