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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.cayenne.datasource;
/**
* A thread that manages the state of a {@link UnmanagedPoolingDataSource} instance,
* performing periodic expansion/contraction of pooled connections, and
* orchestrating shutdown.
*
* @since 4.0
*/
class PoolingDataSourceManager extends Thread {
private volatile boolean shouldStop;
private UnmanagedPoolingDataSource dataSource;
private long managerWakeTime;
PoolingDataSourceManager(UnmanagedPoolingDataSource dataSource, long managerWakeTime) {
setName("PoolingDataSourceManager-" + dataSource.hashCode());
setDaemon(true);
this.dataSource = dataSource;
this.shouldStop = false;
this.managerWakeTime = managerWakeTime;
}
void shutdown() {
shouldStop = true;
dataSource.close();
interrupt();
}
UnmanagedPoolingDataSource getDataSource() {
return dataSource;
}
boolean isStopped() {
return shouldStop;
}
@Override
public void run() {
while (true) {
try {
Thread.sleep(managerWakeTime);
} catch (InterruptedException iex) {
// ignore...
}
if (shouldStop) {
break;
}
dataSource.managePool();
}
}
}