readtest.java

java的共享内存管理.基于MMF设计。封装了java.nio.MappedByteBuffer.在大流量实时业务系统时

package com.bci.commons.mmf.example;

import org.apache.log4j.Logger;

import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

public class ReadTest {
	/**
	 * Logger for this class
	 */
	private static final Logger logger = Logger.getLogger(ReadTest.class);

	private static final int MAX_COUNT = 1000;

	private static CMPP3SubmitMMF map = new CMPP3SubmitMMF();

	public static ThreadPoolExecutor pool = new ThreadPoolExecutor(100, 100,
			50000L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>());

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		class Reader implements Runnable {

			private int pos = 0;

			public Reader(int _pos) {
				this.pos = _pos;
			}

			public void run() {
				logger.info(Thread.currentThread().getId()
						+ "__reading data:pos=" + pos);
				long ss = map.readLong(pos + 113);
				logger.info(Thread.currentThread().getId() + "__value=" + ss);
			}

		}
		org.apache.log4j.PropertyConfigurator
				.configure("config/mtci_log4j.properties");
		map.load("data/deliver_test", MAX_COUNT);
		for (int x = 0; x < 100; x++)
			for (int i = 0; i < MAX_COUNT; i++) {
				pool.execute(new Reader(i));
			}

		while (pool.getActiveCount() > 0)
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		pool.shutdown();
	}

}