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/*
* Copyright 2015 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.incubator.rpc.impl;
import static com.google.common.base.Preconditions.checkArgument;
import java.net.URI;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.onlab.osgi.DefaultServiceDirectory;
import org.onlab.osgi.ServiceDirectory;
import org.onosproject.incubator.rpc.RemoteServiceContext;
import org.onosproject.incubator.rpc.RemoteServiceContextProvider;
import org.onosproject.incubator.rpc.RemoteServiceContextProviderService;
import org.onosproject.incubator.rpc.RemoteServiceProviderRegistry;
import org.onosproject.net.provider.ProviderId;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.annotations.Beta;
/**
* Sample implementation of RemoteServiceContextProvider.
*
* Scheme: "local", calling corresponding local service on request.
* Only expected for testing until real RPC implementation is ready.
*
* Note: This is expected to be removed or separated out as separate bundle
* once other RPC implementaion became available.
*/
@Beta
@Component(immediate = true)
public class LocalRemoteServiceProvider implements RemoteServiceContextProvider {
private final Logger log = LoggerFactory.getLogger(getClass());
private RemoteServiceContext theOne = new LocalServiceContext();
private static final ProviderId PID = new ProviderId("local", "org.onosproject.rpc.provider.local");
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected RemoteServiceProviderRegistry rpcRegistry;
private final Map<Class<? extends Object>, Object> services = new ConcurrentHashMap<>();
private RemoteServiceContextProviderService providerService;
@Activate
protected void activate() {
services.put(SomeOtherService.class, new SomeOtherServiceImpl());
providerService = rpcRegistry.register(this);
log.info("Started");
}
@Deactivate
protected void deactivate() {
rpcRegistry.unregister(this);
log.info("Stopped");
}
@Override
public ProviderId id() {
return PID;
}
@Override
public RemoteServiceContext get(URI uri) {
checkArgument(Objects.equals(uri.getScheme(), "local"));
return theOne;
}
private final class LocalServiceContext implements RemoteServiceContext {
private final ServiceDirectory directory = new DefaultServiceDirectory();
@Override
public <T> T get(Class<T> serviceClass) {
@SuppressWarnings("unchecked")
T service = (T) services.get(serviceClass);
if (service != null) {
return service;
}
// look up OSGi services on this host.
// provided to unblock development depending on RPC.
return directory.get(serviceClass);
}
}
// Service provided by RPC can be non-OSGi Service
public static interface SomeOtherService {
String hello();
}
public static class SomeOtherServiceImpl implements SomeOtherService {
@Override
public String hello() {
return "Goodbye";
}
}
}
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