com.zonekey.ssm.common.log.queue.PeriodConsumer.java Source code

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Here is the source code for com.zonekey.ssm.common.log.queue.PeriodConsumer.java

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/**
 * Copyright (c) 2005-2009 springside.org.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * $Id$
 */
package com.zonekey.ssm.common.log.queue;

import java.util.ArrayList;
import java.util.List;

import javax.annotation.PostConstruct;

import org.springframework.util.Assert;

/**
 * ??Queue?Consumer.
 */
public abstract class PeriodConsumer extends QueueConsumer {

    protected int batchSize = 0;
    protected int period = 0;

    /**
    * ????.
    */
    public void setBatchSize(int batchSize) {
        this.batchSize = batchSize;
    }

    /**
     * ??,??.
     */
    public void setPeriod(int period) {
        this.period = period;
    }

    @PostConstruct
    public void checkSetting() {
        Assert.isTrue(batchSize > 0);
        Assert.isTrue(period > 0);
    }

    /**
     * ,???processMessageList()?.
     */
    @SuppressWarnings("unchecked")
    public void run() {
        try {
            while (!Thread.currentThread().isInterrupted()) {
                List list = new ArrayList(batchSize);
                queue.drainTo(list, batchSize);
                processMessageList(list);
                if (!Thread.currentThread().isInterrupted()) {
                    Thread.sleep(period);
                }
            }
        } catch (InterruptedException e) {
            // Ignore.
        } finally {
            //??.
            clean();
        }
    }

    /**
     * ???.
     */
    protected abstract void processMessageList(List<?> messageList);

    /**
     * ?.
     */
    protected abstract void clean();
}