dubbo QueuedCommand 源码
dubbo QueuedCommand 代码
文件路径：/dubbo-rpc/dubbo-rpc-triple/src/main/java/org/apache/dubbo/rpc/protocol/tri/command/QueuedCommand.java
/*
* 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.tri.command;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
public abstract class QueuedCommand {
private ChannelPromise promise;
public ChannelPromise promise() {
return promise;
}
public void promise(ChannelPromise promise) {
this.promise = promise;
}
public void cancel() {
promise.tryFailure(new IllegalStateException("Canceled"));
}
public void run(Channel channel) {
if (channel.isActive()) {
channel.write(this, promise);
} else {
promise.trySuccess();
}
}
public final void send(ChannelHandlerContext ctx, ChannelPromise promise) {
if (ctx.channel().isActive()) {
doSend(ctx, promise);
ctx.flush();
}
}
public abstract void doSend(ChannelHandlerContext ctx, ChannelPromise promise);
}
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