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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2014-2015 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 * file and include the License file at packager/legal/LICENSE.txt.
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 * GPL Classpath Exception:
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 *
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 */

package org.glassfish.grizzly.http2;

import java.io.IOException;
import org.glassfish.grizzly.http2.frames.ErrorCode;

/**
 * SPDY Session exception.
 * 
 * Unlike {@link SpdyStreamException}, this exception means severe problem
 * related to the entire SPDY session.
 * 
 * @author Alexey Stashok
 */
public final class Http2ConnectionException extends IOException {
    private final ErrorCode errorCode;

    /**
     * Construct Http2ConnectionException.
     * 
     * @param errorCode 
     */
    public Http2ConnectionException(final ErrorCode errorCode) {
        this(errorCode, null);
    }

    /**
     * Construct Http2ConnectionException.
     * 
     * @param errorCode 
     * @param message 
     */
    public Http2ConnectionException(final ErrorCode errorCode,
            final String message) {
        super(message);
        this.errorCode = errorCode;
    }

    /**
     * @return the {@link ErrorCode} reason to be sent with a GoAway.
     */
    public ErrorCode getErrorCode() {
        return errorCode;
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder(128);
        sb.append(getClass().getName())
                .append(" errorCode=").append(errorCode);

        String message = getLocalizedMessage();
        
        return message != null ?
                (sb.append(": ").append(message).toString()) : sb.toString();
    }
}