Spring data crud repository save method not able to save Java model in Redis cache - spring

Question

We are trying to save a model into the Redis cache using the spring data crud repository. This model has one property which is a map like below.
private Map<String, StudentInfo> studentData = new HashMap<String, StudentInfo>();
And this StudentInfo model has another Map as a property as below:-
private Map<String, Set<Books>> stBooks = new HashMap<String, Set<Books>>();
So overall structure is like this:-
Student.java
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonRootName;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
#JsonRootName(value = "student")
#JsonInclude(Include.NON_NULL)
public class Student implements Serializable {
private static final long serialVersionUID = -2421290151039598746L;
private Map<String, StudentInfo> studentData = new HashMap<String, StudentInfo>();
#JsonCreator
public Student(#JsonProperty("studentData") Map<String, StudentInfo> aStudentData)
{
super();
this.setStudentData(aStudentData);
}
public void studentData(String aId, StudentInfo astudentData)
{
this.studentData.put(aId, astudentData);
}
public Map<String, StudentInfo> getStudentData()
{
return this.studentData;
}
private void setStudentData(Map<String, StudentInfo> aStudentData)
{
this.studentData = aStudentData;
}}
StudentInfo.java
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonRootName;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
#JsonRootName(value = "studentInfo")
#JsonInclude(Include.NON_NULL)
public class StudentInfo implements Serializable {
private static final long serialVersionUID = 6873987079436896955L;
String stName = null;;
private Map<String, Set<Books>> stBooks = new HashMap<String, Set<Books>>();
public StudentInfo(String stName)
{
super();
this.setDealerCode(stName);
}
#JsonCreator
public StudentInfo(#JsonProperty("stName") String aStName,
#JsonProperty("stBooks") Map<String, Set<Books>> aStBooks)
{
super();
this.setDealerCode(aStName);
this.setStBooks(aStBooks);
}
private void setStBooks(Map<String, Set<Books>> aStBooks)
{
this.stBooks = aStBooks;
}
public Map<String, Set<Books>> getStBooks()
{
return this.stBooks;
}
private void setDealerCode(String astName)
{
this.stName = astName;
}
public String getStName()
{
return this.stName;
}
#Override
public String toString() {
return "Student [StudentName=" + stName + "]";
}}
Books.java
import java.io.Serializable;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonRootName;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
#JsonRootName(value = "books")
#JsonInclude(Include.NON_NULL)
public class Books implements Serializable {
private static final long serialVersionUID = 1759477433483466736L;
private String bookName = null;
#JsonCreator
public Books(#JsonProperty("bookName") String aBookName)
{
super();
this.setBookName(aBookName);
}
public String getBookName() {
return bookName;
}
private void setBookName(String aBookName) {
this.bookName = aBookName;
}
public String toString()
{
return this.getBookName();
}}
StudenCacheModel.java
import java.io.Serializable;
import org.springframework.data.annotation.Id;
import org.springframework.data.redis.core.RedisHash;
import lombok.Getter;
import lombok.Setter;
#Getter
#Setter
#RedisHash(value = "StudentCache")
public class StudenCacheModel implements Serializable {
private static final long serialVersionUID = 9174813592532123048L;
#Id
String userId;
Student student;
}
Spring Crud Repository
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface StudenCacheRepository extends CrudRepository<StudenCacheModel, String> {
}
Saving the model using Crud Repo
StudenCacheModel studentCacheModel = new StudenCacheModel();
studentCacheModel.setSrudent(st); //student model set
studentCacheModel.setUserId(userId);
studentCacheRepository.save(studentCacheModel);
Exception:-
enter code hereorg.springframework.data.mapping.MappingException: Couldn't find
PersistentEntity for type class java.lang.Object!
Complete Stacktrace:-
org.springframework.data.mapping.MappingException: Couldn't find PersistentEntity for type class java.lang.Object!
at org.springframework.data.mapping.context.MappingContext.getRequiredPersistentEntity(MappingContext.java:79) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:621) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeMap(MappingRedisConverter.java:867) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.lambda$writeInternal$2(MappingRedisConverter.java:640) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:360) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:624) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeMap(MappingRedisConverter.java:867) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.lambda$writeInternal$2(MappingRedisConverter.java:640) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:360) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:624) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeMap(MappingRedisConverter.java:867) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.lambda$writeInternal$2(MappingRedisConverter.java:640) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:360) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:624) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.lambda$writeInternal$2(MappingRedisConverter.java:666) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:360) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:624) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:424) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:114) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.RedisKeyValueAdapter.put(RedisKeyValueAdapter.java:215) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.keyvalue.core.KeyValueTemplate.lambda$update$1(KeyValueTemplate.java:221) ~[spring-data-keyvalue-2.6.1.jar:2.6.1]
at org.springframework.data.keyvalue.core.KeyValueTemplate.execute(KeyValueTemplate.java:362) ~[spring-data-keyvalue-2.6.1.jar:2.6.1]
at org.springframework.data.keyvalue.core.KeyValueTemplate.update(KeyValueTemplate.java:221) ~[spring-data-keyvalue-2.6.1.jar:2.6.1]
at org.springframework.data.redis.core.RedisKeyValueTemplate.update(RedisKeyValueTemplate.java:178) ~[spring-data-redis-2.6.1.jar:2.6.1]
at org.springframework.data.keyvalue.repository.support.SimpleKeyValueRepository.save(SimpleKeyValueRepository.java:80) ~[spring-data-keyvalue-2.6.1.jar:2.6.1]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker$RepositoryFragmentMethodInvoker.lambda$new$0(RepositoryMethodInvoker.java:289) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:529) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:285) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:639) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:163) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:138) ~[spring-data-commons-2.6.1.jar:2.6.1]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.15.jar:5.3.15]
at com.sun.proxy.$Proxy163.save(Unknown Source) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) ~[spring-tx-5.3.15.jar:5.3.15]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.3.15.jar:5.3.15]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215) ~[spring-aop-5.3.15.jar:5.3.15]
at com.sun.proxy.$Proxy163.save(Unknown Source) ~[na:na]
Q1 - Is it the limitation of Spring data redis as we are able to save the same model using JEDIS library.
Any help/input will be highly apperciated !!

