Off the cuff, you could probably do this with PrivateModules:
public class DatabaseOneModule extends PrivateModule {
@Override protected void configure() {
Names.bindProperties(binder(), loadProperties("*database_one.properties
*" ));
Key<DataSource> dataSourceKey = Key.get(Datasource.class, DbOne.class);
bind(dataSourceKey)
.toProvider(MySQLDataSourceProvider.class)
.in(Singleton.class); // prefer Singleton.class over
Scopes.SINGLETON
expose(dataSourceKey);
}
}
...and you'd have something almost identical for DatabaseTwoModule (in fact,
you could probably parameterize a generic module to accept the file name and
the annotation you want, but that's not the most salient point here).
Then you install DatabaseOneModule and DatabaseTwoModule and I suspect you
will get what you're looking for.
-Fred
On Sat, Jan 29, 2011 at 12:57 PM, Evan Ruff <[email protected]> wrote:
> Guy guys,
>
> Guice newbie here. I'm trying to migrate my DAO Factory Pattern to a Guice
> provider framework. The issue I'm having is figuring out how to create data
> sources that point to various databases, all in the same module. For a
> single database, I'm golden, everything is working great; however, I'm not
> sure how to proceed.
>
> I've got my ProductionDatabaseModule (AbstractModule) that does that does:
>
> protected void configure() {
> Names.bindProperties(binder(), loadProperties("*
> database_one.properties*" ));
> bind(DataSource.class).annotatedWith( *@DBOne *
> ).toProvider(MySQLDataSourceProvider.class).in(Scopes.SINGLETON);
> }
>
> What I'd like to do, is follow it up with something like this:
>
> Names.bindProperties(binder(), loadProperties("*database_two.properties*"
> ));
> bind(DataSource.class).annotatedWith( *@DBTwo *
> ).toProvider(MySQLDataSourceProvider.class).in(Scopes.SINGLETON);
>
> But I don't understand how to make my second binding hook up to the second
> properties file without overwriting the first. Any recommendation on how to
> handle this?
>
> Thanks for helping out the new guy!
>
> E
>
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