StompSubframeEncoder.java — netty Source File

Source Code

/*
 * 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:
 *
 *   https://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.concurrent.FastThreadLocal;
import io.netty.util.internal.AppendableCharSequence;

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

import static io.netty.handler.codec.stomp.StompConstants.NUL;
import static io.netty.handler.codec.stomp.StompHeaders.ACCEPT_VERSION;
import static io.netty.handler.codec.stomp.StompHeaders.ACK;
import static io.netty.handler.codec.stomp.StompHeaders.CONTENT_LENGTH;
import static io.netty.handler.codec.stomp.StompHeaders.CONTENT_TYPE;
import static io.netty.handler.codec.stomp.StompHeaders.DESTINATION;
import static io.netty.handler.codec.stomp.StompHeaders.HEART_BEAT;
import static io.netty.handler.codec.stomp.StompHeaders.HOST;
import static io.netty.handler.codec.stomp.StompHeaders.ID;
import static io.netty.handler.codec.stomp.StompHeaders.LOGIN;
import static io.netty.handler.codec.stomp.StompHeaders.MESSAGE;
import static io.netty.handler.codec.stomp.StompHeaders.MESSAGE_ID;
import static io.netty.handler.codec.stomp.StompHeaders.PASSCODE;
import static io.netty.handler.codec.stomp.StompHeaders.RECEIPT;
import static io.netty.handler.codec.stomp.StompHeaders.RECEIPT_ID;
import static io.netty.handler.codec.stomp.StompHeaders.SERVER;
import static io.netty.handler.codec.stomp.StompHeaders.SESSION;
import static io.netty.handler.codec.stomp.StompHeaders.SUBSCRIPTION;
import static io.netty.handler.codec.stomp.StompHeaders.TRANSACTION;
import static io.netty.handler.codec.stomp.StompHeaders.VERSION;

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

    private static final int ESCAPE_HEADER_KEY_CACHE_LIMIT = 32;
    private static final float DEFAULT_LOAD_FACTOR = 0.75f;
    private static final FastThreadLocal<LinkedHashMap<CharSequence, CharSequence>> ESCAPE_HEADER_KEY_CACHE =
            new FastThreadLocal<LinkedHashMap<CharSequence, CharSequence>>() {
                @Override
                protected LinkedHashMap<CharSequence, CharSequence> initialValue() throws Exception {
// ... (192 more lines)