com.github.sparkfy.network.protocol.StreamResponse.java Source code

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Here is the source code for com.github.sparkfy.network.protocol.StreamResponse.java

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/*
 * 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 com.github.sparkfy.network.protocol;

import com.github.sparkfy.network.buffer.ManagedBuffer;
import com.google.common.base.Objects;
import io.netty.buffer.ByteBuf;

/**
 * Response to {@link StreamRequest} when the stream has been successfully opened.
 * <p>
 * Note the message itself does not contain the stream data. That is written separately by the
 * sender. The receiver is expected to set a temporary channel handler that will consume the
 * number of bytes this message says the stream has.
 */
public final class StreamResponse extends AbstractResponseMessage {
    public final String streamId;
    public final long byteCount;

    public StreamResponse(String streamId, long byteCount, ManagedBuffer buffer) {
        super(buffer, false);
        this.streamId = streamId;
        this.byteCount = byteCount;
    }

    @Override
    public Type type() {
        return Type.StreamResponse;
    }

    @Override
    public int encodedLength() {
        return 8 + Encoders.Strings.encodedLength(streamId);
    }

    /** Encoding does NOT include 'buffer' itself. See {@link MessageEncoder}. */
    @Override
    public void encode(ByteBuf buf) {
        Encoders.Strings.encode(buf, streamId);
        buf.writeLong(byteCount);
    }

    @Override
    public ResponseMessage createFailureResponse(String error) {
        return new StreamFailure(streamId, error);
    }

    public static StreamResponse decode(ByteBuf buf) {
        String streamId = Encoders.Strings.decode(buf);
        long byteCount = buf.readLong();
        return new StreamResponse(streamId, byteCount, null);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(byteCount, streamId, body());
    }

    @Override
    public boolean equals(Object other) {
        if (other instanceof StreamResponse) {
            StreamResponse o = (StreamResponse) other;
            return byteCount == o.byteCount && streamId.equals(o.streamId);
        }
        return false;
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(this).add("streamId", streamId).add("byteCount", byteCount)
                .add("body", body()).toString();
    }

}