(semi-continuation of A Tale of Two Migrations)
Before I get into the trials and tribulations of dealing with the inevitable custom implementations that are part of every WebLogic Portal application that is older than a year and has more than 5 pages (and there are newer, smaller apps with more customizations, trust me on that), it is best to look at some basics. In the path taken by this blog series we are using WSRP with the retiring WebLogic Portal (WLP) application as the producer and WebCenter Portal (WCP) as the migration target and WSRP consumer. It is definitely of value to review the standard documentation about how to configure this standards-based integration, which can be found for 10.3.6 at http://docs.oracle.com/cd/E41236_01/wlp.1036/e14235/chap_webcenter_interop.htm/ .
With all of the useful points provided in the documentation, the one point that I would like to add is to first start with upgrading your WebLogic Portal application and environment to the latest version. I am a strong proponent of not upgrading unless there is a clear value in doing so, and in this case there are several. One is that a migration from WLP to WCP is almost definitely going to require at least one (and most likely several) Oracle Support cases to complete. You will hear every time you open a case “please upgrade to the latest version”. I’m not a big fan of this approach, but since the goal of the project is to move everything to the WebCenter and all of the functionality will eventually need to be updated to the latest version as part of that process, it is worthwhile to get that out of the way now.
Another value of upgrading your WebLogic Portal before embarking on a staged migration is that with one of the release of WebLogic Portal 10.3.x from .2 or later (I didn’t know the specific version, am too lazy to go look it up, and don’t feel bad about that because it is moot at this point in time) and the corresponding WebCenter Portal release (see previous parenthetical comment) the WSRP engine was moved from the portal framework to the application server (WebLogic Server). This makes a great deal of sense since WebLogic Server has had a WSRP engine for quite some time (again, not doing the historical research for the curious). Since the underlying WSRP support is coming from the application server, it makes good sense to have the same engine on both sides of the tractor-pull known as WSRP. While it may not be entirely necessary between some versions (I strongly suspect –but have no proof- that this is the case between 10.3.5 and 10.3.6), it eliminates one point in the long chain that will eventually be examined in detail for the source of some unexpected result or other, so why not get it out of the way now?
Finally, WebLogic Server is still the gold standard of J2EE application servers and does continuously improve with each release (disclaimer: I have not worked with the 12c versions and am just hoping that they have not proven me wrong). So why not start off with the best foundation possible before dealing with the known risk of every migration which is that there will be unknown and unforeseen issues that arise.
In my case I pushed for the WebLogic Portal and Server upgrade to 10.3.6 because WebCenter 220.127.116.11 had just been released with its capability of including the MAR within the EAR, a major time and hassle saver. WebCenter 18.104.22.168 was release with no support for WebLogic Server 10.3.5, which explains the “coincidence” of WebLogic Portal 10.3.6 coming out two weeks before hand. Interestingly enough, development on WCP 22.214.171.124 is done with JDeveloper 126.96.36.199 which is only configured to work with WebLogic Server 10.3.5. Ah, if Fox Mulder were only a software engineer instead of an FBI agent