/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.get;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.XContentRestResponse;
import org.elasticsearch.rest.XContentThrowableRestResponse;
import java.io.IOException;
import static org.elasticsearch.rest.RestRequest.Method.*;
import static org.elasticsearch.rest.RestStatus.*;
import static org.elasticsearch.rest.action.support.RestXContentBuilder.*;
/**
* @author kimchy (Shay Banon)
*/
public class RestGetAction extends BaseRestHandler {
@Inject public RestGetAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(GET, "/{index}/{type}/{id}", this);
}
@Override public void handleRequest(final RestRequest request, final RestChannel channel) {
final GetRequest getRequest = new GetRequest(request.param("index"), request.param("type"), request.param("id"));
// no need to have a threaded listener since we just send back a response
getRequest.listenerThreaded(false);
// if we have a local operation, execute it on a thread since we don't spawn
getRequest.operationThreaded(true);
getRequest.refresh(request.paramAsBoolean("refresh", getRequest.refresh()));
getRequest.routing(request.param("routing"));
getRequest.preference(request.param("preference"));
getRequest.realtime(request.paramAsBoolean("realtime", null));
String sField = request.param("fields");
if (sField != null) {
String[] sFields = Strings.splitStringByCommaToArray(sField);
if (sFields != null) {
getRequest.fields(sFields);
}
}
client.get(getRequest, new ActionListener<GetResponse>() {
@Override public void onResponse(GetResponse response) {
try {
XContentBuilder builder = restContentBuilder(request);
response.toXContent(builder, request);
if (!response.exists()) {
channel.sendResponse(new XContentRestResponse(request, NOT_FOUND, builder));
} else {
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);
}
}
});
}
}