RestClusterUpdateSettingsAction.java

/*
 * Licensed to ElasticSearch and Shay Banon 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.rest.action.admin.cluster.settings;

import org.elasticsearch.rest.XContentThrowableRestResponse;
import org.elasticsearch.rest.StringRestResponse;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsResponse;
import org.elasticsearch.client.ClusterAdminClient;
import org.elasticsearch.client.AdminRequests;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.rest.*;

import java.io.IOException;
import java.util.Map;

/**
 */
public class RestClusterUpdateSettingsAction extends BaseRestHandler<ClusterAdminClient> {

    @Inject
    public RestClusterUpdateSettingsAction(Settings settings, ClusterAdminClient client, RestController controller) {
        super(settings, client);
        controller.registerHandler(RestRequest.Method.PUT, "/_cluster/settings", this);
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel) {
        final ClusterUpdateSettingsRequest clusterUpdateSettingsRequest = AdminRequests.clusterUpdateSettingsRequest();
        clusterUpdateSettingsRequest.listenerThreaded(false);
        try {
            Map<String, Object> source = XContentFactory.xContent(request.content()).createParser(request.content()).mapAndClose();
            if (source.containsKey("transient")) {
                clusterUpdateSettingsRequest.transientSettings((Map) source.get("transient"));
            }
            if (source.containsKey("persistent")) {
                clusterUpdateSettingsRequest.persistentSettings((Map) source.get("persistent"));
            }
        } catch (Exception e) {
            try {
                channel.sendResponse(new XContentThrowableRestResponse(request, e));
            } catch (IOException e1) {
                logger.warn("Failed to send response", e1);
            }
            return;
        }

        client.updateSettings(clusterUpdateSettingsRequest, new ActionListener<ClusterUpdateSettingsResponse>() {
            @Override
            public void onResponse(ClusterUpdateSettingsResponse response) {
                try {
                    channel.sendResponse(new StringRestResponse(RestStatus.OK));
                } catch (Exception e) {
                    onFailure(e);
                }
            }

            @Override
            public void onFailure(Throwable e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("failed to handle cluster state", e);
                }
                try {
                    channel.sendResponse(new XContentThrowableRestResponse(request, e));
                } catch (IOException e1) {
                    logger.error("Failed to send failure response", e1);
                }
            }
        });
    }
}