org.elasticsearch.action.admin.indices.alias.get.TransportGetAliasesAction Maven / Gradle / Ivy
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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.action.admin.indices.alias.get;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeReadAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.AliasMetaData;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.List;
/**
*/
public class TransportGetAliasesAction extends TransportMasterNodeReadAction {
@Inject
public TransportGetAliasesAction(Settings settings, TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, GetAliasesAction.NAME, transportService, clusterService, threadPool, actionFilters, indexNameExpressionResolver, GetAliasesRequest::new);
}
@Override
protected String executor() {
// very lightweight operation all in memory no need to fork to a thread pool
return ThreadPool.Names.SAME;
}
@Override
protected ClusterBlockException checkBlock(GetAliasesRequest request, ClusterState state) {
return state.blocks().indicesBlockedException(ClusterBlockLevel.METADATA_READ, indexNameExpressionResolver.concreteIndexNames(state, request));
}
@Override
protected GetAliasesResponse newResponse() {
return new GetAliasesResponse();
}
@Override
protected void masterOperation(GetAliasesRequest request, ClusterState state, ActionListener listener) {
String[] concreteIndices = indexNameExpressionResolver.concreteIndexNames(state, request);
@SuppressWarnings("unchecked")
ImmutableOpenMap> result = (ImmutableOpenMap) state.metaData().findAliases(request.aliases(), concreteIndices);
listener.onResponse(new GetAliasesResponse(result));
}
}