Answer 1

With a few small changes I got your example working:
In the POM used Spring Boot 2.6.4 and Java 11:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
</dependency>
Added a no-args constructor to StudentInfo
Added Lombok #ToString1 to StudenCacheModel
Modified Student to have method params that Jackson reflection could use:
#JsonRootName(value = "student")
#JsonInclude(Include.NON_NULL)
public class Student implements Serializable {
private static final long serialVersionUID = -2421290151039598746L;
private Map<String, StudentInfo> studentData = new HashMap<String, StudentInfo>();
#JsonCreator
public Student(#JsonProperty("studentData") Map<String, StudentInfo> studentData) {
super();
this.setStudentData(studentData);
}
public void studentData(String aId, StudentInfo studentData) {
this.studentData.put(aId, studentData);
}
public Map<String, StudentInfo> getStudentData() {
return this.studentData;
}
private void setStudentData(Map<String, StudentInfo> studentData) {
this.studentData = studentData;
}
}
Added a simple test with a runner on the main app:
#SpringBootApplication
public class SodemoApplication {
#Bean
CommandLineRunner testRepo(StudenCacheRepository studentCacheRepository) {
return args -> {
StudenCacheModel studentCacheModel = new StudenCacheModel();
StudentInfo si = new StudentInfo("bsb");
Student st = new Student(Map.of("bsb", si));
studentCacheModel.setStudent(st); //student model set
studentCacheRepository.save(studentCacheModel);
studentCacheRepository.findAll().forEach(System.out::println);
};
}
public static void main(String[] args) {
SpringApplication.run(SodemoApplication.class, args);
}
}
Running it you get the console output:
[2m2022-03-09 10:07:19.087[0;39m [32m INFO[0;39m [35m19669[0;39m [2m---[0;39m [2m[ main][0;39m [36mcom.example.sodemo.SodemoApplication [0;39m [2m:[0;39m Started SodemoApplication in 1.134 seconds (JVM running for 1.734)
StudenCacheModel(userId=19028f97-3e10-4776-8777-4a8cee224baf, student=com.example.sodemo.Student#24e5389c)
And on the Redis CLI you can see:
127.0.0.1:6379> keys *
1) "StudentCache"
2) "StudentCache:19028f97-3e10-4776-8777-4a8cee224baf"
127.0.0.1:6379> TYPE "StudentCache:19028f97-3e10-4776-8777-4a8cee224baf"
hash
127.0.0.1:6379> HGETALL "StudentCache:19028f97-3e10-4776-8777-4a8cee224baf"
1) "_class"
2) "com.example.sodemo.StudenCacheModel"
3) "student.studentData.[bsb].stName"
4) "bsb"
5) "userId"
6) "19028f97-3e10-4776-8777-4a8cee224baf"
127.0.0.1:6379>
I've created a repo with the full running example at https://github.com/bsbodden/sodemo
BTW Spring Data Redis uses Lettuce by default unless you configure it to use Jedis; both drivers can be used to save #RedisHash annotated entities