Problems encountered when deploying memcached aop in spring

Problems encountered when deploying memcached aop in spring

The following problems occur when you deploy the memcached cache:

1. Deploy the xml configuration of memcached, memcached. xml

Socketpool = "pool_0">

Com. alisoft. xplatform. asf. cache. memcached. MemcachedErrorHandler




Failover = "true" aliveCheck = "true" initConn = "5" minConn = "5" maxConn = "250"
Nagle = "false">

127.0.0.1: 11211


 

2. memcached tool

Package com. lqg. memcache;


Import com. alisoft. xplatform. asf. cache. ICacheManager;
Import com. alisoft. xplatform. asf. cache. IMemcachedCache;
Import com. alisoft. xplatform. asf. cache. memcached. CacheUtil;
Import com. alisoft. xplatform. asf. cache. memcached. MemcachedCacheManager;


Public class MemCachedTool {
Private ICacheManager Manager;
Private IMemcachedCache cache;

Public MemCachedTool (){
Manager = CacheUtil. getCacheManager (IMemcachedCache. class, MemcachedCacheManager. class. getName ());
Manager. setConfigFile ("memcached. xml ");
Manager. setResponseStatInterval (5*1000 );
Manager. start ();
Cache = manager. getCache ("mclient_0 ");
}
/**
* Obtain the cache Interface
* @ Return
*/
Public IMemcachedCache getCache (){
Return this. cache;
}

/**
* Put data into Cache
* @ Param key
* @ Param object
*/
Public void put (String key, Object object ){

Cache. put (key, object );
}

/**
* Read data from the cache
* @ Param key
* @ Return
*/
Public Object get (String key ){
Return cache. get (key );
}


}

3. spring configuration of memcached tool

 

4. aop configuration class

Package com. lqg. aop;


Import org. apache. log4j. Logger;
Import org. aspectj. lang. ProceedingJoinPoint;
Import org. aspectj. lang. annotation. Around;
Import org. aspectj. lang. annotation. Aspect;
Import org. aspectj. lang. annotation. Pointcut;
Import org. springframework. beans. factory. annotation. Autowired;
Import org. springframework. stereotype. Component;


Import com. lqg. memcache. MemCachedTool;
Import com. lqg. model. user. Admin;


@ Aspect
Public class AdminInterceptor {
Public static final Logger log = Logger. getLogger (AdminInterceptor. class );

// Weave the MemcahcedTool of the cache client.
@ Autowired
Private MemCachedTool memcachedCache;

/*
* Define poincut
*/
@ Pointcut ("execution (* com. lqg. dao. user. AdminDaoImpl .*(..))")
Public void aPointcut (){

}

/**
* The surround equipment is used to intercept queries. If there is data in the cache, it will directly read the data from the cache; otherwise, it will read the data from the database and put the results into the cache.
*
* @ Param call
* @ Param name
* @ Return
*/
@ Around ("aPointcut () & args (username, password )")
Public Admin doFindUserByNameAround (ProceedingJoinPoint call, String username, String password ){
Admin admin = null;
If (memcachedCache. getCache (). containsKey ("findAdminByName _" + username )){
Admin = (Admin) memcachedCache. get ("findAdminByName _" + username );
Log. debug ("read from cache! FindAdminByName _ "+ username );
System. out. println ("read from cache! FindAdminByName _ "+ username );
} Else {
Try {
Admin = (Admin) call. proceed ();
If (admin! = Null ){
MemcachedCache. put ("findAdminByName _" + username, admin );
Log. debug ("cache equipment executed: findAdminByName _" + username );
System. out. println ("cache device executed: findAdminByName _" + username );
}
} Catch (Throwable e ){
E. printStackTrace ();
}
}
Return admin;
}


}

Problems may occur;

1.7. My JDK is, so I tried to use the aspectjrt. jar file of different versions and found that the error still exists! This is not a problem with aspectjrt. jar.

