Page History

/**
 * ErrorHandlerContext interface
 */
public interface ErrorHandlerContext {

    /**
     * Return the topic name of the current input record; could be {@code null} 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 won't have an associated topic.
     * Another example is
     * {@link org.apache.kafka.streams.kstream.KTable#transformValues(ValueTransformerWithKeySupplier, String...)}
     * (and siblings), that do not always guarantee to provide a valid topic name, as they might be
     * executed "out-of-band" due to some internal optimizations applied by the Kafka Streams DSL.
     *
     * @return the topic name
     */
    String topic();

    /**
     * Return the partition id of the current input record; could be {@code -1} 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 won't have an associated partition id.
     * Another example is
     * {@link org.apache.kafka.streams.kstream.KTable#transformValues(ValueTransformerWithKeySupplier, String...)}
     * (and siblings), that do not always guarantee to provide a valid partition id, as they might be
     * executed "out-of-band" due to some internal optimizations applied by the Kafka Streams DSL.
     *
     * @return the partition id
     */
    int partition();

    /**
     * Return the offset of the current input record; could be {@code -1} 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 won't have an associated offset.
     * Another example is
     * {@link org.apache.kafka.streams.kstream.KTable#transformValues(ValueTransformerWithKeySupplier, String...)}
     * (and siblings), that do not always guarantee to provide a valid offset, as they might be
     * executed "out-of-band" due to some internal optimizations applied by the Kafka Streams DSL.
     *
     * @return the offset
     */
    long offset();

    /**
     * Return the headers of the current source 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 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 current processor node id.
     *
     * @return the processor node id
     */
    String processorNodeId();

    /**
     * Return the task id.
     *
     * @return the task id
     */
    TaskId taskId();
}