/* * 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.action.ActionListener; import org.elasticsearch.action.support.ActionFilters; import org.elasticsearch.action.support.IndicesOptions; 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.IndexNameExpressionResolver; import org.elasticsearch.cluster.service.ClusterService; import org.elasticsearch.common.inject.Inject; import org.elasticsearch.common.settings.Settings; import org.elasticsearch.index.IndexNotFoundException; import org.elasticsearch.threadpool.ThreadPool; import org.elasticsearch.transport.TransportService; /** * Indices exists action. */ public class TransportIndicesExistsAction extends TransportMasterNodeReadAction<IndicesExistsRequest, IndicesExistsResponse> { @Inject public TransportIndicesExistsAction(Settings settings, TransportService transportService, ClusterService clusterService, ThreadPool threadPool, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) { super(settings, IndicesExistsAction.NAME, transportService, clusterService, threadPool, actionFilters, indexNameExpressionResolver, IndicesExistsRequest::new); } @Override protected String executor() { // lightweight in memory check return ThreadPool.Names.SAME; } @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_READ, indexNameExpressionResolver.concreteIndexNames(state, indicesOptions, request.indices())); } @Override protected void masterOperation(final IndicesExistsRequest request, final ClusterState state, final ActionListener<IndicesExistsResponse> listener) { boolean exists; try { // Similar as the previous behaviour, but now also aliases and wildcards are supported. indexNameExpressionResolver.concreteIndexNames(state, request); exists = true; } catch (IndexNotFoundException e) { exists = false; } listener.onResponse(new IndicesExistsResponse(exists)); } }