package cn.com.qmth.multithread;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.apache.log4j.Logger;



public  class  Basket {
    private static Logger logger = Logger.getLogger(Basket.class);
	/**
	 * 数据阻塞队列
	 */
	private BlockingQueue<Object> queue;
	
	/**
	 * 多线程计数器，子线程都结束后主线程才继续执行
	 */
	private CountDownLatch endGate;
	
	/**
	 * 消费者数量
	 */
	private int consumerCount;
	
	
	/**
	 * 判断线程执行是否有出错，生产者、消费者出错都需要修改此值为true
	 */
	private boolean isExcuteError = false;
	
	
	public Basket(int consumerCount) {
		this.consumerCount=consumerCount;
		queue = new ArrayBlockingQueue<Object>(consumerCount*2);
		endGate = new CountDownLatch(consumerCount);
	}

	/**
	 * 生产数据，不采用put方法防止消费线程全部异常后生产线程阻塞
	 * @param value
	 * @throws InterruptedException
	 */
	protected void offer(final Object value) throws InterruptedException {
		if(isExcuteError) {
			logger.error("**********************offer isExcuteError threadId:"+Thread.currentThread().getId());
			throw new StatusException("1000001","线程异常");
		}else {
			boolean ret=queue.offer(value, 1, TimeUnit.MINUTES);
			if(!ret) {
//				logger.info("**********************offer time out threadId:"+Thread.currentThread().getId()+value);
				this.offer(value);
			}
		}
	}
	/**
	 * 消费数据，不采用take方法防止生产线程全部异常后消费线程阻塞
	 * @return
	 * @throws InterruptedException
	 */
	protected Object consume() throws InterruptedException {
		if(isExcuteError) {
			logger.error("**********************poll isExcuteError  threadId:"+Thread.currentThread().getId());
			return new EndObject();
		}else {
			Object ob=queue.poll(1, TimeUnit.MINUTES);
			if(ob==null) {
//				logger.info("**********************poll time out  threadId:"+Thread.currentThread().getId());
				return this.consume();
			}else {
				return ob;
			}
		}
	}
	
	protected void await() throws InterruptedException {
		endGate.await();
	}
	protected void countDown() {
		endGate.countDown();
	}

	protected boolean isExcuteError() {
		return isExcuteError;
	}

	protected void setExcuteError(boolean isExcuteError) {
		this.isExcuteError = isExcuteError;
	}

	protected int getConsumerCount() {
		return consumerCount;
	}

	protected void setConsumerCount(int consumerCount) {
		this.consumerCount = consumerCount;
	}

}