| package org.onlab.onos.net.provider; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Base implementation of provider broker. |
| * |
| * @param <P> type of the information provider |
| * @param <S> type of the provider service |
| */ |
| public abstract class AbstractProviderBroker<P extends Provider, S extends ProviderService<P>> |
| implements ProviderBroker<P, S> { |
| |
| private final Map<ProviderId, S> services = new HashMap<>(); |
| |
| /** |
| * Creates a new provider service bound to the specified provider. |
| * |
| * @param provider provider |
| * @return provider service |
| */ |
| protected abstract S createProviderService(P provider); |
| |
| @Override |
| public synchronized S register(P provider) { |
| checkNotNull(provider, "Provider cannot be null"); |
| checkArgument(!services.containsKey(provider), "Provider %s already registered", provider.id()); |
| S service = createProviderService(provider); |
| services.put(provider.id(), service); |
| return service; |
| } |
| |
| @Override |
| public synchronized void unregister(P provider) { |
| checkNotNull(provider, "Provider cannot be null"); |
| S service = services.get(provider); |
| if (service != null && service instanceof AbstractProviderService) { |
| ((AbstractProviderService) service).invalidate(); |
| services.remove(provider); |
| } |
| } |
| } |