How to use

getServiceEntry

method

in

com.b2international.snowowl.core.ApplicationContext

public <T> T getService(final Class<T> serviceInterface) {
  return getServiceEntry(serviceInterface).implementation;
}

public <T> void removeServiceListener(final Class<T> serviceInterface, final IServiceChangeListener<T> listener) {
  final ServiceRegistryEntry<T> entry = getServiceEntry(serviceInterface);
  entry.listeners.remove(listener);
}

public <T> void addServiceListener(final Class<T> serviceInterface, final IServiceChangeListener<T> listener) {
  final ServiceRegistryEntry<T> entry = getServiceEntry(serviceInterface);
  if (null != entry.implementation) {
    listener.serviceChanged(null, entry.implementation);
  }
  entry.listeners.add(listener);
}

public <T> void registerService(final Class<T> serviceInterface, final T implementation) {
  
  Preconditions.checkNotNull(implementation, "Registering service for " + serviceInterface.getSimpleName() + " is prohibited with unspecified implementation.");
  
  final ServiceRegistryEntry<T> entry = getServiceEntry(serviceInterface);
  final T oldImplementation = entry.implementation;
  entry.implementation = implementation;
  // notify listeners
  for (final Iterator<IServiceChangeListener<T>> ir = new CopyOnWriteArrayList<IServiceChangeListener<T>>(entry.listeners).iterator(); ir.hasNext(); /**/) {
    final IServiceChangeListener<T> listener = ir.next();
    listener.serviceChanged(oldImplementation, implementation);
  }
  
  // dispose old registered implementation
  if (oldImplementation instanceof IDisposableService && !((IDisposableService) oldImplementation).isDisposed()) {
    ((IDisposableService)oldImplementation).dispose();
  }
  
  LOGGER.debug(MessageFormat.format("Registered service {0} for interface {1}.", implementation.getClass().getName(), serviceInterface.getName()));
}