org.apache.dubbo.rpc.protocol.grpc.GrpcInvoker Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo Show documentation
Show all versions of dubbo Show documentation
The all in one project of dubbo
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.dubbo.rpc.protocol.grpc;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Result;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.protocol.AbstractInvoker;
import io.grpc.Status;
import io.grpc.StatusException;
import java.util.concurrent.locks.ReentrantLock;
public class GrpcInvoker extends AbstractInvoker {
private final ReentrantLock destroyLock = new ReentrantLock();
private final Invoker target;
private ReferenceCountManagedChannel channel;
// private static List grpcExceptions = new ArrayList<>();
// static {
// grpcExceptions.add();
// }
public GrpcInvoker(Class type, URL url, Invoker target, ReferenceCountManagedChannel channel) {
super(type, url);
this.target = target;
this.channel = channel;
}
@Override
protected Result doInvoke(Invocation invocation) throws Throwable {
try {
Result result = target.invoke(invocation);
// FIXME result is an AsyncRpcResult instance.
Throwable e = result.getException();
if (e != null) {
throw getRpcException(getInterface(), getUrl(), invocation, e);
}
return result;
} catch (RpcException e) {
if (e.getCode() == RpcException.UNKNOWN_EXCEPTION) {
e.setCode(getErrorCode(e.getCause()));
}
throw e;
} catch (Throwable e) {
throw getRpcException(getInterface(), getUrl(), invocation, e);
}
}
@Override
public boolean isAvailable() {
return super.isAvailable() && !channel.isShutdown() && !channel.isTerminated();
}
@Override
public boolean isDestroyed() {
return super.isDestroyed() || channel.isShutdown() || channel.isTerminated();
}
@Override
public void destroy() {
if (!super.isDestroyed()) {
// double check to avoid dup close
destroyLock.lock();
try {
if (super.isDestroyed()) {
return;
}
super.destroy();
channel.shutdown();
} finally {
destroyLock.unlock();
}
}
}
private RpcException getRpcException(Class type, URL url, Invocation invocation, Throwable e) {
RpcException re = new RpcException("Failed to invoke remote service: " + type + ", method: "
+ invocation.getMethodName() + ", cause: " + e.getMessage(), e);
re.setCode(getErrorCode(e));
return re;
}
/**
* FIXME, convert gRPC exceptions to equivalent Dubbo exceptions.
*
* @param e
* @return
*/
private int getErrorCode(Throwable e) {
if (e instanceof StatusException) {
StatusException statusException = (StatusException) e;
Status status = statusException.getStatus();
if (status.getCode() == Status.Code.DEADLINE_EXCEEDED) {
return RpcException.TIMEOUT_EXCEPTION;
}
}
return RpcException.UNKNOWN_EXCEPTION;
}
}