Doubt on Sync-asynch Bridge

hi all,
I was trying to understand the sync-asynch bridge concept and from what all i have read i have come to know that there is a sync-asynch and also asynch-sync bridge.This is used in a scenario say file-rfc-file.But i have done the same scenario without the bridge.I am still not clear where this bridge will fit into.
Can anybody please explain me with suitable examples..
thanks,
Nisheeta

Hi,
File-RFC-file is Async-sync communication. There is nothink like async-sync bridge in BPM. Because for this, 3 steps are needed
1. Receive - async
2. send - sync
3. send - async
But for Sync-async scenario, a Sync-async bridge should opened using receive step.
Example : Http request - File && File - Http response
Steps:
1. Receive - open sync-async bridge --> To receive Http request
2. Send - async --> To send message to File adapter.
3. Receive - async --> To receive message from File adapter
4. Send - close sync-async bridge --> To send Http response
Example : http://help.sap.com/saphelp_nw04/helpdata/en/83/d2a84028c9e469e10000000a1550b0/content.htm
Hope this clears your doubt.
Regards,
Uma

Similar Messages

Doubt on Sync-Async bridge using BPM

Hi Experts,
 I had a doubt on Sync-Async bridge using BPM,
 1. If sender system is SAP system and receiver system is non-sap system then while configuring in Integration Directory how many Receiver Determinations should be done ?
2.Plz explain if we have 2 receivers i.e one sender SAP system and 2 non-sap systems then what will be the no. of receiver determinations?
3.How we have to count no. of receiver determinations if we have 2 receivers and 1 receiver system? If so what is the no. of receiver determinations in case of 1 receiver syst and 2 receiver systems?
Plz clarify above questions good answers will be definetly rewarded.
 Regards,
 Vinod.

vinod,
... Sync-Async bridge and Recievr determination are not related....
Sync-Async bridge means.. u r sending some request syncronously...and u r expecting the response also in synchronous way... but u r not getting the response directly...u r getting it via BPM..i.e asynchornously.....
see here what is the Use of Synch - Asynch bridge in ccBPM
/people/sriram.vasudevan3/blog/2005/01/11/demonstrating-use-of-synchronous-asynchronous-bridge-to-integrate-synchronous-and-asynchronous-systems-using-ccbpm-in-sap-xi
and here if u have 2 reciver... u have to create 2 receiver determination and ofcourse for BPM one reciver dtrmination is required.... since in BPM related scenario BPM will act as a reciver...BPM(IP) wil first recive the message then it will be forwarded to Receiver system!!! so total 3.
3.How we have to count no. of receiver determinations if we have 2 receivers and 1 receiver system? If so what is the no. of receiver determinations in case of 1 receiver syst and 2 receiver systems?
r u telling that u r having two recivers and each receiver is receiving messages using 2 interaces???
u have 2 use 2 receiver determination and 4 interface determination.
regards
biplab

Sync - Async Bridge: a Doubt

HI ,
Can you confirm if my understanding below is correct:
Sync System calls Asynch : Sync-async bridge to be used I understand
But for Async to sync , no Sync-async bridge is required and we can discard the response or do anything with it.
Thanks,
Himadri

just adding up to the discussion
But for Async to sync , no Sync-async bridge is required and we can discard the response or do anything with it.
we build async-sync relationship for getting/tracking the response. Say ur sender JDBC does an action in R3 and the reponse from R3 need to be updated in a file or a table in a DB then u build this kind of relation ship.
Ps: Award points to all helpfull replies.

