/ 
Kafka-0.800_2
/ Kafka::MockProtocol

NAME

Kafka::MockProtocol - functions to simulate the messages formation by the kafka server (in the Apache Kafka's Protocol).

VERSION

This documentation refers to Kafka::MockProtocol version 0.800_2 .

DESCRIPTION

This module is not a user module.

The main features of the Kafka::MockProtocol module are:

  • Supports parsing the Apache Kafka protocol to emulate the operations performed by the kafka server.

  • Supports Apache Kafka Requests and Responses (PRODUCE, FETCH, OFFSET, METADATA).

  • Support for working with 64 bit elements of the Kafka protocol on 32 bit systems.

FUNCTIONS

The following functions are available for Kafka::MockProtocol module.

decode_produce_request( $bin_stream_ref )

Decodes the argument and returns a reference to the hash representing the structure of the PRODUCE Request (examples see t/??_decode_encode.t).

This function take argument. The following argument is currently recognized:

$bin_stream_ref

$bin_stream_ref is a reference to the encoded Request buffer. The buffer must be a non-empty binary string.

encode_produce_response( $Produce_Response )

Encodes the argument and returns a reference to the encoded binary string representing a Response buffer.

This function take argument. The following argument is currently recognized:

$Produce_Response

$Produce_Response is a reference to the hash representing the structure of the PRODUCE Response (examples see t/??_decode_encode.t).

decode_fetch_request( $bin_stream_ref )

Decodes the argument and returns a reference to the hash representing the structure of the FETCH Request (examples see t/??_decode_encode.t).

This function take argument. The following argument is currently recognized:

$bin_stream_ref

$bin_stream_ref is a reference to the encoded Request buffer. The buffer must be a non-empty binary string.

encode_fetch_response( $Fetch_Response )

Encodes the argument and returns a reference to the encoded binary string representing a Response buffer.

This function take argument. The following argument is currently recognized:

$Fetch_Response

$Fetch_Response is a reference to the hash representing the structure of the FETCH Response (examples see t/??_decode_encode.t).

decode_offset_request( $bin_stream_ref )

Decodes the argument and returns a reference to the hash representing the structure of the OFFSET Request (examples see t/??_decode_encode.t).

This function take argument. The following argument is currently recognized:

$bin_stream_ref

$bin_stream_ref is a reference to the encoded Request buffer. The buffer must be a non-empty binary string.

encode_offset_response( $Produce_Response )

Encodes the argument and returns a reference to the encoded binary string representing a Response buffer.

This function take argument. The following argument is currently recognized:

$Offset_Response

$Offset_Response is a reference to the hash representing the structure of the OFFSET Response (examples see t/??_decode_encode.t).

decode_metadata_request( $bin_stream_ref )

Decodes the argument and returns a reference to the hash representing the structure of the METADATA Request (examples see t/??_decode_encode.t).

This function take argument. The following argument is currently recognized:

$bin_stream_ref

$bin_stream_ref is a reference to the encoded Request buffer. The buffer must be a non-empty binary string.

encode_metadata_response( $Metadata_Response )

Encodes the argument and returns a reference to the encoded binary string representing a Response buffer.

This function take argument. The following argument is currently recognized:

$Metadata_Response

$Metadata_Response is a reference to the hash representing the structure of the METADATA Response (examples see t/??_decode_encode.t).

Kafka::MockProtocol::last_errorcode()

This method returns an error code that specifies the description in the %Kafka::ERROR hash. Analysing this information can be done to determine the cause of the error.

Kafka::MockProtocol::last_error()

This method returns an error message that contains information about the encountered failure. Messages returned from this method may contain additional details and do not coincide completely with the %Kafka::ERROR hash.

DIAGNOSTICS

Error will set the non-zero value returned by "Kafka::MockProtocol::last_errorcode()" function.

Error messages are presented in the hash %Kafka::ERROR. You may experience the following errors:

$Kafka::ERROR_MISMATCH_ARGUMENT

This means that you didn't give the right argument to some of functions.

$Kafka::ERROR_REQUEST_OR_RESPONSE

This means that one of the fields of the request or response contains invalid data.

$Kafka::ERROR_NOT_BINARY_STRING

This means that one of the string fields of response does not contain a string or contains a string with Unicode data.

For more error description, always look at the message from the Kafka::MockProtocol::last_error() function.

SEE ALSO

The basic operation of the Kafka package modules:

Kafka - constants and messages used by the Kafka package modules.

Kafka::Connection - interface to connect to a Kafka cluster.

Kafka::Producer - interface for producing client.

Kafka::Consumer - interface for consuming client.

Kafka::Message - interface to access Kafka message properties.

Kafka::Int64 - functions to work with 64 bit elements of the protocol on 32 bit systems.

Kafka::Protocol - functions to process messages in the Apache Kafka's Protocol.

Kafka::IO - low level interface for communication with Kafka server.

Kafka::Internals - Internal constants and functions used by several package modules.

A wealth of detail about the Apache Kafka and the Kafka Protocol:

Main page at http://kafka.apache.org/

Kafka Protocol at https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol

AUTHOR

Sergey Gladkov, <sgladkov@trackingsoft.com>

CONTRIBUTORS

Alexander Solovey

Jeremy Jordan

Vlad Marchenko

COPYRIGHT AND LICENSE

Copyright (C) 2012-2013 by TrackingSoft LLC.

This package is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic at http://dev.perl.org/licenses/artistic.html.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.