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package Kafka::Producer; |
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=head1 NAME |
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Kafka::Producer - Perl interface for Kafka producer client. |
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=head1 VERSION |
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This documentation refers to C version 1.06 . |
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=cut |
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use 5.010; |
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use strict; |
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use warnings; |
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our $VERSION = '1.06'; |
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use Carp; |
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use Params::Util qw( |
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_ARRAY |
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_INSTANCE |
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_NONNEGINT |
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_NUMBER |
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_STRING |
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); |
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use Scalar::Util qw( |
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blessed |
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); |
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use Scalar::Util::Numeric qw( |
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isint |
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); |
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use Kafka qw( |
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%ERROR |
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$COMPRESSION_GZIP |
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$COMPRESSION_NONE |
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$COMPRESSION_SNAPPY |
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$ERROR_CANNOT_GET_METADATA |
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$ERROR_MISMATCH_ARGUMENT |
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$REQUEST_TIMEOUT |
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$NOT_SEND_ANY_RESPONSE |
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$WAIT_WRITTEN_TO_LOCAL_LOG |
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$BLOCK_UNTIL_IS_COMMITTED |
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); |
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use Kafka::Connection; |
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use Kafka::Exceptions; |
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use Kafka::Internals qw( |
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$APIKEY_PRODUCE |
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$MAX_CORRELATIONID |
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$MAX_INT16 |
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$MAX_INT32 |
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$PRODUCER_ANY_OFFSET |
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_get_CorrelationId |
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format_message |
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=head1 SYNOPSIS |
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use 5.010; |
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use strict; |
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use warnings; |
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use Scalar::Util qw( |
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blessed |
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); |
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use Try::Tiny; |
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use Kafka::Connection; |
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use Kafka::Producer; |
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my ( $connection, $producer ); |
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try { |
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#-- Connection |
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$connection = Kafka::Connection->new( host => 'localhost' ); |
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86
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#-- Producer |
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$producer = Kafka::Producer->new( Connection => $connection ); |
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# Sending a single message |
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my $response = $producer->send( |
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'mytopic', # topic |
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0, # partition |
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'Single message' # message |
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); |
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# Sending a series of messages |
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$response = $producer->send( |
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'mytopic', # topic |
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0, # partition |
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[ # messages |
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'The first message', |
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'The second message', |
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'The third message', |
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] |
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); |
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107
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} catch { |
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my $error = $_; |
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if ( blessed( $error ) && $error->isa( 'Kafka::Exception' ) ) { |
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warn 'Error: (', $error->code, ') ', $error->message, "\n"; |
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exit; |
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} else { |
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die $error; |
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} |
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}; |
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117
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# Closes the producer and cleans up |
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undef $producer; |
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$connection->close; |
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undef $connection; |
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122
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=head1 DESCRIPTION |
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124
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Kafka producer API is implemented by C class. |