Doubt Sync-Async Bridge:

Hi,
Do we have Sync-Async Bridge and also Async-Sync Bridge in BPM ?
Regards,
siva

Hi Dhanush,
There are both kind of bridge.
1. Sync-Async Bridge is used with BPM.
2. Async-Sync Bridge can be used with/without BPM.
Prerequisites:
Good knowledge of basic XI features.
Good knowledge of RFC/tRFC concepts.
Good knowledge of BPM architecture and concepts.
Example to understand Async-Sync Bridge.
Suppose from the calling side, the HTTP request arrives as an asynchronous document into XI. As a result, it is persisted immediately in XI and the calling application can move on. On the receiving end we would like to call the BAPI synchronously because the PO number will be immediately returned. This is referred to as an asynchronous-synchronous bridge. Then we would like to send this response, containing the PO number, asynchronously to an external legacy system.
Regards,
Sarvesh

Sync-async bridge doubts ...

Hi everyone.
I've developed a sync async bridge fro this scenario ..
sync abap proxy (request) -
> XI -
> abap proxy (BW response)
I've developed the BPM as XI pattern about sync-async bridge.
Problem is that i don't have the configuration part of the patern so that's what i've done.
i have a business service as sender, that. This BPM has a transformation step between the receive step that opens the bridge and the send step that closes the bridge.
i have a receiver determination with business service as sender and BPM as receiver.
when i test the scenario i get the error that no receiver determination found.
i need some help for this.
Regards,
Inigo.

Hi,
For the ABAP proxy as the sender you should not use a business service, You need to create a WebAsABAP bsuiness system pointing to your Client of the R3 system and use this as the sender service.
If you have done this, check the details of the message in MONI.What is the Sender Service, Sender Interface and sender Namespace. have you create the Receiver Determination for these values?
Regards
Bhavesh

BPM - Receive Sync/ASync Bridge Problem

Hi,
I am creating a scenario for an inbound Synch request to be serviced by a BPM process.
Here is the problem that I am facing while trying to configure the Receive Step
- I created a Message Interface defined as Abstract Synchronous.
- I created a process model and put in a Receive Step: Mode - Opens S/A Bridge, Synchronous Interface - defined as above.
- I define a container with Abstract type. But when I try to locate the above defined Abstract Synch message interface, I cannot find it.
- As a workaround, I create another Abstract Message Interface defined as Abstract ASynch.
- I create a container with this Abstract ASynch message type.
- I use this container in the Receive Step.
But activating the Business Process gives the error:
Message to be received and Synchronous Interface do not have identical types.
Can someone give me the correct procedure to configure the Sync / ASync Bridge ? thanks,
-Manish

Dan,
This is the link you are looking for?
http://help.sap.com/saphelp_nw04/helpdata/en/83/d2a84028c9e469e10000000a1550b0/frameset.htm

BPM correlation and Sync-Asyn Bridge....

Regarding Sync-Asyn ,I have gone thru these blogs...
Demonstrating Use of Synchronous-Asynchronous Bridge to Integrate Synchronous and Asynchronous systems using ccBPM in SAP Xi - Use of Synch - Asynch bridge in ccBPM
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] - Use of Synch - Asynch bridge in ccBPM
I am not able to do a end to end scenario...using this ....So could any one give me a step by step guide for the syn-asyn Bridge.
And also step by step for correlation...
Please help me in this regard....

