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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.dubbo;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.remoting.Channel;
import org.apache.dubbo.remoting.ChannelHandler;
import org.apache.dubbo.remoting.RemotingException;
import org.apache.dubbo.remoting.TimeoutException;
import org.apache.dubbo.remoting.exchange.ExchangeClient;
import org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeClient;
import org.apache.dubbo.remoting.transport.ClientDelegate;
import org.apache.dubbo.rpc.AppResponse;
import org.apache.dubbo.rpc.AsyncRpcResult;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Result;
import org.apache.dubbo.rpc.RpcContext;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.RpcInvocation;
import org.apache.dubbo.rpc.protocol.AbstractInvoker;
import org.apache.dubbo.rpc.support.RpcUtils;
import java.net.InetSocketAddress;
import java.util.concurrent.CompletableFuture;
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.PATH_KEY;
import static org.apache.dubbo.remoting.Constants.SENT_KEY;
import static org.apache.dubbo.rpc.Constants.TOKEN_KEY;
import static org.apache.dubbo.rpc.protocol.dubbo.Constants.CALLBACK_SERVICE_KEY;
/**
* Server push uses this Invoker to continuously push data to client.
* Wrap the existing invoker on the channel.
*/
class ChannelWrappedInvoker extends AbstractInvoker {
private final Channel channel;
private final String serviceKey;
private final ExchangeClient currentClient;
ChannelWrappedInvoker(Class serviceType, Channel channel, URL url, String serviceKey) {
super(serviceType, url, new String[]{GROUP_KEY, TOKEN_KEY});
this.channel = channel;
this.serviceKey = serviceKey;
this.currentClient = new HeaderExchangeClient(new ChannelWrapper(this.channel), false);
}
@Override
protected Result doInvoke(Invocation invocation) throws Throwable {
RpcInvocation inv = (RpcInvocation) invocation;
// use interface's name as service path to export if it's not found on client side
inv.setAttachment(PATH_KEY, getInterface().getName());
inv.setAttachment(CALLBACK_SERVICE_KEY, serviceKey);
try {
if (RpcUtils.isOneway(getUrl(), inv)) { // may have concurrency issue
currentClient.send(inv, getUrl().getMethodParameter(invocation.getMethodName(), SENT_KEY, false));
return AsyncRpcResult.newDefaultAsyncResult(invocation);
} else {
final String methodName = RpcUtils.getMethodName(invocation);
final int timeout = (int) RpcUtils.getTimeout(getUrl(), methodName, RpcContext.getContext(), DEFAULT_TIMEOUT);
CompletableFuture appResponseFuture = currentClient.request(inv, timeout, null).thenApply(obj -> (AppResponse) obj);
return new AsyncRpcResult(appResponseFuture, inv);
}
} catch (RpcException e) {
throw e;
} catch (TimeoutException e) {
throw new RpcException(RpcException.TIMEOUT_EXCEPTION, e.getMessage(), e);
} catch (RemotingException e) {
throw new RpcException(RpcException.NETWORK_EXCEPTION, e.getMessage(), e);
} catch (Throwable e) { // here is non-biz exception, wrap it.
throw new RpcException(e.getMessage(), e);
}
}
@Override
public void destroy() {
// super.destroy();
// try {
// channel.close();
// } catch (Throwable t) {
// logger.warn(t.getMessage(), t);
// }
}
public static class ChannelWrapper extends ClientDelegate {
private final Channel channel;
private final URL url;
ChannelWrapper(Channel channel) {
this.channel = channel;
this.url = channel.getUrl().addParameter("codec", DubboCodec.NAME);
}
@Override
public URL getUrl() {
return url;
}
@Override
public ChannelHandler getChannelHandler() {
return channel.getChannelHandler();
}
@Override
public InetSocketAddress getLocalAddress() {
return channel.getLocalAddress();
}
@Override
public void close() {
channel.close();
}
@Override
public boolean isClosed() {
return channel == null || channel.isClosed();
}
@Override
public void reset(URL url) {
throw new RpcException("ChannelInvoker can not reset.");
}
@Override
public InetSocketAddress getRemoteAddress() {
return channel.getLocalAddress();
}
@Override
public boolean isConnected() {
return channel != null && channel.isConnected();
}
@Override
public boolean hasAttribute(String key) {
return channel.hasAttribute(key);
}
@Override
public Object getAttribute(String key) {
return channel.getAttribute(key);
}
@Override
public void setAttribute(String key, Object value) {
channel.setAttribute(key, value);
}
@Override
public void removeAttribute(String key) {
channel.removeAttribute(key);
}
@Override
public void reconnect() throws RemotingException {
}
@Override
public void send(Object message) throws RemotingException {
channel.send(message);
}
@Override
public void send(Object message, boolean sent) throws RemotingException {
channel.send(message, sent);
}
}
}