OSB 11g - Access MDS in OSB

Oracle Service Bus does not support MDS so we can't use oramds: function in OSB as we can use it in SOA.

But we can use some alternative ways to access MDS from OSB. Below are the two ways to access MDS from OSB.

ACCESS MDS VIA HTTP

Suppose all the required artifacts are there in MDS and we want to use Item.xsd schema in OSB which is there in MDS under EnterpriseObjectLibrary folder .

Assume you have a SOA process “HelloWorld” deployed to SOA server, then you can access the above schema like below:

http://host:port/soa-infra/services/parition/HelloWorld/apps/EnterpriseObjectLibrary /Item/Item.xsd

Please note, "HelloWorld" can be a process that has nothing to do with your XSD file collections! In other words, you can use any other SOA process to access MDS artifacts. All of the XSDs in MDS can be accessed this way.

Cons:

•         Since we used full path which includes server host and port so when we move our code to respective environments then we have to change server host and port respective to server.
•         OSB project will be dependent on SOA server because all the artifacts will be accessible only when SOA server is up, when SOA server is down then we will not be able to access the artifacts as SOA process will also be down when SOA server is down through which we access MDS artifacts.

Registering MDS Artifacts with OSB (Import MDS Jar to OSB)

The MDS artifacts are shared project resources that must be uploaded for development of any project.

These common resources can be uploaded into the OSB using two approaches:

·          As a zipped file

·          As a jar file

The recommended approach is to register the MDS artifacts as a jar file.

MDS artifacts are subject to enhancements and these enhancements are usually applied as patches, or as new versions of the libraries. To update the existing MDS you must upload the updated artifacts into OSB and manage the enhancements. It is recommends that the artifacts be imported as a jar file into OSB. When enhancements/patches are to be applied, a new jar file with changed artifacts must be re-imported into OSB. Thus, the artifacts that require an update are replaced by the new ones in the new jar file.

Note: If you change or extend an Enterprise Business Object or an Enterprise Business Service, you need to re-import it into OSB. You can either import those artifacts alone or you can zip the whole library again and import. AIA recommends importing only those objects that have changed.

Note: It is assumed that a jar file with MDS artifacts is available. (This jar file is a service bus configuration file.) The following issue should be addressed by jar file

OSB can only create services from WSDLs that have either binding or port information in them. AIA recommends that binding information be added to the ESL (Enterprise Service Library) with SOAP as the binding.

The MDS artifacts library, imported into the OSB as a jar file, should have the all WSDL files updated with details of bindings before it is used for creating OSB services.

References: Guide to Implementing Application Integration Architecture on Oracle Service Bus

An Oracle White Paper

March 2011

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