| /** |
| * 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.bookkeeper.stats; |
| |
| import com.codahale.metrics.health.HealthCheckRegistry; |
| import org.apache.commons.configuration.Configuration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Extend the codahale metrics provider to run servlets. |
| */ |
| public class CodahaleMetricsServletProvider extends CodahaleMetricsProvider { |
| |
| private static final Logger logger = LoggerFactory.getLogger(CodahaleMetricsServletProvider.class); |
| |
| ServletReporter servletReporter = null; |
| private final HealthCheckRegistry healthCheckRegistry = new HealthCheckRegistry(); |
| |
| @Override |
| public void start(Configuration conf) { |
| super.start(conf); |
| Integer httpPort = conf.getInteger("codahaleStatsHttpPort", null); |
| if (null != httpPort) { |
| servletReporter = new ServletReporter( |
| getMetrics(), |
| healthCheckRegistry, |
| httpPort); |
| try { |
| servletReporter.start(); |
| } catch (Exception e) { |
| logger.warn("Encountered error on starting the codahale metrics servlet", e); |
| } |
| } |
| } |
| |
| @Override |
| public void stop() { |
| if (null != servletReporter) { |
| try { |
| servletReporter.stop(); |
| } catch (Exception e) { |
| logger.error("Encountered error on stopping the codahale metrics servlet", e); |
| } |
| } |
| super.stop(); |
| } |
| } |