Hi,
Defining Sync/Async Communication
To enable the communication between a synchronously calling business system (synchronous outbound interface) and an asynchronously called business system (asynchronous inbound and outbound interface), you can define a sync/async bridge in an integration process. You can only define one sync/async bridge for each integration process.
You can also achieve sync/async communication by using the JMS adapter. If you do not have any particular demand for monitoring or for troubleshooting, SAP recommends that you use sync/async communication in the JMS adapter instead. The advantage of using the JMS adapter over synch/async communication using an integration process is a significant increase in system performance.
See: Async/Sync and Sync/Async Bridge in JMS Adapter
Structure of a Sync/Async Bridge
The following table outlines the minimum components of a sync/async bridge:
Step
Use
Receive step to open the sync/async bridge
Receives the message request from the synchronously calling business system and opens the sync/async bridge
Asynchronous send step
Sends the received message asynchronously to the asynchronously called business system
Receive step
Receives the message from the asynchronously called business system
Send step to close the sync/async bridge
Sends, for example, the response from the asynchronously called business system to the synchronously calling business system
Performance Considerations
If you insert additional steps in the sync/async bridge, the synchronous time is increased correspondingly. If the time that elapses before the sync/async bridge is closed is too long, this can lead to problems.
Fault Messages
It is currently not possible to send fault messages back to the synchronously calling business system. If you want to return error statuses to the synchronously calling business system, you can define a field for an error indicator in the message that is sent to the synchronous interface.
Procedure
Define a Receive Step to Open the Sync/Async Bridge
       1.      Insert the receive step to open the sync/async bridge in the integration process.
You can do this at the following points:
○       Directly after the start marker
○       As the first step in a block if the block is the first step of the integration process and if it has the mode Standard
○       As the first step in a fork. If the fork already contains some starting receive steps, the Start Process indicator is automatically reset for these steps.
       2.      In the object area, define the container element that receives the synchronously sent message.
Specify an asynchronous, abstract interface in the container element. The message must correspond to the request message of the synchronous interface used to receive the message.
       3.      Select this container element in the Message field in the properties area of the receive step.
       4.      In the Mode field, select Open S/A Bridge.
       5.      Select the Start Process field.
The receive step to open the sync/async bridge must start the integration process. There must be no other receive steps to start the integration process.
       6.      Specify the synchronous interface for receiving the message from the synchronously calling business system. The message type of the message to be received and the request message from the synchronous interface must be identical.
Define an Asynchronous Send Step
       7.      Insert a send step that sends the received message asynchronously to the asynchronously called business system.
See also: Sending Messages from Integration Processes Asynchronously
Define a Receive Step
       8.      Insert a receive step that receives the message from the asynchronously called business system.
Define a Send Step to Close the Sync/Async Bridge
       9.      Insert the send step at the required position in the process definition.
Do not insert the send step in a loop, block, or fork.
   10.      In the Mode field, select Close S/A Bridge.
The integration process must not contain any further send steps to close a sync/async bridge.
   11.      In the Opened By field, specify the receive step that opened the sync/async bridge.
   12.      In the message field, specify the message that is sent to the synchronous interface.
This message must be of the same type as the response message from the synchronous interface that you specified in the opening receive step.
Example
You can find an example of a sync/async bridge in the Integration Repository under SAP Basis à SAP Basis 6.40, namespace http://sap.com/xi/XI/System/Patterns under BpmPatternSyncAsyncBridge.
For a description of the example, see Example: Sync/Async Communication.
Reg,
suresh

Sync/async bridge and proxy

Hi all. I am going to implement a sync/async bridge in the following scenatio:
JMS -> XI -> PROXY -> R/3
My question is how to hold the sync connection in R/3 using the Proxy class. Should i make a call from my inbound proxy class to the outbound proxy class, when returning data?, and if so, how is the sync connection being hold?
Thanks
/Thomas

Hi Thomas,
Just go thru links given below ur doubt will be cleared:
Synchronous Proxies:
Outbound Synchronous Proxy
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/profile/abap%2bproxy%2boutbound%2bprogram%2b-%2bpurchase%2border%2bsend
Inbound Synchronous Proxy
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/profile/abap%2bproxy%2binbound%2bprogram%2b-%2bsales%2border%2bcreation
go thru the weblog /people/vijaya.kumari2/blog/2006/01/26/how-do-you-activate-abap-proxies which explains how to activate proxies
Regards,
Vinod.

. Why we use Sync-Async bridge? .

Why we use Sync-Async bridge?

