/*
 *  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.coyote.http2;

/**
 * HTTP/2 protocol constants.
 */
public class Constants {

    /**
     * RFC 7540 prioritisation default weight.
     *
     * @deprecated Unused. Will be removed in Tomcat 11 onwards.
     */
    @Deprecated
    public static final int DEFAULT_WEIGHT = 16;

    // Parsing
    /**
     * Default header read buffer size.
     */
    static final int DEFAULT_HEADER_READ_BUFFER_SIZE = 1024;

    // Header frame size
    // TODO: Is 1k the optimal value?
    /**
     * Default headers frame size.
     */
    static final int DEFAULT_HEADERS_FRAME_SIZE = 1024;
    // TODO: Is 64 too big? Just the status header with compression
    /**
     * Default headers ACK frame size.
     */
    static final int DEFAULT_HEADERS_ACK_FRAME_SIZE = 64;

    // Limits
    /**
     * Default maximum cookie count.
     */
    static final int DEFAULT_MAX_COOKIE_COUNT = 200;
    /**
     * Default maximum header count.
     */
    static final int DEFAULT_MAX_HEADER_COUNT = 100;
    /**
     * Default maximum header size.
     */
    static final int DEFAULT_MAX_HEADER_SIZE = 8 * 1024;
    /**
     * Default maximum trailer count.
     */
    static final int DEFAULT_MAX_TRAILER_COUNT = 100;
    /**
     * Default maximum trailer size.
     */
    static final int DEFAULT_MAX_TRAILER_SIZE = 8 * 1024;

    /**
     * Private constructor to prevent instantiation.
     */
    private Constants() {
        // Hide default constructor
    }
}
