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Zend Framework: Zend_Commons Component Proposal

Table of Contents

1. Overview

Zend_Commons is a collection of object-oriented strategies wrapping most common algorithms and operations. The biggest problem with existing PHP functions like fopen(), file_get_contents(), shell_exec(), etc. is that they are not object-oriented and are a huge legacy from PHP4. Zend_Commons resolves this problem by means of an extendable collection of classes designed in a Strategy pattern.

Moreover, this approach is very helpful during unit testing, when sensitive I/O, system, HTTP, etc. operations shall be properly isolated and mocked. When every operation is presented as an object retrieved from a factory - we can control their behavior to the very last detail.

I can't imagine right now all possible algorithms we may wrap in Zend_Commons. The idea is to create a factory of reusable components, which can be extended later by other contributors.

2. References

• apache commons

3. Component Requirements, Constraints, and Acceptance Criteria

• This component will implement algorithms and operations.
• This component will include a unified entry point.
• This component will allow customization.

4. Dependencies on Other Framework Components

• Zend_Exception
• Zend_Log
• Zend_Loader_PluginLoader

5. Theory of Operation

One of the strategies is instantiated via factory method, configured, and executed. Every strategy is a plugin, loaded with Zend_Loader_Plugin.

6. Milestones / Tasks

• Milestone 1: Design notes will be published
• Milestone 2: Working prototype checked into the incubator
• Milestone 3: Unit tests exist, work, and are checked into SVN.
• Milestone 4: Initial documentation exists.

7. Class Index

• Zend_Commons
  • Zend_Commons_Exception
  • Zend_Commons_Abstract
  • Zend_Commons_Listener
  • Zend_Commons_Event
    • Zend_Commons_Io_Read
    • Zend_Commons_Io_Write
    • Zend_Commons_Io_Delete
    • Zend_Commons_Io_Mkdir
    • Zend_Commons_Io_Chmod
  • Zend_Commons_Exec
  • Zend_Commons_Email
  • Zend_Commons_Http
• more later...

8. Use Cases

9. Class Skeletons