tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 1 | package org.onlab.onos.net.provider; |
| 2 | |
| 3 | import java.util.HashMap; |
| 4 | import java.util.Map; |
| 5 | |
| 6 | import static com.google.common.base.Preconditions.checkArgument; |
| 7 | import static com.google.common.base.Preconditions.checkNotNull; |
| 8 | |
| 9 | /** |
| 10 | * Base implementation of provider broker. |
| 11 | * |
| 12 | * @param <P> type of the information provider |
| 13 | * @param <S> type of the provider service |
| 14 | */ |
tom | d735672 | 2014-08-26 01:07:39 -0700 | [diff] [blame] | 15 | public abstract class AbstractProviderBroker<P extends Provider, S extends ProviderService<P>> |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 16 | implements ProviderBroker<P, S> { |
| 17 | |
| 18 | private final Map<ProviderId, S> services = new HashMap<>(); |
| 19 | |
| 20 | /** |
| 21 | * Creates a new provider service bound to the specified provider. |
| 22 | * |
| 23 | * @param provider provider |
| 24 | * @return provider service |
| 25 | */ |
| 26 | protected abstract S createProviderService(P provider); |
| 27 | |
| 28 | @Override |
| 29 | public synchronized S register(P provider) { |
| 30 | checkNotNull(provider, "Provider cannot be null"); |
| 31 | checkArgument(!services.containsKey(provider), "Provider %s already registered", provider.id()); |
| 32 | S service = createProviderService(provider); |
| 33 | services.put(provider.id(), service); |
| 34 | return service; |
| 35 | } |
| 36 | |
| 37 | @Override |
| 38 | public synchronized void unregister(P provider) { |
| 39 | checkNotNull(provider, "Provider cannot be null"); |
| 40 | S service = services.get(provider); |
| 41 | checkArgument(service != null, "Provider %s not registered", provider.id()); |
| 42 | if (service instanceof AbstractProviderService) { |
| 43 | ((AbstractProviderService) service).invalidate(); |
| 44 | } |
| 45 | services.remove(provider); |
| 46 | } |
| 47 | } |