Hi Richard,
To avoid copy/pasting, you can probably start 2 Cayenne stacks. If you are on
Cayenne 3.0, this will be 2 Configuration objects and you can add a correct
DataNode via API to each stack.
In 3.1 it is a bit more elegant. In 3.1M2 2 stacks will correspond to 2
ServerRuntime's. In one of them you can override the Db connection settings via
a custom configuration module like this:
class MyModule implements Module {
public void configure(Binder binder) {
binder.bindMap(DefaultRuntimeProperties.PROPERTIES_MAP).put("cayenne.jdbc.url",
"alturl").put(...);
// see PropertyDataSourceFactory for details on property names, etc.
}
}
Finally in yet unreleased 3.1M3 it will be even easier (this code exists on
trunk already). Cayenne can merge multiple mappings in runtime, so you may
create 2 projects in the Modeler:
1. A common DataMap + one of DataNodes, say cayenne-map.xml
2. A project with only a DataNode using the same name as DataNode from project
1, say cayenne-map-db2.xml
and then load 2 stacks as this:
ServerRuntime r1 = new ServerRuntime("cayenne-map.xml");
ServerRuntime r2 = new ServerRuntime(new String[] { "cayenne-map.xml",
"cayenne-map-db2.xml"});
Andrus
On Aug 30, 2011, at 4:45 PM, Richard Frovarp wrote:
> I'm working on something now where I'm using two separate DBs. I'm actually
> trying to compare data between the two systems. So my maps should be
> identical, just two different nodes.
>
> Is there an easy way to do this? Right now it seems that I do a copy and
> paste, then change the prefix or other such identifier between the two. Am I
> missing something where this is easy to setup?
>
> Thanks,
> Richard
>
