The technical principles and performance analysis of the NANNING framework in the Java class library

The Nanning framework is an AOP (facing -faced programming) framework for Java libraries.It provides a convenient way to achieve the separation of cross -sectional attention, such as log records, transaction management, security, etc.This article will explore the technical principles and performance analysis of the NANNING framework. The technical principle of the Nanning framework is based on the dynamic agency mechanism of JDK.It uses the characteristics of Java's reflection mechanism and dynamic proxy to allow programs to create proxy objects during runtime in order to perform additional operations before or after calling the target object.This mechanism enables developers to modify the behavior of the program during runtime without modifying the source code. To use the Nanning framework, you first need to define a cut type.The cut surface contains additional operations required by the proxy object, such as log records and transaction management.Next, you need to associate with the configuration file or annotation to associate with the target class.The configuration file can be defined by xml or annotation.In the configuration file, you need to specify the corresponding cut point (that is, the method of the target object), so that the frame can correctly apply the logic of the cutting type to the method of the target object. When the program is running, the NANNING framework will detect the target method call and create a proxy object if necessary.The proxy object executes the logic defined in the cut surface before or or after the target method is called.In this way, developers can dynamically change the behavior of the program by adding or modifying the cutting type without having to modify the source code. In terms of performance, using the NANNNG framework may introduce additional overhead.Each method calls pass the agent object and perform additional operations.This may lead to decline in performance.However, in order to maximize the performance, the NANNING framework will use the cache mechanism as much as possible to avoid repeatedly creating proxy objects.In addition, the Nanning framework also supports the interceptor chain of the proxy object. Developers can minimize the impact on performance through appropriate configuration. In summary, the Nanning framework is an AOP framework based on dynamic proxy. Through the reflection mechanism and dynamic proxy characteristics, it allows dynamic modification of the program during runtime.Although the use of the NANNING framework may introduce some performance overhead, it can maximize performance through appropriate configuration and cache mechanism.