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Manual Reference Pages  -  REX::TRANSACTION (3)

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NAME

Rex::Transaction - Transaction support.

CONTENTS

DESCRIPTION

With this module you can define transactions and rollback scenarios on failure.

SYNOPSIS



 task "do-something", "server01", sub {
   transaction {
     on_rollback {
       rmdir "/tmp/mydata";
     };

     mkdir "/tmp/mydata";
     upload "files/myapp.tar.gz", "/tmp/mydata";
     run "cd /tmp/mydata; tar xzf myapp.tar.gz";
     if($? != 0) { die("Error extracting myapp.tar.gz"); }
   };
 };



EXPORTED FUNCTIONS

    transaction($codeRef)

Start a transaction for $codeRef. If $codeRef dies it will rollback the transaction.



 task "deploy", group => "frontend", sub {
    on_rollback {
      rmdir "...";
    };
    deploy "myapp.tar.gz";
 };
 
 task "restart_server", group => "frontend", sub {
    run "/etc/init.d/apache2 restart";
 };
 
 task "all", group => "frontend", sub {
    transaction {
      do_task [qw/deploy restart_server/];
    };
 };



    on_rollback($codeRef)

This code will be executed if one step in the transaction fails.

See transaction.

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perl v5.20.3 REX::TRANSACTION (3) 2016-03-07

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