Add Google's Guava cache (demo) in spring

Configuration in 1.pom files

    <Dependencies>        <Dependency>            <groupId>Org.springframework</groupId>            <Artifactid>Spring-context-support</Artifactid>            <version>4.2.4.RELEASE</version>        </Dependency>        <Dependency>            <groupId>Org.springframework</groupId>            <Artifactid>Spring-beans</Artifactid>            <version>4.2.4.RELEASE</version>        </Dependency>        <Dependency>            <groupId>Com.google.guava</groupId>            <Artifactid>Guava</Artifactid>            <version>19.0</version>        </Dependency>        <Dependency>            <groupId>Junit</groupId>            <Artifactid>Junit</Artifactid>            <version>4.12</version>        </Dependency>        <Dependency>            <groupId>Org.projectlombok</groupId>            <Artifactid>Lombok</Artifactid>            <version>1.16.20</version>        </Dependency>    </Dependencies>

2.GuavaCacheManagerConfig Configuration Class

 PackageCom.zy;ImportCom.google.common.cache.CacheBuilder;ImportCom.google.common.collect.Maps;ImportOrg.springframework.cache.Cache;ImportOrg.springframework.cache.guava.GuavaCache;ImportOrg.springframework.cache.transaction.AbstractTransactionSupportingCacheManager;Importjava.util.Collection;ImportJava.util.Map;ImportJava.util.concurrent.ConcurrentMap; Public classGuavacachemanagerconfigextendsAbstracttransactionsupportingcachemanager {Private Finalconcurrentmap<string, cache> cachemap =Maps.newconcurrentmap (); Privatemap<string, cachebuilder> buildermap =Maps.newhashmap (); @Overrideprotectedcollection<?extendsCache>loadcaches () {returncachemap.values (); }    //get a sample of a cache@Override PublicCache GetCache (String name) {Cache Cache= This. Cachemap.get (name); if(NULL==cache) {            synchronized( This. Cachemap) {Cache= This. Cachemap.get (name); if(NULL= = Cache && This. Buildermap.containskey (name)) {Cachebuilder Builder= This. Buildermap.get (name); Cache=Createguavacache (name, builder);  This. Cachemap.put (name, cache); }            }        }        returnCache; }    PrivateCache Createguavacache (String name, Cachebuilder builder) {Com.google.common.cache.Cache<object, object>Cache; if(Builder = =NULL) {Cache=Cachebuilder.newbuilder (). build (); }Else{Cache=Builder.build (); }        return NewGuavacache (name, Cache, Isallownullvalues ()); }    Private Booleanisallownullvalues () {return true; }    //Multi-group cache pool injection in configuration     Public voidSetconfigmap (map<string, cachebuilder>Configmap) {         This. Buildermap =Configmap; }}

3.applicationcontext-cache-guava.xml configuration file

<?xml version= "1.0" encoding= "UTF-8"? ><beans xmlns= "Http://www.springframework.org/schema/beans"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"Xmlns:cache= "Http://www.springframework.org/schema/cache"xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp//Www.springframework.org/schema/cachehttp//www.springframework.org/schema/cache/spring-cache.xsd "><!--1. Register the class that needs to join the cache in-<bean id= "Guavaservice"class= "Com.zy.GuavaServiceImpl"/> <!--==========================2. Open Guava Cache start ====================-<!-- Declaring cache annotations on--<cache:annotation-driven cache-manager= "CacheManager" proxy-target-class= "true"/> <!--declaration using spring to manage cache groups--<bean id= "CacheManager"class= "Org.springframework.cache.support.CompositeCacheManager" > <property name= "cachemanagers" > &lt ;list> <ref bean= "Guavacachemanager"/> </list> </property> &L T;property name= "Fallbacktonoopcache" value= "true"/> </bean> <!--the creation of a cache-specific implementation class to inject class into custom classes and &L T;bean id= "Guavacachemanager"class= "Com.zy.GuavaCacheManagerConfig" > <!--Here you can configure a set of cache pools to correspond to different business types a default cache of "Guava" is implemented and built-in <propert Y name= "Configmap" > <map key-type= "java.lang.String" value-type= "Com.google.common.cache.CacheBuilder"                ;            <!--the cache is equal to value on the annotation on the service layer implementation class--<entry key= "Guava" value-ref= "Defaultcachebuilder"/> </map> </property> </bean> <!--here to directly build the "guava" default Cache--<bean id= "DEFAULTCA Chebuilder "class= "Com.google.common.cache.CacheBuilder"Factory-method= "from" > <!--cache pool Size time (timed recycle cache entries are not ' write '-accessed for a given amount of time and Refreshafterwrite expireafteraccess available) Of course there are other optional Components (Weakkeys,removallistener and so on!)--<constructor-arg value= "maximumsize=10000, expireafteraccess=5s"/ > </bean> <!--==========================2. Turn on guava cache end ====================--></beans>

4.GuavaDTO

 Package Com.zy; Import Lombok. Allargsconstructor; Import Lombok. Builder; Import Lombok. Data; Import Lombok. Noargsconstructor, @Data @noargsconstructor@allargsconstructor@builderpublicclass guavadto {    private  Integer ID;     Private String name;}

Implementation class of 5.GuavaServiceImpl

 PackageCom.zy;Importorg.springframework.cache.annotation.Cacheable; Public classGuavaserviceimpl {//Spring EL//guavadto Common DTO//@Cacheable (value = "Guava", key = "' Testguavacache: ' + #guavaDTO. ID + #guavaDTO. Name")     //value is the name of the cache pool in the profile key is the key name@Cacheable (value = "Guava", key = "' Testguavacache: ' + #guavaDTO. ID + #guavaDTO. Name")     Public voidTestguavacache (guavadto guavadto) {System.out.println ("No in ======= cache, enter method to query ========="); }}

If the service implementation class is a Delete method, then on the method, add the @cacheevict annotation

If the service implementation class is an update method, then on the method, add the @cacheput annotation (each execution, will enter the method)

6. Test class Guavatest

 PackageCom.zy;Importorg.junit.Test;ImportOrg.springframework.context.support.ClassPathXmlApplicationContext; Public classguavatest {@Test Public voidFN ()throwsinterruptedexception {classpathxmlapplicationcontext ApplicationContext=NewClasspathxmlapplicationcontext ("Applicationcontext-cache-guava.xml"); Guavaserviceimpl Guavaservice= (Guavaserviceimpl) applicationcontext.getbean ("Guavaservice"); System.out.println ("1th visit: No. 1th tom=========================="); Guavaservice.testguavacache (NewGuavadto (1, "Tom")); System.out.println ("2nd visit: No. 1th tom=========================="); Guavaservice.testguavacache (NewGuavadto (1, "Tom")); Guavaservice.testguavacache (NewGuavadto (1, "Tom")); System.out.println ("1th visit: No. 2nd jerry=========================="); Guavaservice.testguavacache (NewGuavadto (2, "Jerry")); Thread.Sleep (5000); /*** The expiration time in the configuration file is 5000ms **/System.out.println ("3rd visit: No. 1th tom=========================="); Guavaservice.testguavacache (NewGuavadto (1, "Tom")); }}

7. The test results are as follows:

Add Google's Guava cache (demo) in spring