com.twitter.http2.DefaultHttpGoAwayFrame Maven / Gradle / Ivy

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/*
 * Copyright 2015 Twitter, Inc.
 *
 * Licensed 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 com.twitter.http2;

import io.netty.util.internal.StringUtil;

/**
 * The default {@link HttpGoAwayFrame} implementation.
 */
public class DefaultHttpGoAwayFrame implements HttpGoAwayFrame {

    private int lastStreamId;
    private HttpErrorCode errorCode;

    /**
     * Creates a new instance.
     *
     * @param lastStreamId the Last-Stream-ID of this frame
     * @param code         the error code of this frame
     */
    public DefaultHttpGoAwayFrame(int lastStreamId, int code) {
        this(lastStreamId, HttpErrorCode.valueOf(code));
    }

    /**
     * Creates a new instance.
     *
     * @param lastStreamId the Last-Stream-ID of this frame
     * @param errorCode    the error code of this frame
     */
    public DefaultHttpGoAwayFrame(int lastStreamId, HttpErrorCode errorCode) {
        setLastStreamId(lastStreamId);
        setErrorCode(errorCode);
    }

    @Override
    public int getLastStreamId() {
        return lastStreamId;
    }

    @Override
    public HttpGoAwayFrame setLastStreamId(int lastStreamId) {
        if (lastStreamId < 0) {
            throw new IllegalArgumentException(
                    "Last-Stream-ID cannot be negative: " + lastStreamId);
        }
        this.lastStreamId = lastStreamId;
        return this;
    }

    @Override
    public HttpErrorCode getErrorCode() {
        return errorCode;
    }

    @Override
    public HttpGoAwayFrame setErrorCode(HttpErrorCode errorCode) {
        this.errorCode = errorCode;
        return this;
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder();
        buf.append(StringUtil.simpleClassName(this));
        buf.append(StringUtil.NEWLINE);
        buf.append("--> Last-Stream-ID = ");
        buf.append(getLastStreamId());
        buf.append(StringUtil.NEWLINE);
        buf.append("--> Error Code: ");
        buf.append(getErrorCode().toString());
        return buf.toString();
    }
}