RestDeleteAction.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.delete;

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.WriteConsistencyLevel;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.support.replication.ReplicationType;
import org.elasticsearch.client.IngestClient;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentBuilderString;
import org.elasticsearch.index.VersionType;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestActions;
import org.elasticsearch.rest.action.support.RestXContentBuilder;

import java.io.IOException;

import static org.elasticsearch.rest.RestRequest.Method.DELETE;
import static org.elasticsearch.rest.RestStatus.NOT_FOUND;
import static org.elasticsearch.rest.RestStatus.OK;

/**
 *
 */
public class RestDeleteAction extends BaseRestHandler<IngestClient> {

    @Inject
    public RestDeleteAction(Settings settings, IngestClient client, RestController controller) {
        super(settings, client);
        controller.registerHandler(DELETE, "/{index}/{type}/{id}", this);
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel) {
        DeleteRequest deleteRequest = new DeleteRequest(request.param("index"), request.param("type"), request.param("id"));

        deleteRequest.listenerThreaded(false);
        deleteRequest.operationThreaded(true);

        deleteRequest.parent(request.param("parent"));
        deleteRequest.routing(request.param("routing"));
        deleteRequest.timeout(request.paramAsTime("timeout", DeleteRequest.DEFAULT_TIMEOUT));
        deleteRequest.refresh(request.paramAsBoolean("refresh", deleteRequest.refresh()));
        deleteRequest.version(RestActions.parseVersion(request));
        deleteRequest.versionType(VersionType.fromString(request.param("version_type"), deleteRequest.versionType()));

        String replicationType = request.param("replication");
        if (replicationType != null) {
            deleteRequest.replicationType(ReplicationType.fromString(replicationType));
        }
        String consistencyLevel = request.param("consistency");
        if (consistencyLevel != null) {
            deleteRequest.consistencyLevel(WriteConsistencyLevel.fromString(consistencyLevel));
        }

        client.delete(deleteRequest, new ActionListener<DeleteResponse>() {
            @Override
            public void onResponse(DeleteResponse result) {
                try {
                    XContentBuilder builder = RestXContentBuilder.restContentBuilder(request);
                    builder.startObject()
                            .field(Fields.OK, true)
                            .field(Fields.FOUND, !result.notFound())
                            .field(Fields._INDEX, result.index())
                            .field(Fields._TYPE, result.type())
                            .field(Fields._ID, result.id())
                            .field(Fields._VERSION, result.version())
                            .endObject();
                    RestStatus status = OK;
                    if (result.notFound()) {
                        status = NOT_FOUND;
                    }
                    channel.sendResponse(new XContentRestResponse(request, status, 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);
                }
            }
        });
    }

    static final class Fields {
        static final XContentBuilderString OK = new XContentBuilderString("ok");
        static final XContentBuilderString FOUND = new XContentBuilderString("found");
        static final XContentBuilderString _INDEX = new XContentBuilderString("_index");
        static final XContentBuilderString _TYPE = new XContentBuilderString("_type");
        static final XContentBuilderString _ID = new XContentBuilderString("_id");
        static final XContentBuilderString _VERSION = new XContentBuilderString("_version");
    }
}