| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * 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.grpc.ctl; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.util.concurrent.Striped; |
| import io.grpc.CallOptions; |
| import io.grpc.Channel; |
| import io.grpc.ClientCall; |
| import io.grpc.ClientInterceptor; |
| import io.grpc.ForwardingClientCall; |
| import io.grpc.ForwardingClientCallListener; |
| import io.grpc.ManagedChannel; |
| import io.grpc.ManagedChannelBuilder; |
| import io.grpc.Metadata; |
| import io.grpc.MethodDescriptor; |
| import io.grpc.Status; |
| import io.grpc.StatusRuntimeException; |
| import org.onlab.util.Tools; |
| import org.onosproject.cfg.ComponentConfigService; |
| import org.onosproject.grpc.api.GrpcChannelId; |
| import org.onosproject.grpc.api.GrpcController; |
| import org.onosproject.grpc.proto.dummy.Dummy; |
| import org.onosproject.grpc.proto.dummy.DummyServiceGrpc; |
| import org.onosproject.net.DeviceId; |
| import org.osgi.service.component.ComponentContext; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Modified; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Dictionary; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.locks.Lock; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Default implementation of the GrpcController. |
| */ |
| @Component(immediate = true, service = GrpcController.class) |
| public class GrpcControllerImpl implements GrpcController { |
| |
| private static final String SET_FORWARDING_PIPELINE_CONFIG_METHOD = "p4.P4Runtime/SetForwardingPipelineConfig"; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ComponentConfigService componentConfigService; |
| |
| // Hint: set to true to log all gRPC messages received/sent on all channels |
| // Does not enable log on existing channels |
| private static final boolean DEFAULT_LOG_LEVEL = false; |
| //@Property(name = "enableMessageLog", boolValue = DEFAULT_LOG_LEVEL, |
| // label = "Indicates whether to log all gRPC messages sent and received on all channels") |
| public static boolean enableMessageLog = DEFAULT_LOG_LEVEL; |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private Map<GrpcChannelId, ManagedChannel> channels; |
| private final Striped<Lock> channelLocks = Striped.lock(30); |
| |
| @Activate |
| public void activate() { |
| componentConfigService.registerProperties(getClass()); |
| channels = new ConcurrentHashMap<>(); |
| log.info("Started"); |
| } |
| |
| @Modified |
| public void modified(ComponentContext context) { |
| if (context != null) { |
| Dictionary<?, ?> properties = context.getProperties(); |
| enableMessageLog = Tools.isPropertyEnabled(properties, "enableMessageLog", |
| DEFAULT_LOG_LEVEL); |
| log.info("Configured. Log of gRPC messages is {}", enableMessageLog ? "enabled" : "disabled"); |
| } |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| componentConfigService.unregisterProperties(getClass(), false); |
| channels.values().forEach(ManagedChannel::shutdown); |
| channels.clear(); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public ManagedChannel connectChannel(GrpcChannelId channelId, |
| ManagedChannelBuilder<?> channelBuilder) |
| throws IOException { |
| checkNotNull(channelId); |
| checkNotNull(channelBuilder); |
| |
| Lock lock = channelLocks.get(channelId); |
| lock.lock(); |
| |
| try { |
| channelBuilder.intercept(new InternalLogChannelInterceptor(channelId)); |
| ManagedChannel channel = channelBuilder.build(); |
| // Forced connection not yet implemented. Use workaround... |
| // channel.getState(true); |
| doDummyMessage(channel); |
| channels.put(channelId, channel); |
| return channel; |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| private void doDummyMessage(ManagedChannel channel) throws IOException { |
| DummyServiceGrpc.DummyServiceBlockingStub dummyStub = DummyServiceGrpc |
| .newBlockingStub(channel) |
| .withDeadlineAfter(CONNECTION_TIMEOUT_SECONDS, TimeUnit.SECONDS); |
| try { |
| dummyStub.sayHello(Dummy.DummyMessageThatNoOneWouldReallyUse |
