August 2019
Intermediate to advanced
256 pages
6h 43m
English
book
Hands-On Enterprise Java Microservices with Eclipse MicroProfile
by Cesar Saavedra, Heiko W. Rupp, Jeff Mesnil, Pavol Loffay, Antoine Sabot-Durand, Scott Stark
Content preview from Hands-On Enterprise Java Microservices with Eclipse MicroProfile
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Chapter 3
- The default sources of configuration properties are environment variables, Java system properties, and the META-INF/microprofile-config.properties file.
- You can provide a custom ConfigSource implementation that maps property names to values in the custom source.
- Strings are not the only supported types, as MP-Config supports type conversion via a pluggable SPI, and provides several default conversions by default.
- You do not need to provide a value for an injected property if you have given a defaultValue, or have injected the property as an Optional<?> value.
- Complex property types can be handled using a custom Converter<?> implementation that takes a string and returns the complex type.
- When an annotation is specified at the class ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.