JBPM3 邮件发送 终极解决办法

   作为一个工作流，能进行提醒，是一个基本功能。但是作为一个开源产品，JBPM3似乎做得不好，很有鸡肋的感觉，吃起来不好吃，扔了又可惜。现在把结局方案发过来。不过这里要感谢的javaeye另一位大牛的文章。后面有备注。
    1.  

<?xml version="1.0" encoding="UTF-8"?>

<process-definition  xmlns=""  name="mail">
<start-state name="start-state1">
		<transition to="mail-node1"></transition>
	</start-state>
	<mail-node name="mail-node1" template="test">
		<event type="node-enter">
			<script>
				print(&quot;enter mail node&quot;)
			</script>
		</event>
		<event type="node-leave">
			<script>
				print(&quot;leave mail node&quot;)
			</script>
		</event>
		<transition to="end-state1"></transition>
	</mail-node>
	<end-state name="end-state1"></end-state>
</process-definition>

这是processdefinition.xml
然后是:

<jbpm-configuration>
	<string name="jbpm.mail.smtp.host" value="smtp.163.com" />
	<bean name="jbpm.mail.address.resolver" class="com.whqhoo.mail.TestMail"
		singleton="true" />
	<string name="mail.class.name" value="com.whqhoo.utils.Mail" />
	<string name="jbpm.mail.from.address" value="[email protected]" />
	<string name='resource.mail.properties' value='jbpm.mail.properties' />
</jbpm-configuration>

jbpm.cfg.xml
要新建一个properties

mail.smtp.host=smtp.163.com
mail.smtp.port=25
mail.smtp.user=你的用户名
mail.smtp.password=你的密码
mail.smtp.ssl=true
mail.smtp.auth=true

package com.whqhoo.utils;

import java.io.InputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;

import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.Authenticator;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jbpm.JbpmConfiguration;
import org.jbpm.JbpmException;
import org.jbpm.graph.def.ActionHandler;
import org.jbpm.graph.exe.ExecutionContext;
import org.jbpm.jpdl.el.ELException;
import org.jbpm.jpdl.el.VariableResolver;
import org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator;
import org.jbpm.mail.AddressResolver;
import org.jbpm.util.ClassLoaderUtil;
import org.jbpm.util.XmlUtil;

public class Mail implements ActionHandler {

  private static final long serialVersionUID = 1L;
  
  String template = null;
  String actors = null;
  String to = null;
  String bcc = null;
  String bccActors = null;
  String subject = null;
  String text = null;
  
  ExecutionContext executionContext = null;
  
  public Mail() {
  }

  public Mail(String template,
              String actors,
              String to,
              String subject,
              String text) {
    this.template = template;
    this.actors = actors;
    this.to = to;
    this.subject = subject;
    this.text = text;
  }
  
  public Mail(String template,
      String actors,
      String to,
      String bccActors,
      String bcc,
      String subject,
      String text) {
    this.template = template;
    this.actors = actors;
    this.to = to;
    this.bccActors = bccActors;
    this.bcc = bcc;
    this.subject = subject;
    this.text = text;
  }  
  
  public void execute(ExecutionContext executionContext) {
    this.executionContext = executionContext;
    send();
  }

  public List getRecipients() {
    List recipients = new ArrayList();
    if (actors!=null) {
      String evaluatedActors = evaluate(actors);
      List tokenizedActors = tokenize(evaluatedActors);
      if (tokenizedActors!=null) {
        recipients.addAll(resolveAddresses(tokenizedActors));
      }
    }
    if (to!=null) {
      String resolvedTo = evaluate(to);
      recipients.addAll(tokenize(resolvedTo));
    }
    return recipients;
  }

  public List getBccRecipients() {
    List recipients = new ArrayList();
    if (bccActors!=null) {
      String evaluatedActors = evaluate(bccActors);
      List tokenizedActors = tokenize(evaluatedActors);
      if (tokenizedActors!=null) {
        recipients.addAll(resolveAddresses(tokenizedActors));
      }
    }
    if (bcc!=null) {
      String resolvedTo = evaluate(to);
      recipients.addAll(tokenize(resolvedTo));
    }
    if (JbpmConfiguration.Configs.hasObject("jbpm.mail.bcc.address")) {
      recipients.addAll(tokenize(
          JbpmConfiguration.Configs.getString("jbpm.mail.bcc.address")));
    }
    return recipients;
  }
  
  public String getSubject() {
    if (subject==null) return null;
    return evaluate(subject);
  }

  public String getText() {
    if (text==null) return null;
    return evaluate(text);
  }

  public String getFromAddress() {
    if (JbpmConfiguration.Configs.hasObject("jbpm.mail.from.address")) {
      return JbpmConfiguration.Configs.getString("jbpm.mail.from.address");
    } 
    return "jbpm@noreply";
  }