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126
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The main features of the C class are: |
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128
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=over 3 |
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130
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=item * |
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132
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Provides object-oriented API for producing messages. |
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134
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=item * |
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136
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Provides Kafka PRODUCE requests. |
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138
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=back |
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140
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=cut |
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142
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my %known_compression_codecs = map { $_ => 1 } ( |
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$COMPRESSION_NONE, |
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$COMPRESSION_GZIP, |
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$COMPRESSION_SNAPPY, |
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); |
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148
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#-- constructor ---------------------------------------------------------------- |
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150
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=head2 CONSTRUCTOR |
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152
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=head3 C |
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154
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Creates new producer client object. |
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156
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C takes arguments in key-value pairs. The following arguments are currently recognized: |
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158
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=over 3 |
159
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160
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=item C $connection> |
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162
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C<$connection> is the L object responsible for communication with |
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the Apache Kafka cluster. |
164
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165
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=item C $client_id> |
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167
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This is a user supplied identifier (string) for the client application. |
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169
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If C is not passed to constructor, its value will be automatically assigned |
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(to string C<'producer'>). |
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172
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=item C $acks> |
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174
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The C<$acks> should be an int16 signed integer. |
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176
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Indicates how many acknowledgements the servers should receive before responding to the request. |
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178
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If it is C<$NOT_SEND_ANY_RESPONSE> the server does not send any response. |
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If it is C<$WAIT_WRITTEN_TO_LOCAL_LOG>, (default) |
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the server will wait until the data is written to the local log before sending a response. |
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183
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If it is C<$BLOCK_UNTIL_IS_COMMITTED> |
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the server will block until the message is committed by all in sync replicas before sending a response. |
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186
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C<$NOT_SEND_ANY_RESPONSE>, C<$WAIT_WRITTEN_TO_LOCAL_LOG>, C<$BLOCK_UNTIL_IS_COMMITTED> |
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can be imported from the L module. |
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189
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=item C $timeout> |
190
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191
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This provides a maximum time the server can await the receipt |
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of the number of acknowledgements in C. |
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194
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The C<$timeout> in seconds, could be any integer or floating-point type not bigger than int32 positive integer. |
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196
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Optional, default = C<$REQUEST_TIMEOUT>. |
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198
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C<$REQUEST_TIMEOUT> is the default timeout that can be imported from the |
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L module. |
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201
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=back |
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203
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=cut |
204
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sub new { |
205
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108
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108
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1
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154309
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my ( $class, %p ) = @_; |
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207
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108
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442
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my $self = bless { |
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Connection => undef, |
209
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ClientId => undef, |
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RequiredAcks => $WAIT_WRITTEN_TO_LOCAL_LOG, |
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Timeout => $REQUEST_TIMEOUT, |
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}, $class; |
