/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed 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 co.cask.tigon.sql.io;
import co.cask.http.AbstractHttpHandler;
import co.cask.http.HttpResponder;
import co.cask.http.NettyHttpService;
import com.google.common.collect.ImmutableList;
import com.google.common.util.concurrent.AbstractIdleService;
import org.apache.twill.common.Cancellable;
import org.apache.twill.common.ServiceListenerAdapter;
import org.apache.twill.common.Threads;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.InetSocketAddress;
import java.util.Map;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
/**
* Netty Http Service Endpoint for the Users to ingest data.
*/
public class DataIngestionRouter extends AbstractIdleService {
private static final Logger LOG = LoggerFactory.getLogger(DataIngestionRouter.class);
private final HttpRouterClientService clientService;
private int httpPort;
private NettyHttpService httpService;
public DataIngestionRouter(Map<String, InetSocketAddress> ingestionServerMap) {
this(ingestionServerMap, 0);
}
public DataIngestionRouter(Map<String, InetSocketAddress> ingestionServerMap,
int httpPort) {
this.clientService = new HttpRouterClientService(ingestionServerMap);
this.httpPort = httpPort;
}
@Override
protected void startUp() throws Exception {
httpService = NettyHttpService.builder()
.addHttpHandlers(ImmutableList.of(new ForwardingHandler(clientService)))
.setHost("0.0.0.0")
.setPort(httpPort)
.build();
httpService.addListener(new ServiceListenerAdapter() {
private Cancellable cancellable;
@Override
public void running() {
final InetSocketAddress socketAddress = httpService.getBindAddress();
LOG.info("Data Ingestion Router HTTP Service started at {}", socketAddress);
}
@Override
public void terminated(State from) {
LOG.info("Data Ingestion Router HTTP Service stopped");
if (cancellable != null) {
cancellable.cancel();
}
}
@Override
public void failed(State from, Throwable failure) {
LOG.info("Data Ingestion Router HTTP Service stopped with failure", failure);
if (cancellable != null) {
cancellable.cancel();
}
}
}, Threads.SAME_THREAD_EXECUTOR);
clientService.startAndWait();
httpService.startAndWait();
}
@Override
protected void shutDown() throws Exception {
httpService.stopAndWait();
clientService.stopAndWait();
}
public InetSocketAddress getAddress() {
return httpService.getBindAddress();
}
/**
* HTTP Endpoint handler method.
*/
@Path("/v1/tigon")
public static class ForwardingHandler extends AbstractHttpHandler {
private final HttpRouterClientService clientService;
public ForwardingHandler(HttpRouterClientService clientService) {
this.clientService = clientService;
}
@Path("{streamname}")
@POST
public void ingestData(HttpRequest request, HttpResponder responder, @PathParam("streamname") String streamName) {
//Forward the data to the correct TCP endpoint based on the stream name.
//TODO: Check if the stream name is valid and return NOT_FOUND if stream name is not present
if (clientService.sendData(streamName, request.getContent())) {
responder.sendStatus(HttpResponseStatus.OK);
return;
}
responder.sendStatus(HttpResponseStatus.INTERNAL_SERVER_ERROR);
}
}
}