Learning CakePHP2 from source code vol2
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This document discusses cross-cutting concerns in software development and how frameworks like CakePHP address them. It provides examples of common cross-cutting concerns like authentication, authorization, and logging. It then explains that CakePHP uses an event system to separate these cross-cutting concerns from the core application logic through attaching listeners and dispatching events. This allows concerns like auditing, performance logging, and exception handling to be handled in a unified way across the framework.
Learning CakePHP2 from source code vol2
- 1. LEARNING CAKEPHP FROM SOURCE CODE VOL.2 HIDESHI OGOSHI YNS PHILIPPINES INC. JUNE-8-2016
- 2. QUESTION Why do you use web framework instead of plain PHP? Separation of cross-cutting concern
- 3. SEPARATION OF CROSS-CUTTING CONCERN ▸ Cross-cutting concerns are aspects of a program that affect other concerns. These concerns often cannot be cleanly decomposed from the rest of the system in both the design and implementation, and can result in either scattering (code duplication), tangling (significant dependencies between systems), or both. ▸ Examples: authentication, authorization, caching, communication, configuration, exception management, logging, routing, and validation
- 4. CORE CONCERN AND CROSS-CUTTING CONCERN
- 5. ▸ Auditing ▸ There is an enterprise system which requires to record all the operations by the users for security. EXAMPLE OF CROSS-CUTTING CONCERN 1
- 6. ▸ Performance logging ▸ There is a system which requires the high performance in order to provide higher user experience to the users. EXAMPLE OF CROSS-CUTTING CONCERN 2
- 7. ▸ Exception handling ▸ There is a system which requires to handle the exceptions and write errors in a log file so that the system will be able to notify system administrators in real time through e-mail. EXAMPLE OF CROSS-CUTTING CONCERN 3
- 8. HOW TO USE EVENT SYSTEM IN CAKEPHP ▸ One of the way to separate cross-cutting concerns in CakePHP is event system. ▸ The way to handle events is just attach listeners and dispatch events. ▸ Example: http://martinbean.co.uk/blog/2013/11/22/ getting-to-grips-with-cakephps-events-system/
- 9. EVENT SYSTEM USED IN CAKEPHP FRAMEWORK ▸ Controller, Components and Model use the event system.
- 10. CLASS DIAGRAM OF CAKEPHP
- 11. SEQUENCE DIAGRAM OF CAKEPHP
Editor's Notes
- #6: The system saves records consist of user ID, operated date time, kind of operation and how the data was operated such as SQL statement.
- #7: Every time we find a performance problem, we need to examine how much the system is slow and which part of the system causes the problem.
- #8: Once the system administrators notice the problems, they will be able to fix it before many users are suffered from it and give up to use the system or complain to the system administrators.