Dear Manoj,
http://help.sap.com/saphelp_nw04/helpdata/en/55/c5633c3a892251e10000000a114084/content.htm
A distinction is made between synchronous and asynchronous communication for both imported interfaces and message interfaces. You define the mode of communication when you define an interface:
· In the case of synchronous communication, a response message is expected from the receiver after a request has been sent. Once the request message has been sent, no further messages can be sent until the response to the request has arrived back at the sender system.
· However, in asynchronous communication a (immediate) response is not expected. A sending process can send multiple messages to a receiver in a bundle and then continue executing the process.
You would use Synch - Asynch Bridge to enable the communication between a synchronously calling business system (synchronous outbound interface) and an asynchronously called business system (asynchronous inbound and outbound interface), you can define a sync/async bridge in an integration process. You can only define one sync/async bridge for each integration process.
Regards,
Naveen.

Correlation and Sync Asyn Bridge

Regarding Sync-Asyn ,I have gone thru these blogs...
Demonstrating Use of Synchronous-Asynchronous Bridge to Integrate Synchronous and Asynchronous systems using ccBPM in SAP Xi - Use of Synch - Asynch bridge in ccBPM
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] - Use of Synch - Asynch bridge in ccBPM
I am not able to do a end to end scenario...using this ....So could any one give me a step by step guide for the syn-asyn Bridge.
And also step by step for correlation...
Please help me in this regard....
<Moderator note: thread locked. I moved your last post to XI, please do not post duplicate questions>
Edited by: Mike Pokraka on Jul 7, 2008 1:00 PM

Regarding Sync-Asyn ,I have gone thru these blogs...
Demonstrating Use of Synchronous-Asynchronous Bridge to Integrate Synchronous and Asynchronous systems using ccBPM in SAP Xi - Use of Synch - Asynch bridge in ccBPM
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] - Use of Synch - Asynch bridge in ccBPM
I am not able to do a end to end scenario...using this ....So could any one give me a step by step guide for the syn-asyn Bridge.
And also step by step for correlation...
Please help me in this regard....
<Moderator note: thread locked. I moved your last post to XI, please do not post duplicate questions>
Edited by: Mike Pokraka on Jul 7, 2008 1:00 PM

Synch/Asynch Bridge TimeOut

Hi,
I am sending data to R/3 system through XI and waiting for response. If the R/3 takes half an hour to respond will my Synch/Asynch bridge will be still waiting for the response or will it die because of TIME_OUT.
Can anyone let me know.
Regards,
Amar Nemalikanti

Hi,
There is a Time Out for the Sync/Async Communication.
The settings can be done SXMB_ADM -> Integration Engine Config -> Change Specific Config -> Add a new entry
Check the Category SA_COMM, see the help for its parameters.
By default the time out setting is 60 seconds and the maximum allowed is 1000 seconds.
Thanks & Regards,
Renjith.

Synch/Asynch Bridge

Hi all,
Can anyone tell me where exactly Synch/Asynch Bridge is used
Thanx,
krishna

Hi,
Sync/async communication enables a synchronous sender system to communicate with a receiver system that cannot process synchronous messages
Refer this blog
/people/ravikumar.allampallam/blog/2005/02/17/bridging-the-sync-async-bridge-with-fork-xi
/people/sriram.vasudevan3/blog/2005/01/11/demonstrating-use-of-synchronous-asynchronous-bridge-to-integrate-synchronous-and-asynchronous-systems-using-ccbpm-in-sap-xi
There is an example of the Sync/Async Bridge in th SWCV: SAP BASIS.
Namespace: http://sap.com/xi/XI/System/Patterns
The Integration Server receives 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.
As soon as a synchronous message is received from the sender system the process uses a special receive step to open the sync/async bridge, sends the received message to the receiver system asynchronously, and waits for the asynchronous response to arrive from the receiver.
The BPE 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.
This blog also should give you some idea...
https://www.sdn.sap.com/sdn/weblogs.sdn?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] [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
example of the Sync/Async Bridge in th SWCV: SAP BASIS.
Namespace: http://sap.com/xi/XI/System/Patterns
regards
Message was edited by:
Vijaya Lakshmi MV