  public void send() {
    if (template!=null) {
      Properties properties = getMailTemplateProperties(template);
      if (actors==null) {
        actors = properties.getProperty("actors");
      }
      if (to==null) {
        to = properties.getProperty("to");
      }
      if (subject==null) {
        subject = properties.getProperty("subject");
      }
      if (text==null) {
        text = properties.getProperty("text");
      }
      if (bcc==null) {
        bcc = properties.getProperty("bcc");
      }
      if (bccActors==null) {
        bccActors = properties.getProperty("bccActors");
      }
    }
    
    send(getMailServerProperties(), 
            getFromAddress(), 
            getRecipients(), 
            getBccRecipients(),
            getSubject(), 
            getText());
  }
  
  public static void send(Properties mailServerProperties, String fromAddress, List recipients, String subject, String text) {
    send(mailServerProperties, fromAddress, recipients, null, subject, text);
  }
  
  public static void send(Properties mailServerProperties, String fromAddress, List recipients, List bccRecipients, String subject, String text) {
    if ( (recipients==null)
         || (recipients.isEmpty())
       ) {
      log.debug("skipping mail because there are no recipients");
      return;
    }
    mailServerProperties.put("mail.smtp.auth", "true");
    log.debug("sending email to '"+recipients+"' about '"+subject+"'");
    
    /**
     * 添加认证类
     * royzhou 2009.07.21
     */
    String userName = mailServerProperties.getProperty("mail.smtp.user").toString();
    String password = mailServerProperties.getProperty("mail.smtp.password").toString();
    MyAuthentication myAuthentication = new MyAuthentication(userName,password);
    Session session = Session.getDefaultInstance(mailServerProperties, myAuthentication);
    MimeMessage message = new MimeMessage(session);
    try {
      if (fromAddress!=null) {
        message.setFrom(new InternetAddress(fromAddress));
      }
      Iterator iter = recipients.iterator();
      while (iter.hasNext()) {
        InternetAddress recipient = new InternetAddress((String) iter.next());
        message.addRecipient(Message.RecipientType.TO, recipient);
      }
      if (bccRecipients!=null) {
        iter = bccRecipients.iterator();
        while (iter.hasNext()) {
          InternetAddress recipient = new InternetAddress((String) iter.next());
          message.addRecipient(Message.RecipientType.BCC, recipient);
        }        
      }
      if (subject!=null) {
        message.setSubject(subject);
      }
      if (text!=null) {
        message.setText(text);
      }
      message.setSentDate(new Date());
      
      Transport.send(message);
    } catch (Exception e) {
      throw new JbpmException("couldn't send email", e);
    }
  }

  protected List tokenize(String text) {
    if (text==null) {
      return null;
    }
    List list = new ArrayList();
    StringTokenizer tokenizer = new StringTokenizer(text, ";:");
    while (tokenizer.hasMoreTokens()) {
      list.add(tokenizer.nextToken());
    }
    return list;
  }

  protected Collection resolveAddresses(List actorIds) {
    List emailAddresses = new ArrayList();
    Iterator iter = actorIds.iterator();
    while (iter.hasNext()) {
      String actorId = (String) iter.next();
      AddressResolver addressResolver = (AddressResolver) JbpmConfiguration.Configs.getObject("jbpm.mail.address.resolver");
      Object resolvedAddresses = addressResolver.resolveAddress(actorId);
      if (resolvedAddresses!=null) {
        if (resolvedAddresses instanceof String) {
          emailAddresses.add((String)resolvedAddresses);
        } else if (resolvedAddresses instanceof Collection) {
          emailAddresses.addAll((Collection)resolvedAddresses);
        } else if (resolvedAddresses instanceof String[]) {
          emailAddresses.addAll(Arrays.asList((String[])resolvedAddresses));
        } else {
          throw new JbpmException("Address resolver '"+addressResolver+"' returned '"+resolvedAddresses.getClass().getName()+"' instead of a String, Collection or String-array: "+resolvedAddresses);
        }
      }
    }
    return emailAddresses;
  }

  Properties getMailServerProperties() {
    Properties mailServerProperties = new Properties();

    if (JbpmConfiguration.Configs.hasObject("resource.mail.properties")) {
      String mailServerPropertiesResource = JbpmConfiguration.Configs.getString("resource.mail.properties");
      try {
        InputStream mailServerStream = ClassLoaderUtil.getStream(mailServerPropertiesResource);
        mailServerProperties.load(mailServerStream);
      } catch (Exception e) {
        throw new JbpmException("couldn't get configuration properties for jbpm mail server from resource '"+mailServerPropertiesResource+"'", e);
      }
    
    } else if (JbpmConfiguration.Configs.hasObject("jbpm.mail.smtp.host")) {
      String smtpServer = JbpmConfiguration.Configs.getString("jbpm.mail.smtp.host");
      mailServerProperties.put("mail.smtp.host", smtpServer);
      
