All Downloads are FREE. Search and download functionalities are using the official Maven repository.
  • Log In
  • Register

    • io.netty.handler.codec.stomp.StompSubframeEncoder Maven / Gradle / Ivy

    Go to download

    This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

    There is a newer version: 35.0.0.Beta1
    Show newest version
    /*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project 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 io.netty.handler.codec.stomp;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageEncoder;
import io.netty.util.CharsetUtil;

import java.util.List;
import java.util.Map.Entry;

/**
 * Encodes a {@link StompFrame} or a {@link StompSubframe} into a {@link ByteBuf}.
 */
public class StompSubframeEncoder extends MessageToMessageEncoder {

    @Override
    protected void encode(ChannelHandlerContext ctx, StompSubframe msg, List out) throws Exception {
        if (msg instanceof StompFrame) {
            StompFrame frame = (StompFrame) msg;
            ByteBuf frameBuf = encodeFrame(frame, ctx);
            out.add(frameBuf);
            ByteBuf contentBuf = encodeContent(frame, ctx);
            out.add(contentBuf);
        } else if (msg instanceof StompHeadersSubframe) {
            StompHeadersSubframe frame = (StompHeadersSubframe) msg;
            ByteBuf buf = encodeFrame(frame, ctx);
            out.add(buf);
        } else if (msg instanceof StompContentSubframe) {
            StompContentSubframe stompContentSubframe = (StompContentSubframe) msg;
            ByteBuf buf = encodeContent(stompContentSubframe, ctx);
            out.add(buf);
        }
    }

    private static ByteBuf encodeContent(StompContentSubframe content, ChannelHandlerContext ctx) {
        if (content instanceof LastStompContentSubframe) {
            ByteBuf buf = ctx.alloc().buffer(content.content().readableBytes() + 1);
            buf.writeBytes(content.content());
            buf.writeByte(StompConstants.NUL);
            return buf;
        } else {
            return content.content().retain();
        }
    }

    private static ByteBuf encodeFrame(StompHeadersSubframe frame, ChannelHandlerContext ctx) {
        ByteBuf buf = ctx.alloc().buffer();

        buf.writeCharSequence(frame.command().toString(), CharsetUtil.UTF_8);
        buf.writeByte(StompConstants.LF);
        for (Entry entry : frame.headers()) {
            ByteBufUtil.writeUtf8(buf, entry.getKey());
            buf.writeByte(StompConstants.COLON);
            ByteBufUtil.writeUtf8(buf, entry.getValue());
            buf.writeByte(StompConstants.LF);
        }
        buf.writeByte(StompConstants.LF);
        return buf;
    }
}
    
    
    
    

    




    
    
    © 2015 - 2025 Weber Informatics LLC | Privacy Policy