Major Description
For certain complex interfaces, HiveMind gets runtime errors generating a class:
PM [DEBUG] Creating SingletonProxy for service kd.PM
org.apache.hivemind.ApplicationRuntimeException: Unable to add method void close() throws javax.resource.ResourceExcepti
on to class $SingletonProxy_1001ed04167_14: duplicate method: close
at org.apache.hivemind.impl.servicemodel.SingletonServiceModel.createSingletonProxy(SingletonServiceModel.java:114)
at org.apache.hivemind.impl.servicemodel.SingletonServiceModel.getService(SingletonServiceModel.java:58)
at org.apache.hivemind.impl.ServicePointImpl.getService(ServicePointImpl.java:171)
at org.apache.hivemind.impl.ServicePointImpl.getService(ServicePointImpl.java:184)
at org.apache.hivemind.impl.RegistryInfrastructureImpl.getService(RegistryInfrastructureImpl.java:162)
at org.apache.hivemind.impl.RegistryImpl.getService(RegistryImpl.java:66)
at kd.Main.main(Main.java:25)
Caused by: org.apache.hivemind.ApplicationRuntimeException: Unable to add method void close() throws javax.resource.Reso
urceException to class $SingletonProxy_1001ed04167_14: duplicate method: close
at org.apache.hivemind.service.impl.ClassFabImpl.addMethod(ClassFabImpl.java:310)
at org.apache.hivemind.impl.ProxyBuilder.addServiceMethods(ProxyBuilder.java:93)
at org.apache.hivemind.impl.servicemodel.SingletonServiceModel.createSingletonProxyClass(SingletonServiceModel.java:169
)
at org.apache.hivemind.impl.servicemodel.SingletonServiceModel.createSingletonProxy(SingletonServiceModel.java:89)
... 6 more
Caused by: javassist.CannotCompileException: duplicate method: close
at javassist.bytecode.ClassFile.testExistingMethod(ClassFile.java:456)
at javassist.bytecode.ClassFile.addMethod(ClassFile.java:440)
at javassist.CtClassType.addMethod(CtClassType.java:848)
at org.apache.hivemind.service.impl.ClassFabImpl.addMethod(ClassFabImpl.java:306)
... 9 more
Exception in thread "main"
Investigation found that the interface in question, kodo.runtime.KodoPersistenceManager extended a number of other interfaces,
and has conflicting definitions for method close():
void close() throws Exception ... from com.solarmetric.util.Closeable
void close() throws javax.resource.ResourceException ... from javax.resource.cci.Connection
void close() ... from javax.jdo.PersistenceManager
HiveMind was attempting to implement all of these, causing problems (same return type, same name, same parameters means there can be only one such method).
HiveMind needs to more carefully analyze these method signatures and implement the most general case; in this case "void close() throws Exception". This logic is centralized in the MethodIterator and MethodSignature classes.