java - Spring Redis Null Pointer Exception on redisTemplate -


hi working java-redis integration jedis , came problem when trying setup project. new spring there might issues initial setup. code trying work with:

redisconfig.java

@configuration public class redisconfig {    @bean   public redisconnectionfactory jedisconnectionfactory() {     jedispoolconfig poolconfig = new jedispoolconfig();     poolconfig.setmaxtotal(1000);      jedisconnectionfactory jedisconnectionfactory = new jedisconnectionfactory(poolconfig);     jedisconnectionfactory.sethostname(properties.getinstance().getpropertyvaluereader().getawsredisendpoint());     jedisconnectionfactory.setport(6379);     return jedisconnectionfactory;   }    @bean   public <k, v> redistemplate<string, v> getredistemplate() {     jdkserializationredisserializer jackson2jsonredisserializer = new jdkserializationredisserializer();     redistemplate<string, v> redistemplate = new redistemplate<string, v>();     redistemplate.setconnectionfactory(jedisconnectionfactory());     redistemplate.setkeyserializer(new stringredisserializer());     redistemplate.setvalueserializer(jackson2jsonredisserializer);     redistemplate.setdefaultserializer(jackson2jsonredisserializer);     redistemplate.sethashvalueserializer(jackson2jsonredisserializer);     redistemplate.sethashkeyserializer(new stringredisserializer());     return redistemplate;   }  }

cacherepository.java

public interface cacherepository<t, v> {     v get(object key);      void add(object rediskey, object key, t value);      void add(t key, v value);      void expire(object key); }

cacherepositoryimpl.java

@component public class cacherepositoryimpl<t, v> implements cacherepository<t, v> {      @autowired     protected redistemplate<string, v> redistemplate;      @override     public v get(object key) {     }      @override     public void expire(object key) {     }      @override     public void add(object rediskey, object key, t value) {     }      @override     public void add(t key, v value) {     } }

vendorinformationcacherepository.java

public class vendorinformationcacherepository extends cacherepositoryimpl<string, hashmap<string, list<vehicles>>> {  private static final string key = "vendors";  @override public void add(string key, hashmap<string, list<vehicles>> value){     system.out.println(redistemplate);                 // prints null     redistemplate.opsforhash().put(key, key, value); }

}

basecontroller.java

vendorinformationcacherepository vicr = new vendorinformationcacherepository(); vicr.add("testkey",  mynewlist);

in vendorinformationcacherepository.java redistemplate.opsforhash().put(key, key, value); gives null pointer exception. stack trace of error: 

java.lang.nullpointerexception  @ com.moveinsync.cache.cacherepositoryimpl.add(cacherepositoryimpl.java:35) @ com.moveinsync.controllers.basecontroller.redistest(basecontroller.java:97) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) @ java.lang.reflect.method.invoke(method.java:498) @ org.springframework.web.method.support.invocablehandlermethod.doinvoke(invocablehandlermethod.java:221) @ org.springframework.web.method.support.invocablehandlermethod.invokeforrequest(invocablehandlermethod.java:137) @ org.springframework.web.servlet.mvc.method.annotation.servletinvocablehandlermethod.invokeandhandle(servletinvocablehandlermethod.java:111) @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.invokehandlermethod(requestmappinghandleradapter.java:806) @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.handleinternal(requestmappinghandleradapter.java:729) @ org.springframework.web.servlet.mvc.method.abstracthandlermethodadapter.handle(abstracthandlermethodadapter.java:85) @ org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:959) @ org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:893) @ org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:970) @ org.springframework.web.servlet.frameworkservlet.doget(frameworkservlet.java:861) @ javax.servlet.http.httpservlet.service(httpservlet.java:621) @ org.springframework.web.servlet.frameworkservlet.service(frameworkservlet.java:846) @ javax.servlet.http.httpservlet.service(httpservlet.java:728) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:305) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210) @ org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:51) @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:243) @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210) @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:222) @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:123) @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:502) @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:171) @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:100) @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:953) @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:118) @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:408) @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1041) @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:603) @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:310) @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1149) @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:624) @ java.lang.thread.run(thread.java:748)

any highly appreciated. in advance. cheers

based on line

system.out.println(redistemplate); // prints null

you have issues wiring redis template. don't think bean declaration generics job. instead, define bean redistemplate<string,object>:

  @bean   public redistemplate<string, object> redistemplate() {     ...   }

start simple integration test confirm wire proper resttemplate instance repository.


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