transactionid.java

来自「JAVA解析MSNP15协议」· Java 代码 · 共 38 行

package jm.framework.msn.entity;

/**
 * 队列编号
 * 梦界家园MSNP15
 * @author ISHome
 * @since 0.5.0.1
 * @version 0.1
 */
public class TransactionId {
	private static TransactionId instance = null;
		
	public static TransactionId getInstance(){
		if (instance == null){
			instance = new TransactionId();
		}
		return instance;
	}

    private int trId = 0;

    /**
     * 获得队列编号
     * @return
     */
    public synchronized int nextTransactionId() {
        trId++;
        if (trId < 0) //Bigger than Integer.MAX_VALUE
            trId = 1;
        return trId;
    }

    @Override
	public String toString() {
        return ""+trId;
    }
}