org.wso2.broker.amqp.codec.frames.BasicPublish Maven / Gradle / Ivy

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/*
 * Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.wso2.broker.amqp.codec.frames;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.wso2.broker.amqp.codec.AmqpChannel;
import org.wso2.broker.amqp.codec.AmqpConnectionHandler;
import org.wso2.broker.amqp.codec.InMemoryMessageAggregator;
import org.wso2.broker.common.data.types.ShortString;

/**
 * AMQP frame for basic.publish
 * Parameter Summary:
 *     1. reserved-1 (short) - deprecated
 *     2. exchange (ShortString) - exchange name
 *     3. routingkey (ShortString) - message routing key
 *     4. mandatory (bit) - indicate mandatory routing
 *     5. immediate (bit) - request immediate delivery
 */
public class BasicPublish extends MethodFrame {
    private static final Logger LOGGER = LoggerFactory.getLogger(BasicPublish.class);

    private final ShortString exchange;
    private final ShortString routingKey;
    private final boolean mandatory;
    private final boolean immediate;

    public BasicPublish(int channel, ShortString exchange, ShortString routingKey, boolean mandatory,
            boolean immediate) {
        super(channel, (short) 60, (short) 40);
        this.exchange = exchange;
        this.routingKey = routingKey;
        this.mandatory = mandatory;
        this.immediate = immediate;
    }

    @Override
    protected long getMethodBodySize() {
        return 2L + exchange.getSize() + routingKey.getSize() + 1L;
    }

    @Override
    protected void writeMethod(ByteBuf buf) {
        buf.writeShort(0);
        exchange.write(buf);
        routingKey.write(buf);

        byte flags = 0x0;
        if (mandatory) {
            flags |= 0x1;
        }
        if (immediate) {
            flags |= 0x2;
        }
        buf.writeByte(flags);
    }

    @Override
    public void handle(ChannelHandlerContext ctx, AmqpConnectionHandler connectionHandler) {
        AmqpChannel channel = connectionHandler.getChannel(getChannel());
        InMemoryMessageAggregator inMemoryMessageAggregator = channel.createMessageAggregator();
        inMemoryMessageAggregator.basicPublishReceived(routingKey, exchange);
    }

    public static AmqMethodBodyFactory getFactory() {
        return (buf, channel, size) -> {
            buf.skipBytes(2);
            ShortString exchange = ShortString.parse(buf);
            ShortString routingKey = ShortString.parse(buf);
            byte flags = buf.readByte();
            boolean mandatory = (flags & 0x1) == 0x1;
            boolean immediate = (flags & 0x2) == 0x2;
            return new BasicPublish(channel, exchange, routingKey, mandatory, immediate);
        };
    }
}