#!/usr/bin/perl -w

use strict;
use warnings;
use autodie;
use diagnostics;

open my $read_log, '<', '/home/jay/test_output/tmp_app.log' or die $!;

my $pattern = 'mystring';
my @log_lines=<$read_log>;
my @all_lines_occurrences;
my @all_extracts;
my @unique_values;

   for(@log_lines){

        if ($_ =~ m/.*$pattern.*/) {
                push (@all_lines_occurrences, $_);
                #print $_ "\n";
        }
   }

for (@all_lines_occurrences) {
/^\d+\-\d+\-\d+ \d+:\d+:\d+\,\d+ \[(.*)\] .* \[(.*)\.(.*)\] .*\\n/;
      push (@all_extracts, $2);
#print "target type: $2 \n";
}

for(@all_extracts){
        print $_ "\n";
}

my @unique_values = do { my %seen; grep { !$seen{$_}++ } @all_extracts };

print "\n Unique values are:\n";
for (@unique_values) {
print $_ "\n";
}
close $read_log;