Matchers/mailets as Components/Composables?

[Oki DZ <ok...@pindad.com>]

Hi,

I'd like to record the senders and recipients of the messages in a db
table. I think I'm having headaches in getting a JdbcDataSource from a
mailet. So I have to come up with the following. I know, it has problems;
getting the configuration from the config.xml file by defining the path,
for example.

public void init() {
	Configuration config;
	Configuration[] dataStoreConfig;
	Configuration[] compConfs;
	
	try {
	    configBuilder = new DefaultConfigurationBuilder();
	    config =
configBuilder.buildFromFile("./dist/apps/james/conf/config.xml"); //Fixme: 
	    dataStoreConfig = config.getChildren("data-store");
	    compConfs = dataStoreConfig[0].getChildren();

	    componentSelector = new ExcaliburComponentSelector();

componentSelector.setLogger(Hierarchy.getDefaultHierarchy().getLoggerFor("data-store")); 
// Fixme:
	    componentSelector.configure(compConfs[0]);
	    componentSelector.initialize();

	    dataSource = (JdbcDataSource)
componentSelector.select("mailetsource");
	    storeSQL = "insert into SenderRecipients (sender, recipients,
size) " +
		"values (?, ?, ?)";
	    conn = (JdbcConnection) dataSource.getConnection();
	    ps = conn.prepareStatement(storeSQL);
	} catch(Exeption e) {
	  //...
	}	   
}

I think it would be nicer if the matchers and mailets in James become
Avalon Components, so that the compose(), configure(), and initialize()
would be executed by Avalon. I don't know anything better than the code
above. 

Maybe there's a way to get a reference to a Block or Component from
classes which are not Avalon components. As I understand it, Avalon
components are usable if they are initialized from Avalon blocks (so that 
they can have a reference to the (system's) ExcaliburComponentManager. Or
I could be just plain wrong...

BTW, building Avalon components by feeding the Configuration into the
ComponentSelector is really neat, I believe.

Oki



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