001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.usage;
018
019import org.apache.activemq.broker.scheduler.JobSchedulerStore;
020
021/**
022 * Used to keep track of how much of something is being used so that a
023 * productive working set usage can be controlled. Main use case is manage
024 * memory usage.
025 *
026 * @org.apache.xbean.XBean
027 *
028 */
029public class JobSchedulerUsage extends Usage<JobSchedulerUsage> {
030
031    private JobSchedulerStore store;
032
033    public JobSchedulerUsage() {
034        super(null, null, 1.0f);
035    }
036
037    public JobSchedulerUsage(String name, JobSchedulerStore store) {
038        super(null, name, 1.0f);
039        this.store = store;
040    }
041
042    public JobSchedulerUsage(JobSchedulerUsage parent, String name) {
043        super(parent, name, 1.0f);
044        this.store = parent.store;
045    }
046
047    @Override
048    protected long retrieveUsage() {
049        if (store == null) {
050            return 0;
051        }
052        return store.size();
053    }
054
055    public JobSchedulerStore getStore() {
056        return store;
057    }
058
059    public void setStore(JobSchedulerStore store) {
060        this.store = store;
061        onLimitChange();
062    }
063}