213
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214
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108
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66
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847
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exists $p{$_} and $self->{$_} = $p{$_} foreach keys %$self; |
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216
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108
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100
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467
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$self->{ClientId} //= 'producer'; |
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218
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$self->_error( $ERROR_MISMATCH_ARGUMENT, 'Connection' ) |
219
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108
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100
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806
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unless _INSTANCE( $self->{Connection}, 'Kafka::Connection' ); |
220
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$self->_error( $ERROR_MISMATCH_ARGUMENT, 'ClientId' ) |
221
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66
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683
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unless ( $self->{ClientId} eq '' || defined( _STRING( $self->{ClientId} ) ) ) && !utf8::is_utf8( $self->{ClientId} ); |
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100
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222
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$self->_error( $ERROR_MISMATCH_ARGUMENT, format_message( 'Timeout (%s)', $self->{Timeout} ) ) |
223
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80
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50
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66
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545
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unless defined _NUMBER( $self->{Timeout} ) && int( $self->{Timeout} * 1000 ) >= 1 && int( $self->{Timeout} * 1000 ) <= $MAX_INT32; |
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66
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224
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225
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70
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130
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my $required_acks = $self->{RequiredAcks}; |
226
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70
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100
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66
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610
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$self->_error( $ERROR_MISMATCH_ARGUMENT, 'RequiredAcks' ) |
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66
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100
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227
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unless |
228
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defined( $required_acks ) |
229
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&& isint( $required_acks ) |
230
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&& ( |
231
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$required_acks == $NOT_SEND_ANY_RESPONSE |
232
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|| $required_acks == $WAIT_WRITTEN_TO_LOCAL_LOG |
233
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|| $required_acks == $BLOCK_UNTIL_IS_COMMITTED |
234
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) |
235
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; |
236
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237
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60
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327
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return $self; |
238
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} |
239
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240
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#-- public attributes ---------------------------------------------------------- |
241
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242
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=head2 METHODS |
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244
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The following methods are defined for the C class: |
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246
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=cut |
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248
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#-- public methods ------------------------------------------------------------- |
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250
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=head3 C |
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252
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Sends a messages on a L object. |
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254
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Returns a non-blank value (a reference to a hash with server response description) |
255
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if the message is successfully sent. |
256
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257
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C takes the following arguments: |
258
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259
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=over 3 |
260
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261
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=item C<$topic> |
262
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263
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The C<$topic> must be a normal non-false string of non-zero length. |
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265
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=item C<$partition> |
266
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267
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The C<$partition> must be a non-negative integer. |
268
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269
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=item C<$messages> |
270
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271
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The C<$messages> is an arbitrary amount of data (a simple data string or |
272
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a reference to an array of the data strings). |
273
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274
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=item C<$keys> |
275
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276
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The C<$keys> are optional message keys, for partitioning with each message, |
277
