OSWorkflow的第三支程式

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workflow

Workflow Servlet JSP XML OS

如前面的請假流程，員工只是請假，但是假有分很多種，事假、病假、婚假、年假…，在workflow中如何區分呢? 我們可以傳值到流程中，並儲存在資料庫中供以後判斷!

程式
    leave.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE workflow PUBLIC "-//OpenSymphony Group//DTD OSWorkflow 2.7//EN"
"http://www.opensymphony.com/osworkflow/workflow_2_7.dtd">
<workflow>
<initial-actions>
   <action id="0" name="開始">
      <pre-functions>
<function type="class">
<arg name="class.name">com.opensymphony.workflow.util.Caller</arg>
    </function>
        <function type="beanshell">
           <arg name="script">
             propertySet.setString("type", transientVars.get("type"));
           </arg>
        </function>
      </pre-functions>
      <results>
        <unconditional-result old-status="Finished" status="Queued"
step="1" owner="${caller}" />
      </results>
      <post-functions>
            <function type="class">
              <arg name="class.name">
              tw.idv.idealist.OutputPropertySet
              </arg>
              <arg name="author">Steven Shi</arg>
            </function>
      </post-functions>
    </action>
</initial-actions>

<steps>
    <step id="1" name="填假單">
      <actions>
        <action id="1" name="送出">
          <restrict-to>
            <conditions>
              <condition type="class">
                <arg name="class.name">
                  com.opensymphony.workflow.util.AllowOwnerOnlyCondition
                </arg>
              </condition>
            </conditions>
          </restrict-to>
          <pre-functions>
    <function type="class">
      <arg name="class.name">com.opensymphony.workflow.util.Caller</arg>
    </function>
          </pre-functions>
          <results>
            <unconditional-result old-status="Finished" status="Queued"
step="2" owner="${caller}" />
          </results>
        </action>
      </actions>
    </step>

    <step id="2" name="批假單">
      <actions>
        <action id="2" name="准許">
          <pre-functions>
    <function type="class">
      <arg name="class.name">com.opensymphony.workflow.util.Caller</arg>
    </function>
</pre-functions>
          <results>
            <unconditional-result old-status="Finished" status="Queued"
step="3" owner="${caller}"/>
          </results>
        </action>

        <action id="3" name="駁回">
<pre-functions>
    <function type="class">
      <arg name="class.name">com.opensymphony.workflow.util.Caller</arg>
    </function>
          </pre-functions>
          <results>
            <unconditional-result old-status="Finished" status="Queued"
step="1" owner="${caller}"/>
          </results>
        </action>
      </actions>
    </step>

    <step id="3" name="停止" />
</steps>
</workflow>
    leave.jsp
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<HTML>
<HEAD>
<%@ page language="java" contentType="text/html; charset=BIG5" pageEncoding="BIG5" %>
<%@ page import="tw.idv.idealist.*" %>

<META http-equiv="Content-Type" content="text/html; charset=BIG5">
<META http-equiv="Content-Style-Type" content="text/css">
<TITLE>填寫假單</TITLE>
<Script Language="JavaScript">
function DoAction(type) {
document.myForm.type.value = type;
document.myForm.submit();
}
</Script>
</HEAD>
<BODY>
<P>員工請假</P>

<form name="myForm" action="LeaveAction">
<input type="hidden" name="type" value="">
員工代號: <input type="text" name="employee"><br>
<input type="button" value="事假" OnClick="DoAction(1)">
 <input type="button" value="病假" OnClick="DoAction(2)">
</form>

</BODY>
</HTML>
    Leave.java
package tw.idv.idealist;

import java.util.HashMap;
import com.opensymphony.workflow.*;
import com.opensymphony.workflow.basic.BasicWorkflow;
import com.opensymphony.workflow.config.DefaultConfiguration;
import com.opensymphony.workflow.spi.Step;

/**
* 請假流程
* @author steven
*/
public class Leave {
/**
* 啟動流程
* @param employee 員工編號
* @param type 假別
* @return 工作流編號
*/
public long start(String employee, String type) {
Workflow workflow = new BasicWorkflow(employee);
DefaultConfiguration config = new DefaultConfiguration();
workflow.setConfiguration(config);
long workflowId = -1;
try {
HashMap map = new HashMap();
map.put("type", type);
//leave是workflowx.xml中定的名稱
workflowId = workflow.initialize("leave", 0, map);
} catch (InvalidActionException e) {
e.printStackTrace();
} catch (InvalidRoleException e) {
e.printStackTrace();
} catch (InvalidInputException e) {
e.printStackTrace();
} catch (InvalidEntryStateException e) {
e.printStackTrace();
} catch (WorkflowException e) {
e.printStackTrace();
}

return workflowId;
}

/**
* 送出假單
* @param workflowId 工作流編號
* @param employee 員工編號
*/
public void send(long workflowId, String employee) {
Workflow workflow = new BasicWorkflow(employee);
DefaultConfiguration config = new DefaultConfiguration();
workflow.setConfiguration(config);
try {
workflow.doAction(workflowId, 1, null);
} catch (InvalidActionException e) {
e.printStackTrace();
} catch (InvalidRoleException e) {
e.printStackTrace();
} catch (InvalidInputException e) {
e.printStackTrace();
} catch (InvalidEntryStateException e) {
e.printStackTrace();
} catch (WorkflowException e) {
e.printStackTrace();
}
}

/**
* 准假假單
* @param workflowId 工作流編號
* @param actionId 動作編號, 2 准許, 3 駁回
*/
public void allow(long workflowId, int actionId) {
Workflow workflow = new BasicWorkflow("manager1");
DefaultConfiguration config = new DefaultConfiguration();
workflow.setConfiguration(config);
try {
workflow.doAction(workflowId, actionId, null);
} catch (InvalidInputException e) {
e.printStackTrace();
} catch (WorkflowException e) {
e.printStackTrace();
}
catch (InvalidActionException e) {
e.printStackTrace();
}
}
}
    LeavaAction.java
package tw.idv.idealist.actions;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import tw.idv.idealist.Leave;

/**
* @author Steven
*/
public class LeaveAction extends HttpServlet {

public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req, resp);
}

public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
Leave leave = new Leave();
String employee = req.getParameter("employee");
String type = req.getParameter("type");
long workflowId = leave.start(employee, type);
leave.send(workflowId, employee);
resp.sendRedirect("allow.jsp?workflowId=" + workflowId);
}

}
    OutputPropertySet.java
package tw.idv.idealist;

import java.util.Map;

import com.opensymphony.module.propertyset.PropertySet;
import com.opensymphony.workflow.FunctionProvider;
import com.opensymphony.workflow.WorkflowException;

/**
* @author steven
*/
public class OutputPropertySet implements FunctionProvider {
public void execute(Map transientVars, Map args, PropertySet ps)
          throws WorkflowException {
if (ps.getString("type").equals("1")) {
System.out.println("事假");
}
else if (ps.getString("type").equals("2")) {
System.out.println("病假");
}
System.out.println("author => " + args.get("author"));
}
}

測試
注意觀察console輸出和資料庫，OutputPropertySet會輸出如下值到console。

病假
author => Steven Shi

資料庫Table OS_PROPERTYENTRY則出現如下的值，可以看到假別已存入資料庫。