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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Dealing with client headers
Let's say you want to specify credentials in the HTTP authorization header to a secure remote service, but you do not want to have a string authHeader parameter in the client interface method. The MP-RC @ClientHeaderParam annotation can be used to specify HTTP headers that should be sent without altering the client interface method signature.
The following example illustrates two uses of the @ClientHeaderParam annotation to provide a User-Agent HTTP header in a variation of the WorldClockApi interface:
WorldClockApiWithHeaders.javapublic interface WorldClockApiWithHeaders { static final String BASE_URL = "http://worldclockapi.com/api/json"; default String lookupUserAgent() { Config config = ConfigProvider.getConfig(); ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.