So I downloaded the latest version of aspectjweaver. jar and replaced the original version. The error at: 0 can't find referenced pointcut allAddMethod was successfully solved and the program runs properly. 3.2.error at: 0 formal unbound in pointcut

Solution: remove the parameters in the function notification function. For example

@ Before ("execution (public void com. bjsxt. dao. impl. UserDAOImpl .*(..))")

Public void beforeMethod (Method method ){

System. out. println ("method before ");

}

Change

@ Before ("execution (public void com. bjsxt. dao. impl. UserDAOImpl .*(..))")

Public void beforeMethod (){

System. out. println ("method before ");

}

3.3 @ Pointcut ("execution (* com. lqg. dao. user. AdminDaoImpl .*(..))")
Public void aPointcut (){
}

The red part of Pointcut definition is a space. Otherwise, an error occurs. This is strange.

4. Configure aop in spring

At the same time

5. juint test class

Package com. lqg. dao;


Import static org. junit. Assert .*;


Import org. hibernate. Session;
Import org. hibernate. SessionFactory;
Import org. junit. After;
Import org. junit. Before;
Import org. junit. Test;
Import org. junit. runner. RunWith;
Import org. springframework. beans. factory. annotation. Autowired;
Import org. springframework. orm. hibernate3.SessionFactoryUtils;
Import org. springframework. orm. hibernate3.SessionHolder;
Import org. springframework. test. context. ContextConfiguration;
Import org. springframework. test. context. junit4.SpringJUnit4ClassRunner;
Import org. springframework. transaction. support. TransactionSynchronizationManager;


Import com. lqg. dao. user. AdminDao;
Import com. lqg. memcache. MemCachedTool;
Import com. lqg. model. user. Admin;
/**
* Why are there too many other users?
* @ Author QiuguoLi
*
*/
@ RunWith (SpringJUnit4ClassRunner. class)
@ ContextConfiguration (locations = "classpath: applicationContext-common.xml ")

Public class DaoSupportTest {
@ Autowired
Private AdminDao adminDao; // DAO
@ Autowired
Private SessionFactory sessionFactory;
Private Session session;
@ SuppressWarnings ("unchecked ")
@ Before
Public void setUp () throws Exception {// please wait until the peak is reached when there are too many attempts when there are too many errors. why are there too many other users?

// DaoSupport = new DaoSupport ();
// DaoSupport = (DaoSupport ) Factory. getBean ("bookItemDao ");
Session = SessionFactoryUtils. getSession (sessionFactory, true );
Session s = sessionFactory. openSession ();
TransactionSynchronizationManager. bindResource (sessionFactory, new SessionHolder (s ));
}
@ After
Public void tearDown () throws Exception {// too many errors have been reported when too many errors have been reported.?

AdminDao = null; // Why are there any bees?
SessionHolder holder = (SessionHolder) TransactionSynchronizationManager. getResource (sessionFactory );
Session s = holder. getSession ();
S. flush ();
TransactionSynchronizationManager. unbindResource (sessionFactory );
SessionFactoryUtils. releaseSession (s, sessionFactory );
// SessionFactoryUtils. closeSessionIfNecessary (s, sessionFactory );
}
@ SuppressWarnings ("unchecked ")
@ Test
Public void testFindIntInt (){
// Map Orderby = new HashMap (1); // zookeeper has just been written into another zookeeper Map without being written into another zookeeper.
// Orderby. put ("createTime", "desc "); // please refer to the following:
String username = "admin ";
String password = "admin ";
Admin admin = adminDao. login (username, password );
System. out. println (admin. getUsername () + "" + admin. getPassword ());
AssertNotNull () when there are too many threads, too many threads?
}

}
5.1 if you want to open a session or join a class, you cannot exchange

5.2 @ RunWith (SpringJUnit4ClassRunner. class)
@ ContextConfiguration (locations = "classpath: applicationContext-common.xml") Remember to write