SYNC/ASYNC - Proxy to File

I have a sync proxy. It will sent a mesg. from R3 and I have to write it to a file and then from a diff file I have to read and sent a mesg. back to R3.
So Sync Proxy -> XI -> File1 : File2 -> XI -> Sync Proxy
Now I am sure a SYNC/ASYNC bridge will be used in BPM.
How many Mesg. Interface will come in the picture ?
1. sync outbound for the Proxy
2. async outbound for the incoming file
3. async inbound for out going file
4. Now for the abstract interfaces;
a. sync abs for proxy
b. 2 more abstract async interfaces (but what sud it correspond to ? the proxy req/resp or file req/resp)
My understanding is;
1. SyncReceive To Receive the payload synchronously from Proxy (open S/A Bridge)
2. Send To Send the request payload Asynchronously from BPM to the File system
3. Receive To receive the response Asynchronously from Legacy File system to BPM
4. SyncSend To Send the response Synchronously from BPM to Proxy (close S/A Bridge)
My design;
In SyncReceive To Receive the payload synchronously from Proxy (open S/A Bridge)
Sync Interface abst. Sync proxy
Message - Abs aysnc req. of proxy
In Send To Send the request payload Asynchronously from BPM to the File system
Message Abs aysnc req. of proxy
In Receive To receive the response Asynchronously from Legacy File system to BPM
Message Abs async resp. proxy
In SyncSend To Send the response Synchronously from BPM to Proxy (close S/A Bridge)
Message - Abs async resp. proxy
Can you confirm on this ? Kinda confused cos I havnt mentioned any mesg. interface pertaining to the file here

well, now that the design is confirmed (can somebody tell me y we dont mention any of the file interface in BPM), where do i actually handle my mapping ?
Cos i will have 2 mapping;
ProxyReq -> File1
File2 -> ProxyResp
and how do i go onto create my Interface mapping ?
Cos Proxy is a sync interface but file gets to be a Async.
And yeah Udo, i do seriously doubt the performance ... but well at this point i will leave that concern away and get onto build up the scenario.
Does is sound stupid ??? Well consider these questions to be be that of someone who encountered a SYNC/ASYNC for the very first time
Message was edited by: Shabarish Vijayakumar

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Solved the problem..
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2. I restarted the server...probably the problem
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hi,
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken]
check this blog..and same thing I did in my scenario
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I am not able to receive the RFC request itself inside my BPM first step...getting the Timeout error.
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Dear Michal/Senthil,
Can you pl clear a confusion that i have had for ages...
suppose there is a sync/async bridge ( i understand that it is used for sync business system too async BS communcation )
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Edited by: Tarang Shah on Mar 3, 2009 12:51 PM

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Did anyone got the same problem before? 
Guys, you need to help me in this pls
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Just to let you know that I have gotten sync-async WSDL to work.
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Hi Friends, 
I am in a problem, I have one jpd published as a webservice to a poral [synchronous] client. This jpd is asynchronous,meaning it have separate client request and client response node, but the same jpd is calling one more process control[async again] to do the dirty work of tranforming incoming request and then sending to legacy system using JMS control[async activity]. The question is, can we call the outer jpd [that is published as a web-service] synchronously from a portal page. I seen the weblogic docs they say to make sync-async wsdl file and define client callback method,I tried it but it doesn't work. I think my design fall in some limitation that the doc is talking about as in between pair of client request and client response node I have another client request to the process control [for transforming and sendng receiving message]. 
 Is there anyother way to make it work? 
 Did anyone got the same problem before? 
 Guys, you need to help me in this pls I already tried lots of permutation and combination to arrive at this design so pls don't ask me to change this now. :( 
Cheers, 
Shailesh

Hi Rohini,
Sync/async communication enables a synchronous sender system to communicate with a receiver system that cannot process synchronous messages.
The central component of sync/async communication is the sync/async bridge, which enables the Integration Server to receive synchronous messages from a sender and send them to a receiver as asynchronous messages. Conversely, it can send the asynchronous response from the receiver back to the sender as a synchronous response.
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The Business Process Engine receives the asynchronous response from the receiver, correlates it with the corresponding query, and activates the waiting process, which then sends the response back to the sender synchronously.
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Namespace: http://sap.com/xi/XI/System/Patterns
Go through this link to get a good idea as to how to <a href="http://help.sap.com/saphelp_nw04/helpdata/en/43/65d4dab39b0398e10000000a1553f6/frameset.htm">Define Sync/Async Communication</a>
This blog also should give you some idea...
https://www.sdn.sap.com/sdn/weblogs.sdn?blog=/pub/wlg/1403 [original link is broken]
Also go through these links:
http://help.sap.com/saphelp_nw04/helpdata/en/83/d2a84028c9e469e10000000a1550b0/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c4/dc06418752ef6fe10000000a1550b0/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/f9/66bf40ad090366e10000000a1550b0/RN_XI_DE_neu.pdf
I hope it helps.
Regards,
Abhy
Message was edited by: Abhy Thomas

BPM Design using sync-async bridge

Hi Arpit,
Below mentioned is an overview of the process flow which we are trying to implement.
1. A synchronous interface takes in the request
2. After the mapping, a file is created
3. Another file adapter reads this file and sends a message back to the sync interface. This step is to make sure that the file is created
I'm using a sync-async bridge for this process, since file creation and reading processes are asynchronous and the request/response is synchronous.
Can somebody help me by telling how to design the BPM. How many send and receive steps are required etc?
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 | Request | | | | | | | |
 |--------->| | | | | | |File |
HTTP| |Sync|--->|Mapping|--->|Async|--->|Adapter|
 |<---------|I/f |<- | | |I/f | |(write)|
 | Response | | | | | | | |_______|
 | |
 | |
 | ____|___
 || | | | | |
 -|Async |<--|File Adp|<---|Folder |
 | I/f | |(read) | |________|

