using components in Cakephp 2+ Shell

Question

I am trying to implement a task using the cakephp shell for my application. The task involves running a long running process (hence the need to use the shell).

The function requires me to use a function inside a Component called CommonComponent

Unfortunately whenever i try to include the component i get the following error PHP Fatal error: Class 'Component' not found in /var/www/nginx-test/app/Controller/Component/CommonComponent.php

Here is the CronShell Class which is being called

class CronShell extends AppShell {
   public function main() {
        $this->out('Hello world.');      
//  $this->out(phpinfo());
    }
     public function test()
    {
         $this->out('Before Import'); 
        App::import('Component', 'Common');
        $this->out('Import complete');
        // $this->Common=ClassRegistry::init('CommonComponent');
        $this->Common =new CommonComponent();
        $this->out('Initialization complete');
        $this->Common->testCron();
         $this->out('FunctionCall complete');
        //$this->Common->saveCacheEntry("name","value");
    }
    }

The CommonComponent class is stored as app/Controller/Component/CommonComponent.php and is as follows

 class CommonComponent extends Component
{
 function testCron()
    {    
     $this->out('Hello world from Component.');
    }
 }

Any ideas?

Answer 1

I had to do this recently with MTurk component I wrote. My final solution was using a lib instead of a component. Then I had the component access the lib so I could use the methods from both a component and from shell.

However, here is code that WILL allow you to load a component from a shell.

<?php
App::uses('AppShell', 'Console/Command');
App::uses('ComponentCollection', 'Controller');
App::uses('Controller', 'Controller');
App::uses('MTurkComponent', 'Controller/Component');

class ProcessCompletedTask extends Shell {
    public function execute() {
        $this->out("Processing...\n");
        $collection = new ComponentCollection();
        $this->MTurk = new MTurkComponent($collection);
        $controller = new Controller();
        $this->MTurk->initialize($controller);

        $this->MTurk->processHITs();
        $this->out("Complete\n");
    }
}

Answer 2

What you import into the Shell should be code from within your Apps Lib

the component can also make use of the Lib code - but you'll not need to do a load of tedious stuff if you set it up right you'll make you app cleaner

if you import the component you'll need to pass it a component collection and so you'd have to make that from witin shell not that your use it (or if you do you must be doing it wrong)