/**
* Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.openflowplugin.impl.rpc;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Function;
import com.google.common.collect.Iterators;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.Iterator;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Semaphore;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.opendaylight.controller.md.sal.binding.api.NotificationPublishService;
import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.RoutedRpcRegistration;
import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
import org.opendaylight.openflowplugin.api.openflow.device.DeviceInfo;
import org.opendaylight.openflowplugin.api.openflow.device.RequestContext;
import org.opendaylight.openflowplugin.api.openflow.lifecycle.MastershipChangeListener;
import org.opendaylight.openflowplugin.api.openflow.rpc.RpcContext;
import org.opendaylight.openflowplugin.api.openflow.statistics.ofpspecific.MessageSpy;
import org.opendaylight.openflowplugin.extension.api.core.extension.ExtensionConverterProvider;
import org.opendaylight.openflowplugin.impl.util.MdSalRegistrationUtils;
import org.opendaylight.openflowplugin.openflow.md.core.sal.convertor.ConvertorExecutor;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeContext;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
import org.opendaylight.yangtools.yang.binding.RpcService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class RpcContextImpl implements RpcContext {
private static final Logger LOG = LoggerFactory.getLogger(RpcContextImpl.class);
private final RpcProviderRegistry rpcProviderRegistry;
private final MessageSpy messageSpy;
private final Semaphore tracker;
private boolean isStatisticsRpcEnabled;
// TODO: add private Sal salBroker
private final ConcurrentMap<Class<?>, RoutedRpcRegistration<?>> rpcRegistrations = new ConcurrentHashMap<>();
private final KeyedInstanceIdentifier<Node, NodeKey> nodeInstanceIdentifier;
private volatile CONTEXT_STATE state = CONTEXT_STATE.INITIALIZATION;
private final DeviceInfo deviceInfo;
private final DeviceContext deviceContext;
private final ExtensionConverterProvider extensionConverterProvider;
private final ConvertorExecutor convertorExecutor;
private final NotificationPublishService notificationPublishService;
RpcContextImpl(@Nonnull final RpcProviderRegistry rpcProviderRegistry,
final int maxRequests,
@Nonnull final DeviceContext deviceContext,
@Nonnull final ExtensionConverterProvider extensionConverterProvider,
@Nonnull final ConvertorExecutor convertorExecutor,
@Nonnull final NotificationPublishService notificationPublishService,
boolean statisticsRpcEnabled) {
this.deviceContext = deviceContext;
this.deviceInfo = deviceContext.getDeviceInfo();
this.nodeInstanceIdentifier = deviceContext.getDeviceInfo().getNodeInstanceIdentifier();
this.messageSpy = deviceContext.getMessageSpy();
this.rpcProviderRegistry = rpcProviderRegistry;
this.extensionConverterProvider = extensionConverterProvider;
this.notificationPublishService = notificationPublishService;
this.convertorExecutor = convertorExecutor;
this.isStatisticsRpcEnabled = statisticsRpcEnabled;
this.tracker = new Semaphore(maxRequests, true);
}
/**
* @see org.opendaylight.openflowplugin.api.openflow.rpc.RpcContext#registerRpcServiceImplementation(java.lang.Class,
* org.opendaylight.yangtools.yang.binding.RpcService)
*/
@Override
public <S extends RpcService> void registerRpcServiceImplementation(final Class<S> serviceClass,
final S serviceInstance) {
if (! rpcRegistrations.containsKey(serviceClass)) {
final RoutedRpcRegistration<S> routedRpcReg = rpcProviderRegistry.addRoutedRpcImplementation(serviceClass, serviceInstance);
routedRpcReg.registerPath(NodeContext.class, nodeInstanceIdentifier);
rpcRegistrations.put(serviceClass, routedRpcReg);
if (LOG.isDebugEnabled()) {
LOG.debug("Registration of service {} for device {}.",
serviceClass.getSimpleName(),
nodeInstanceIdentifier.getKey().getId().getValue());
}
}
}
@Override
public <S extends RpcService> S lookupRpcService(final Class<S> serviceClass) {
RoutedRpcRegistration<?> registration = rpcRegistrations.get(serviceClass);
final RpcService rpcService = registration.getInstance();
return (S) rpcService;
}
/**
* Unregisters all services.