    } else {
      
      log.error("couldn't get mail properties");
    }

    return mailServerProperties;
  }

  static Map templates = null;
  static Map templateVariables = null;
  synchronized Properties getMailTemplateProperties(String templateName) {
    if (templates==null) {
      templates = new HashMap();
      String mailTemplatesResource = JbpmConfiguration.Configs.getString("resource.mail.templates");
      org.w3c.dom.Element mailTemplatesElement = XmlUtil.parseXmlResource(mailTemplatesResource).getDocumentElement();
      List mailTemplateElements = XmlUtil.elements(mailTemplatesElement, "mail-template");
      Iterator iter = mailTemplateElements.iterator();
      while (iter.hasNext()) {
        org.w3c.dom.Element mailTemplateElement = (org.w3c.dom.Element) iter.next();

        Properties templateProperties = new Properties();
        addTemplateProperty(mailTemplateElement, "actors", templateProperties);
        addTemplateProperty(mailTemplateElement, "to", templateProperties);
        addTemplateProperty(mailTemplateElement, "subject", templateProperties);
        addTemplateProperty(mailTemplateElement, "text", templateProperties);
        addTemplateProperty(mailTemplateElement, "bcc", templateProperties);
        addTemplateProperty(mailTemplateElement, "bccActors", templateProperties);

        templates.put(mailTemplateElement.getAttribute("name"), templateProperties);
      }

      templateVariables = new HashMap();
      List variableElements = XmlUtil.elements(mailTemplatesElement, "variable");
      iter = variableElements.iterator();
      while (iter.hasNext()) {
        org.w3c.dom.Element variableElement = (org.w3c.dom.Element) iter.next();
        templateVariables.put(variableElement.getAttribute("name"), variableElement.getAttribute("value"));
      }
    }
    return (Properties) templates.get(templateName);
  }

  void addTemplateProperty(org.w3c.dom.Element mailTemplateElement, String property, Properties templateProperties) {
    org.w3c.dom.Element element = XmlUtil.element(mailTemplateElement, property);
    if (element!=null) {
      templateProperties.put(property, XmlUtil.getContentText(element));
    }
  }
  
  String evaluate(String expression) {
    if (expression==null) {
      return null;
    }
    VariableResolver variableResolver = JbpmExpressionEvaluator.getUsedVariableResolver();
    if (variableResolver!=null) {
      variableResolver = new MailVariableResolver(templateVariables, variableResolver);
    }
    return (String) JbpmExpressionEvaluator.evaluate(expression, executionContext, variableResolver, null);
  }

  class MailVariableResolver implements VariableResolver, Serializable {
    private static final long serialVersionUID = 1L;
    Map templateVariables = null;
    VariableResolver variableResolver = null;

    public MailVariableResolver(Map templateVariables, VariableResolver variableResolver) {
      this.templateVariables = templateVariables;
      this.variableResolver = variableResolver;
    }

    public Object resolveVariable(String pName) throws ELException {
      if ( (templateVariables!=null)
           && (templateVariables.containsKey(pName))
         ){
        return templateVariables.get(pName);
      }
      return variableResolver.resolveVariable(pName);
    }
  }

  private static Log log = LogFactory.getLog(Mail.class);
}

/**
 * 邮箱认证类
 * @author royzhou
 * 2009.07.21
 */
class MyAuthentication extends Authenticator {
	private String userName;
	private String password;
	public MyAuthentication(String userName, String password) {
		this.userName = userName;
		this.password = password;
	}
	protected PasswordAuthentication getPasswordAuthentication() {
		return new PasswordAuthentication(userName,password);
	}
}

因为在jbpm核心包org.jbpm.mail包中 Mail类 没有对smtp登陆时候有用户名和密码认证的方法。所以，重新写一个类，把相关方法添加进来。并在jbpm.cfg.xml中

<jbpm-configuration>
	<string name="mail.class.name" value="com.whqhoo.utils.Mail" />
	<string name='resource.mail.properties' value='jbpm.mail.properties' />
</jbpm-configuration>

把properties和重新写的Mail类，注入进去。

然后编写获取收取邮件的类

package com.whqhoo.mail;

import org.jbpm.mail.AddressResolver;

public class TestMail implements AddressResolver {

	public Object resolveAddress(String actorId) {
		 return "[email protected]";
	}
	

}

也要在jbpm.cfg.xml中进行注入

<bean name="jbpm.mail.address.resolver" class="com.whqhoo.mail.TestMail"
		singleton="true" />

以上完成后测试类

public class TestMailNode {
	public static void main(String[] args) {
			ProcessDefinition processDefinition = ProcessDefinition.parseXmlResource("mail/processDefinition.xml");
			ProcessInstance processInstance = new ProcessInstance(processDefinition);
			processInstance.getContextInstance().setVariable("actorId", "whqhoo");
			Token token = processInstance.getRootToken();
			token.signal();
			System.out.println("end^^^^^^^^^^^^");
	}

}

以上实现，可以正常收发邮件，有问题可以留言。请务必检查配置文件是否正确
503错误，及其他错误，均和配置文件有关系。
注：以上jbpm.cfg.xml都是一个文件，下面只是说明该文件中每行代表的意义
    感谢royzhou先生的博文
http://royzhou.iteye.com