/*
* 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.process;
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.base.Objects;
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;
/**
* MetricsProcessorStatusService with PingHandler used for discovery during CDAP-services startup.
*/
public class MetricsProcessorStatusService extends AbstractIdleService {
private static final Logger LOG = LoggerFactory.getLogger(MetricsProcessorStatusService.class);
private final DiscoveryService discoveryService;
private final NettyHttpService httpService;
private Cancellable cancellable;
@Inject
public MetricsProcessorStatusService (CConfiguration cConf, DiscoveryService discoveryService,
@Named(Constants.MetricsProcessor.METRICS_PROCESSOR_STATUS_HANDLER)
Set<HttpHandler> handlers,
MetricsCollectionService metricsCollectionService) {
this.discoveryService = discoveryService;
this.httpService = NettyHttpService.builder()
.addHttpHandlers(handlers)
.setHandlerHooks(ImmutableList.of(new MetricsReporterHook(metricsCollectionService,
Constants.MetricsProcessor.METRICS_PROCESSOR_STATUS_HANDLER)))
.setHost(cConf.get(Constants.MetricsProcessor.ADDRESS))
.build();
}
@Override
protected void startUp() throws Exception {
LoggingContextAccessor.setLoggingContext(new ServiceLoggingContext(Constants.Logging.SYSTEM_NAME,
Constants.Logging.COMPONENT_NAME,
Constants.Service.METRICS_PROCESSOR));
httpService.startAndWait();
LOG.info("MetricsProcessor Service started");
cancellable = discoveryService.register(new Discoverable() {
@Override
public String getName() {
return Constants.Service.METRICS_PROCESSOR;
}
@Override
public InetSocketAddress getSocketAddress() {
return httpService.getBindAddress();
}
});
}
@Override
protected void shutDown() throws Exception {
try {
if (cancellable != null) {
cancellable.cancel();
}
} finally {
httpService.stopAndWait();
LOG.info("Metrics Processor Service Stopped");
}
}
@Override
public String toString() {
return Objects.toStringHelper(this)
.add("bindAddress", httpService.getBindAddress())
.toString();
}
}