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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.cluster.state;
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.ClusterName;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.metadata.MetaData.Custom;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
/**
*
*/
public class TransportClusterStateAction extends TransportMasterNodeReadAction<ClusterStateRequest, ClusterStateResponse> {
private final ClusterName clusterName;
@Inject
public TransportClusterStateAction(Settings settings, TransportService transportService, ClusterService clusterService, ThreadPool threadPool,
ClusterName clusterName, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, ClusterStateAction.NAME, transportService, clusterService, threadPool, actionFilters, indexNameExpressionResolver, ClusterStateRequest::new);
this.clusterName = clusterName;
}
@Override
protected String executor() {
// very lightweight operation in memory, no need to fork to a thread
return ThreadPool.Names.SAME;
}
@Override
protected ClusterBlockException checkBlock(ClusterStateRequest request, ClusterState state) {
// cluster state calls are done also on a fully blocked cluster to figure out what is going
// on in the cluster. For example, which nodes have joined yet the recovery has not yet kicked
// in, we need to make sure we allow those calls
// return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA);
return null;
}
@Override
protected ClusterStateResponse newResponse() {
return new ClusterStateResponse();
}
@Override
protected void masterOperation(final ClusterStateRequest request, final ClusterState state, ActionListener<ClusterStateResponse> listener) {
ClusterState currentState = clusterService.state();
logger.trace("Serving cluster state request using version {}", currentState.version());
ClusterState.Builder builder = ClusterState.builder(currentState.getClusterName());
builder.version(currentState.version());
builder.stateUUID(currentState.stateUUID());
if (request.nodes()) {
builder.nodes(currentState.nodes());
}
if (request.routingTable()) {
if (request.indices().length > 0) {
RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
for (String filteredIndex : request.indices()) {
if (currentState.routingTable().getIndicesRouting().containsKey(filteredIndex)) {
routingTableBuilder.add(currentState.routingTable().getIndicesRouting().get(filteredIndex));
}
}
builder.routingTable(routingTableBuilder.build());
} else {
builder.routingTable(currentState.routingTable());
}
}
if (request.blocks()) {
builder.blocks(currentState.blocks());
}
if (request.metaData()) {
MetaData.Builder mdBuilder;
if (request.indices().length == 0) {
mdBuilder = MetaData.builder(currentState.metaData());
} else {
mdBuilder = MetaData.builder();
}
if (request.indices().length > 0) {
String[] indices = indexNameExpressionResolver.concreteIndices(currentState, request);
for (String filteredIndex : indices) {
IndexMetaData indexMetaData = currentState.metaData().index(filteredIndex);
if (indexMetaData != null) {
mdBuilder.put(indexMetaData, false);
}
}
}
// Filter our metadata that shouldn't be returned by API
for(ObjectObjectCursor<String, Custom> custom : currentState.metaData().customs()) {
if(!custom.value.context().contains(MetaData.XContentContext.API)) {
mdBuilder.removeCustom(custom.key);
}
}
builder.metaData(mdBuilder);
}
if (request.customs()) {
builder.customs(currentState.customs());
}
listener.onResponse(new ClusterStateResponse(clusterName, builder.build()));
}
}
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