Start learning jbpm

 

Jbpm is required because of the work relationship, but I have never touched it before. It should be from scratch. I will write down some of my learning points later. My tutorial is a Chinese version of jbpm jpdl user development manual 3.2.3, however, it is faster than reading English slowly. Now we are talking about efficiency, and the author is a kind of person.

 

　　Download: (jbpm SourceForge file list)

Jbpm-jpdl-suite-3.2.3.zip

　　There is no special reason. This version is used in the tutorial.

Eclipse-jee-europa-winter-win32.zip

　　To use the jbpm 3.2.3 designer plug-in, you must support eclipse 3.3. You can only temporarily shelve eclipse 3.5.

 

　　Installation:

　　Of course, the premise of using jbpm is that you have installed and configured JDK. You don't have to talk about it,

1. Decompress jbpm-jpdl-stuite-3.2.3.zip.
2. Decompress eclipse-jee-europa-winter-win32.zip
3. Install the graphics designer plug-in. Copy the content in the eclipse folder under the decompressed designer directory to the root directory of eclipse 3.3, and restart eclipse to complete plug-in installation. After the plug-in is installed, you can find related items of jbpm in the new dialog box. Expand the "JBoss jbpm" branch in eclipse's "WINDOW> Preferences" and add a runtime Location Path to the path after the jbpm-jpdl-stuite-3.2.3 is decompressed. You can see the deployment configuration of jbpm in the server deployment branch.

   　　Copy the content in the eclipse folder under the designer directory decompressed by jbpm-jpdl-stuite-3.2.3.zip to the root directory of eclipse 3.3, and restart eclipse to install the plug-in. After the plug-in is installed, you can find related items of jbpm in the new dialog box.

4. Configure the jbpm plug-in runtime environment.
   　Expand the "JBoss jbpm" branch in eclipse's "WINDOW> Preferences" and add a runtime Location Path to the path after the jbpm-jpdl-stuite-3.2.3 is decompressed. You can see the deployment configuration of jbpm in the server deployment branch.

 

　　Hello, world:

Take Hello, world in the tutorial as an example. The process is as follows.

 

　　

 

Create a new"Process Project"Project, and then create a helloworld class.

Package Org. zym. helloworld; <br/> Import Org. jbpm. graph. def. processdefinition; <br/> Import org.jbpm.graph.exe. processinstance; <br/> Import org.jbpm.graph.exe. token; <br/> Import JUnit. framework. testcase; <br/> public class helloworld extends testcase {<br/> Public void testhelloworldprocess () {<br/> // This method displays the execution of a process definition and a process definition. <Br/> // The process definition has three nodes: <br/> // Untitled Start-state, state's and end-state nodes named 'end' <br/> // The next line parses XML text to the processdefinition class <br/> // processdefinition is used as a Java object the formal description of the process. <Br/> string xml = "<process-definition>" + "<start-State>" <br/> + "<transition to ='s '/>" +" </start-State> "<br/> +" <state name ='s '> "+" <transition to = 'end'/> "+" </State> "<br/> +" <end-state name = 'end'/> "+" </process-definition> "; <br/> processdefinition = processdefinition <br/>. parsexmlstring (XML); <br/> // create a process definition execution in the next row. After the creation, the process execution has a master path <br/> // (= root token), which is located in the sta RT-state node location. <Br/> processinstance = new processinstance (processdefinition); <br/> // create a master path (= root token) for process execution. <br/> token = processinstance. getroottoken (); <br/> // after the process definition is created, determine the node where the main path card starts. <br/> assertsame (processdefinition. getstartstate (), Token. getnode (); <br/> // Let's start the process execution and exit the Start Node through its default process conversion <br/> token. signal (); <br/> // The signal method will be blocked until the process execution enters a waiting state <br/> // The main path for execution is now located in the state 's' <br/> assert Same (processdefinition. getnode ("S"), Token. getnode (); <br/> // Let's send a signal. Assume that the execution of the exit state is switched by default. <br/> token. signal (); <br/> // The current information method is returned because the process instance has reached the end node (end-state) <br/> assertsame (processdefinition. getnode ("end"), Token. getnode (); <br/>}< br/>} 

Run the Hello world command using JUnit.