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Interesting Links, 22 January 2016

  • Every so often you need to see exactly what headers your HTTP-based application is working with. One way to look at the HTTP headers is to use an HTTP proxy: possibilities in this space include Fiddler, Charles Proxy, and Paros Proxy (with Paros’ website being the Sourceforge project site, which isn’t very confidence-inspiring). There are certainly others (feel free to send them to me, if you’ve used one you like!). You can also use Wireshark if you need to examine all network traffic, but for HTTP Wireshark’s a bit of overkill.
  • Picking correct Java executors for background tasks, by ZeroTurnaround (makers of JRebel), goes into how (and why) you would choose specific Executors. Good reading, spoken as one who more or less uses Executors.newFixedThreadPool(int) by default.
  • Use JUnit’s expected exceptions sparingly, from the JOOQ blog, talks about a feature I love from TestNG: the ability to expect exceptions from a test, as opposed to a try/catch block that uses fail() to fail the test if an exception isn’t thrown. The JOOQ people argue against using expected exceptions, and if you’re using JUnit, they’re right. TestNG, of course, has a better alternative as usual.
  • Auditing with JPA, Hibernate, and Spring Data JPA discusses writing audit data with basic JPA (which looks like a pain, relying on JPA lifecycle events) and both Hibernate Envers and Spring Data JPA. Spring Data JPA and JPA have difficulty auditing removals; Spring Data JPA has integration with Spring Security; Hibernate Envers is probably the least intrusive, but doesn’t have Spring Security integration.

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