Hi
>>I have to map the incoming xml from HTTP to another format before creating the file.
Ya then u can use the transform Step in between the
sync Recv ---> Transform ---> Send to File System
>>Once a file is read, that interface has to send an acknowledgement message telling the status.
Wht type of acknowledgement msg telling the status.
I think u can add another element in ur created file payload like Status: Created (ConstanT)
Then u can map the payload of the readed file with tis payload having Ststus init.Fo this u need a Transformation Step.
BTW i was searching some previous blogs and i got this and it is bit related to ur scenario.Go thru this
/people/sriram.vasudevan3/blog/2005/01/11/demonstrating-use-of-synchronous-asynchronous-bridge-to-integrate-synchronous-and-asynchronous-systems-using-ccbpm-in-sap-xi
Hope it helps.
Regards
Arpit Seth

Sync Async without BPM and JMS.

Hi Guys,
Searched SDN a lot but in vain...
i have soap(Sync) to File(Async) synario...Soap response can have like this "PI system received message"..
How can i, with out BPM?
Thanks
Prabhakar

i have soap(Sync) to File(Async) synario...Soap response can have like this "PI system received message"..
If the SOAP is mandatorily working in SYNC mode then the above solution wont work (SOAP --> XI --> SOAP)....this will be treated as two different calls for the SOAP and the solution would have worked for ASYNC flow.
Why do you need PI system received message .... if i send a SOAP message and if it is successfully send from the SOAP application then I would get a 200 OK message which would indicate that everything was fine till sending the message to the XI/ PI system.
If SYNC communication is needed then implement a BPM with a SYNC-ASYNC bridge.
Regards,
Abhishek.

Sync - async w/o BPM

I have a scenario where a Bapi functionality(server proxy) is exposed as a webservice .
So scenario will be SOAP -> XI -> Proxy (calls a BAPI).
I was thinking of:
Receiving the call from WS consumer Synchronously and send him back the ACK (just transport level) and end the sync call. Then fwd this request to R3 using Async proxy...but w/o BPM.
Or can we have a Async call from WS consumer to Xi and from there to R3 proxy and some work around to send back transport level acknowledgement to WS consumer from XI async.
plz suggest...
XI Queries.

Hi,
I think you can handle in the sender client end. Check this note
Note 856597 - FAQ: XI 3.0 / PI 7.0 / PI 7.1 SOAP Adapter
It states :
Sender Asynchronous Calls
Q: What are the correct sender options for asynchronous calls?*
A: The setting in the channel configuration determines how the message is passed to the XI infrastructure. Setting the channel's quality of service to ExactlyOnce guarantees the delivery of the message exactly once between the adapter and the back end. This will not automatically guarantee the delivery with exactly once between the client and the back end. The behavior of the client determines the level of quality of service achieved.
When the client sends a SOAP message and ignores the response completely as in "fire-and-forget", the quality of service with AtMostOnce may be realized.
When the client sends a SOAP message and checks if the response is an HTTP 200 response message with an empty soap envelope or an HTTP 202 response message with no content, the quality of service with AtLeastOnce can be realized. In this case, the client must resend the message until such a successful response is returned. When the message successfully accepted by the adapter, an HTTP 200 response with an empty SOAP envelope or an HTTP 202 response message with no content is returned.
When the client resends the message, there is a possibility that the message may arrive more than once. However, this possible duplicate only happens, when the client previously received no response message at all.For all other cases, the client can resend the message without resulting any duplicate. In order to eliminate duplicates for all cases, the client may send the message with a unique message ID. This message ID will be used to create an XI message so that the identity of the created XI message and that of the original SOAP message are coupled.The client must resend the message with the same message ID, until, a HTTP 200 response with an empty soap envelope/HTTP 202 without content is received as an acknowledgement and client would not get the DuplicateMessageException in this regard.In either case, the client can assume that the message is delivered exactly once (theoretically the message ID could be identical to another message ID used previously but the probability of this is extremely low).
Regards
Suraj

Sync Java Proxy Server response in XML

Hi !
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But, is there any alternative to pass the received XML from the HTTP directly to XI, and map that XML structure with the File2 message type using graphical mapping ? instead of programming the xml parsing and creating the response structure?
If we create a message type for the response of the java proxy, as 1 field that contains the whole XML code, then we would not map it....Is there any way to complete or to add something to the received XML code, to convert it to the XI message format..so XI could interpret it as a true XI message and map it transparently via graphical mapping?
Thanks,
Matias

Hi Akshay !
That's exactly what I don't know how to do it.
Inside the java proxy function I have a string variable, let's call it xmlResponse, that contains:
<customer>
<name>Matias</name>
<country>China</country>
</customer>
I also have a message type created in XI (let's call it MT_Response), that has the same fields as the above message structure. And my java proxy function is declared something like this:
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String xmlResponse="";
// http connection code goes here..
xmlResponse = httpConnection.getResponse();
return ??????? what ????
I don't want to parse the xmlResponse variable in order to fill the MT_Response structure. I need a more direct way, because the content of xmlResponse is already XML !
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SYNC/ASYNC - Proxy to File

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