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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.net.provider;
import java.util.Set;
/**
* Registry for tracking information providers with the core.
*
* @param <P> type of the information provider
* @param <S> type of the provider service
*/
public interface ProviderRegistry<P extends Provider, S extends ProviderService<P>> {
/**
* Registers the supplied provider with the core.
*
* @param provider provider to be registered
* @return provider service for injecting information into core
* @throws java.lang.IllegalArgumentException if the provider is registered already
*/
S register(P provider);
/**
* Unregisters the supplied provider. As a result the previously issued
* provider service will be invalidated and any subsequent invocations
* of its methods may throw {@link java.lang.IllegalStateException}.
* <p>
* Unregistering a provider that has not been previously registered results
* in a no-op.
* </p>
*
* @param provider provider to be unregistered
*/
void unregister(P provider);
/**
* Returns a set of currently registered provider identities.
*
* @return set of provider identifiers
*/
Set<ProviderId> getProviders();
}
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