Tweet Magnolia Tweet

Originally, I wanted to write about Magnolia-Twitter integration, but at some point I've realized such integration is so simple that there's no point writing about it. So instead, let's look how you can write custom commands for Magnolia. Anybody who seriously developed on Magnolia for while had to write a Command sooner or later. They are incredibly simple, yet very powerful. Part of it is that you can use commands just anywhere - call them from the context Menu in AdminCentral, invoke them from Groovy or BSH console, call them inside of the workflow, kick start them based on Observation and changes in repository or call them periodically via scheduler. The whole logic of commands and their execution is based on Apache commons-chain. But you don't need to worry about that at all. The only things you need to know are: Create your command by extending MgnlCommand or one of its subclasses. Command instances are pooled and reused so you can do heavy initialization in constructor and be sure that it will be called just once per instance of command. Any single instance of command is guarantied to be called by one thread only at any given time. Since the commands are pooled and reused, it is important for custom commands to release all unnecessary resources in the release() method to prevent allocation of unnecessary memory, but more importantly to make sure status possibly held by the command instanc...

Date: February, 22 2010
Url: http://www.java.net/blog/rah003/archive/2010/02/21/tweet-magnolia-tweet

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