It has been quite the frustrating day. My code has been working perfectly fine and then the following...
I make heavy use of the Component xml files. I wired together my services using the component referenced services and cardinality. All was working well until something seemed to flip a switch and decide that my Implementation of an interface did not meet the correct method signature anymore. I cannot, for the life of me, see how this is possible considering the methods match exactly.
Here is the offending Component XML:
<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0" name="Metric Manager">
<implementation class="com.ngc.mc.metrics.MetricManagerImpl"/>
<reference bind="setSensorManager" cardinality="1..1" interface="com.ngc.mc.sensor.ISensorManager" name="ISensorManager" policy="dynamic" unbind="unsetSensorManager"/>
<reference bind="setSensorInformationProvider" cardinality="1..1" interface="com.ngc.mc.sensor.ISensorInformationProvider" name="ISensorInformationProvider" policy="dynamic" unbind="unsetSensorInformationProvider"/>
<service>
<provide interface="com.ngc.mc.metric.IMetricManager"/>
</service>
</scr:component>
And here is the interface the component is attempting to adhere to:
public interface IMetricManager {
public Request score(Request r);
public void setSensorManager(ISensorManager sm);
public void setSensorInformationProvider(ISensorInformationProvider sip);
}
And here is the implementation of the above interface, with a few lines of proprietary code removed:
public class MetricManagerImpl implements IMetricManager {
ISensorManager sensorManager = null;
ISensorInformationProvider sensorInfoProvider = null;
@Override
public Request score(Request r) {
// code....
}
private int rawScore(Request r) {
// Get location
CompoundCoordinates<Altitude, LatLong> location = sensorManager
.getSensorLocation();
// TODO: finish scoring alg per use case 3.2
return (int) Math.round((Math.random() * 100));
}
@Override
public void setSensorManager(ISensorManager sm) {
sensorManager = sm;
}
public void unsetSensorManager(ISensorManager sm) {
if (sensorManager == sm) {
sensorManager = null;
}
}
@Override
public void setSensorInformationProvider(ISensorInformationProvider sip) {
sensorInfoProvider = sip;
}
public void unsetSensorInformationProvider(ISensorInformationProvider sip) {
if (sensorInfoProvider == sip) {
sensorInfoProvider = null;
}
}
}
The ERROR occurs on startup when OSGI attempts to create an instance of the MetricManagerImpl:
java.lang.VerifyError: (class: com/ngc/mc/metrics/MetricManagerImpl, method: score signature: (Lcom/ngc/mc/datamodel/Request;)Lcom/ngc/mc/datamodel/Request;) Incompatible argument to function
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at org.eclipse.equinox.internal.ds.model.ServiceComponent.createInstance(ServiceComponent.java:457)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.createInstance(ServiceComponentProp.java:254)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:315)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:580)
at org.eclipse.equinox.internal.ds.ServiceReg.getService(ServiceReg.java:53)
at org.eclipse.osgi.internal.serviceregistry.ServiceUse$1.run(ServiceUse.java:120)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.internal.serviceregistry.ServiceUse.getService(ServiceUse.java:118)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:447)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.getService(ServiceRegistry.java:430)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.getService(BundleContextImpl.java:667)
at org.osgi.util.tracker.ServiceTracker.addingService(ServiceTracker.java:442)
at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:896)
at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:233)
at org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:840)
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:104)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:933)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:756)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:711)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:206)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:507)
at org.eclipse.equinox.internal.ds.InstanceProcess.registerService(InstanceProcess.java:496)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:259)
at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:323)
at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:221)
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:104)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:933)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:756)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:711)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:206)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:507)
at org.eclipse.equinox.internal.ds.InstanceProcess.registerService(InstanceProcess.java:496)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:259)
at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:323)
at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:221)
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:104)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:933)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:227)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:756)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:711)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:206)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:507)
at org.eclipse.equinox.internal.ds.InstanceProcess.registerService(InstanceProcess.java:496)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:259)
at org.eclipse.equinox.internal.ds.Resolver.buildNewlySatisfied(Resolver.java:431)
at org.eclipse.equinox.internal.ds.Resolver.enableComponents(Resolver.java:213)
at org.eclipse.equinox.internal.ds.SCRManager.performWork(SCRManager.java:800)
at org.eclipse.equinox.internal.ds.SCRManager$QueuedJob.dispatch(SCRManager.java:767)
at org.eclipse.equinox.internal.ds.WorkThread.run(WorkThread.java:89)
at org.eclipse.equinox.internal.util.impl.tpt.threadpool.Executor.run(Executor.java:70)
Any help would be greatly appreciated since I am holding up a team of people with this suddenly appearing error. I had not changed the method signature at all when this started happening. In addition, I cleaned, manually deleted class files, removed all run configurations, etc... so that the Equinox headless bundles would run fresh. Still I receive this problem.
Thanks,
Brad
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