December 2017
Intermediate to advanced
468 pages
13h 12m
English
It may be a good idea to expose legacy system as a service, especially when the legacy context needs to be consumed by multiple new contexts. This pattern is also known as the open host pattern.

Each new context still has to translate the response from the legacy to its internals; however, with simplified open host APIs, one can mitigate the translation complexity.
With this pattern, there is a need for some modifications to the legacy context (unlike the bubble context); also, standardization of consumable API SLAs may be challenging as it has multiple consumers.
We can clearly justify that a lot of legacy systems in the ...
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