Hi,
I have an application that dynamically loads jar files and reloads them
when they are changed. Unfortunately I'm have an issue getting Cayenne
to see the classes inside one of these dynamically loaded jar files. I
have some test code that looks roughly like this.
import com.dbclientbase.Database.Account;
public class blah
public testMethod(){
Account ac = new Account(); // This object instantiates
without an error so it's visible to app outside of Cayenne
ObjectContext oc = DBClientBase.getObjectContext(); // This
method generates the ServerRuntime and fails to get an ObjectContext to
work with (error below)
}
}
The error output below seems to suggest that Cayenne cannot access the
Account class although I can successfully instantiate a non-Cayenne
object. What can I do to ensure that Cayenne also has access to the
contents of a dynamically loaded and reloaded jar file? I have found
references to AdhocObjectFactory.getClassLoader() but I can't find any
examples on how to use it and I'm quite at a loss on how to even begin
use it.
Thanks,
Andrew
Exception==>org.apache.cayenne.configuration.server.DataDomainLoadException:
[v.4.1.B2 May 04 2019 09:30:14] DataDomain startup failed: Invalid
class: com.dbclientbase.Database$Account
at
org.apache.cayenne.configuration.server.DataDomainProvider.get(DataDomainProvider.java:123)
at
org.apache.cayenne.configuration.server.DataDomainProvider.get(DataDomainProvider.java:60)
at
org.apache.cayenne.di.spi.CustomProvidersProvider.get(CustomProvidersProvider.java:39)
at
org.apache.cayenne.di.spi.FieldInjectingProvider.get(FieldInjectingProvider.java:43)
at
org.apache.cayenne.di.spi.DefaultScopeProvider.get(DefaultScopeProvider.java:50)
at
org.apache.cayenne.di.spi.DefaultInjector.getInstance(DefaultInjector.java:139)
at
org.apache.cayenne.di.spi.FieldInjectingProvider.value(FieldInjectingProvider.java:103)
at
org.apache.cayenne.di.spi.FieldInjectingProvider.injectMember(FieldInjectingProvider.java:68)
at
org.apache.cayenne.di.spi.FieldInjectingProvider.injectMembers(FieldInjectingProvider.java:59)
at
org.apache.cayenne.di.spi.FieldInjectingProvider.get(FieldInjectingProvider.java:44)
at
org.apache.cayenne.di.spi.DefaultScopeProvider.get(DefaultScopeProvider.java:50)
at
org.apache.cayenne.di.spi.DefaultInjector.getInstance(DefaultInjector.java:134)
at
org.apache.cayenne.configuration.CayenneRuntime.newContext(CayenneRuntime.java:124)
at
com.dbclientbase.DBClientBase.getObjectContext(DBClientBase.java:100)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.apache.cayenne.di.DIRuntimeException: Invalid class:
com.Database$Account
at
org.apache.cayenne.di.spi.DefaultAdhocObjectFactory.getJavaClass(DefaultAdhocObjectFactory.java:128)
at org.apache.cayenne.util.Util.getJavaClass(Util.java:632)
at org.apache.cayenne.map.ObjEntity.getJavaClass(ObjEntity.java:265)
at
org.apache.cayenne.map.EntityResolver.initCallbacks(EntityResolver.java:141)
at
org.apache.cayenne.map.EntityResolver.getCallbackRegistry(EntityResolver.java:163)
at
org.apache.cayenne.access.DataDomain.addListener(DataDomain.java:791)
at
org.apache.cayenne.access.DataDomain.addSyncFilter(DataDomain.java:748)
at
org.apache.cayenne.configuration.server.DataDomainProvider.createAndInitDataDomain(DataDomainProvider.java:188)
at
org.apache.cayenne.configuration.server.DataDomainProvider.get(DataDomainProvider.java:117)
... 16 more
Caused by: java.lang.ClassNotFoundException:
com.dbclientbase.Database.Account
at
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
at
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:398)
at
org.apache.cayenne.di.spi.DefaultAdhocObjectFactory.getJavaClass(DefaultAdhocObjectFactory.java:93)
... 24 more
