com.webpieces.http2parser.impl.WindowUpdateMarshaller Maven / Gradle / Ivy

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A re-usable asynchronous http2 parser

There is a newer version: 2.1.1

package com.webpieces.http2parser.impl;

import com.webpieces.http2parser.api.dto.Http2Frame;
import com.webpieces.http2parser.api.dto.Http2WindowUpdate;
import org.webpieces.data.api.BufferPool;
import org.webpieces.data.api.DataWrapper;
import org.webpieces.data.api.DataWrapperGenerator;

import java.nio.ByteBuffer;
import java.util.Optional;

public class WindowUpdateMarshaller extends FrameMarshallerImpl {

    WindowUpdateMarshaller(BufferPool bufferPool, DataWrapperGenerator dataGen) {
        super(bufferPool, dataGen);
    }

    public byte marshalFlags(Http2Frame frame) {
        return 0x0;
    }

    public DataWrapper marshalPayload(Http2Frame frame) {
        Http2WindowUpdate castFrame = (Http2WindowUpdate) frame;

        ByteBuffer payload = bufferPool.nextBuffer(4).putInt(castFrame.getWindowSizeIncrement());
        payload.flip();

        return dataGen.wrapByteBuffer(payload);
    }

    public void unmarshalFlagsAndPayload(Http2Frame frame, byte flags, Optional maybePayload) {
        Http2WindowUpdate castFrame = (Http2WindowUpdate) frame;
        maybePayload.ifPresent(payload -> {
            ByteBuffer payloadByteBuffer = bufferPool.createWithDataWrapper(payload);

            castFrame.setWindowSizeIncrement(payloadByteBuffer.getInt());
            bufferPool.releaseBuffer(payloadByteBuffer);

        });
    }
}