OSWorkflow是一个灵活的工作流引擎，设计成可嵌入到企业应用程序中。它提供了许多的持久化API支持包括：EJB,Hibernate,JDBC和其它。OSWorkflow还可以与Spring集成。
网址：http://www.opensymphony.com/osworkflow/

1.OSWorkflow基本概念(gigix)
http://gigix.blogdriver.com/gigix/113138.html
2.osworkflow中文指南(Quake Wang)
http://wiki.opensymphony.com/display/WF/Tutorial+-+Chinese
3.OSWorkflow入门(史帝芬心得笔记)
http://my.so-net.net.tw/idealist/OSWorkflow/
4.英文文档
http://wiki.opensymphony.com/display/WF/Manual
5.深入分析(银狐999)
http://blog.csdn.net/james999/category/52990.aspx

其它关于osworkflow的文章

http://captainandboat.spaces.live.com/blog/cns!9a3607f7808d2d0d!334.entry

http://qinysong.iteye.com/blog/post/333919

http://www.cnblogs.com/jssy/archive/2007/06/08/776175.html

http://zhusl.blog.sohu.com/32223382.html

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE workflow PUBLIC "-//OpenSymphony Group//DTD OSWorkflow 2.6//EN" "http://www.opensymphony.com/osworkflow/workflow_2_8.dtd">
<workflow>
 <registers>
  <register type="class" variable-name="log">
   <arg name="class.name">com.opensymphony.workflow.util.LogRegister</arg>
   <arg name="addInstanceId">true</arg>
  </register>
 </registers>

 <initial-actions>
  <action id="100" name="Start Ordinary Workflow">
   <results>
    <unconditional-result old-status="Finished"
     status="Queued" step="1" />
   </results>
  </action>
  <action id="200" name="Start Emergent Workflow">
   <results>
    <unconditional-result old-status="Finished"
     status="Queued" step="5" />
   </results>
  </action>
 </initial-actions>

 <steps>

  <step id="1" name="Initiate Doc">
   <actions>
    <action id="1" name="Initial Work">
     <restrict-to>
      <conditions>
       <condition type="class">
        <arg name="class.name">
         com.opensymphony.workflow.util.StatusCondition
        </arg>
        <arg name="status">Queued</arg>
       </condition>
      </conditions>
     </restrict-to>
     <validators>
      <validator type="class">
       <arg name="class.name">
        org.abin.lee.validator.TitleValidator
       </arg>
      </validator>
     </validators>
     <pre-functions>
      <function type="class">
       <arg name="class.name">
        com.opensymphony.workflow.util.Caller
       </arg>
       <arg name="stepId">1</arg>
      </function>
      <function type="beanshell">
       <arg name="script">
        transientVars.get("log").info("Initiate Work");
       </arg>
      </function>
     </pre-functions>
     <results>
      <unconditional-result old-status="Finished"
       status="Prepared" step="1" owner="${caller}" />
     </results>
     <post-functions>
      <function type="beanshell">
       <arg name="script">
        propertySet.setString("title",
        (String)transientVars.get("title"));
       </arg>
      </function>
     </post-functions>
    </action>
    <action id="2" name="Deliver Work">
     <restrict-to>
      <conditions type="AND">
       <condition type="class">
        <arg name="class.name">
         com.opensymphony.workflow.util.StatusCondition
        </arg>
        <arg name="status">Prepared</arg>
        <arg name="stepId">1</arg>
       </condition>
       <condition type="class">
        <arg name="class.name">
         com.opensymphony.workflow.util.AllowOwnerOnlyCondition
        </arg>
       </condition>
      </conditions>
     </restrict-to>
     <pre-functions>
      <function type="beanshell">
       <arg name="script">
        transientVars.get("log").info("Deliver Doc to Boss A and B");
       </arg>
      </function>
     </pre-functions>
     <results>
      <unconditional-result old-status="Finished"
       status="Prepared" split="1" />
     </results>
    </action>
   </actions>
  </step>

  <step id="2" name="Review Doc In Boss A">
   <external-permissions>
    <permission name="permA">
     <restrict-to>
      <conditions type="AND">
       <condition name="check.status" type="class">
        <arg name="class.name">com.opensymphony.workflow.util.StatusCondition</arg>
        <arg name="status">Prepared</arg>
       </condition>
       <condition name="allow.owner.only" type="class">
        <arg name="class.name">com.opensymphony.workflow.util.AllowOwnerOnlyCondition</arg>
       </condition>
      </conditions>
     </restrict-to>
    </permission>
   </external-permissions>
   <actions>
    <action id="3" name="Review Work By A">
     <pre-functions>
      <function type="beanshell">
       <arg name="script">
        transientVars.get("log").info("Doc Reviewed By Boss A")
       </arg>
      </function>
     </pre-functions>
     <results>
      <unconditional-result old-status="Finished"
       status="Underway" join="1" />
     </results>
    </action>
   </actions>
  </step>

