RestUpdateSettingsAction.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.indices.settings;

import org.elasticsearch.rest.XContentRestResponse;
import org.elasticsearch.rest.XContentThrowableRestResponse;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.settings.UpdateSettingsRequest;
import org.elasticsearch.action.admin.indices.settings.UpdateSettingsResponse;
import org.elasticsearch.client.IndicesAdminClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsException;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestXContentBuilder;

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

import static org.elasticsearch.client.AdminRequests.updateSettingsRequest;
import static org.elasticsearch.rest.RestStatus.BAD_REQUEST;
import static org.elasticsearch.rest.RestStatus.OK;
import static org.elasticsearch.rest.action.support.RestActions.splitIndices;

/**
 *
 */
public class RestUpdateSettingsAction extends BaseRestHandler<IndicesAdminClient> {

    @Inject
    public RestUpdateSettingsAction(Settings settings, IndicesAdminClient client, RestController controller) {
        super(settings, client);
        controller.registerHandler(RestRequest.Method.PUT, "/{index}/_settings", this);
        controller.registerHandler(RestRequest.Method.PUT, "/_settings", this);
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel) {
        UpdateSettingsRequest updateSettingsRequest = updateSettingsRequest(splitIndices(request.param("index")));
        updateSettingsRequest.listenerThreaded(false);

        ImmutableSettings.Builder updateSettings = ImmutableSettings.settingsBuilder();
        String bodySettingsStr = request.content().toUtf8();
        if (Strings.hasText(bodySettingsStr)) {
            try {
                Settings buildSettings = ImmutableSettings.settingsBuilder().loadFromSource(bodySettingsStr).build();
                for (Map.Entry<String, String> entry : buildSettings.getAsMap().entrySet()) {
                    String key = entry.getKey();
                    String value = entry.getValue();
                    // clean up in case the body is wrapped with "settings" : { ... }
                    if (key.startsWith("settings.")) {
                        key = key.substring("settings.".length());
                    }
                    updateSettings.put(key, value);
                }
            } catch (Exception e) {
                try {
                    channel.sendResponse(new XContentThrowableRestResponse(request, BAD_REQUEST, new SettingsException("Failed to parse index settings", e)));
                } catch (IOException e1) {
                    logger.warn("Failed to send response", e1);
                }
                return;
            }
        }
        for (Map.Entry<String, String> entry : request.params().entrySet()) {
            if (entry.getKey().equals("pretty")) {
                continue;
            }
            updateSettings.put(entry.getKey(), entry.getValue());
        }
        updateSettingsRequest.settings(updateSettings);

        client.updateSettings(updateSettingsRequest, new ActionListener<UpdateSettingsResponse>() {
            @Override
            public void onResponse(UpdateSettingsResponse updateSettingsResponse) {
                try {
                    XContentBuilder builder = RestXContentBuilder.restContentBuilder(request);
                    builder.startObject()
                            .field("ok", true)
                            .endObject();
                    channel.sendResponse(new XContentRestResponse(request, OK, builder));
                } catch (Exception e) {
                    onFailure(e);
                }
            }

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