Registry integration fails indiscriminately with `Unable to link the element with id 'abc' with the Registry`

[arnoweiss]

Feature Request

There's a bunch of scenarios where a call failing to the registry integration is hard to debug. This includes instances where there's a pre-existing shell descriptor for an AAS [1] or the server returns a non-2xx response [2].

Affected code

[1]

basyx-java-server-sdk/basyx.aasrepository/basyx.aasrepository-feature-registry-integration/src/main/java/org/eclipse/digitaltwin/basyx/aasrepository/feature/registry/integration/RegistryIntegrationAasRepository.java

Lines 169 to 177 in f20e94d

	private boolean shellExistsOnRegistry(String shellId, RegistryAndDiscoveryInterfaceApi registryApi) {
	try {
	registryApi.getAssetAdministrationShellDescriptorById(shellId);
	return true;
	} catch (ApiException e) {
	return false;
	}
	}

[2]

basyx-java-server-sdk/basyx.aasrepository/basyx.aasrepository-feature-registry-integration/src/main/java/org/eclipse/digitaltwin/basyx/aasrepository/feature/registry/integration/RegistryIntegrationAasRepository.java

Lines 139 to 149 in f20e94d

	private void registerAas(AssetAdministrationShellDescriptor descriptor) {
	RegistryAndDiscoveryInterfaceApi registryApi = aasRepositoryRegistryLink.getRegistryApi();
	try {
	registryApi.postAssetAdministrationShellDescriptor(descriptor);
	logger.info("Shell '{}' has been automatically linked with the Registry", descriptor.getId());
	} catch (ApiException e) {
	throw new RepositoryRegistryLinkException(descriptor.getId(), e);
	}
	}