*
* @see java.lang.AutoCloseable#close()
*/
@Override
public void close() {
//NOOP
}
@Override
public <T> RequestContext<T> createRequestContext() {
if (!tracker.tryAcquire()) {
LOG.trace("Device queue {} at capacity", this);
return null;
} else {
LOG.trace("Acquired semaphore for {}, available permits:{} ", nodeInstanceIdentifier.getKey().getId().getValue(), tracker.availablePermits());
}
final Long xid = deviceInfo.reserveXidForDeviceMessage();
if (xid == null) {
LOG.warn("Xid cannot be reserved for new RequestContext, node:{}", nodeInstanceIdentifier.getKey().getId().getValue());
tracker.release();
return null;
}
return new AbstractRequestContext<T>(xid) {
@Override
public void close() {
tracker.release();
final long xid = getXid().getValue();
LOG.trace("Removed request context with xid {}", xid);
messageSpy.spyMessage(RpcContextImpl.class, MessageSpy.STATISTIC_GROUP.REQUEST_STACK_FREED);
}
};
}
@Override
public <S extends RpcService> void unregisterRpcServiceImplementation(final Class<S> serviceClass) {
LOG.trace("Try to unregister serviceClass {} for Node {}", serviceClass, nodeInstanceIdentifier.getKey().getId());
final RoutedRpcRegistration<?> rpcRegistration = rpcRegistrations.remove(serviceClass);
if (rpcRegistration != null) {
rpcRegistration.unregisterPath(NodeContext.class, nodeInstanceIdentifier);
rpcRegistration.close();
LOG.debug("Un-registration serviceClass {} for Node {}", serviceClass.getSimpleName(), nodeInstanceIdentifier.getKey().getId().getValue());
}
}
@VisibleForTesting
boolean isEmptyRpcRegistrations() {
return this.rpcRegistrations.isEmpty();
}
@Override
public CONTEXT_STATE getState() {
return this.state;
}
@Override
public ServiceGroupIdentifier getServiceIdentifier() {
return this.deviceInfo.getServiceIdentifier();
}
@Override
public DeviceInfo getDeviceInfo() {
return this.deviceInfo;
}
@Override
public ListenableFuture<Void> stopClusterServices() {
if (CONTEXT_STATE.TERMINATION.equals(this.state)) {
return Futures.immediateCancelledFuture();
}
return Futures.transform(Futures.immediateFuture(null), new Function<Object, Void>() {
@Nullable
@Override
public Void apply(@Nullable Object input) {
for (final Iterator<Entry<Class<?>, RoutedRpcRegistration<?>>> iterator = Iterators
.consumingIterator(rpcRegistrations.entrySet().iterator()); iterator.hasNext(); ) {
final RoutedRpcRegistration<?> rpcRegistration = iterator.next().getValue();
rpcRegistration.unregisterPath(NodeContext.class, nodeInstanceIdentifier);
rpcRegistration.close();
if (LOG.isDebugEnabled()) {
LOG.debug("Closing RPC Registration of service {} for device {}.", rpcRegistration.getServiceType().getSimpleName(),
nodeInstanceIdentifier.getKey().getId().getValue());
}
}
return null;
}
});
}
@Override
public boolean onContextInstantiateService(final MastershipChangeListener mastershipChangeListener) {
MdSalRegistrationUtils.registerServices(this, deviceContext, extensionConverterProvider, convertorExecutor);
if (isStatisticsRpcEnabled && !deviceContext.canUseSingleLayerSerialization()) {
MdSalRegistrationUtils.registerStatCompatibilityServices(
this,
deviceContext,
notificationPublishService,
convertorExecutor);
}
return true;
}
}