RestIndicesSegmentsAction.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.segments;

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.segments.IndicesSegmentResponse;
import org.elasticsearch.action.admin.indices.segments.IndicesSegmentsRequest;
import org.elasticsearch.action.support.IgnoreIndices;
import org.elasticsearch.action.support.broadcast.BroadcastOperationThreading;
import org.elasticsearch.client.IndicesAdminClient;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestXContentBuilder;

import java.io.IOException;

import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestStatus.OK;
import static org.elasticsearch.rest.action.support.RestActions.buildBroadcastShardsHeader;
import static org.elasticsearch.rest.action.support.RestActions.splitIndices;

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

    @Inject
    public RestIndicesSegmentsAction(Settings settings, IndicesAdminClient client, RestController controller) {
        super(settings, client);
        controller.registerHandler(GET, "/_segments", this);
        controller.registerHandler(GET, "/{index}/_segments", this);
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel) {
        IndicesSegmentsRequest indicesSegmentsRequest = new IndicesSegmentsRequest(splitIndices(request.param("index")));
        indicesSegmentsRequest.listenerThreaded(false);
        if (request.hasParam("ignore_indices")) {
            indicesSegmentsRequest.ignoreIndices(IgnoreIndices.fromString(request.param("ignore_indices")));
        }
        BroadcastOperationThreading operationThreading = BroadcastOperationThreading.fromString(request.param("operation_threading"), BroadcastOperationThreading.SINGLE_THREAD);
        if (operationThreading == BroadcastOperationThreading.NO_THREADS) {
            // since we don't spawn, don't allow no_threads, but change it to a single thread
            operationThreading = BroadcastOperationThreading.SINGLE_THREAD;
        }
        indicesSegmentsRequest.operationThreading(operationThreading);
        client.segments(indicesSegmentsRequest, new ActionListener<IndicesSegmentResponse>() {
            @Override
            public void onResponse(IndicesSegmentResponse response) {
                try {
                    XContentBuilder builder = RestXContentBuilder.restContentBuilder(request);
                    builder.startObject();
                    builder.field("ok", true);
                    buildBroadcastShardsHeader(builder, response);
                    response.toXContent(builder, request);
                    builder.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);
                }
            }
        });
    }
}