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 */ 018 package org.apache.oozie.util.db; 019 020 import org.apache.commons.dbcp.BasicDataSource; 021 import org.apache.oozie.service.InstrumentationService; 022 import org.apache.oozie.service.Services; 023 import org.apache.oozie.util.Instrumentation; 024 025 public class InstrumentedBasicDataSource extends BasicDataSource { 026 public static final String INSTR_GROUP = "jdbc"; 027 public static final String INSTR_NAME = "connections.active"; 028 029 /** 030 * The created datasource instruments the active DB connections. 031 */ 032 public InstrumentedBasicDataSource() { 033 InstrumentationService instrumentationService = Services.get().get(InstrumentationService.class); 034 if (instrumentationService != null) { 035 Instrumentation instr = instrumentationService.get(); 036 instr.addSampler(INSTR_GROUP, INSTR_NAME, 60, 1, new Instrumentation.Variable<Long>() { 037 public Long getValue() { 038 return (long) getNumActive(); 039 } 040 }); 041 } 042 } 043 044 }