Examples of com.netflix.zeno.fastblob.record.StreamingByteData

Package com.netflix.zeno.fastblob.record

Examples of com.netflix.zeno.fastblob.record.StreamingByteData

com.netflix.zeno.fastblob.record.StreamingByteData
This class buffers data from an InputStream. The buffered data can be accessed randomly within a predefined window before or after the greatest previously accessed byte index.
When using this class, some bytes before and after the maximum byte previously accessed are available via the get() method inherited from ByteData.
Specifically, 2^(log2OfBufferSegmentLength) bytes, both before and after the maximum byte previously accessed by either the stream's read() or ByteData's get() method are available.
This is useful when reading the FastBlob. Although records are pulled from the FastBlob stream one at a time, the FastBlobDeserializationRecord requires random access to the bytes in the record.
The FastBlobWriter records the ceil(log2(maxLength)) of the individual records contained in the FastBlob. Upon deserialization, this value is read and passed to the constructor of this class to set the buffer length. This guarantees that the reader can access the entire record while it is being read (because the maximum byte accessed while deserializing the record will at most be the last byte of the record). @author dkoszewnik

            arr[i] = (byte)i;
        }


        ByteArrayInputStream bais = new ByteArrayInputStream(arr);


        data = new StreamingByteData(bais, 4);
    }

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     * Read a snapshot from the specified stream.  Apply the snapshot to the FastBlobStateEngine supplied in the constructor of this class.
     */
    public void readSnapshot(InputStream is) throws IOException {
        FastBlobHeader header = readHeader(is);


        StreamingByteData byteData = getStreamingByteData(is, header.getDeserializationBufferSizeHint());
        DataInputStream dis = new DataInputStream(byteData);


        int numTypes = header.getNumberOfTypes();


        if(stateEngine.getLatestVersion() == null) {

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     * in the state which the server was in when it was produced this delta.  Otherwise, the results are undefined.
     */
    public void readDelta(InputStream is) throws IOException {
        FastBlobHeader header = readHeader(is);


        StreamingByteData byteData = getStreamingByteData(is, header.getDeserializationBufferSizeHint());
        DataInputStream dis = new DataInputStream(byteData);


        int numTypes = header.getNumberOfTypes();


        for(int i=0;i<numTypes;i++) {

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        stateEngine.addHeaderTags(header.getHeaderTags());
        return header;
    }


    private StreamingByteData getStreamingByteData(InputStream is, int deserializationBufferSizeHint) throws IOException {
        StreamingByteData byteData = new StreamingByteData(is, deserializationBufferSizeHint);
        return byteData;
    }

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     * Read a snapshot from the specified stream.  Apply the snapshot to the FastBlobStateEngine supplied in the constructor of this class.
     */
    public void readSnapshot(InputStream is) throws IOException {
        FastBlobHeader header = readHeader(is);


        StreamingByteData byteData = getStreamingByteData(is, header.getDeserializationBufferSizeHint());
        DataInputStream dis = new DataInputStream(byteData);


        int numTypes = header.getNumberOfTypes();


        if(stateEngine.getLatestVersion() == null) {

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        stateEngine.addHeaderTags(header.getHeaderTags());
        return header;
    }


    private StreamingByteData getStreamingByteData(InputStream is, int deserializationBufferSizeHint) throws IOException {
        StreamingByteData byteData = new StreamingByteData(is, deserializationBufferSizeHint);
        return byteData;
    }

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Related Classes of com.netflix.zeno.fastblob.record.StreamingByteData

com.netflix.zeno.fastblob.io.FastBlobReader

com.netflix.zeno.fastblob.lazy.LazyFastBlobReader

com.netflix.zeno.fastblob.state.StreamingByteDataTest

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