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/*
* 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.thrift;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.utils.AtomicPositiveInteger;
import org.apache.dubbo.remoting.RemotingException;
import org.apache.dubbo.remoting.TimeoutException;
import org.apache.dubbo.remoting.exchange.ExchangeClient;
import org.apache.dubbo.rpc.AppResponse;
import org.apache.dubbo.rpc.AsyncRpcResult;
import org.apache.dubbo.rpc.FutureContext;
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.RpcInvocation;
import org.apache.dubbo.rpc.protocol.AbstractInvoker;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.locks.ReentrantLock;
import static org.apache.dubbo.common.constants.CommonConstants.DEFAULT_TIMEOUT;
import static org.apache.dubbo.common.constants.CommonConstants.GROUP_KEY;
import static org.apache.dubbo.common.constants.CommonConstants.INTERFACE_KEY;
import static org.apache.dubbo.common.constants.CommonConstants.PATH_KEY;
import static org.apache.dubbo.common.constants.CommonConstants.TIMEOUT_KEY;
import static org.apache.dubbo.remoting.Constants.CHANNEL_ATTRIBUTE_READONLY_KEY;
import static org.apache.dubbo.rpc.Constants.TOKEN_KEY;
/**
* @since 2.7.0, use https://github.com/dubbo/dubbo-rpc-native-thrift instead
*/
@Deprecated
public class ThriftInvoker extends AbstractInvoker {
private final ExchangeClient[] clients;
private final AtomicPositiveInteger index = new AtomicPositiveInteger();
private final ReentrantLock destroyLock = new ReentrantLock();
private final Set> invokers;
public ThriftInvoker(Class service, URL url, ExchangeClient[] clients) {
this(service, url, clients, null);
}
public ThriftInvoker(Class type, URL url, ExchangeClient[] clients, Set> invokers) {
super(type, url, new String[]{INTERFACE_KEY, GROUP_KEY, TOKEN_KEY});
this.clients = clients;
this.invokers = invokers;
}
@Override
protected Result doInvoke(Invocation invocation) throws Throwable {
RpcInvocation inv = (RpcInvocation) invocation;
final String methodName;
methodName = invocation.getMethodName();
inv.setAttachment(PATH_KEY, getUrl().getPath());
// for thrift codec
inv.setAttachment(ThriftCodec.PARAMETER_CLASS_NAME_GENERATOR, getUrl().getParameter(
ThriftCodec.PARAMETER_CLASS_NAME_GENERATOR, DubboClassNameGenerator.NAME));
ExchangeClient currentClient;
if (clients.length == 1) {
currentClient = clients[0];
} else {
currentClient = clients[index.getAndIncrement() % clients.length];
}
try {
int timeout = getUrl().getMethodParameter(methodName, TIMEOUT_KEY, DEFAULT_TIMEOUT);
ExecutorService executor = getCallbackExecutor(getUrl(), inv);
CompletableFuture appResponseFuture = currentClient.request(inv, timeout, executor).thenApply(obj -> (AppResponse) obj);
// save for 2.6.x compatibility, for example, TraceFilter in Zipkin uses com.alibaba.xxx.FutureAdapter
FutureContext.getContext().setCompatibleFuture(appResponseFuture);
AsyncRpcResult result = new AsyncRpcResult(appResponseFuture, invocation);
result.setExecutor(executor);
return result;
} catch (TimeoutException e) {
throw new RpcException(RpcException.TIMEOUT_EXCEPTION, e.getMessage(), e);
} catch (RemotingException e) {
throw new RpcException(RpcException.NETWORK_EXCEPTION, e.getMessage(), e);
}
}
@Override
public boolean isAvailable() {
if (!super.isAvailable()) {
return false;
}
for (ExchangeClient client : clients) {
if (client.isConnected()
&& !client.hasAttribute(CHANNEL_ATTRIBUTE_READONLY_KEY)) {
//cannot write == not Available ?
return true;
}
}
return false;
}
@Override
public void destroy() {
// in order to avoid closing a client multiple times, a counter is used in case of connection per jvm, every
// time when client.close() is called, counter counts down once, and when counter reaches zero, client will be
// closed.
if (super.isDestroyed()) {
return;
} else {
// double check to avoid dup close
destroyLock.lock();
try {
if (super.isDestroyed()) {
return;
}
super.destroy();
if (invokers != null) {
invokers.remove(this);
}
for (ExchangeClient client : clients) {
try {
client.close();
} catch (Throwable t) {
logger.warn(t.getMessage(), t);
}
}
} finally {
destroyLock.unlock();
}
}
}
}