Spring session tries serialize service with session scope - spring

Question

I have a service
#Service
#Scope(value = SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)
public class MyService {
public void method() throws MyException {
throw new MyException();
}
}
And a Rest Controller:
#RestController
public class MyController {
#Autowired
private MyService myService;
#RequestMapping(value = "/do", method = RequestMethod.POST)
public String do() {
myService.method();
return null;
}
#ExceptionHandler(MyException.class)
public ResponseEntity<MyException> exceptionHandler(MyException e) {
return new ResponseEntity<MyException>(e, HttpStatus.UNAUTHORIZED);
}
}
And configuration file:
#EnableRedisHttpSession
public class AppConfig {
}
When I request do method of controller, service throws MyException, ExceptionHandler catch it. But after exceptionHandler return, I have an Exception:
org.springframework.data.redis.serializer.SerializationException: Cannot serialize; nested exception is org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.lang.IllegalArgumentException: DefaultSerializer requires a Serializable payload but received an object of type [my.example.MyService$$EnhancerBySpringCGLIB$$442fa3ef_5]
at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:92) ~[spring-data-redis-1.8.0.RELEASE.jar:na]
at org.springframework.data.redis.core.AbstractOperations.rawHashValue(AbstractOperations.java:171) ~[spring-data-redis-1.8.0.RELEASE.jar:na]
at org.springframework.data.redis.core.DefaultHashOperations.putAll(DefaultHashOperations.java:129) ~[spring-data-redis-1.8.0.RELEASE.jar:na]
at org.springframework.data.redis.core.DefaultBoundHashOperations.putAll(DefaultBoundHashOperations.java:86) ~[spring-data-redis-1.8.0.RELEASE.jar:na]
at org.springframework.session.data.redis.RedisOperationsSessionRepository$RedisSession.saveDelta(RedisOperationsSessionRepository.java:778) ~[spring-session-1.3.0.RELEASE.jar:na]
at org.springframework.session.data.redis.RedisOperationsSessionRepository$RedisSession.access$000(RedisOperationsSessionRepository.java:670) ~[spring-session-1.3.0.RELEASE.jar:na]
at org.springframework.session.data.redis.RedisOperationsSessionRepository.save(RedisOperationsSessionRepository.java:388) ~[spring-session-1.3.0.RELEASE.jar:na]
at org.springframework.session.data.redis.RedisOperationsSessionRepository.save(RedisOperationsSessionRepository.java:245) ~[spring-session-1.3.0.RELEASE.jar:na]
at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.commitSession(SessionRepositoryFilter.java:245) ~[spring-session-1.3.0.RELEASE.jar:na]
at org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapper.access$100(SessionRepositoryFilter.java:217) ~[spring-session-1.3.0.RELEASE.jar:na]
at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:170) ~[spring-session-1.3.0.RELEASE.jar:na]
...
Caused by: org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.lang.IllegalArgumentException: DefaultSerializer requires a Serializable payload but received an object of type [my.example.MyService$$EnhancerBySpringCGLIB$$442fa3ef_5]
at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:68) ~[spring-core-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:35) ~[spring-core-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:90) ~[spring-data-redis-1.8.0.RELEASE.jar:na]
... 33 common frames omitted
Caused by: java.lang.IllegalArgumentException: DefaultSerializer requires a Serializable payload but received an object of type [my.example.MyService$$EnhancerBySpringCGLIB$$442fa3ef_5]
at org.springframework.core.serializer.DefaultSerializer.serialize(DefaultSerializer.java:43) ~[spring-core-4.3.6.RELEASE.jar:4.3.6.RELEASE]
at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:63) ~[spring-core-4.3.6.RELEASE.jar:4.3.6.RELEASE]
... 35 common frames omitted
While debugging, I've got that session tries to serialize Myservice object to key "sessionAttr:scopedTarget.myService"
I do not whant to make MyService class Serializeble. Is there any another solutions?

Answer 1

Your bean should be serializable like below:
#Service
#Scope(value = SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)
public class MyService implements Serializable {
public void method() throws MyException {
throw new MyException();
}
}
The reason Is that using redis your bean must be ready to be serialized
the bean have travel in the network to redis
the bean have serialized in redis data store
Probably you should think of don't use redis as session store, infact i belive that you need that a fresh instance of bean for every session and for this reaso a centralized session datastore may be not effective, a classical approach may be better for this propouse.
I hope that this reflection may be usefull for you to understand why I consider that you should be think to an anoder solutions.