  <step id="3" name="Review Doc In Boss B">
   <external-permissions>
    <permission name="permA">
     <restrict-to>
      <conditions type="AND">
       <condition name="check.status" type="class">
        <arg name="class.name">com.opensymphony.workflow.util.StatusCondition</arg>
        <arg name="status">Prepared</arg>
       </condition>
       <condition name="allow.owner.only" type="class">
        <arg name="class.name">com.opensymphony.workflow.util.AllowOwnerOnlyCondition</arg>
       </condition>
      </conditions>
     </restrict-to>
    </permission>
   </external-permissions>
   <actions>
    <action id="4" name="Review Work By B">
     <pre-functions>
      <function type="beanshell">
       <arg name="script">
        transientVars.get("log").info("Doc Reviewed By Boss B")
       </arg>
      </function>
     </pre-functions>
     <results>
      <unconditional-result old-status="Finished"
       status="Underway" join="1" />
     </results>
    </action>
   </actions>
  </step>

  <step id="4" name="Finish Ordinary Work">
   <pre-functions>
    <function type="beanshell">
     <arg name="script">
      System.out.println("Finish Doc Review. \nTitle:"+propertySet.getString("title")+".");
     </arg>
    </function>
   </pre-functions>
  </step>

  <step id="5" name="Finish Emergent Work">
   <pre-functions>
    <function type="beanshell">
     <arg name="script">
      System.out.println("Emergency Handler");
     </arg>
    </function>
   </pre-functions>
  </step>

 </steps>

 <splits>
  <split id="1">
   <unconditional-result old-status="Finished"
    status="Prepared" step="2" />
   <unconditional-result old-status="Finished"
    status="Prepared" step="3" />
  </split>
 </splits>

 <joins>
  <join id="1">
   <conditions type="AND">
    <condition type="beanshell">
     <arg name="script"><![CDATA[ "Finished".equals(jn.getStep(2).getStatus()) && "Finished".equals(jn.getStep(3).getStatus()) ]]></arg>
    </condition>
   </conditions>
   <unconditional-result old-status="Finished"
    status="Reviewed" step="4" />
  </join>
 </joins>

</workflow>

package org.abin.lee.validator;

import java.util.Map;
import com.opensymphony.module.propertyset.PropertySet;
import com.opensymphony.workflow.InvalidInputException;
import com.opensymphony.workflow.Validator;
import com.opensymphony.workflow.WorkflowException;

public class TitleValidator implements Validator {
 public void validate(Map transientVars, Map args, PropertySet ps)
   throws InvalidInputException, WorkflowException {
  System.out.println("TitleValidator is running");
  String title = (String) transientVars.get("title");
  if (title == null)
   throw new InvalidInputException("Missing title");
  if (title.length() > 30)
   throw new InvalidInputException("Title too long");
 }
}

package org.abin.lee.workflow;

import java.util.HashMap;

import com.opensymphony.workflow.InvalidActionException;
import com.opensymphony.workflow.InvalidEntryStateException;
import com.opensymphony.workflow.InvalidInputException;
import com.opensymphony.workflow.InvalidRoleException;
import com.opensymphony.workflow.Workflow;
import com.opensymphony.workflow.WorkflowException;
import com.opensymphony.workflow.basic.BasicWorkflow;
import com.opensymphony.workflow.config.DefaultConfiguration;

public class SimpleSample {
 public static void main(String[] args) {
  try {
   Workflow workflow = new BasicWorkflow("abin");

   DefaultConfiguration config = new DefaultConfiguration();
   workflow.setConfiguration(config);

   long workflowId = workflow.initialize("docworkflow", 100, null);
   HashMap inputs = new HashMap();
   inputs.put("title", "openopen");

   workflow.doAction(workflowId, 1, inputs);

   workflow.doAction(workflowId, 2, null);

   workflow.doAction(workflowId, 3, null);

   workflow.doAction(workflowId, 4, null);
   
  } catch (InvalidActionException e) {
   System.out.println(e.getMessage());
  } catch (InvalidRoleException e) {
   System.out.println(e.getMessage());
  } catch (InvalidInputException e) {
   System.out.println(e.getMessage());
  } catch (InvalidEntryStateException e) {
   System.out.println(e.getMessage());
  } catch (WorkflowException e) {
   System.out.println(e.getMessage());
  }
 }
}

log4j.rootCategory=info,log,console

log4j.logger.org.apache.axis2.enterprise=FATAL
log4j.logger.de.hunsicker.jalopy.io=FATAL
log4j.logger.httpclient.wire.header=FATAL
log4j.logger.org.apache.commons.httpclient=FATAL

log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d [%t] %-5p %c %x - %m%n
 
log4j.appender.log=org.apache.log4j.DailyRollingFileAppender
log4j.appender.log.File=logs/osworkflow.log
log4j.appender.log.layout=org.apache.log4j.PatternLayout
log4j.appender.log.layout.ConversionPattern=%d [%t] %-5p %c %x - %m%n

http://blog.sina.com.cn/s/blog_544a96ce0100nvjy.html

http://blog.csdn.net/tanruitian/article/details/498167

http://www.cnblogs.com/jacky73/archive/2008/12/17/1357134.html