Support Forums: Message List - A beginners guide to Dependency Injection http://www.theserverside.com Most recent forum messages en Jive Forums Silver 5.5.30 (www.jivesoftware.com) Tue, 21 May 2013 20:23:04 -0400 Finally, someone that understands "program to an interface, ..." http://www.theserverside.com/discussions/thread.tss?thread_id=34167
Indeed, the GoF were talking about situations with multiple implementations for the same abstraction, in which case it's obvious that one should "program to the interface, not...]]> Sat, 06 May 2006 22:23:18 -0400 Sat, 06 May 2006 22:23:18 -0400 Sat, 06 May 2006 22:23:18 -0400 May 6, 2006 Rogerio Liesenfeld 0 Dependency Injection vs Service Locator http://www.theserverside.com/discussions/thread.tss?thread_id=34167 Tue, 30 Aug 2005 11:22:51 -0400 Tue, 30 Aug 2005 11:22:51 -0400 Tue, 30 Aug 2005 11:22:51 -0400 Aug 30, 2005 Jean Andriamalala 0 Dependency Injection in J2EE 5.0 http://www.theserverside.com/discussions/thread.tss?thread_id=34167 Mon, 11 Jul 2005 08:34:45 -0400 Mon, 11 Jul 2005 08:34:45 -0400 Mon, 11 Jul 2005 08:34:45 -0400 Jul 11, 2005 Duncan Mills 0 Programming to Interfaces http://www.theserverside.com/discussions/thread.tss?thread_id=34167
I think the real reason frameworks like Spring, JMock, EasyMock, etc encourage you to use interfaces is that at least in their early versions they were using the JDK proxy API, which only works with interfaces.
This...]]> Thu, 07 Jul 2005 13:06:41 -0400 Thu, 07 Jul 2005 13:06:41 -0400 Thu, 07 Jul 2005 13:06:41 -0400 Jul 7, 2005 Stephen Molitor 0 Programming to Interfaces http://www.theserverside.com/discussions/thread.tss?thread_id=34167 I think the real reason frameworks like Spring, JMock, EasyMock, etc encourage you to use interfaces is that at least in their early versions they were using the JDK proxy API, which only works with interfaces. This is not the...]]> Thu, 07 Jul 2005 13:01:00 -0400 Thu, 07 Jul 2005 13:01:00 -0400 Thu, 07 Jul 2005 13:01:00 -0400 Jul 7, 2005 Rod Johnson 1 Dependency Injection in J2EE 5.0 http://www.theserverside.com/discussions/thread.tss?thread_id=34167 Dependency Injection and J2EE 5.0 to know how dependency injection will be supported in J2EE 5.0.

Also you can try out the dependency...]]> Thu, 07 Jul 2005 12:52:28 -0400 Thu, 07 Jul 2005 12:52:28 -0400 Thu, 07 Jul 2005 12:52:28 -0400 Jul 7, 2005 Debu Panda 1 isn't the world static :) http://www.theserverside.com/discussions/thread.tss?thread_id=34167 When I see people say "just use statics" I cringe; statics are dangerous in a threaded environement, especially inside an application server. They get in the way of redeployment, undeployment, and GC.
sorry,...]]> Thu, 07 Jul 2005 12:29:20 -0400 Thu, 07 Jul 2005 12:29:20 -0400 Thu, 07 Jul 2005 12:29:20 -0400 Jul 7, 2005 peter lin 2 HiveMind Descriptor http://www.theserverside.com/discussions/thread.tss?thread_id=34167
<?xml version="1.0"?>
<module id="com.dnene.ditutorial.hivemind" version="1.0.0"...]]> Thu, 07 Jul 2005 12:28:29 -0400 Thu, 07 Jul 2005 12:28:29 -0400 Thu, 07 Jul 2005 12:28:29 -0400 Jul 7, 2005 Howard Lewis Ship 0 But why would I want to use this? http://www.theserverside.com/discussions/thread.tss?thread_id=34167
The value of Spring and HiveMind is the almost invisible value-adds:

Thread safety is...]]> Thu, 07 Jul 2005 12:24:24 -0400 Thu, 07 Jul 2005 12:24:24 -0400 Thu, 07 Jul 2005 12:24:24 -0400 Jul 7, 2005 Howard Lewis Ship 3 Programming to Interfaces http://www.theserverside.com/discussions/thread.tss?thread_id=34167 However, I think Spring always allowed for proxying by class and by interface, so I don't believe that they made any decisions because of the Proxy.
That's good to know. I retract my earlier statement!
Worst...]]> Thu, 07 Jul 2005 12:13:26 -0400 Thu, 07 Jul 2005 12:13:26 -0400 Thu, 07 Jul 2005 12:13:26 -0400 Jul 7, 2005 Stephen Molitor 1 A beginners guide to Dependency Injection http://www.theserverside.com/discussions/thread.tss?thread_id=34167 I don't get why pico container and several others IoCCs use component interface as a service(component) identifier. In my view several different services(components) may be specified by the same interface, e.g. Runnable. How these frameworks...]]> Thu, 07 Jul 2005 12:08:27 -0400 Thu, 07 Jul 2005 12:08:27 -0400 Thu, 07 Jul 2005 12:08:27 -0400 Jul 7, 2005 Howard Lewis Ship 0 Programming to Interfaces http://www.theserverside.com/discussions/thread.tss?thread_id=34167
So while programming to interfaces rather than classes is a well-known best practice dating back years (advanced in the GoF book and elsewhere)....
This is nitpicking (and getting off topic), but the GoF were not...]]> Thu, 07 Jul 2005 11:32:14 -0400 Thu, 07 Jul 2005 11:32:14 -0400 Thu, 07 Jul 2005 11:32:14 -0400 Jul 7, 2005 David McCoy 2 Programming to Interfaces http://www.theserverside.com/discussions/thread.tss?thread_id=34167 So while programming to interfaces rather than classes is a well-known best practice dating back years (advanced in the GoF book and elsewhere)....

This is nitpicking (and getting off topic), but the GoF were not advocating...]]> Thu, 07 Jul 2005 11:18:29 -0400 Thu, 07 Jul 2005 11:18:29 -0400 Thu, 07 Jul 2005 11:18:29 -0400 Jul 7, 2005 Stephen Molitor 5 String service ids in pico http://www.theserverside.com/discussions/thread.tss?thread_id=34167 I don't get why pico container and several others IoCCs use component interface as a service(component) identifier. In my view several different services(components) may be specified by the same interface, e.g. Runnable.
This...]]> Thu, 07 Jul 2005 10:41:01 -0400 Thu, 07 Jul 2005 10:41:01 -0400 Thu, 07 Jul 2005 10:41:01 -0400 Jul 7, 2005 Stephen Molitor 0 But why would I want to use this? http://www.theserverside.com/discussions/thread.tss?thread_id=34167 Why not use a Java class ie JavaDefaultContext with a lot of getters which do exactly the same thing as the <bean> tags do in a applicationContext.xml - instantiating and wiring.&nbsp;
Does this do anything for...]]> Thu, 07 Jul 2005 08:05:18 -0400 Thu, 07 Jul 2005 08:05:18 -0400 Thu, 07 Jul 2005 08:05:18 -0400 Jul 7, 2005 Dave Hewitt 0