/*
 * 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.transport;

import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelPromise;
import org.apache.dubbo.common.BatchExecutorQueue;
import org.apache.dubbo.rpc.protocol.tri.command.QueuedCommand;

import java.util.concurrent.CompletionException;
import java.util.concurrent.Executor;

public class TripleWriteQueue extends BatchExecutorQueue<QueuedCommand> {

    public TripleWriteQueue() {
    }

    public TripleWriteQueue(int chunkSize) {
        super(chunkSize);
    }

    public ChannelFuture enqueue(QueuedCommand command, boolean rst) {
        return enqueue(command);
    }

    public ChannelFuture enqueue(QueuedCommand command) {
        return this.enqueueFuture(command, command.channel().eventLoop());
    }

    public ChannelFuture enqueueFuture(QueuedCommand command, Executor executor) {
        ChannelPromise promise = command.promise();
        if (promise == null) {
            Channel ch = command.channel();
            promise = ch.newPromise();
            command.promise(promise);
        }
        super.enqueue(command, executor);
        return promise;
    }

    @Override
    protected void prepare(QueuedCommand item) {
        try {
            Channel channel = item.channel();
            item.run(channel);
        } catch (CompletionException e) {
            item.promise().tryFailure(e.getCause());
        }
    }

    @Override
    protected void flush(QueuedCommand item) {
        try {
            Channel channel = item.channel();
            item.run(channel);
            channel.flush();
        } catch (CompletionException e) {
            item.promise().tryFailure(e.getCause());
        }
    }
}
