Framework Definition:
- In a literal sense, it refers to the structure or skeleton that constitutes something.
- In the context of software, it refers to a semi-finished product that provides pre-built classes, interfaces, etc., to offer specific functionalities.
Advantages of Framework:
- Development is conducted according to predefined standards, ensuring the development productivity and quality of the resulting application.
- High-quality applications can be developed with assured maintainability and scalability after development.
18.1.1 Spring Framework
Spring Framework
- The Spring Framework (referred to as Spring) is an open-source framework for Java web application development.
- It is a lightweight framework compared to Enterprise Java Beans (EJB).
Container:
- A container is a runtime environment responsible for managing the lifecycle of various components within an application.
- Tomcat is referred to as a servlet container because, when Tomcat is running, it has complete control over tasks related to servlets such as creation, initialization, service execution, and destruction.
In the context of Spring:
- Spring is a container that manages various components (beans or class objects) used in an application.
- Spring manages the lifecycle of these beans, handling their creation, initialization, usage, and cleanup.
- Developers delegate the responsibility of managing these beans to Spring, ensuring a more organized and efficient application structure.
Spring's Characteristics
- Easier to learn and simpler than the (Enterprise Java Bean). Functions as a lightweight container.
- Use Inversion of Control (IoC) technology to control loose coupling between applications
- Supports DI(Dependency Injection) functionality
- Perform resource management using the AOP function
- Supports persistence and various related services
- What is persistence?
- Persistence refers to the ability of a system to store and retrieve data in a consistent and durable manner across different program executions or system failures. In the context of software development, persistence typically involves saving data from memory (volatile storage) into a more permanent form of storage, such as a database or a file system. - Supports interworking with numerous libraries
Terms
- Dependency Injection: A method where the framework creates and provides class objects in the code, instead of developers creating them manually.
- Inversion of Control (IOC): A method where the framework creates and provides class objects in the code, instead of developers creating them manually.
- Aspect Oriented Programming: A technique that increases modularity by separating core functionalities from additional functions, which are implemented separately. This allows you to focus on the core logic while managing cross-cutting concerns in a modular way.
Spring's Main Functions
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