/*
* 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.action.admin.indices.exists.indices;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.action.support.master.TransportMasterNodeReadOperationAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.indices.IndexMissingException;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
/**
* Indices exists action.
*/
public class TransportIndicesExistsAction extends TransportMasterNodeReadOperationAction<IndicesExistsRequest, IndicesExistsResponse> {
@Inject
public TransportIndicesExistsAction(Settings settings, TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, ActionFilters actionFilters) {
super(settings, IndicesExistsAction.NAME, transportService, clusterService, threadPool, actionFilters);
}
@Override
protected String executor() {
// lightweight in memory check
return ThreadPool.Names.SAME;
}
@Override
protected IndicesExistsRequest newRequest() {
return new IndicesExistsRequest();
}
@Override
protected IndicesExistsResponse newResponse() {
return new IndicesExistsResponse();
}
@Override
protected ClusterBlockException checkBlock(IndicesExistsRequest request, ClusterState state) {
//make sure through indices options that the concrete indices call never throws IndexMissingException
IndicesOptions indicesOptions = IndicesOptions.fromOptions(true, true, request.indicesOptions().expandWildcardsOpen(), request.indicesOptions().expandWildcardsClosed());
return state.blocks().indicesBlockedException(ClusterBlockLevel.METADATA, clusterService.state().metaData().concreteIndices(indicesOptions, request.indices()));
}
@Override
protected void masterOperation(final IndicesExistsRequest request, final ClusterState state, final ActionListener<IndicesExistsResponse> listener) throws ElasticsearchException {
boolean exists;
try {
// Similar as the previous behaviour, but now also aliases and wildcards are supported.
clusterService.state().metaData().concreteIndices(request.indicesOptions(), request.indices());
exists = true;
} catch (IndexMissingException e) {
exists = false;
}
listener.onResponse(new IndicesExistsResponse(exists));
}
}