Thursday, September 27, 2007

BPEL : How to read a file in middle of a process?

Question: How to read a file in middle of a BPEL process?

Answer: Following are the ways to read a file in mid of a BPEL process:

1. Using File Adapter: Avoid using the file adapter to read a file. The read file adapter is used to trigger the BPEL process in most cases. So in this scenario, the file adapter is not a good choice. Also it needs to use correlation sets to read files in the middle of a process.

2. Using Embedded Java code: It can solve the problem but it is not recommended and also it is hard to maintain.

3. Using built-in XPath function: The good way to read a file in the middle of a BPEL process is to use the built-in XPath function --> ora:readfile.

Example:

1. Drag an Assign activity in the swim lane at proper place

2. Create an Assign rule using the ora:readfile("file location", "xml schema path") XPath function

3. Assign the result to a variable.
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6 comments:

  1. BrainlaraApril 10, 2008 at 12:00 AM

    Pretty neat explanation. Thanks, it really informative.

    ReplyDelete
  2. AmitMay 12, 2009 at 5:11 PM

    Not working Abhishek

    ReplyDelete
  3. Abhishek SaurabhMay 13, 2009 at 1:21 AM

    Hi Amit,

    What is the commands you are wriying for calling the function.

    Try using something like:
    ora:readFile('file:///c:\temp\temp.txt')

    Cheers,
    Abhi...

    ReplyDelete
  4. UnknownFebruary 8, 2012 at 9:44 AM

    can you explain how sync read option works in file adapter.....

    ReplyDelete
  5. raghuMay 7, 2012 at 10:57 AM

    Hi Abhi,
    I wrote the xpath function as u mentioned in the previous post.
    But i am not getting the content of the file in the response.

    Thanks,
    Raghu

    ReplyDelete
  6. AnonymousFebruary 28, 2013 at 12:52 AM

    Hi,i am using jdev11.1.1.3.0 so i want to use syncread option to read the file in middle.bt i am not getting proper output.the file is read bt not write.so can u pls explain me...

    ReplyDelete