| /** |
| * 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 backtype.storm.metric; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Map; |
| import java.net.URL; |
| import java.net.HttpURLConnection; |
| |
| import com.esotericsoftware.kryo.io.Output; |
| import backtype.storm.serialization.KryoValuesSerializer; |
| |
| import backtype.storm.metric.api.IMetricsConsumer; |
| import backtype.storm.task.IErrorReporter; |
| import backtype.storm.task.TopologyContext; |
| |
| /** |
| * Listens for all metrics and POSTs them serialized to a configured URL |
| * |
| * To use, add this to your topology's configuration: |
| * conf.registerMetricsConsumer(backtype.storm.metrics.HttpForwardingMetricsConsumer.class, "http://example.com:8080/metrics/my-topology/", 1); |
| * |
| * The body of the post is data serialized using backtype.storm.serialization.KryoValuesSerializer, with the data passed in |
| * as a list of [TaskInfo, Collection<DataPoint>]. More things may be appended to the end of the list in the future. |
| * |
| * The values can be deserialized using the backtype.storm.serialization.KryoValuesDeserializer, and a |
| * correct config + classpath. |
| */ |
| public class HttpForwardingMetricsConsumer implements IMetricsConsumer { |
| private transient URL _url; |
| private transient IErrorReporter _errorReporter; |
| private transient KryoValuesSerializer _serializer; |
| |
| @Override |
| public void prepare(Map stormConf, Object registrationArgument, TopologyContext context, IErrorReporter errorReporter) { |
| try { |
| _url = new URL((String)registrationArgument); |
| _errorReporter = errorReporter; |
| _serializer = new KryoValuesSerializer(stormConf); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public void handleDataPoints(TaskInfo taskInfo, Collection<DataPoint> dataPoints) { |
| try { |
| HttpURLConnection con = (HttpURLConnection)_url.openConnection(); |
| con.setRequestMethod("POST"); |
| con.setDoOutput(true); |
| Output out = new Output(con.getOutputStream()); |
| _serializer.serializeInto(Arrays.asList(taskInfo, dataPoints), out); |
| out.flush(); |
| out.close(); |
| //The connection is not sent unless a response is requested |
| int response = con.getResponseCode(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public void cleanup() { } |
| } |