tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 1 | package org.onlab.onos.net.provider; |
| 2 | |
tom | 132b58a | 2014-08-28 16:11:28 -0700 | [diff] [blame] | 3 | import com.google.common.collect.ImmutableSet; |
| 4 | |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 5 | import java.util.HashMap; |
| 6 | import java.util.Map; |
tom | 132b58a | 2014-08-28 16:11:28 -0700 | [diff] [blame] | 7 | import java.util.Set; |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 8 | |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 9 | import static com.google.common.base.Preconditions.checkNotNull; |
tom | 132b58a | 2014-08-28 16:11:28 -0700 | [diff] [blame] | 10 | import static com.google.common.base.Preconditions.checkState; |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 11 | |
| 12 | /** |
tom | 96dfcab | 2014-08-28 09:26:03 -0700 | [diff] [blame] | 13 | * Base implementation of provider registry. |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 14 | * |
| 15 | * @param <P> type of the information provider |
| 16 | * @param <S> type of the provider service |
| 17 | */ |
tom | 96dfcab | 2014-08-28 09:26:03 -0700 | [diff] [blame] | 18 | public abstract class AbstractProviderRegistry<P extends Provider, S extends ProviderService<P>> |
| 19 | implements ProviderRegistry<P, S> { |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 20 | |
tom | e5ec3fd | 2014-09-04 15:18:06 -0700 | [diff] [blame] | 21 | private final Map<ProviderId, P> providers = new HashMap<>(); |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 22 | private final Map<ProviderId, S> services = new HashMap<>(); |
| 23 | |
| 24 | /** |
| 25 | * Creates a new provider service bound to the specified provider. |
| 26 | * |
| 27 | * @param provider provider |
| 28 | * @return provider service |
| 29 | */ |
| 30 | protected abstract S createProviderService(P provider); |
| 31 | |
| 32 | @Override |
| 33 | public synchronized S register(P provider) { |
| 34 | checkNotNull(provider, "Provider cannot be null"); |
tom | 132b58a | 2014-08-28 16:11:28 -0700 | [diff] [blame] | 35 | checkState(!services.containsKey(provider.id()), "Provider %s already registered", provider.id()); |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 36 | S service = createProviderService(provider); |
| 37 | services.put(provider.id(), service); |
tom | e5ec3fd | 2014-09-04 15:18:06 -0700 | [diff] [blame] | 38 | providers.put(provider.id(), provider); |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 39 | return service; |
| 40 | } |
| 41 | |
| 42 | @Override |
| 43 | public synchronized void unregister(P provider) { |
| 44 | checkNotNull(provider, "Provider cannot be null"); |
tom | 132b58a | 2014-08-28 16:11:28 -0700 | [diff] [blame] | 45 | S service = services.get(provider.id()); |
tom | b1260e4 | 2014-08-26 18:39:57 -0700 | [diff] [blame] | 46 | if (service != null && service instanceof AbstractProviderService) { |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 47 | ((AbstractProviderService) service).invalidate(); |
tom | 132b58a | 2014-08-28 16:11:28 -0700 | [diff] [blame] | 48 | services.remove(provider.id()); |
tom | e5ec3fd | 2014-09-04 15:18:06 -0700 | [diff] [blame] | 49 | providers.remove(provider.id()); |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 50 | } |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 51 | } |
tom | 132b58a | 2014-08-28 16:11:28 -0700 | [diff] [blame] | 52 | |
| 53 | @Override |
| 54 | public synchronized Set<ProviderId> getProviders() { |
| 55 | return ImmutableSet.copyOf(services.keySet()); |
| 56 | } |
| 57 | |
tom | e5ec3fd | 2014-09-04 15:18:06 -0700 | [diff] [blame] | 58 | /** |
| 59 | * Returns the provider registered with the specified provider ID. |
| 60 | * |
| 61 | * @param providerId provider identifier |
| 62 | * @return provider |
| 63 | */ |
| 64 | protected synchronized P getProvider(ProviderId providerId) { |
| 65 | return providers.get(providerId); |
| 66 | } |
| 67 | |
tom | 64b7aac | 2014-08-26 00:18:21 -0700 | [diff] [blame] | 68 | } |