Repository: apache/kafka
File: streams/src/main/java/org/apache/kafka/streams/processor/RecordContext.java (Java)

Code before:
     * @return the timestamp
     */
    long timestamp();

    /**
     * Return the headers of the current input record; could be an empty header if it is not
     * available.
     *
     * <p> For example, if this method is invoked within a {@link Punctuator#punctuate(long)
     * punctuation callback}, or while processing a record that was forwarded by a punctuation
     * callback, the record might not have any associated headers.
     * Another example is
     * {@link org.apache.kafka.streams.kstream.KTable#transformValues(ValueTransformerWithKeySupplier, String...)}
     * (and siblings), that do not always guarantee to provide a valid headers, as they might be
     * executed "out-of-band" due to some internal optimizations applied by the Kafka Streams DSL.
     *
     * @return the headers
     */
    Headers headers();

    /**
     * Return the non-deserialized byte[] of the input message key if the context has been triggered by a message.
     *
     * <p> If this method is invoked within a {@link Punctuator#punctuate(long)
     * punctuation callback}, or while processing a record that was forwarded by a punctuation
     * callback, it will return null.
     *
     * <p> If this method is invoked in a sub-topology due to a repartition, the returned key would be one sent
     * to the repartition topic.
     *
     * <p> Always returns null if this method is invoked within a
     * ProductionExceptionHandler.handle(ErrorHandlerContext, ProducerRecord, Exception)
     *
     * @return the raw byte of the key of the source message
     */
    byte[] sourceRawKey();

    /**
     * Return the non-deserialized byte[] of the input message value if the context has been triggered by a message.
     *
     * <p> If this method is invoked within a {@link Punctuator#punctuate(long)
     * punctuation callback}, or while processing a record that was forwarded by a punctuation
     * callback, it will return null.
     *
     * <p> If this method is invoked in a sub-topology due to a repartition, the returned key would be one sent
     * to the repartition topic.
     *
     * <p> Always returns null if this method is invoked within a
     * ProductionExceptionHandler.handle(ErrorHandlerContext, ProducerRecord, Exception)
     *
     * @return the raw byte of the value of the source message

Review comment (suggestion):
nit:
```suggestion
     * callback, it will return {@code null}.
```

Code after:
     * @return the timestamp
     */
    long timestamp();

    /**
     * Return the headers of the current input record; could be an empty header if it is not
     * available.
     *
     * <p> For example, if this method is invoked within a {@link Punctuator#punctuate(long)
     * punctuation callback}, or while processing a record that was forwarded by a punctuation
     * callback, the record might not have any associated headers.
     * Another example is
     * {@link org.apache.kafka.streams.kstream.KTable#transformValues(ValueTransformerWithKeySupplier, String...)}
     * (and siblings), that do not always guarantee to provide a valid headers, as they might be
     * executed "out-of-band" due to some internal optimizations applied by the Kafka Streams DSL.
     *
     * @return the headers
     */
    Headers headers();

    /**
     * Return the non-deserialized byte[] of the input message key if the context has been triggered by a message.
     *
     * <p> If this method is invoked within a {@link Punctuator#punctuate(long)
     * punctuation callback}, or while processing a record that was forwarded by a punctuation
     * callback, it will return {@code null}.
     *
     * <p> If this method is invoked in a sub-topology due to a repartition, the returned key would be one sent
     * to the repartition topic.
     *
     * @return the raw byte of the key of the source message
     */
    byte[] sourceRawKey();

    /**
     * Return the non-deserialized byte[] of the input message value if the context has been triggered by a message.
     *
     * <p> If this method is invoked within a {@link Punctuator#punctuate(long)
     * punctuation callback}, or while processing a record that was forwarded by a punctuation
     * callback, it will return {@code null}.
     *
     * <p> If this method is invoked in a sub-topology due to a repartition, the returned key would be one sent
     * to the repartition topic.
     *
     * @return the raw byte of the value of the source message
     */
    byte[] sourceRawValue();
}