12/11/2015 OSB 12c Database Polling using DB adapter Oracle Fusion Middleware Blog

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OSB 12c - Database Polling using DB adapter

Oracle introduced couple of new features in 12c version which is recently launched. For OSB, the major shiftthat we saw in 12c is that now we can use Jdeveloper to do the development which we use to do throughOEPE (Eclipse). With that change, we can leverage the existing technology adapter in OSB as well which weuse to have in SOA. In OSB 11g version, in case of Database interaction, we use to create DB adapter inJdeveloper and later import all required files to OEPE and generate required services from that, but in thisnew version12c as we development in Jdeveloper itself so we need not to follow same steps again, we canadd the DB adapter directly in OSB project and do required operations.

In this post, we show you how to use DB adapter in OSB project. For that we have created a table indatabase, we poll the data from that table and write that information to one file.First of all we need to create a new OSB project, so first create a new project and then in composite.xml file,right click on proxy service lane, choose “Insert Adapters” and select Database to add DB adapter.

Provide name to adapter and click on next. In next window, choose DB connection (In our case it is local aswe read the data from local table) and click on browse button to select the outbound connection poolcreated earlier for DB adapter. This search feature is a new feature that is introduced in 12c, with this featurewe can go to server and select the outbound connection pool; we can even create new connection pool withthis option.

In next window, choose “Poll for new or changed records in table” operation type as we need to poll the newor updated records then select the table from where we need to poll the record and also select primary keycolumn. Also choose the column based upon that we need to read the record and select read & unreadcolumn values.

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12/11/2015 OSB 12c Database Polling using DB adapter Oracle Fusion Middleware Blog

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Once you complete all above steps, then you see DB adapter gets added to the composite but you see oneissue in that adapter as we haven’t added the pipeline yet. To add pipeline, right click on middle panechoose Insert Pipeline.

Provide pipeline name and in service type choose “Any SOAP” as we will get the data in soap format fromDB adapter. Ensure that “Expose as a proxy service” checkbox is unchecked as we already have proxyservice created using DB adapter, if you keep that checked then you will notice that it will add one moreproxy in the same composite.

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Now you can add wire DB adapter with pipeline. Then add file adapter to write the file and wire it to pipeline.Now go inside the pipeline and add route node after the start node in message flow. Add routing actioninside route node, in routing select the write file adapter business service .

Add new record to source table and you notice that data successfully picked from that table and writtento target file.

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Unknown October 30, 2015 at 9:21 AM

Very good explanation..

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