org.springframework.scheduling.quartz.LocalTaskExecutorThreadPool Maven / Gradle / Ivy
/*
* Copyright 2002-2006 the original author or authors.
*
* Licensed 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.springframework.scheduling.quartz;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.quartz.SchedulerConfigException;
import org.quartz.spi.ThreadPool;
import org.springframework.core.task.TaskExecutor;
import org.springframework.core.task.TaskRejectedException;
/**
* Quartz ThreadPool adapter that delegates to a Spring-managed
* TaskExecutor instance, specified on SchedulerFactoryBean.
*
* @author Juergen Hoeller
* @since 2.0
* @see SchedulerFactoryBean#setTaskExecutor
*/
public class LocalTaskExecutorThreadPool implements ThreadPool {
/** Logger available to subclasses */
protected final Log logger = LogFactory.getLog(getClass());
private TaskExecutor taskExecutor;
public void initialize() throws SchedulerConfigException {
// Absolutely needs thread-bound TaskExecutor to initialize.
this.taskExecutor = SchedulerFactoryBean.getConfigTimeTaskExecutor();
if (this.taskExecutor == null) {
throw new SchedulerConfigException(
"No local TaskExecutor found for configuration - " +
"'taskExecutor' property must be set on SchedulerFactoryBean");
}
}
public void shutdown(boolean waitForJobsToComplete) {
}
public int getPoolSize() {
return -1;
}
public boolean runInThread(Runnable runnable) {
if (runnable == null) {
return false;
}
try {
this.taskExecutor.execute(runnable);
return true;
}
catch (TaskRejectedException ex) {
logger.error("Task has been rejected by TaskExecutor", ex);
return false;
}
}
public int blockForAvailableThreads() {
// The present implementation always returns 1, making Quartz (1.6)
// always schedule any tasks that it feels like scheduling.
// This could be made smarter for specific TaskExecutors,
// for example calling getMaximumPoolSize() - getActiveCount()
// on a java.util.concurrent.ThreadPoolExecutor.
return 1;
}
}