| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.hadoop.yarn.server.applicationhistoryservice.metrics.loadsimulator.net; |
| |
| import java.io.IOException; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.Stopwatch; |
| |
| /** |
| * Implements MetricsSender and provides a way of pushing metrics to application metrics history service using REST |
| * endpoint. |
| */ |
| public class RestMetricsSender implements MetricsSender { |
| private final static Logger LOG = LoggerFactory.getLogger(RestMetricsSender.class); |
| |
| private final static String COLLECTOR_URL = "http://%s/ws/v1/timeline/metrics"; |
| private final String collectorServiceAddress; |
| |
| /** |
| * Creates unconnected RestMetricsSender with endpoint configured as |
| * http://${metricsHost}:6188/ws/v1/timeline/metrics, |
| * where ${metricsHost} is specified by metricHost param. |
| * |
| * @param metricsHost the hostname that will be used to access application metrics history service. |
| */ |
| public RestMetricsSender(String metricsHost) { |
| collectorServiceAddress = String.format(COLLECTOR_URL, metricsHost); |
| } |
| |
| /** |
| * Push metrics to the REST endpoint. Connection is always open and closed on every call. |
| * |
| * @param payload the payload with metrics to be sent to metrics service |
| * @return response message either acknowledgement or error, empty on exception |
| */ |
| @Override |
| public String pushMetrics(String payload) { |
| String responseString = ""; |
| UrlService svc = null; |
| Stopwatch timer = new Stopwatch().start(); |
| |
| try { |
| LOG.info("server: {}", collectorServiceAddress); |
| |
| svc = getConnectedUrlService(); |
| responseString = svc.send(payload); |
| |
| timer.stop(); |
| LOG.info("http response time: " + timer.elapsed(TimeUnit.MILLISECONDS) |
| + " ms"); |
| |
| if (responseString.length() > 0) { |
| LOG.debug("POST response from server: " + responseString); |
| } |
| } catch (IOException e) { |
| LOG.error("", e); |
| } finally { |
| if (svc != null) { |
| svc.disconnect(); |
| } |
| } |
| |
| return responseString; |
| } |
| |
| /** |
| * Relaxed to protected for testing. |
| */ |
| protected UrlService getConnectedUrlService() throws IOException { |
| return UrlService.newConnection(collectorServiceAddress); |
| } |
| |
| } |