/**
* 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.camel.builder;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.TimeUnit;
import org.apache.camel.CamelContext;
import org.apache.camel.ThreadPoolRejectedPolicy;
import org.apache.camel.model.ThreadPoolProfileDefinition;
import org.apache.camel.util.CamelContextHelper;
/**
* A builder to create thread pools.
*
* @version
*/
public final class ThreadPoolBuilder {
private final CamelContext camelContext;
private ThreadPoolProfileDefinition threadPoolDefinition;
public ThreadPoolBuilder(CamelContext camelContext) {
this.camelContext = camelContext;
// use the default thread profile as the base
this.threadPoolDefinition = new ThreadPoolProfileDefinition(camelContext.getExecutorServiceStrategy().getDefaultThreadPoolProfile());
}
public ThreadPoolBuilder poolSize(int poolSize) {
threadPoolDefinition.poolSize(poolSize);
return this;
}
public ThreadPoolBuilder maxPoolSize(int maxPoolSize) {
threadPoolDefinition.maxPoolSize(maxPoolSize);
return this;
}
public ThreadPoolBuilder keepAliveTime(long keepAliveTime) {
threadPoolDefinition.keepAliveTime(keepAliveTime);
return this;
}
public ThreadPoolBuilder timeUnit(TimeUnit timeUnit) {
threadPoolDefinition.timeUnit(timeUnit);
return this;
}
public ThreadPoolBuilder maxQueueSize(int maxQueueSize) {
threadPoolDefinition.maxQueueSize(maxQueueSize);
return this;
}
public ThreadPoolBuilder rejectedPolicy(ThreadPoolRejectedPolicy rejectedPolicy) {
threadPoolDefinition.rejectedPolicy(rejectedPolicy);
return this;
}
/**
* Builds the new thread pool
*
* @param name name which is appended to the thread name
* @return the created thread pool
* @throws Exception is thrown if error building the thread pool
*/
public ExecutorService build(String name) throws Exception {
return build(null, name);
}
/**
* Builds the new thread pool
*
* @param source the source object, usually it should be <tt>this</tt> passed in as parameter
* @param name name which is appended to the thread name
* @return the created thread pool
* @throws Exception is thrown if error building the thread pool
*/
public ExecutorService build(Object source, String name) throws Exception {
int size = CamelContextHelper.parseInteger(camelContext, threadPoolDefinition.getPoolSize());
int max = CamelContextHelper.parseInteger(camelContext, threadPoolDefinition.getMaxPoolSize());
long keepAlive = CamelContextHelper.parseLong(camelContext, threadPoolDefinition.getKeepAliveTime());
int queueSize = CamelContextHelper.parseInteger(camelContext, threadPoolDefinition.getMaxQueueSize());
TimeUnit unit = threadPoolDefinition.getTimeUnit();
RejectedExecutionHandler handler = threadPoolDefinition.getRejectedExecutionHandler();
ExecutorService answer = camelContext.getExecutorServiceStrategy().newThreadPool(source, name,
size, max, keepAlive, unit, queueSize, handler, true);
return answer;
}
}