org.apache.activemq.usage.TempUsage Maven / Gradle / Ivy
/**
* 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.activemq.usage;
import org.apache.activemq.store.PListStore;
/**
* Used to keep track of how much of something is being used so that a
* productive working set usage can be controlled. Main use case is manage
* memory usage.
*
* @org.apache.xbean.XBean
*
*/
public class TempUsage extends PercentLimitUsage {
private PListStore store;
public TempUsage() {
super(null, null, 1.0f);
}
public TempUsage(String name, PListStore store) {
super(null, name, 1.0f);
this.store = store;
updateLimitBasedOnPercent();
}
public TempUsage(TempUsage parent, String name) {
super(parent, name, 1.0f);
this.store = parent.store;
updateLimitBasedOnPercent();
}
@Override
public int getPercentUsage() {
if (store != null) {
usageLock.writeLock().lock();
try {
percentUsage = caclPercentUsage();
} finally {
usageLock.writeLock().unlock();
}
}
return super.getPercentUsage();
}
@Override
protected long retrieveUsage() {
if (store == null) {
return 0;
}
return store.size();
}
public PListStore getStore() {
return store;
}
public void setStore(PListStore store) {
this.store = store;
if (percentLimit > 0 && store != null) {
//will trigger onLimitChange
updateLimitBasedOnPercent();
} else {
onLimitChange();
}
}
@Override
protected void updateLimitBasedOnPercent() {
usageLock.writeLock().lock();
try {
percentLimitFromFile(store != null ? store.getDirectory() : null);
} finally {
usageLock.writeLock().unlock();
}
}
}