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PHP client for IronWorker
PHP

Merge pull request #30 from alex-litvak/master

Check new ENV vars inside worker

README.md

iron_worker_php is PHP language binding for IronWorker.

IronWorker is a massively scalable background processing system. See How It Works

Getting Started

Get credentials

To start using iron_worker_php, you need to sign up and get an oauth token.

  1. Go to http://iron.io/ and sign up.
  2. Get an Oauth Token at http://hud.iron.io/tokens

Install iron_worker_php

There are two ways to use iron_worker_php:

Using precompiled phar archive:

Copy iron_worker.phar to target directory and include it:

<?php
require_once "phar://iron_worker.phar";

Please note, phar extension available by default only from php 5.3.0 For php 5.2 you should install phar manually or use second option.

Using classes directly

  1. Copy IronWorker.class.php to target directory
  2. Grab IronCore.class.php there and copy to target directory
  3. Include both of them:
<?php
require_once "IronCore.class.php";
require_once "IronWorker.class.php";

Using Composer

Follow instructions at https://packagist.org/

iron_worker package

Configure

Three ways to configure IronWorker:

  • Passing array with options:
<?php
$worker = new IronWorker(array(
    'token' => 'XXXXXXXXX',
    'project_id' => 'XXXXXXXXX'
));
  • Passing ini file name which stores your configuration options. Rename sample_config.ini to config.ini and include your Iron.io credentials (token and project_id):
<?php
$worker = new IronWorker('config.ini');
  • Automatic config search - pass zero arguments to constructor and library will try to find config file in following locations:

    • iron.ini in current directory
    • iron.json in current directory
    • IRON_WORKER_TOKEN, IRON_WORKER_PROJECT_ID and other environment variables
    • IRON_TOKEN, IRON_PROJECT_ID and other environment variables
    • .iron.ini in user's home directory
    • .iron.json in user's home directory

Creating a Worker

Here's an example worker:

<?php
echo "Hello PHP World!\n";

Upload code to server

Using CLI tool (preferred)

  • Get CLI tool
  • Download or create iron.json config file with project_id/password
  • Create HelloWorld.worker file, example:
runtime 'php'
exec 'HelloWorld.php'
  • Upload!
$ iron_worker upload HelloWorld

.worker syntax reference

Worker examples

You can find plenty of good worker examples here: iron_worker_examples

Queueing a Worker

<?php
$payload = array()
$options = array('label' => 'label_name', 'cluster' => 'dedicated')
$task_id = $worker->postTask('HelloWorld', $payload, $options);

queueing options

  • priority: The priority queue to run the task in. Valid values are 0, 1, and 2. 0 is the default.
  • timeout: The maximum runtime of your task in seconds. No task can exceed 3600 seconds (60 minutes). The default is 3600 but can be set to a shorter duration.
  • delay: The number of seconds to delay before actually queuing the task. Default is 0.
  • label: Optional text label for your task.
  • cluster: cluster name ex: "high-mem" or "dedicated". This is a premium feature for customers to have access to more powerful or custom built worker solutions. Dedicated worker clusters exist for users who want to reserve a set number of workers just for their queued tasks. If not set default is set to "default" which is the public IronWorker cluster.

Scheduling a Worker

postScheduleAdvanced($name, $payload, $start_at, $label = null, $run_every = null, $end_at = null, $run_times = null, $priority = null, $cluster = null)

If you want to run worker tasks in specific time intervals, once at a particular time, or n number of things starting at a specific time you should schedule it:

<?php
$options = array('label' => 'label_name', 'cluster' => 'default');
$task_id = $worker->postSchedule('HelloWorkerRuby', $options);

scheduling options

  • run_every: The amount of time, in seconds, between runs. By default, the task will only run once. run_every will return a 400 error if it is set to less than 60.
  • end_at: The time tasks will stop being queued. Should be a time or datetime.
  • run_times: The number of times a task will run.
  • priority: The priority queue to run the job in. Valid values are 0, 1, and 2. The default is 0. Higher values means
  • tasks spend less time in the queue once they come off the schedule.
  • start_at: The time the scheduled task should first be run.
  • label: Optional label for adding custom labels to scheduled tasks.
  • cluster: cluster name ex: "high-mem" or "dedicated". If not set default is set to "default" which is the public IronWorker cluster.

Status of a Worker

To get the status of a worker, you can use the getTaskDetails() method.

<?php
$task_id = $worker->postTask('HelloWorld');
$details = $worker->getTaskDetails($task_id);

echo $details->status; # prints 'queued', 'complete', 'error' etc.

Get Worker Log

Use any function that print text inside your worker to put messages to log.

<?php
$task_id = $worker->postTask('HelloWorld');
sleep(10);
$details = $worker->getTaskDetails($task_id);
# Check log only if task is finished.
if ($details->status != 'queued') {
    $log = $worker->getLog($task_id);
    echo $log; # prints "Hello PHP World!"
}

Loading the Task Data Payload

To provide Payload to your worker simply put an array with any content you want.

<?php
$payload = array(
    'key_one' => 'Helpful text',
    'key_two' => 2,
    'options' => array(
        'option 1',
        'option 2'
    )
);

$worker->postTask('HelloWorld', $payload);

$worker->postScheduleSimple('HelloWorld', $payload, 10)

$worker->postScheduleAdvanced('HelloWorld', $payload, time()+3*60, 2*60, null, 5);

When your code is executed, it will be passed four program arguments:

  • -id - The task id.
  • -payload - the filename containing the data payload for this particular task.
  • -d - the user writable directory that can be used while running your job.
  • -config - the filename containing config data (if available) for particular code.

IronWorker provide functions getArgs(), getPayload(), getConfig() in your worker to help you using payload:

<?php
$args = getArgs();

echo "Hello PHP World!\n";

print_r($args);

Setting Task Priority

You can specify priority of the task by setting the corresponding parameter.

$options = array('priority' => 1);
# Run task with medium priority
$worker->postTask('HelloWorld', $payload, $options);

Value of priority parameter means the priority queue to run the task in. Valid values are 0, 1, and 2. 0 is the default.

Setting progress status

To set current task progress, just call setProgress($percent, $message) inside your worker.

  • percent - A percentage value that can be set to show how much progress a task is making
  • msg - A human readable message string that can be used when showing the status of a task

To retrieve this data on client side, use $worker->getTaskDetails($task_id);

Troubleshooting

http error: 0

If you see Uncaught exception 'Http_Exception' with message 'http error: 0 | ' it most likely caused by misconfigured cURL https certificates. There are two ways to fix this error:

  1. Disable SSL certificate verification - add this line after IronWorker initialization: $worker->ssl_verifypeer = false;
  2. Switch to http protocol - add this to configuration options: protocol = http and port = 80
  3. Fix the error! Recommended solution: download actual certificates - cacert.pem and add them to php.ini:
[PHP]

curl.cainfo = "path\to\cacert.pem"

Full Documentation

You can find more documentation here:

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