001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.oozie.service; 019 020import org.apache.oozie.util.Instrumentation; 021import org.apache.oozie.util.MetricsInstrumentation; 022 023 024/** 025 * This service provides an {@link Instrumentation} instance mostly compatible with the original Instrumentation, but backed by 026 * Codahale Metrics. <p/> This service depends on the {@link SchedulerService}. <p/> The {@link #CONF_LOGGING_INTERVAL} 027 * configuration property indicates how often snapshots of the instrumentation should be logged. 028 */ 029public class MetricsInstrumentationService extends InstrumentationService { 030 031 private static boolean isEnabled = false; 032 033 /** 034 * Initialize the metrics instrumentation service. 035 * 036 * @param services services instance. 037 * @throws org.apache.oozie.service.ServiceException 038 */ 039 @Override 040 public void init(Services services) throws ServiceException { 041 final MetricsInstrumentation instr = new MetricsInstrumentation(); 042 int interval = services.getConf().getInt(CONF_LOGGING_INTERVAL, 60); 043 initLogging(services, instr, interval); 044 instrumentation = instr; 045 isEnabled = true; 046 } 047 048 /** 049 * Destroy the metrics instrumentation service. 050 */ 051 @Override 052 public void destroy() { 053 isEnabled = false; 054 instrumentation = null; 055 } 056 057 /** 058 * Returns if the MetricsInstrumentationService is enabled or not. 059 * 060 * @return true if the MetricsInstrumentationService is enabled; false if not 061 */ 062 public static boolean isEnabled() { 063 return isEnabled; 064 } 065}