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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.reroute;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.apache.logging.log4j.util.Supplier;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeAction;
import org.elasticsearch.cluster.AckedClusterStateUpdateTask;
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.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.cluster.routing.allocation.RoutingExplanations;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
/**
*/
public class TransportClusterRerouteAction extends TransportMasterNodeAction<ClusterRerouteRequest, ClusterRerouteResponse> {
private final AllocationService allocationService;
@Inject
public TransportClusterRerouteAction(Settings settings, TransportService transportService, ClusterService clusterService, ThreadPool threadPool,
AllocationService allocationService, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, ClusterRerouteAction.NAME, transportService, clusterService, threadPool, actionFilters, indexNameExpressionResolver, ClusterRerouteRequest::new);
this.allocationService = allocationService;
}
@Override
protected String executor() {
// we go async right away
return ThreadPool.Names.SAME;
}
@Override
protected ClusterBlockException checkBlock(ClusterRerouteRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_WRITE);
}
@Override
protected ClusterRerouteResponse newResponse() {
return new ClusterRerouteResponse();
}
@Override
protected void masterOperation(final ClusterRerouteRequest request, final ClusterState state, final ActionListener<ClusterRerouteResponse> listener) {
clusterService.submitStateUpdateTask("cluster_reroute (api)", new ClusterRerouteResponseAckedClusterStateUpdateTask(logger,
allocationService, request, listener));
}
static class ClusterRerouteResponseAckedClusterStateUpdateTask extends AckedClusterStateUpdateTask<ClusterRerouteResponse> {
private final ClusterRerouteRequest request;
private final ActionListener<ClusterRerouteResponse> listener;
private final Logger logger;
private final AllocationService allocationService;
private volatile ClusterState clusterStateToSend;
private volatile RoutingExplanations explanations;
ClusterRerouteResponseAckedClusterStateUpdateTask(Logger logger, AllocationService allocationService, ClusterRerouteRequest request,
ActionListener<ClusterRerouteResponse> listener) {
super(Priority.IMMEDIATE, request, listener);
this.request = request;
this.listener = listener;
this.logger = logger;
this.allocationService = allocationService;
}
@Override
protected ClusterRerouteResponse newResponse(boolean acknowledged) {
return new ClusterRerouteResponse(acknowledged, clusterStateToSend, explanations);
}
@Override
public void onAckTimeout() {
listener.onResponse(new ClusterRerouteResponse(false, clusterStateToSend, new RoutingExplanations()));
}
@Override
public void onFailure(String source, Exception e) {
logger.debug((Supplier<?>) () -> new ParameterizedMessage("failed to perform [{}]", source), e);
super.onFailure(source, e);
}
@Override
public ClusterState execute(ClusterState currentState) {
RoutingAllocation.Result routingResult = allocationService.reroute(currentState, request.getCommands(), request.explain(),
request.isRetryFailed());
ClusterState newState = ClusterState.builder(currentState).routingResult(routingResult).build();
clusterStateToSend = newState;
explanations = routingResult.explanations();
if (request.dryRun()) {
return currentState;
}
return newState;
}
}
}
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