Sync-Asyn Bridge

Hello friends,
Could any one give information or blog on Synch -Asyn Bridge used in HTTP --> RFC scenario

Hi,
Refer this..
https://www.sdn.sap.com/sdn/weblogs.sdn?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken]
BPM Sync- Async Bridge
Pipeline timeout error
/people/pooja.pandey/blog/2005/07/27/idocs-multiple-types-collection-in-bpm
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/e3d59c90-0201-0010-ac83-cfd0071f095a
Who to manage TimeOut in BPM ?
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/eb5cc090-0201-0010-5284-fd5376b01934
/people/sriram.vasudevan3/blog/2005/01/11/demonstrating-use-of-synchronous-asynchronous-bridge-to-integrate-synchronous-and-asynchronous-systems-using-ccbpm-in-sap-xi - Use of Synch - Asynch bridge in ccBPM
regards,
vasanth.

Dynamic configuration in Sync/Async bridge in JMS

Hi
Scenario:
Portal sending request to JMS MQ and getting Response using sync/Async Bridge.
I have to written a UDF which will capture the value for cust_uid from request mapping and store it in dynamic configuration
And when the response comes from JMS MQu2026.this value gets populated in response mapping.
I have tested the UDF in a dummy Soap2rfc scenario and its working fine.
But when used in Sync/Async Bridge, the dynamic configuration fails.
For Sync/Async Bridge, there are 2 channels 1) Sender JMS 2) receiver JMS.
The synchronous request is converted to an asynchronous request in the module processor and sent.
The asynchronous system sends a response to a sender adapter. In the module processor of the sender adapter, this response is forwarded to the module processor of the original receiver adapter, where it is sent as a synchronous response of the waiting synchronous request.
Please suggest
Regards
Abhijit

Hi Abhijit,
Okay, so your data extraction/insertion is working fine for a simple synchronous request responser call.
I suppose this is working fine because your receiver adapter copies some part of the request message (at least the dc header) to the response message. (But I don't think this always works for all the adapter types). It is not working for the sync-async bridge because there are two unrelated messages in this case.
In order to copy the dc header from the first message to the second message, I think you can use the DynamicConfiguraitionBean module to store the dc header value in the module data and use this module again to recover it and set it to the second message. The whole process is somewhat complicated, but I will sketch the approach below.
First, let's call the first use of DCB the store step and the second the recover step. These store and recover steps must take place in the same module sequence so that they can use the module data to pass data from the first message to the second message. Furthermore, the store step must occur after the cust_id value is extracted into the dc header. So, your configuration must be placed in the receiver adapter side. Assuming the request message with the filled dc header coming into the module sequence, the first DCB module can be placed before the ROB module to store the dc header value in the module data. And the second DCB module can be placed after the WRB module to recover the dc header value from the module data and set it the dc header of the response message.
I hope this will work.
Regards, Yza

Getting Time-Out Error in Sync-Async Bridge

Hi All,
My IP has a Sync-Async Bridge. I have a fork, two senders, two switchs and a transformation step inside the bridge.
If XI takes much time to process the IP, the send step that closes sync-async bridge is not waiting for the message after a particular period and throws time out error to the sender.
Is it possible to increase the waiting time for sync-async bridge?
This IP works correctly 8 out of 10 times. Sometimes the message is sitting permenantly in the queue(smq2) and gives me system failure error.
Can u tell me why this problem happening?
Thanks & Regards,
Senthil.

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 )
where we have 4 steps
sync receive - > async send -> async receive -> sync send..
i do understand that async send and async receive are combined through correlation
but i do not understand how do they work..
i mean when async send say send a file to a target system...does async receive reads a file from the same folder based on the corelation or wat...
basically can you pls explain me how do the steps 2 and 3 above work
Edited by: Tarang Shah on Mar 3, 2009 12:51 PM

Doubt on Sync-asynch Bridge

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