Spring 郵件羣發,隊列機制
<1>
package com.cofortune.zhengjia.common.utils;
import java.io.InputStream;
import javax.mail.internet.MimeMessage;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.mail.MailException;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessagePreparator;
public class MailSenderPooled implements MailSender, JavaMailSender, Runnable {
protected final Log log = LogFactory.getLog(getClass());
// -------------------------------------------------------------------------
/**
* 實際發送郵件的郵件發送器,可以是MailSender,或JavaMailSender
*/
private MailSender mailSender;
// -------------------------------------------------------------------------
/**
* 郵件排隊點號、發送線程,
*/
private Thread thread;
/**
* 郵件排隊隊列
*/
private Queue queue = new Queue();
/**
* 鎖,僅此而已
*
* @see #run()
* @see #add(Object)
*/
private Object mutex = new Object();
// -------------------------------------------------------------------------
/**
* 構造本類對象,同時啓動偵聽郵件的到達。
*
* 如果要阻止偵聽和發送,應該調用close方法,在Spring的Context中"最好"配置destroy-method="close",不過這不是必須的。
*
*/
public MailSenderPooled() {
thread = new Thread(this);
thread.setDaemon(true);
thread.start();
}
// -------------------------------------------------------------------------
/**
* 郵件發送循環,它被作爲thread runnable的run實現。
*
* @see #add(Object)
*
*/
public void run() {
while (!isClose()) {
if (!isEmpty()) {
Object object = poll();
try {
// 執行實際發送
doSend(object);
} catch (Exception ex) {
log.error(ex);
ex.printStackTrace();
}
}
// 等~直到add方法的通知!
synchronized (mutex) {
try {
mutex.wait();
} catch (InterruptedException e) {
}
}
}
}
// -------------------------------------------------------------------------
public MailSender getMailSender() {
return mailSender;
}
/**
* 設置實際的郵件發送器
*
* @param mailSender
*/
public void setMailSender(MailSender mailSender) {
this.mailSender = mailSender;
}
// -------------------------------------------------------------------------
/**
* 關閉PooledMailSender!
*
* 關閉的PooledMailSender不可再接收和發送郵件
*/
public void close() {
queue.clear();
queue = null;
}
/**
* 已經關閉?
*
* 關閉的PooledMailSender不可再接收和發送郵件
*
* @return
*/
public boolean isClose() {
return queue == null;
}
// -------------------------------------------------------------------------
// 郵件排隊機操作方法代理
protected boolean isEmpty() {
return queue != null && queue.isEmpty();
}
/**
* 郵件加入排隊機
*
* @param obj
* @see #run()
*/
protected void add(Object obj) {
queue.add(obj);
synchronized (mutex) {
mutex.notify();
}
}
protected Object poll() {
return queue.poll();
}
// -------------------------------------------------------------------------
// MailSender接口實現-將郵件放入排隊機
public void send(SimpleMailMessage simpleMessage) throws MailException {
add(simpleMessage);
}
public void send(SimpleMailMessage[] simpleMessages) throws MailException {
SimpleMailMessage[] messages = simpleMessages;
for (int i = 0; i < messages.length; i++) {
SimpleMailMessage message = messages[i];
add(message);
}
}
// -------------------------------------------------------------------------
// // // JavaMailSender接口實現-將郵件放入排隊機
public void send(MimeMessage mimeMessage) throws MailException {
add(mimeMessage);
}
public void send(MimeMessage[] mimeMessages) throws MailException {
MimeMessage[] messages = mimeMessages;
for (int i = 0; i < messages.length; i++) {
MimeMessage message = messages[i];
add(message);
}
}
public void send(MimeMessagePreparator mimeMessagePreparator)
throws MailException {
add(mimeMessagePreparator);
}
public void send(MimeMessagePreparator[] mimeMessagePreparators)
throws MailException {
MimeMessagePreparator[] preparators = mimeMessagePreparators;
for (int i = 0; i < preparators.length; i++) {
MimeMessagePreparator preparator = preparators[i];
add(preparator);
}
}
public MimeMessage createMimeMessage() {
return ((JavaMailSender) mailSender).createMimeMessage();
}
public MimeMessage createMimeMessage(InputStream contentStream)
throws MailException {
return ((JavaMailSender) mailSender).createMimeMessage(contentStream);
}
// -------------------------------------------------------------------------
// 實際發送代理方法
public void doSend(Object object) {
if (object instanceof SimpleMailMessage) {
doSend((SimpleMailMessage) object);
} else if (object instanceof MimeMessage) {
doSend((MimeMessage) object);
} else if (object instanceof MimeMessagePreparator) {
doSend((MimeMessagePreparator) object);
}
}
public void doSend(SimpleMailMessage simpleMessage) throws MailException {
mailSender.send(simpleMessage);
}
public void doSend(MimeMessage mimeMessage) throws MailException {
((JavaMailSender) mailSender).send(mimeMessage);
}
public void doSend(MimeMessagePreparator mimeMessagePreparator)
throws MailException {
((JavaMailSender) mailSender).send(mimeMessagePreparator);
}
}
<2>
package com.cofortune.zhengjia.common.utils;
import java.util.LinkedList;
import java.util.List;
public class Queue {
private static Queue queue = new Queue();
private List list;
public static final int SIZE = 10;
public Queue() {
list = new LinkedList();
}
public static Queue getInstance() {
return queue;
}
public boolean isFull() {
return list.size() == SIZE;
}
public void add(Object obj) {
list.add(obj);
}
public Object poll() {
return (Object) list.remove(0);
}
public boolean isEmpty() {
return list.isEmpty();
}
public void clear(){
list.clear();
}
}
本文來自CSDN博客,轉載請標明出處:http://blog.csdn.net/xymyeah/archive/2007/08/29/1763382.aspx