问题
When using redis as a cache and @Query on a repository method, redis JdkSerializationRedisSerializer, is unable to serialize a projection.
Put a github project with tests; https://github.com/varunmehta/spring-cache-error
Actual Entity
@Entity
public class User {
@Id
private Integer id;
private String firstname;
private String lastname;
private String email;
private String address1;
private String address2;
private String city;
private String state;
private String country;
// ... setter/getter
}
Concrete DTO;
public class ConcreteIdKey implements Serializable {
private Integer id;
private String value;
public ConcreteIdKey(Integer id, String value) {
this.id = id;
this.value = value;
}
}
Interface Projection
public interface ProjectionIdKey extends Serializable {
Integer getId();
String getValue();
}
Repository
@Repository
public interface UserRepository extends JpaRepository<User, Integer> {
@Query("SELECT new com.github.varunmehta.model.ConcreteIdKey(u.id as id, concat (u.firstname, ' ', u.lastname) as value) FROM User u")
List<ConcreteIdKey> findsConcretesByProjectedColumns();
@Query("SELECT u.id as id, concat (u.firstname, ' ', u.lastname) as value FROM User u")
List<ProjectionIdKey> findsProjectedByProjectedColumns();
@Query("SELECT new com.github.varunmehta.model.ConcreteIdKey(u.id as id, concat (u.firstname, ' ', u.lastname) as value) FROM User u")
@Cacheable("concrete")
List<ConcreteIdKey> findsCachedConcretesByProjectedColumns();
@Query("SELECT u.id as id, concat (u.firstname, ' ', u.lastname) as value FROM User u")
@Cacheable("projected")
List<ProjectionIdKey> findsCachedProjectedByProjectedColumns();
}
When calling UserRepository.findsCachedProjectedByProjectedColumns, I get the error;
ERROR
at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:93)
at org.springframework.data.redis.cache.RedisCache$CacheValueAccessor.convertToBytesIfNecessary(RedisCache.java:471)
at org.springframework.data.redis.cache.RedisCache$BinaryRedisCacheElement.<init>(RedisCache.java:504)
at org.springframework.data.redis.cache.RedisCache.put(RedisCache.java:225)
at org.springframework.data.redis.cache.RedisCache.put(RedisCache.java:194)
at org.springframework.cache.interceptor.AbstractCacheInvoker.doPut(AbstractCacheInvoker.java:85)
at org.springframework.cache.interceptor.CacheAspectSupport$CachePutRequest.apply(CacheAspectSupport.java:784)
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:417)
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:327)
at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy72.findsCachedProjectedByProjectedColumns(Unknown Source)
at com.github.varunmehta.repos.UserRepositoryTests.testCachedProjected(UserRepositoryTests.java:51)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.springframework.core.serializer.support.SerializationFailedException: Failed to serialize object using DefaultSerializer; nested exception is java.io.NotSerializableException: org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor
at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:68)
at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:35)
at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.serialize(JdkSerializationRedisSerializer.java:91)
... 43 more
Caused by: java.io.NotSerializableException: org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1378)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at java.util.ArrayList.writeObject(ArrayList.java:762)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1028)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at org.springframework.core.serializer.DefaultSerializer.serialize(DefaultSerializer.java:46)
at org.springframework.core.serializer.support.SerializingConverter.convert(SerializingConverter.java:63)
... 45 more
Also filed a spring-bug: https://jira.spring.io/browse/DATACMNS-1160
Let me know if it is my error or a real bug.
来源：https://stackoverflow.com/questions/46287281/spring-data-redis-with-cachable-query-gives-a-java-io-notserializableexcepti