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so the consumer knows the partitioning key. |
278
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This argument should be either a single string (common key for all messages), |
279
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or an array of strings with length matching messages array. |
280
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281
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=item C<$compression_codec> |
282
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283
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Optional. |
284
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285
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C<$compression_codec> sets the required type of C<$messages> compression, |
286
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if the compression is desirable. |
287
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288
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Supported codecs: |
289
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C<$COMPRESSION_NONE>, |
290
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C<$COMPRESSION_GZIP>, |
291
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C<$COMPRESSION_SNAPPY>. |
292
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|
The defaults that can be imported from the L module. |
293
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294
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|
Do not use C<$Kafka::SEND_MAX_ATTEMPTS> in Csend> request to prevent duplicates. |
295
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296
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|
=back |
297
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298
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|
|
=cut |
299
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|
|
sub send { |
300
|
5070
|
|
|
5070
|
1
|
111065
|
my ( $self, $topic, $partition, $messages, $keys, $compression_codec ) = @_; |
301
|
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|
302
|
5070
|
100
|
66
|
|
|
32870
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, 'topic' ) |
|
|
|
66
|
|
|
|
|
|
|
|
100
|
|
|
|
|
303
|
|
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|
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|
|
unless defined( $topic ) && ( $topic eq '' || defined( _STRING( $topic ) ) ) && !utf8::is_utf8( $topic ); |
304
|
5062
|
100
|
66
|
|
|
24690
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, 'partition' ) |
|
|
|
66
|
|
|
|
|
305
|
|
|
|
|
|
|
unless defined( $partition ) && isint( $partition ) && $partition >= 0; |
306
|
5052
|
100
|
100
|
|
|
20360
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, 'messages' ) |
307
|
|
|
|
|
|
|
unless defined( _STRING( $messages ) ) || _ARRAY( $messages ); |
308
|
5047
|
100
|
100
|
|
|
9786
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, 'keys' ) |
|
|
|
66
|
|
|
|
|
309
|
|
|
|
|
|
|
unless ( !defined $keys || defined( _STRING( $keys ) ) || _ARRAY( $keys ) ); |
310
|
|
|
|
|
|
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, 'compression_codec' ) |
311
|
5041
|
100
|
100
|
|
|
8131
|
unless ( !defined( $compression_codec ) || $known_compression_codecs{ $compression_codec } ); |
312
|
|
|
|
|
|
|
|
313
|
5029
|
100
|
|
|
|
10559
|
$messages = [ $messages ] unless ref( $messages ); |
314
|
5029
|
|
|
|
|
7295
|
foreach my $message ( @$messages ) { |
315
|
10042
|
100
|
66
|
|
|
49789
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, format_message( 'message = %s', $message ) ) |
|
|
|
100
|
|
|
|
|
316
|
|
|
|
|
|
|
unless defined( $message ) && ( $message eq '' || ( defined( _STRING( $message ) ) && !utf8::is_utf8( $message ) ) ); |
317
|
|
|
|
|
|
|
} |
318
|
|
|
|
|
|
|
|
319
|
5020
|
|
|
|
|
6430
|
my $common_key; |
320
|
|
|
|
|
|
|
|
321
|
5020
|
50
|
|
|
|
11025
|
if( _ARRAY( $keys ) ) { |
|
|
100
|
|
|
|
|
|
322
|
|
|
|
|
|
|
# ensure that keys array maytches messages array |
323
|
0
|
0
|
|
|
|
0
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, 'keys' ) |
324
|
|
|
|
|
|
|
unless scalar( @$keys ) == scalar( @$messages ); |
325
|
|
|
|
|
|
|
|
326
|
0
|
|
|
|
|
0
|
foreach my $key ( @$keys ) { |
327
|
0
|
0
|
0
|
|
|
0
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, format_message( 'key = %s', $key ) ) |
|
|
|
0
|
|
|
|
|
|
|
|
0
|
|
|
|
|
328
|
|
|
|
|
|
|
unless !defined( $key ) || $key eq '' || ( defined( _STRING( $key ) ) && !utf8::is_utf8( $key ) ); |
329
|
|
|
|
|
|
|
} |
330
|
|
|
|
|
|
|
} |
331
|
|
|
|
|
|
|
elsif( defined $keys ) { |
332
|
1
|
50
|
33
|
|
|
12
|
$self->_error( $ERROR_MISMATCH_ARGUMENT, format_message( 'key = %s', $keys ) ) |
|
|
|
33
|
|
|
|
|
333
|
|
|
|
|
|
|
unless $keys eq '' || ( defined( _STRING( $keys ) ) && !utf8::is_utf8( $keys ) ); |
334
|
0
|
|
|
|
|
0
|
$common_key = $keys; |
335
|
|
|
|
|
|
|
} |
336
|
|
|
|
|
|
|
else { |
337
|
5019
|
|
|
|
|
6635
|
$common_key = ''; |
338
|
|
|
|
|
|
|
} |
339
|
|
|
|
|
|
|
|
340
|
5019
|
|
|
|
|
6539
|
my $MessageSet = []; |
341
|
|
|
|
|
|
|
my $request = { |
342
|
|
|
|
|
|
|
ApiKey => $APIKEY_PRODUCE, |
343
|
|
|
|
|
|
|
CorrelationId => _get_CorrelationId(), |
344
|
|
|
|
|
|
|
ClientId => $self->{ClientId}, |
345
|
|
|
|
|
|
|
RequiredAcks => $self->{RequiredAcks}, |
346
|
5019
|
|
|
|
|
11426
|
Timeout => int( $self->{Timeout} * 1000 ), |
347
|
|
|
|
|
|
|
topics => [ |
348
|
|
|
|
|
|
|
{ |
349
|
|
|
|
|
|
|
TopicName => $topic, |
350
|
|
|
|
|
|
|
partitions => [ |
351
|
|
|
|
|
|
|
{ |
352
|
|
|
|
|
|
|
Partition => $partition, |
353
|
|
|
|
|
|
|
MessageSet => $MessageSet, |
354
|
|
|
|
|
|
|
}, |
355
|
|
|
|
|
|
|
], |
356
|
|
|
|
|
|
|
}, |
357
|
|
|
|
|
|
|
], |
358
|
|
|
|
|
|
|
}; |
359
|
|
|
|
|
|
|
|
360
|
5019
|
|
|
|
|
8547
|
my $key_index = 0; |
361
|
5019
|
|
|
|
|
7226
|
foreach my $message ( @$messages ) { |
362
|
10032
|
50
|
0
|
|
|
24782
|
push @$MessageSet, { |
363
|
|
|
|
|
|
|
Offset => $PRODUCER_ANY_OFFSET, |
364
|
|
|
|
|
|
|
Key => defined $common_key ? $common_key : ( $keys->[ $key_index ] // '' ), |
365
|
|
|
|
|
|
|
Value => $message, |
366
|
|
|
|
|
|
|
}; |
367
|
10032
|
|
|
|
|
14211
|
++$key_index; |
368
|
|
|
|
|
|
|
} |
369
|
|
|
|
|
|
|
|
370
|
5019
|
|
|
|
|
13905
|
my $result = $self->{Connection}->receive_response_to_request( $request, $compression_codec, $self->{Timeout} ); |
371
|
5017
|
|
|
|
|
35275
|
return $result; |
372
|
|
|
|
|
|
|
} |
373
|
|
|
|
|
|
|
|
374
|
|
|
|
|
|
|
#-- private attributes --------------------------------------------------------- |
375
|
|
|
|
|
|
|
|
376
|
|
|
|
|
|
|
#-- private methods ------------------------------------------------------------ |
377
|
|
|
|
|
|
|
|
378
|
|
|
|
|
|
|
# Handler for errors |
379
|
|
|
|
|
|
|
sub _error { |
380
|
99
|
|
|
99
|
|
152
|
my $self = shift; |
381
|
|
|
|
|
|
|
|
382
|
99
|
|
|
|
|
288
|
Kafka::Exception::Producer->throw( throw_args( @_ ) ); |
383
|
|
|
|
|
|
|
|
384
|
0
|
|
|
|
|
|
return; |
385
|
|
|
|
|
|
|
} |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
|
388
|
|
|
|
|
|
|
|
389
|
|
|
|
|
|
|
1; |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
__END__ |