| .getDefaultInstance()); |
| } catch (StatusRuntimeException e) { |
| if (e.getStatus() != Status.UNIMPLEMENTED) { |
| // UNIMPLEMENTED means that the server received our message but |
| // doesn't know how to handle it. Hence, channel is open. |
| throw new IOException(e); |
| } |
| } |
| } |
| |
| @Override |
| public boolean isChannelOpen(GrpcChannelId channelId) { |
| checkNotNull(channelId); |
| |
| Lock lock = channelLocks.get(channelId); |
| lock.lock(); |
| |
| try { |
| if (!channels.containsKey(channelId)) { |
| log.warn("Can't check if channel open for unknown channel ID {}", |
| channelId); |
| return false; |
| } |
| try { |
| doDummyMessage(channels.get(channelId)); |
| return true; |
| } catch (IOException e) { |
| log.debug("Unable to send dummy message to {}: {}", |
| channelId, e.getCause().getMessage()); |
| return false; |
| } |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| @Override |
| public void disconnectChannel(GrpcChannelId channelId) { |
| checkNotNull(channelId); |
| |
| Lock lock = channelLocks.get(channelId); |
| lock.lock(); |
| |
| try { |
| if (!channels.containsKey(channelId)) { |
| // Nothing to do. |
| return; |
| } |
| ManagedChannel channel = channels.get(channelId); |
| |
| try { |
| channel.shutdown().awaitTermination(5, TimeUnit.SECONDS); |
| } catch (InterruptedException e) { |
| log.warn("Channel {} didn't shut down in time."); |
| channel.shutdownNow(); |
| Thread.currentThread().interrupt(); |
| } |
| |
| channels.remove(channelId); |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| @Override |
| public Map<GrpcChannelId, ManagedChannel> getChannels() { |
| return ImmutableMap.copyOf(channels); |
| } |
| |
| @Override |
| public Collection<ManagedChannel> getChannels(final DeviceId deviceId) { |
| checkNotNull(deviceId); |
| final Set<ManagedChannel> deviceChannels = new HashSet<>(); |
| channels.forEach((k, v) -> { |
| if (k.deviceId().equals(deviceId)) { |
| deviceChannels.add(v); |
| } |
| }); |
| |
| return ImmutableSet.copyOf(deviceChannels); |
| } |
| |
| @Override |
| public Optional<ManagedChannel> getChannel(GrpcChannelId channelId) { |
| checkNotNull(channelId); |
| |
| Lock lock = channelLocks.get(channelId); |
| lock.lock(); |
| |
| try { |
| return Optional.ofNullable(channels.get(channelId)); |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| /** |
| * gRPC client interceptor that logs all messages sent and received. |
| */ |
| private final class InternalLogChannelInterceptor implements ClientInterceptor { |
| |
| private final GrpcChannelId channelId; |
| |
| private InternalLogChannelInterceptor(GrpcChannelId channelId) { |
| this.channelId = channelId; |
| } |
| |
| @Override |
| public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall( |
| MethodDescriptor<ReqT, RespT> methodDescriptor, |
| CallOptions callOptions, Channel channel) { |
| return new ForwardingClientCall.SimpleForwardingClientCall<ReqT, RespT>( |
| channel.newCall(methodDescriptor, callOptions.withoutWaitForReady())) { |
| |
| @Override |
| public void sendMessage(ReqT message) { |
| if (enableMessageLog && !methodDescriptor.getFullMethodName() |
| .startsWith(SET_FORWARDING_PIPELINE_CONFIG_METHOD)) { |
| log.info("*** SENDING GRPC MESSAGE [{}]\n{}:\n{}", |
| channelId, methodDescriptor.getFullMethodName(), |
| message.toString()); |
| } |
| super.sendMessage(message); |
| } |
| |
| @Override |
| public void start(Listener<RespT> responseListener, Metadata headers) { |
| |
| ClientCall.Listener<RespT> listener = new ForwardingClientCallListener<RespT>() { |
| @Override |
| protected Listener<RespT> delegate() { |
| return responseListener; |
| } |
| |
| @Override |
| public void onMessage(RespT message) { |
| if (enableMessageLog) { |
| log.info("*** RECEIVED GRPC MESSAGE [{}]\n{}:\n{}", |
| channelId, methodDescriptor.getFullMethodName(), |
| message.toString()); |
| } |
| super.onMessage(message); |
| } |
| }; |
| super.start(listener, headers); |
| } |
| }; |
| } |
| } |
| } |