Java EE began with less than 10 individual specifications, but it has grown over time through subsequent updates and releases to encompass 34. Compared to microservices-based architectures, Java EE and its included specifications were originally designed for a different development and deployment model. Only one monolithic server runtime or cluster hosted many different applications packaged according to standards. Such a model runs opposite to the goal of microservices.
Most Java EE APIs are synchronous, and scaling these resources is done through thread pools. Of course, this has its limits and is not meant to be adjusted for quickly changing requirements or excessive load situations. Given these requirements, it appears as if Java EE isn’t the best choice for developing microservices-based architectures.
But the latest versions of Java EE added a ton of developer productivity to the platform alongside a streamlined package. With the sloping modularity of Java and the JVM, an established platform, and skilled developers alongside individual implementations, Java EE is considered to be a reasonable solution for microservices development.
Matching the Real World
The latest available Java EE specification as of the writing of this report is Java EE 7. It contains 34 individual specifications, as shown in Figure 4-1.
Figure 4-1. Java EE 7 at ...
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