/*
* 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.cdap.metrics.query;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.common.conf.Constants;
import co.cask.cdap.common.hooks.MetricsReporterHook;
import co.cask.cdap.common.logging.LoggingContextAccessor;
import co.cask.cdap.common.logging.ServiceLoggingContext;
import co.cask.cdap.common.metrics.MetricsCollectionService;
import co.cask.http.HttpHandler;
import co.cask.http.NettyHttpService;
import com.google.common.collect.ImmutableList;
import com.google.common.util.concurrent.AbstractIdleService;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import org.apache.twill.common.Cancellable;
import org.apache.twill.discovery.Discoverable;
import org.apache.twill.discovery.DiscoveryService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.InetSocketAddress;
import java.util.Set;
import javax.annotation.Nullable;
/**
* Metrics implemented using the common http netty framework.
*/
public class MetricsQueryService extends AbstractIdleService {
private static final Logger LOG = LoggerFactory.getLogger(MetricsQueryService.class);
private final NettyHttpService httpService;
private final DiscoveryService discoveryService;
private Cancellable cancelDiscovery;
@Inject
public MetricsQueryService(CConfiguration cConf, @Named(Constants.Service.METRICS) Set<HttpHandler> handlers,
DiscoveryService discoveryService,
@Nullable MetricsCollectionService metricsCollectionService) {
// netty http server config
String address = cConf.get(Constants.Metrics.ADDRESS);
int backlogcnxs = cConf.getInt(Constants.Metrics.BACKLOG_CONNECTIONS, 20000);
int execthreads = cConf.getInt(Constants.Metrics.EXEC_THREADS, 20);
int bossthreads = cConf.getInt(Constants.Metrics.BOSS_THREADS, 1);
int workerthreads = cConf.getInt(Constants.Metrics.WORKER_THREADS, 10);
NettyHttpService.Builder builder = NettyHttpService.builder();
builder.addHttpHandlers(handlers);
builder.setHandlerHooks(ImmutableList.of(new MetricsReporterHook(metricsCollectionService,
Constants.Service.METRICS)));
builder.setHost(address);
builder.setConnectionBacklog(backlogcnxs);
builder.setExecThreadPoolSize(execthreads);
builder.setBossThreadPoolSize(bossthreads);
builder.setWorkerThreadPoolSize(workerthreads);
this.httpService = builder.build();
this.discoveryService = discoveryService;
LOG.info("Configuring MetricsService " +
", address: " + address +
", backlog connections: " + backlogcnxs +
", execthreads: " + execthreads +
", bossthreads: " + bossthreads +
", workerthreads: " + workerthreads);
}
@Override
protected void startUp() throws Exception {
LoggingContextAccessor.setLoggingContext(new ServiceLoggingContext(Constants.Logging.SYSTEM_NAME,
Constants.Logging.COMPONENT_NAME,
Constants.Service.METRICS));
LOG.info("Starting Metrics Service...");
httpService.startAndWait();
LOG.info("Started Metrics HTTP Service...");
// Register the service
cancelDiscovery = discoveryService.register(new Discoverable() {
@Override
public String getName() {
return Constants.Service.METRICS;
}
@Override
public InetSocketAddress getSocketAddress() {
return httpService.getBindAddress();
}
});
LOG.info("Metrics Service started successfully on {}", httpService.getBindAddress());
}
@Override
protected void shutDown() throws Exception {
LOG.info("Stopping Metrics Service...");
// Unregister the service
cancelDiscovery.cancel();
httpService.stopAndWait();
}
}