It has been some time that I got queries on how to get
started on BPM .The best way to start on any technology or product stack is to
do it the HelloWorld way. Always start with a hello world example.
I am using 11.1.1.1.6 environment for the examples.
There is a good step by step guide of getting started
in BPM @ link
To start up with you can just do the small part of
getting the hello message /greeting and writing it to a file . In Jdev it will
look like this.
The Request Hello in turn is implemented using a Human
work flow activity, which receives in a HelloMessage and makes a service call
which in turn calls a file adapter to write to a file.
Two activities between Start and End in BPM layer. The
implementations of these 2 activities are done in SOA layer using Human work Flow
and call to a file adapter.
I will list down some points/issues you may face doing
this example
- The JDev Role matters, In case you select the BPM Role for Jdeveloper development, the implementation tab will be missing from your activities when you drill down. So if you want to the implementation in SOA then the Role must be default which gives access to both BPM and SOA together.
- During your development the main tab that yo will be using is the BPMProjectNavigator which will list the different components that will be part of your process.
- There are some chances the auto-create Task form may run into issues. So create the Task form again and delete previous UI project associated with the BPM process.
- Once you compile/deploy BPM process, you will need to login to BPM workspace to view and initiate the process. The common issue is that The BPM process is not visible in th BPM workspace. The User roles become pretty important in BPM. By default the Role of the Hello world activities will be tied to Role. You can change it to Requester or other role based on your process design.
These roles will now need to be mapped to users.
In case the process doesn’t show up you will have to
check or create /modify users for roles.
The below screenshots show the configurations that need
to be done on User roles in jdeveloper, EM and BPM workspace.
In
jdeveloper
a)
Add the users to the roles used in the
process/project.
In
Oracle Enterprise Manager
a)
Expand the domain farm and select Application Deployments
b)
Select the deployed Application .Go to
Security >Application Roles
c)
Add the <project name>.<rolename>
and Users to the roles who can access the role.
In
oracle BPM workspace
a)
Go to Administration tab >Roles
b)
Add the user to <composite name>.<role name>
members.
- In BPM workspace when you click on process to initiate the process for entering the Hello Message. The UI page throws an error .Page not found exception.
Error: OracleJSP
error: java.io.FileNotFoundException: Set the init-param debug_mode to
"true" to see the complete exception message.
The error is because adfc-config.xml refers to
Empty1.jspx file.
Create a empty jspx file and name it as Empty1.jspx ,
add below content in the file.
<?xml
version='1.0' encoding='windows-1252'?>
<jsp:root
xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<jsp:directive.page
contentType="text/html;charset=windows-1252"/>
<f:view>
<af:document
id="d1">
<af:form
id="f1"></af:form>
</af:document>
</f:view>
</jsp:root>
Once you add the file and redeploy the process the
error will not recur.
Then you can enter all the hello message and submit the
values, which in turn will make a service call to write a message to the file
as specified in file adapter.
This is all some points I wanted to share with the
newbies starting on BPM 11g
Hav a gr8 day ahead J
