Sycn/Async Bridge?

[Former Member]

Hi Experts,

Can anyone explain me the importance of Sync/Async bridge and in which type of scenarios it is mostly used.....plz suggest any web blog which explains in detail abt Sync/Async bridge.........

Cheers

Faisal

Points will b rewarded for useful answers.....

[former_member556603 · Accepted solution]

Hello Abdul,

Defining Sync/Async Communication

Use

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.

BPM is an additional advantage of Netweaver XI. it provides features like Sync-Async Bridge, Async-Sync Bridge, stateful msgt processing.....so on.

Sync-Async Bridge acts as a bridge between a synchronous Business system and Asynchronous business system.

forex: if u r communicating with a synchronous RFC to a File system(always asynchronous, which is not able to send any response to synchronous RFC Interface).

In this kind of scenarios BPM Sync-Async Bridge enables communication between a Synchronous RFC to Asynchronous File system or vice versa..

Sync/async communication enables a synchronous sender system to communicate with a receiver system that cannot process synchronous messages

Plz go thru the following:

/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

https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] - Use of Synch - Asynch bridge in ccBPM

Asyn - Synch BPM - /people/sudheer.babu2/blog/2007/01/18/asyncsync-communication-using-jms-adapter-without-bpm-sp-19

http://help.sap.com/saphelp_nw70/helpdata/en/83/d2a84028c9e469e10000000a1550b0/content.htm

http://help.sap.com/saphelp_nw70/helpdata/en/43/65d4dab39b0398e10000000a1553f6/content.htm

Example on Sync/Async communication:

http://help.sap.com/saphelp_nw04s/helpdata/en/43/65d4dab39b0398e10000000a1553f6/frameset.htm

Thanks,

Satya Kumar

Reward points if it is useful..

Edited by: SATYA KUMAR AKKARABOYANA on Apr 18, 2008 3:00 PM

[Former Member]

Hi Abdul,

We use Sync/Async bridge to establish the Sync communication between the Applications.

Normally the Technical adapters like File will not support the Sync communication to send back the Response to the Sender system from the File system.

So in this case we will use Sync/Async bridge to establish the connection using BPM.

Check these

Bridging the Sync-Async bridge with Fork (XI)

/people/ravikumar.allampallam/blog/2005/02/17/bridging-the-sync-async-bridge-with-fork-xi

Use of Synchronous-Asynchronous Bridge to Integrate Synchronous and Asynchronous systems using ccBPM in SAP 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

Regards

Seshagiri

[Former Member]

Hi,

Refer this.

Refer the below SAP -Help .

http://help.sap.com/saphelp_nw70/helpdata/en/83/d2a84028c9e469e10000000a1550b0/content.htm

http://help.sap.com/saphelp_nw70/helpdata/en/43/65d4dab39b0398e10000000a1553f6/content.htm

Check this thread

Example on Sync/Async communication:

http://help.sap.com/saphelp_nw04s/helpdata/en/43/65d4dab39b0398e10000000a1553f6/frameset.htm

Regards,

Sarvesh

[Former Member]

Hi,

Sync/ Async bridge are generally used to create the Dummy response, to full fill the requirment of response back to the Synchronous Adapters.

For e.g. while working on RFC to File or SOAP to File you might have to get the response back to RFC or SOAP side but File is the asynchronous scenario so you can't be able to send any response form File adapter. Thus you need to create dummy response for this with the help of BPM.

/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

https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] [original link is broken] - Use of Synch - Asynch bridge in ccBPM

Now this kind of bridge is possible without BPM also..you can use of the ResponseNotifyBe adapter module to server this purpose.

Refer the way it is used for JMS adapter.

Async/Sync Communication using JMS adapter without BPM (SP 19)

/people/sudheer.babu2/blog/2007/01/18/asyncsync-communication-using-jms-adapter-without-bpm-sp-19

without BPM

/people/henrique.pinto/blog/2007/08/02/syncasync-scenarios-without-bpm

without BPM1

/people/venkataramanan.parameswaran/blog/2007/01/18/syncasync-communication-in-jms-adapter-without-bpm-sp19

Refer similar discussions

https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1403 [original link is broken] [original link is broken] [original link is broken] [original link is broken]

/people/sriram.vasudevan3/blog/2005/01/11/demonstrating-use-of-synchronous-asynchronous-bridge-to-integrate-synchronous-and-asynchronous-systems-using-ccbpm-in-sap-xi

/people/ravikumar.allampallam/blog/2005/02/17/bridging-the-sync-async-bridge-with-fork-xi

Thanks

Swarup

Edited by: Swarup Sawant on Apr 18, 2008 2:55 PM