org.elasticsearch.rest.action.get.RestGetSourceAction Maven / Gradle / Ivy
/*
* Licensed to Elasticsearch 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.get;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.client.Client;
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 org.elasticsearch.search.fetch.source.FetchSourceContext;
import java.io.IOException;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestStatus.NOT_FOUND;
import static org.elasticsearch.rest.RestStatus.OK;
import static org.elasticsearch.rest.action.support.RestXContentBuilder.restContentBuilder;
/**
*
*/
public class RestGetSourceAction extends BaseRestHandler {
@Inject
public RestGetSourceAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(GET, "/{index}/{type}/{id}/_source", 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"));
getRequest.listenerThreaded(false);
getRequest.operationThreaded(true);
getRequest.refresh(request.paramAsBoolean("refresh", getRequest.refresh()));
getRequest.routing(request.param("routing")); // order is important, set it after routing, so it will set the routing
getRequest.parent(request.param("parent"));
getRequest.preference(request.param("preference"));
getRequest.realtime(request.paramAsBooleanOptional("realtime", null));
getRequest.fetchSourceContext(FetchSourceContext.parseFromRestRequest(request));
if (getRequest.fetchSourceContext() != null && !getRequest.fetchSourceContext().fetchSource()) {
try {
ActionRequestValidationException validationError = new ActionRequestValidationException();
validationError.addValidationError("fetching source can not be disabled");
channel.sendResponse(new XContentThrowableRestResponse(request, validationError));
} catch (IOException e) {
logger.error("Failed to send failure response", e);
}
}
client.get(getRequest, new ActionListener() {
@Override
public void onResponse(GetResponse response) {
try {
XContentBuilder builder = restContentBuilder(request, response.getSourceInternal());
if (!response.isExists()) {
channel.sendResponse(new XContentRestResponse(request, NOT_FOUND, builder));
} else {
RestXContentBuilder.directSource(response.getSourceInternal(), builder, request);
channel.sendResponse(new XContentRestResponse(request, OK, builder));
}
} catch (Throwable 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);
}
}
});
}
}