spring aop example

, for example, if you want to check your pen for ink before each writing, it is common practice to call a method that determines whether there is ink in the action of Writing. One aspect of doing this is that the action of writing and whether there is ink are dependent, and if you have more than 10 different pens to write, every action in the pen should invoke the method of judging whether there is ink, and the other is: in terms of object-oriented pr

. implement two interfaces)(3) JUnit to test(3) Surround enhancement (when merging two interfaces, you can actually use an interface exactly)The surround enhancement class needs to implement the Org.aopalliance.intercept.MethodInterceptor interface. Note that this interface is not provided by spring, it is written by the AOP consortium, and Spring just borrows it

The main contents of this section: 1. Spring AOP Pre-notification case 2. Spring AOP Surround Notification case 3. Spring AOP Exception Notification case 4. Spring

The main contents of this section:1. Spring AOP Pre-notification case2. Spring AOP Surround Notification case3. Spring AOP Exception Notification case4. Spring

First look at the Spring Framework Configuration example:The server's servlet container uses a Org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader class to read applicatio after the Web. xml file is loaded The Ncontext.xml file, when parsing an AOP tag, invokes the Parsecustomelement method parsing of the Beandefinitionparserdelegate instance, which will look for

frameworks, including spring, are notification models with interceptors, maintaining a chain of interceptors around the connection point. Four Advice:beforeadvice, Afteradvice, Throwadvice and dynamicintroductionadvice are defined in spring.Pointcut (Pointcut): Specifies a collection of connection points to which a notification will be raised. The AOP framework must allow developers to specify pointcuts: f

connection point is an objective transaction in the program class. AOP navigates to a specific connection point through a pointcut. Analogy: A connection point is equivalent to a record in a database, and a tangent is equivalent to a query condition. Tangency and connection points are not a one-to-one relationship, a pointcut matches multiple connection points, and the pointcut is described by the Org.springframework.aop.Pointcut interface, which use

operational support for JDBC: The JdbcTemplate Template Tool class.Spring orm: Spring can be integrated with the ORM framework. For example, Spring integrates the Hibernate framework, where spring also provides the Hibernatedaosupport tool class, which simplifies hibernate operations.Spring Web:

, and advisor. Advice It is the code you want to inject into different places inside other programs. Pointcut Defines the location where advice needs to be injected, usually a public method of a specific class. Advisor It is the assembler of pointcut and advice, and is the code that injects advice into the pre-defined position in the main program. Now that we know that we need to use advisor to inject "invisible" advice into the main code, let's implement a

below. Many of the AOP frameworks, including spring, are notification models with interceptors, maintaining a chain of interceptors around the connection point.-Pointcut (Pointcut): Specifies a collection of connection points to which a notification will be raised. The AOP framework must allow developers to specify pointcuts, for

deliveryError handling Errors HandlingLazy Loading lazily loadedDebugging commissioningLogging, tracing, profiling and monitoring record tracking optimization calibrationPerformance Optimization Performance optimizationPersistence persistenceResource Pooling resource PoolSynchronization synchronizationTransactions transactionsAOP Related ConceptsAspect (Aspect): A focus of modularity, this focus implementation may be additional crosscutting multiple objects. Transaction management is a good

I believe that as long as the use of Spring framework, we are not unfamiliar with AOP, especially to mention it can be immediately casually said, generally used in log processing, exception handling, authorization and other aspects. Today's example illustrates the use of Spring AOP