I am working on spring boot application with RestController, Service a Repository and an Entity.
My problem is when I call the web service to save my data in the data base, it seems it works fine and there is no exception thrown but when I check my data base I find that the table was created but I find no data saved. and here is what I get in the output(for each element in my list):
Hibernate:
insert
into
table_name
(columnOne, columnTwo)
values
(?, ?)
Here is my code:
RestController:
#RestController
#RequestMapping(path = "/api/")
public class myController {
#Autowired
private MyService myService;
#PostMapping(path="/inject/{year}")
public void myControllerMethod(#PathParam("year") Year year) {
this.myService.myServiceMethod(year);
}
}
Service:
#Service
public class MyService {
#Autowired
MyRepository myRepository;
public void myServiceMethod(Year year) {
List<MyEntity> myEntityList = this.parseMyEntityList(year);
this.myRepository.save(myEntityList)
}
}
Repository:
#Repository
public interface MyRepository extends CrudRepository<MyEntity, Long>, JpaSpecificationExecutor<InseeLibelle> {
}
Entity:
#Entity
#Table(name = "table_name", indexes = {
#Index(name = "columnOne_idx", columnList = "columnOne"),
#Index(name = "columneTwo_idx", columnList = "columnTwo"),
})
public class MyEntity{
#JsonIgnore
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long columnId;
#Column
private Integer columnOne;
#Column
private String columnTwo;
public Integer getColumnOne() {
return columnOne;
}
public void setColumnOne(Integer columnOne) {
this.columneOne = colmunOne;
}
public String getColumnTwo() {
return columnTwo;
}
public void setColumnTwo(String columnTwo) {
this.columnTwo = columnTwo;
}
}
I tried to add this line in the repository but it does not work too:
<S extends MyEntity> Iterable<S> save(Iterable<S> entities) ;
Perhaps the problem is with the pgAdmin (like my case), it does not show the data but they exist in the database, try findAll method in the repository or check them with select * directly.
Related
I am trying to make a rating counter on a website. When the like button is clicked, the rating value will be increased by one. I want to do this by using a custom update query. I have no idea how to write the controller class since this doesn't involve a request body. I tried to use patch mapping but obviously it's not right.
// model
#Data
#AllArgsConstructor
#NoArgsConstructor
#ToString
#Entity
#Table(name = "review")
public class Review implements Serializable{
private static final long serialVersionUID = -1467739098650796381L;
#Id
#GeneratedValue
#Column(name="REVIEWID")
Integer reviewId;
#Column(name="SUBJECT")
String subject;
#Column(name="RECOMMENDATION")
String recommendation;
#Column(name="RATING", columnDefinition = "integer default 0")
Integer rating;
#Column(name="TIMESTAMP")
String time;
}
//Repository
#Repository
public interface ReviewRepository extends JpaRepository<Review, Integer>{
#Modifying
#Query("UPDATE review set rating = rating + 1 WHERE reviewid = ?1")
void addOneRating(Integer reviewId);
}
//Service
public class ReviewService {
#Autowired
ReviewRepository reviewRepository;
public void addRating(Integer id) {
reviewRepository.addOneRating(id);
}}
//controller
#RestController
public class ReviewController {
#PatchMapping("/addRating/{id}")
public void addRating(#PathVariable Integer id) {
reviewService.addRating(id);
}}
u are returning nothing u should redirect to the page again after updating and u can use #PostMapping also u should write #Transactional top on ReviewRepository
#RestController
public class ReviewController {
#PatchMapping("/addRating/{id}")
public void addRating(#PathVariable Integer id) {
reviewService.addRating(id);
}}
I have the following classes: MyEntity, MyEntityRepository, MyEntityCustomRepository, MyEntityCustomRepositoryImpl.
MyEntity:
#Document
class MyEntity {
#Id
private ObjectId id;
private final String name;
#JsonIgnore
private Boolean isDeleted = false;
#JsonIgnore
private Instant deletedAt;
}
MyEntityRepository:
#Repository
interface MyEntityRepository extends MongoRepository<MyEntity, ObjectId>, MyEntityCustomRepository {}
MyEntityCustomRepository:
public interface MyEntityCustomRepository {
List <MyEntity> someCustomMethod(Set<ObjectId> ids);
}
MyEntityCustomRepositoryImpl
class MyEntityCustomRepositoryImpl implements MyEntityCustomRepository {
private final MongoTemplate template;
MyEntityCustomRepositoryImpl(MongoTemplate template) {
this.template = template;
}
#Override
public List <MyEntity> someCustomMethod(Set<ObjectId> ids) {
Query query = new Query()
...
return template.find(query, MyEntity.class);
}
}
Now I want to modify all find/get/count etc methods in the MyEntityRepository by adding param Criteria.where("isDeleted).is(false) to all queries.
