I would like to introduce a recommended library to use when implementing microservices in
This time, I selected the library based on the following three points.
RESTful APImicroservices that send and receive via
Gson / Jackson
Since microservices operate in cooperation with multiple services, messages are exchanged. In that case, format conversion is important.
I think that there are many conversions between
Java (object) and
Json, but Gson is often used (supported) in other libraries. gson) and Jackson.
Whichever you like, please.
However, for example, a library uses
Jackson as a stack (it has a dependency), but using
Gson includes two types of libraries for the same purpose (format conversion). It is not preferable because it becomes. Looking at the stack as a whole, you should select
Jackson in this case.
Bean Validation (JSR-303) that checks the input by adding a special annotation is easy.
Bean Validation is a specification, an implementation library is required to use it.
Hibernate-validator is a well-known implementation library, so we recommend that you use it.
When running on a
Java EE server, you have the option of not using
hibernate-validator because the implementation of
Bean Validation is also on the server.
This time, we are introducing
hibernate-validator in consideration of microservices that can be operated even in a normal Java process. ** **
I think that the number of cases where
KVS (Key Value Store) is used as a cache has increased.
The most commonly used of
Redis, and the famous Java client is Jedis.
Paho is a well-known client of
We provide libraries for various programming languages such as
Java, .net (C #, VB.net), Python, etc.
(I also use
Paho when using
MQTT in programming languages other than