THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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kafka.common.MessageReader is a input argument of kafka-console-producer and we expect users can have their custom reader to produce custom records. Hence, MessageReader is a public interface and we should offer a java version to replace current scala code. Also, the new MessageReader should be placed at clients module. (kafka.common.MessageReader is in core module)
Public Interfaces
New org.apache.kafka.
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tools.RecordReader interface
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/** * Typical implementations of this interface convert data from an `InputStream` received via `readRecords` into a * iterator of `ProducerRecord` instance. Noted that the implementations to have a public nullary constructor. * * This is used by the `kafka.tools.ConsoleProducer`. */ public interface RecordReader extends Closeable, Configurable { /** * read byte array from input stream and then generate a iterator of producer record * @param inputStream of message. the implementation does not need to close the input stream. * @return a iterator of producer record. It should implement following rules. 1) the hasNext() method must be idempotent. * 2) the convert error should be thrown by next() method. */ Iterator<ProducerRecord<byte[], byte[]>> readRecords(InputStream); /** * Closes this reader. This method is invoked if the iterator from readRecords either has no more records or throws exception. */ default void close() {} } |
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