File Adapter write operation behaviour

Hi,
We actually have a process which read JMS Messages, and write a file.
We don't want to have one file for each JMS Message, so we try to use "Number of Messages equals" and "Elapsed time exceeds".
This is an example of the behaviour we are expecting :
Elapsed time exceeds = 10s
Deploy process BPEL / ESB
0s - 1 JMS incoming
10s - a file with 1 record is created.
3 JMS incoming
20s - a file with 3 record is created.
2 JMS incoming
30s - a file with 2 record is created.
What happens in reality :
0s - 1 JMS incoming
10s - No file generation
1 JMS incoming => a file with the previous record is created.
2 JMS incoming
20s - No file generation
1 JMS incoming => a file with the 3 previous records is created.
1 JMS incoming
30s - No file generation
If no JMS are incoming during 3 month... didn't have any file for my 2 last JMS Messages.
The trigger to check the condition of creation of the files seems to be a new process call.
So... is it the normal behaviour ? Is it a bug ? Are we making something wrong ?
The problem exist also for "Number of Messages equals".
I think many people use this, how do you do to resolve this problem ?

Unfortunately, this is documented bahaviour (solution/workaround anyone?!):
Elapsed Time Exceeds:
Specify a time which, when exceeded, causes a new outgoing file to be created.
Note:
The Elapsed Time Exceeds batching criteria is evaluated and a new outgoing file is created, only when an invocation happens.
For example, if you specify that elapsed time exceeds 15 seconds, then the first message that is received is not written out, even after 15 seconds, as batching conditions are not valid. If a second message is received, then batching conditions become valid for the first one, and an output file is created when the elapsed time exceeds 15 seconds.

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<?xml version = "1.0" encoding = "UTF-8" ?>
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targetNamespace="http://xmlns.oracle.com/FirstApplication/FileWriter/BPELProcessWriteToFile"
xmlns="http://docs.oasis-open.org/wsbpel/2.0/process/executable"
xmlns:client="http://xmlns.oracle.com/FirstApplication/FileWriter/BPELProcessWriteToFile"
xmlns:ora="http://schemas.oracle.com/xpath/extension"
xmlns:bpel="http://docs.oasis-open.org/wsbpel/2.0/process/executable"
xmlns:ns1="http://xmlns.oracle.com/pcbpel/adapter/file/FirstApplication/FileWriter/WriteTextToFile"
xmlns:bpelx="http://schemas.oracle.com/bpel/extension"
xmlns:bpws="http://schemas.xmlsoap.org/ws/2003/03/business-process/"
xmlns:xp20="http://www.oracle.com/XSL/Transform/java/oracle.tip.pc.services.functions.Xpath20"
xmlns:oraext="http://www.oracle.com/XSL/Transform/java/oracle.tip.pc.services.functions.ExtFunc"
xmlns:dvm="http://www.oracle.com/XSL/Transform/java/oracle.tip.dvm.LookupValue"
xmlns:hwf="http://xmlns.oracle.com/bpel/workflow/xpath"
xmlns:ids="http://xmlns.oracle.com/bpel/services/IdentityService/xpath"
xmlns:bpm="http://xmlns.oracle.com/bpmn20/extensions"
xmlns:xdk="http://schemas.oracle.com/bpel/extension/xpath/function/xdk"
xmlns:xref="http://www.oracle.com/XSL/Transform/java/oracle.tip.xref.xpath.XRefXPathFunctions"
xmlns:ldap="http://schemas.oracle.com/xpath/extension/ldap">
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<receive name="receiveInput" partnerLink="bpelprocesswritetofile_client" portType="client:BPELProcessWriteToFile" operation="process" variable="inputVariable" createInstance="yes"/>
<assign name="Assign">
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<from>string('$inputVariable.payload/client:input')</from>
<to>$inputVariable.payload/client:input</to>
</copy>
</assign>
<invoke name="InvokeWriteTextToFile"
partnerLink="WriteTextToFile" portType="ns1:Write_ptt"
operation="Write"
inputVariable="inputVariable" bpelx:invokeAsDetail="no"/>
</sequence>
</process>

The error seen in your case typically occurs when the schemas of BPEL valriable and the schema of message in file adapter WSDL are different. You may use a transform activity in BPEL to map the fields of the two schemas.
You may also like to have a look at various file adapter examples at
http://java.net/projects/oraclesoasuite11g/pages/FileAdapters
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Regards.

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I think I got your point... You can tell FileAdapter the filename to write, but if you don't then FileAdapter can not tell you the filename that it wrote... I think it is pretty possible Oracle didn't implement the latter, as the write operation is probably asynchronous and the filename is calculated later on...
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http://docs.oracle.com/cd/E15586_01/integration.1111/e10226/ad_mon.htm#CJHHBBID
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I am using File adapter to read files from the given location.
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When i am trying to write data to file, it was opened by another person and it gave error in the receiver communication channel saying like source is using by another application. Which is well and good
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Hi Neetesh,
>>hmm ... that's weird ... you mean to say that the polling frequency is now (20 + 100) = 120 secs ? Unless and until the file is not being modified or the file is not "open", this parameter shouldn't work ...
Examples
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>>Can you share the adapter log?
Processing Details for Cluster Node Server 0 10_31463
     5/20/10 3:49:56 PM           Polling interval started. Length: 20.0 seconds
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     5/20/10 3:49:56 PM           Processing started
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     5/20/10 3:49:55 PM            4f1e0c5b-9553-4397-30ef-d3bb55a13a48     Message with ID 4f1e0c5b-9553-4397-30ef-
                                               d3bb55a13a48 processed
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     5/20/10 3:47:55 PM           Polling interval started. Length: 20.0 seconds
     5/20/10 3:47:55 PM           Processing finished successfully
     5/20/10 3:47:55 PM           Processing started
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Hi Ian
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http://help.sap.com/saphelp_nw04/helpdata/en/31/f0ff69551e4f259fdad799a229363e/frameset.htm
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Unfortunately, this is documented bahaviour (solution/workaround anyone?!):
Elapsed Time Exceeds:
Specify a time which, when exceeded, causes a new outgoing file to be created.
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Unfortunately, this is documented bahaviour (solution/workaround anyone?!):
Elapsed Time Exceeds:
Specify a time which, when exceeded, causes a new outgoing file to be created.
Note:
The Elapsed Time Exceeds batching criteria is evaluated and a new outgoing file is created, only when an invocation happens.
For example, if you specify that elapsed time exceeds 15 seconds, then the first message that is received is not written out, even after 15 seconds, as batching conditions are not valid. If a second message is received, then batching conditions become valid for the first one, and an output file is created when the elapsed time exceeds 15 seconds.

File adapter Read operation not working.

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You should extensively practice the samples given in Oracle's documentation guide for modelling Native XSD. That will give you a better idea, about how to go about the native xsd schemas.. Anyways, I looked into your schema.. You need to make 2 changes to make this xsd work..
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Edited by: user12018221 on May 25, 2011 1:48 PM

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File Adapter write operation behaviour

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