/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.rest.action;
import io.crate.action.sql.*;
import io.crate.action.sql.parser.SQLXContentSourceContext;
import io.crate.action.sql.parser.SQLXContentSourceParser;
import io.crate.exceptions.SQLParseException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.*;
import java.io.PrintWriter;
import java.io.StringWriter;
public class RestSQLAction extends BaseRestHandler {
@Inject
public RestSQLAction(Settings settings, Client client, RestController controller) {
super(settings, client);
controller.registerHandler(RestRequest.Method.POST, "/_sql", this);
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel, Client client) throws Exception {
if (!request.hasContent()) {
channel.sendResponse(new CrateThrowableRestResponse(channel,
new SQLActionException("missing request body", 4000, RestStatus.BAD_REQUEST, null)));
return;
}
SQLXContentSourceContext context = new SQLXContentSourceContext();
SQLXContentSourceParser parser = new SQLXContentSourceParser(context);
try {
parser.parseSource(request.content());
} catch (SQLParseException e) {
StringWriter stackTrace = new StringWriter();
e.printStackTrace(new PrintWriter(stackTrace));
channel.sendResponse(new CrateThrowableRestResponse(channel,
new SQLActionException(e.getMessage(), 4000, RestStatus.BAD_REQUEST, stackTrace.toString())));
return;
}
Object[] args = context.args();
Object[][] bulkArgs = context.bulkArgs();
if(args != null && args.length > 0 && bulkArgs != null && bulkArgs.length > 0){
channel.sendResponse(new CrateThrowableRestResponse(channel,
new SQLActionException("request body contains args and bulk_args. It's forbidden to provide both",
4000, RestStatus.BAD_REQUEST, null)));
return;
}
if (bulkArgs != null && bulkArgs.length > 0) {
executeBulkRequest(context, request, channel, client);
} else {
executeSimpleRequest(context, request, channel, client);
}
}
private void executeSimpleRequest(SQLXContentSourceContext context, final RestRequest request, final RestChannel channel, Client client) {
final SQLRequestBuilder requestBuilder = new SQLRequestBuilder(client);
requestBuilder.stmt(context.stmt());
requestBuilder.args(context.args());
requestBuilder.includeTypesOnResponse(request.paramAsBoolean("types", false));
requestBuilder.execute(RestSQLAction.<SQLResponse>newListener(request, channel));
}
private void executeBulkRequest(SQLXContentSourceContext context, RestRequest request, RestChannel channel, Client client) {
final SQLBulkRequestBuilder requestBuilder = new SQLBulkRequestBuilder(client);
requestBuilder.stmt(context.stmt());
requestBuilder.bulkArgs(context.bulkArgs());
requestBuilder.includeTypesOnResponse(request.paramAsBoolean("types", false));
requestBuilder.execute(RestSQLAction.<SQLBulkResponse>newListener(request, channel));
}
private static <TResponse extends SQLBaseResponse> ActionListener<TResponse> newListener(
RestRequest request, RestChannel channel) {
return new SQLResponseListener<>(request, channel);
}
private static class SQLResponseListener<TResponse extends SQLBaseResponse> implements ActionListener<TResponse> {
private static final ESLogger logger = Loggers.getLogger(SQLResponseListener.class);
private final RestRequest request;
private final RestChannel channel;
public SQLResponseListener(RestRequest request, RestChannel channel) {
this.request = request;
this.channel = channel;
}
@Override
public void onResponse(TResponse tResponse) {
try {
XContentBuilder builder = channel.newBuilder();
tResponse.toXContent(builder, request);
channel.sendResponse(new BytesRestResponse(RestStatus.OK, builder));
} catch (Throwable e) {
onFailure(e);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(new CrateThrowableRestResponse(channel, e));
} catch (Throwable e1) {
logger.error("failed to send failure response", e1);
}
}
}
}