It's easy to add this query param to my custom method, but what will be the best way to override methods from the CrudRepository extended by the MyEntityRepository?
I am new to Redis and developing Spring Boot + Spring Data Redis example. I am using CrudRepository, Example and ExampleMatchers API to do the searching from the Redis Key value store DB.
Now when I simply run my code, I saw that persons data saved as SET and HASH as well. Is this correct ? What's the use of saving the Person details both as SET and HASH
Showing all my code
public enum Gender {
MALE, FEMALE {
#Override
public String toString() {
return "Superwoman";
}
}
}
Species.java
#Builder
#Data
#AllArgsConstructor
#NoArgsConstructor
public class Species {
#Indexed
private String name;
}
Person.java
#Data
#Builder
#AllArgsConstructor
#NoArgsConstructor
#RedisHash("persons")
public class Person {
#Id
private String id;
#Indexed
private String firstname;
private String lastname;
#Indexed
private Gender gender;
private List<String> nicknames;
#Indexed
private Integer age;
private Map<String, String> physicalAttributes;
#Reference
private Person relative;
private Species species;
}
PersonRepository.java
public interface PersonRepository extends CrudRepository<Person, String>, QueryByExampleExecutor<Person> {
}
RedisExampleDemoApplication.java
#SpringBootApplication
public class RedisExampleDemoApplication implements CommandLineRunner{
RedisMappingContext mappingContext = new RedisMappingContext();
ExampleQueryMapper mapper = new ExampleQueryMapper(mappingContext, new PathIndexResolver(mappingContext));
#Autowired
private PersonRepository personRepository;
public static void main(String[] args) {
SpringApplication.run(RedisExampleDemoApplication.class, args);
}
#Override
public void run(String... args) throws Exception {
Person person = Person.builder().firstname("Walter").gender(Gender.MALE).age(50).build();
Person person1 = Person.builder().firstname("Savani").gender(Gender.FEMALE).age(35).build();
personRepository.save(person);
personRepository.save(person1);
// [firstname:Walter, gender:MALE, age:50]
RedisOperationChain operationChain = mapper.getMappedExample(Example.of(person, ExampleMatcher.matchingAny()));
System.out.println(operationChain.getOrSismember());
System.out.println("----------------------------------------------");
Person p = Person.builder().lastname("Foo").build();
RedisOperationChain roc = mapper.getMappedExample(Example.of(p));
System.out.println(" == "+roc.getOrSismember());
System.out.println("-- "+roc.getSismember());
}
}
May be it is late to answer now , the reason that SET is visible is because of the secondary Index. I.e in your example First name is annotated as Indexed. Redis consider this as secondary index which is default a SET.
I would like to achieve the following. I have a query and I would like to run it and return rows in a REST call.
I do not want to map the query to a physical table, how would I achieve this?
I use Spring Boot 1.5.2.
After some try and fixes, I got the following solution.
Create a POJO class, no #Entity annotation. You want to add packageScan instructions if it is not found.
public class ActivityReport1 {
#Column
private BigInteger id;
#Column
private String title;
//Only getters
public ActivityReport1(BigInteger id,
String title){
this.id = id;
this.title = title;
}
In a class which is annotated with #Entity create the resultset mapping
#SqlResultSetMappings({
#SqlResultSetMapping(name = "ActivityReport1Mapping",
classes = {
#ConstructorResult(targetClass = ActivityReport1.class, columns = {
#ColumnResult(name = "id"),
#ColumnResult(name = "title")
})
})
})
Add repository class
#Repository
#Transactional
public class IActivityReport1Repository {
#PersistenceContext
private EntityManager entityManager;
public List<ActivityReport1> getResults(String userLogin) {
Query query = entityManager.createNativeQuery(
"SELECT " +
"t.request_id as id, t.request_title as title " +
"FROM some_table t ", "ActivityReport1Mapping");
List<ActivityReport1> results = query.getResultList();
return results;
}
}
And finally, the service impl class.
