When we learn spring, we know that spring has two main ideas, one is the IOC, the other is AOP, and for IOC, dependency injection doesn't have to be said, and for spring's core AOP, we not only need to know how to satisfy our function through AOP,
Using the Abstractroutingdatasource implementation provided by springCreate the Abstractroutingdatasource implementation class, which is responsible for saving all data sources and switching data source policies:public class Dynamicdatasource
1. Java Memory modelThe Java Virtual machine divides the memory it manages into several data regions as it executes the program, as shown in the distribution of these data regions:
Program counter: A small area of memory that points to the
First, prefaceOn the network to see a blog spring implementation of AOP 4 ways, bloggers write very easy to understand, but the layout is really crazy, for me so a typesetting, code format obsessive-Compulsive disorder, really Can't stand it ~ ~ ~ ~
Although Java does not have the dynamic language like the violence, but still days, water to produce many framework technology---reflection (reflection), generics (generics), meta-data (annotation), proxies (proxy/cglib), Code dynamic Generation (
Aspect-oriented programming, AOP, is a programming technique that allows programmers to modularize the behavior of crosscutting concerns or crosscutting typical lines of responsibility, such as logging and transaction management. The core structure
Dynamic proxy ClassesThe Java dynamic proxy class is located under the Java.lang.reflect package, which generally involves the following two classes: 1.Interface InvocationhandlerOnly one method is defined in the interface:Object Invoke (Object
The proxy mode provides a proxy for other objects to control access to this object. In some cases, a client does not want or cannot directly reference another object, and the proxy object can play a mediation role between the client and the target
Because the most recent service item provides an interface with a requirement, all operations must check that the operation of the service is available, so the sense that AOP is particularly suitable for implementation. A small example of
Java 1.3 introduces a new feature named "Dynamic Proxy Class", which can be used to dynamically create wrapper Classes for "implementations of known interfaces. Before the advent of version 1.3, when I first heard of the dynamic proxy class I was
I. Preface
AOP (Aspect Oriented Programing)-it is mainly used for log recording, performance analysis, security control, transaction processing, Exception Processing, and so on.
AOP mainly uses JDK reflection and dynamic proxy. The AOP proxy is
AOP is a technology that separates general logic from specific services. It can make up for the problem of insufficient horizontal code reuse of OO and implement separation of concerns (SoC) Well ). Cache is a common technology used to improve
[Java] Spring AOP basic knowledge-dynamic proxySpring AOP uses dynamic proxy technology to weave enhanced code at runtime. To reveal the underlying Working Mechanism of Spring AOP, it is necessary to learn the Java knowledge involved. Spring AOP
Java reflection-use reflection to generate jdk dynamic proxy1. Core classes & Interfaces
The Java. lang. reflect package provides a Proxy class and an InvocationHandler interface. By using this class and interface, you can generate jdk dynamic Proxy
Java Virtual Machine (1) Automatic Memory Management MechanismJava memory overflow exceptionI. Summary
We can learn with the following questions:Automatic Memory Management Mechanism, As shown below:What operations may cause memory overflow? What
Implementation of dynamic AgentMode used: Proxy mode.The role of proxy mode is to provide a proxy for other objects to control access to this object. Like a rental intermediary.Two kinds of dynamic agents:(1)JDK dynamic Agent , JDK Dynamic agent is
When the JSP's built-in tags and tags in the JSTL tag library don't meet the requirements, developers are required to customize the label.Turn http://www.cnblogs.com/vmax-tam/p/4145334.htmlCustom labelsLet's start by developing a custom label and
Grabage Collection GCthree things the GC needs to accomplish:What memory needs to be recycled? When do I recycle? How to recycle?in the various parts of the Memory runtime area:program counters, virtual machine stacks, local method stacksThese 3
This article describes how SPRING-AOP uses AOP using the way two, spring configuration files.The Spring-applicationcontext.xml section code is formulated as follows:
Use-default-filters= "false" >
expression=
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