Custom Class Loader
This is the manual for older MicroStream versions (Version < 5.0).
The new documentation (Version >= 5.0) is located at:
In certain environments or setups it is necessary to provide specific ClassLoader instances. This can be done by customizing the connection foundation.
If a single ClassLoader is sufficient, just create a new provider by handing over the instance:
EmbeddedStorageManager storage = EmbeddedStorage.Foundation(Paths.get("mydb"))
.onConnectionFoundation(cf ->
cf.setClassLoaderProvider(ClassLoaderProvider.New(myClassLoader))
)
.start();
Or return a ClassLoader depending on the requested type:
EmbeddedStorageManager storage = EmbeddedStorage.Foundation(Paths.get("mydb"))
.onConnectionFoundation(cf ->
cf.setClassLoaderProvider(typeName -> {
if(typeName.startsWith("com.company.module1."))
{
return module1ClassLoader;
}
if(typeName.startsWith("com.company.module2."))
{
return module2ClassLoader;
}
return ClassLoader.getSystemClassLoader();
})
)
.start();

Class Loader in Application Server

Most application servers load the session's classes with the context class loader. Just use the one of the current thread:
EmbeddedStorageManager storage = EmbeddedStorage.Foundation(Paths.get("mydb"))
.onConnectionFoundation(cf ->
cf.setClassLoaderProvider(ClassLoaderProvider.New(
Thread.currentThread().getContextClassLoader()
))
)
.start();
Export as PDF
Copy link