/*
* 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.template.get;
import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeReadAction;
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.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.metadata.IndexTemplateMetaData;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
*
*/
public class TransportGetIndexTemplatesAction extends TransportMasterNodeReadAction<GetIndexTemplatesRequest, GetIndexTemplatesResponse> {
@Inject
public TransportGetIndexTemplatesAction(Settings settings, TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, GetIndexTemplatesAction.NAME, transportService, clusterService, threadPool, actionFilters, indexNameExpressionResolver, GetIndexTemplatesRequest.class);
}
@Override
protected String executor() {
return ThreadPool.Names.SAME;
}
@Override
protected ClusterBlockException checkBlock(GetIndexTemplatesRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_READ);
}
@Override
protected GetIndexTemplatesResponse newResponse() {
return new GetIndexTemplatesResponse();
}
@Override
protected void masterOperation(GetIndexTemplatesRequest request, ClusterState state, ActionListener<GetIndexTemplatesResponse> listener) {
List<IndexTemplateMetaData> results;
// If we did not ask for a specific name, then we return all templates
if (request.names().length == 0) {
results = Arrays.asList(state.metaData().templates().values().toArray(IndexTemplateMetaData.class));
} else {
results = new ArrayList<>();
}
for (String name : request.names()) {
if (Regex.isSimpleMatchPattern(name)) {
for (ObjectObjectCursor<String, IndexTemplateMetaData> entry : state.metaData().templates()) {
if (Regex.simpleMatch(name, entry.key)) {
results.add(entry.value);
}
}
} else if (state.metaData().templates().containsKey(name)) {
results.add(state.metaData().templates().get(name));
}
}
listener.onResponse(new GetIndexTemplatesResponse(results));
}
}