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#!/usr/bin/perl |
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|
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use warnings; |
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use strict; |
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|
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# --------------------------------------------------------------- |
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# just using POE itself and the DBIAgent-component as a query-agent (QA) |
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use POE qw( Component::DBIAgent ); |
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# for debugging ... |
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use Carp; |
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use Data::Dumper; |
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|
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|
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# --------------------------------------------------------------- |
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sub make_queries { |
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## makes a hash from sql-query-strings |
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## which will be passed to the query-agent later |
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my $queries = { |
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read_message => 'SELECT * FROM pdmsg WHERE state IS NULL', |
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update_one_account => 'update hits_due set hits = hits + ? where acctid = ?', |
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}; |
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return $queries; |
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} |
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|
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|
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# --------------------------------------------------------------- |
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sub got_row { |
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## This state gets called once for every row returned |
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## from the query read_hits_due, and then once |
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## with $_[ARG0] containing the string 'EOF'. |
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|
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#carp("============= got result", "\n"); |
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|
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my ( $kernel, $self, $heap, $row ) = @_[ KERNEL, OBJECT, HEAP, ARG0 ]; |
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|
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if ( $row ne 'EOF' ) { |
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# PROCESS A ROW |
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print "------------------ got row", "\n"; |
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print Dumper($row); |
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} else { |
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# NO MORE ROWS |
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print "--- no more rows", "\n"; |
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# let the kernel run for two/three timeslices ... |
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#$kernel->run_one_timeslice(); |
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#$kernel->run_one_timeslice(); |
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#$kernel->run_one_timeslice(); |
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# ... before stopping it by sending an "IDLE"-signal |
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# does it do with "IDLE"? |
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#$kernel->signal($kernel, "IDLE"); |
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# do we need to TERM? |
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#$kernel->signal($kernel, "TERM"); |
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} |
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} |
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|
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|
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# --------------------------------------------------------------- |
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sub got_error { |
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my ( $kernel, $heap, $errmsg ) = @_[ KERNEL, HEAP, ARG0 ]; |
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print "$0 got error:", "\n", $errmsg, "\n"; |
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$kernel->signal($kernel, "TERM"); |
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} |
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|
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|
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# --------------------------------------------------------------- |
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sub _start { |
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my ( $kernel, $session, $heap ) = @_[ KERNEL, HEAP ]; |
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|
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# setting up the query-agent |
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$heap->{helper} = POE::Component::DBIAgent->new( |
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DSN => [ 'dbi:mysql:topscores:host=192.168.10.51', |
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"root", |
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"" |
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], |
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Count => 1, # how many agents to start |
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Queries => make_queries(), # the "queries"-hash |
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Debug => 1, # turn debugging on/off |
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); |
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|
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# reference to session which will recieve results |
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#my $sess = $kernel->get_active_session(); |
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|
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# start query-agent |
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$heap->{helper}->setErrorHandler( |
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$session => 'got_error' |
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); |
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$heap->{helper}->query( |
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read_message # the named query to execute |
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=> $session => 'got_row' # the session and state to send results to |
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# and any parameters would go here. |
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); |
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|
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} |
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|
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# --------------------------------------------------------------- |
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sub _stop { |
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my ( $kernel, $heap ) = @_[ KERNEL, HEAP ]; |
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print "$0 stopped", "\n"; |
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} |
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|
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|
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# --------------------------------------------------------------- |
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# the handlers for starting, stopping |
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# and getting valid or invalid responses (errors) |
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my @handlers = qw( |
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_start |
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_stop |
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got_row |
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got_error |
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); |
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# the main session for the query-agent |
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POE::Session->create( |
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package_states => [ main => \@handlers ], |
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); |
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|
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|
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# --------------------------------------------------------------- |
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# start the kernel |
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$poe_kernel->run(); |
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exit; |
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