how to configure a FileEntityStoreService - apache-zest

Question

I'm trying to use a File EntityStore and I'm having an exception at activation because of slices being zero.
I assume it's an issue with configuration but I expected the default value to be 1.
I narrowed down to this assembly:
import org.apache.polygene.api.common.Visibility;
import org.apache.polygene.api.structure.Application;
import org.apache.polygene.bootstrap.Energy4Java;
import org.apache.polygene.entitystore.file.assembly.FileEntityStoreAssembler;
import org.apache.polygene.index.rdf.assembly.RdfNativeSesameStoreAssembler;
import org.apache.polygene.library.fileconfig.FileConfigurationAssembler;
public class FileStoreException {
public static void main(String[] args) throws Exception {
Energy4Java polygene = new Energy4Java();
Application application = polygene.newApplication(factory -> factory.newApplicationAssembly(
module -> {
new FileConfigurationAssembler()
.visibleIn(Visibility.application)
.assemble(module);
new FileEntityStoreAssembler()
.withConfig(module, Visibility.application)
.assemble(module);
new RdfNativeSesameStoreAssembler()
.withConfig(module, Visibility.application)
.assemble(module);
module.defaultServices();
})
);
application.activate();
}
}
The end of the stacktrace:
Caused by: java.lang.ArithmeticException: / by zero
at method "get" of FileEntityStoreService:FileEntityStoreService in module [Module 1] of layer [Layer 1].(:0)
at org.apache.polygene.entitystore.file.FileEntityStoreMixin.getDataFile(FileEntityStoreMixin.java:277)
at org.apache.polygene.entitystore.file.FileEntityStoreMixin.getDataFile(FileEntityStoreMixin.java:328)
at org.apache.polygene.entitystore.file.FileEntityStoreMixin.get(FileEntityStoreMixin.java:138)
at org.apache.polygene.spi.entitystore.helpers.JSONMapEntityStoreMixin.entityStateOf(JSONMapEntityStoreMixin.java:193)
... 14 more
I'm using version 3.0.0 and I'm on linux.

Answer 1

Adding FileConfigurationAssembler gave me the false impression that my config was done.
I struggled to find a working example of an assembly using a FileEntityStoreAssembler so here's one:
Application application = polygene.newApplication(factory -> factory.newApplicationAssembly(
module -> {
ModuleAssembly config = module.layer().module("Config");
config.defaultServices();
new MemoryEntityStoreAssembler().assemble(config);
config.entities(FileEntityStoreConfiguration.class);
new FileEntityStoreAssembler()
.withConfig(config, Visibility.application)
.assemble(module);
new RdfNativeSesameStoreAssembler()
.withConfig(config, Visibility.application)
.assemble(module);
module.defaultServices();
})
);
And to configure it:
config.forMixin(FileEntityStoreConfiguration.class)
.declareDefaults()
.directory().set("/home/user/appdata/");