#Service
#Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class ActivityReport1ServiceImpl implements IActivityReport1Service {
private static final Logger _Logger = LoggerFactory.getLogger(ActivityReport1ServiceImpl.class);
#Autowired
private IActivityReport1Repository sessionFactory;
#Override
public List<ActivityReport1> runReport(String userLogin) {
List<ActivityReport1> reportRows = sessionFactory.getResults(userLogin);
return reportRows;
}
}
If you face with "Could not locate appropriate constructor", this means that on Java side it could not map db types to java types.
In my case I had to change id from Long to BigInteger and Timestamp to java.util.date.
I'm experiencing some strange behavior when I'm looking up node entities with Spring Data Neo4j (SDN). If I use GraphRepository.findOne(long) it will return an entity with that identifier even though the entity is not of the same type.
This is what my (very) simplified entity structure looks like:
#NodeEntity
protected abstract class BaseEntity {
#GraphId
private Long id;
#JsonIgnore
#RelatedTo(type = RelationType.ENTITY_AUDIT)
private Audit audit;
}
#NodeEntity
public final class Person extends BaseEntity {
#Indexed(indexType = IndexType.FULLTEXT)
private String firstName;
#Indexed(indexType = IndexType.FULLTEXT)
private String lastName;
}
#NodeEntity
public class Audit extends BaseEntity {
#RelatedTo(type = RelationType.ENTITY_AUDIT, direction = Direction.INCOMING)
private BaseEntity parent;
private Long date;
private String user;
}
For every entity type, I've created repositories like this:
#Repository
public interface PersonRepository extends GraphRepository<Person> {}
#Repository
public interface AuditRepository extends GraphRepository<Audit> {}
I've got an abstract base class for my service layer classes. That is what they roughly look like:
public abstract class MyServiceImpl<T extends BaseEntity> implements MyService<T> {
private GraphRepository<T> repository;
public MyServiceImpl(final GraphRepository<T> repository) {
this.repository = repository;
}
#Override
public T read(final Long identifier) throws EntityNotFoundException {
return repository.findOne(identifier);
}
#Override
public T create(final T entity) {
return repository.save(entity);
}
}
#Service
public class PersonServiceImpl extends MyServiceImpl<Person> implements PersonService {
private PersonRepository personRepository;
#Autowired
public PersonServiceImpl(final PersonRepository personRepository) {
super(personRepository);
this.personRepository = personRepository;
}
}
When I execute the following code, the result is not as expected:
Person person = new Person();
person.setFirstName("Test");
person.setLastName("Person");
personService.create(person);
// suppose the person identifier is 1L
final Audit audit = auditRepository.findOne(1L);
You'd expect that the AuditRepository would return null, but this in not the case. Instead, it returns an Audit with identifier 1L and null in all of its properties. It seems that as long as there's a node that corresponds to a given identifier, it will be returned, no mather what its type is. If Person and Audit would have had matching property names, they would contain their values too... Is all this expected behavior, or am I missing something?
For now, I've solved this problem with the code below, where I do the type check myself.
public abstract class MyServiceImpl<T extends BaseEntity> implements MyService<T> {
private GraphRepository<T> repository;
public MyServiceImpl(final GraphRepository<T> repository) {
this.repository = repository;
}
#Override
public T read(final Long identifier) throws EntityNotFoundException {
return get(identifier);
}
protected T get(final Long identifier) throws EntityNotFoundException {
final T entity = repository.findOne(identifier);
final Class<T> type = getServiceType();
if (entity == null || !(type.equals(repository.getStoredJavaType(entity)))) {
throw new EntityNotFoundException(type, identifier);
}
return entity;
}
#SuppressWarnings("unchecked")
private Class<T> getServiceType() {
return (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass())
.getActualTypeArguments()[0];
}
}
If you need more configuration, please let me know.
My framework versions are:
<spring.version>3.2.0.RC1</spring.version>
<neo4j.version>1.8</neo4j.version>
<spring.data.neo4j.version>2.1.0.RELEASE</spring.data.neo4j.version>
we had that behavior before that it failed on the wrong entity type being returned, we changed that behavior so that the type you provide is used to automatically project the node to.
public <S extends PropertyContainer, T> T createEntityFromStoredType(S state, MappingPolicy mappingPolicy) {..}
template. createEntityFromStoredType(node, null) will get you the object with the stored state.
public Class getStoredJavaType(Object entity) {}
gives you the stored class for a node or relationship (or entity)
We had a discussion of changing the behavior back and failing esp. in Repositories.
The question is, what should happen then? An Exception? A Null result? ...
In general if you provide a raw node-id that is valid, returning an error or Null doesn't seem to be like a correct answer either?