Guidelines for the use of framework in the Java class library when runtime

Guidelines for the use of framework in the Java class library when runtime Overview The runtime of life cycle is an important concept of the Java class library. It provides a mechanism to manage the life cycle of the Java object.When developing large applications, it is necessary to effectively manage the operation of the creation, initialization, destruction, and resource release of the object to avoid problems such as memory leakage and depletion of resources.The framework of the life cycle can simplify these operations and improve the maintenance of code and reused. Java provides a variety of frameworks and libraries, such as Spring, Quarkus, and Jakarta Ee (formerly known as Java Ee). These frameworks include support during the life cycle.Here are some guidelines and examples of the framework when using the life cycle. 1. The creation and initialization of the management object In the framework of the life cycle, it is usually marked by using the annotation to mark the object that needs to be managed.Below is an example of using the Spring framework: @Component public class MyObject { // ... @PostConstruct public void init() { // Initialize operation } // ... } In the above examples, the `@component` annotation marks an object that needs to be managed, and uses the`@postconstruct` annotation to define the initialization method of the object. 2. Destruction and resource release of management objects At the end of the life cycle of the object, resource release and cleaning operation may be required.This process can be simplified through the runtime of the life cycle.Here are an example of using the Spring framework: @Component public class MyObject { // ... @PreDestroy public void cleanup() { // Resource release and cleanup operation } // ... } In the above example, the `@predestroy` annotation defines the method that needs to be executed before the object is destroyed. 3. Execute other operations in the life cycle stage In the life cycle of the object, other operations may be required at a specific stage.The framework of the life cycle can be used to achieve this function by annotating.Here are an example of using the Quarkus framework: @Singleton public class MyObject { // ... @Inject public MyObject() { // Constructor } @PostConstruct public void init() { // Initialize operation } @PreDestroy public void cleanup() { // Resource release and cleanup operation } @Shutdown public void onShutdown() { // Operation executed when closed } // ... } The above example uses the method of `@shutdown` to define the method that needs to be executed when the application is closed. in conclusion The framework of the life cycle provides a mechanism that facilitates the life cycle of the Java object.By using the initialization, destruction and other life cycle operations of the annotation marker, the code can be simplified and the maintenance of the code can be improved.Whether using Spring, Quarkus, or Jakarta EE, you can get support for the life cycle. Please note that the code in the above example is only to demonstrate and explain how to use the framework when the life cycle is runtime, and it is not a complete running code.In practical applications, adjustments and expansion are needed according to the specific framework and needs. Reference materials: - Spring Framework Documentation: https://docs.spring.io/spring-framework/docs/current/spring-framework-reference/ - Quarkus Documentation: https://quarkus.io/guides/ - Jakarta EE Documentation: https://jakarta.ee/documentation/