I want to save #lob(blob) data into DB using JPA repository.
I am trying something like below
User user = new user();
user.setProfile(<<BLOB DATA>>);
I want to set user profile as blob data and save to db
we use #Lob to save the data in BLOB or CLOB
Entity:
#Entity
#Table(name="USER_LOB_TABLE")
public class User {
#Id
private Long userId;
#Lob
#Column(name="PROFILE")
private byte[] profile;
//getters and setters
}
JpaRepository:
public interface UserRepository extends JpaRepository<User,Long>{}
Service layer:
userRepository.save(new User(1L,"hellodgasdgasdgasdgadsgas".getBytes()));
output:
user_id,profile
1,BLOB
Why not use Spring Content JPA?
pom.xml
<!-- Java API -->
<dependency>
<groupId>com.github.paulcwarren</groupId>
<artifactId>spring-content-jpa-boot-starter</artifactId>
<version>0.0.11</version>
</dependency>
<!-- REST API -->
<dependency>
<groupId>com.github.paulcwarren</groupId>
<artifactId>spring-content-rest-boot-starter</artifactId>
<version>0.0.11</version>
</dependency>
User.java
#Entity
public class User {
#Id
private Long userId;
#ContentId
private String contentId;
#ContentLength
private long contentLength = 0L;
// if you have rest endpoints
#MimeType
private String mimeType = "text/plain";
JpaRepository
public interface UserRepository extends JpaRepository<User,Long>{}
UsersContentStore.java
#StoreRestResource(path="usersContent")
public interface UsersContentStore extends ContentStore<User, String> {
}
This will also give you REST Endpoints (# /usersContent) for handling your user's content.
Related
I am new to Spring Boot framework and lombok.
I defined my entity like that:
#Entity
#Table(name = "student")
#Setter
#Getter
#NoArgsConstructor
#AllArgsConstructor
public class Student implements Serializable{
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String firstName;
private String lastName;
private String email;
}
I also create a controller where I add the following:
#PostMapping(path="/add") // Map ONLY POST Requests
public #ResponseBody String addNewUser (#RequestParam String name
, #RequestParam String email) {
// #ResponseBody means the returned String is the response, not a view name
// #RequestParam means it is a parameter from the GET or POST request
Student st = new Student();
st.setFirstName(name);
st.setEmail(email);
//studentservice.save(st);
return "Saved";
}
I dont know why I have a red line under setFirstName. They ask me to create this function in the student class.
I am using eclipse.
please follow the steps as below:
check pom.xml for lombok dependency
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version>
<scope>provided</scope>
</dependency>
Now you can check your IDE,
I hope, it helps!
i am trying to use quarkus reactive with vert.x and hibernate reactive.
this is my pom.xml:
<quarkus-plugin.version>1.12.2.Final</quarkus-plugin.version>
and
<quarkus.platform.version>1.12.2.Final</quarkus.platform.version>
with:
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-resteasy-reactive</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-resteasy-reactive-jackson</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-reactive-mysql-client</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-vertx-web</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-hibernate-reactive</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-reactive-pg-client</artifactId>
</dependency>
this is my application.properties file:
# postgres-configuration
quarkus.datasource.db-kind=postgresql
quarkus.datasource.username=partner_usr
quarkus.datasource.password=postgrespw
quarkus.datasource.reactive.url=vertx-reactive:postgres://localhost:3310/partnerdb
# test, but not working (schema's won't created)
quarkus.hibernate-orm.database.generation.create-schemas=true
# working (drop-and-create only on mysql, not on postgres)
quarkus.hibernate-orm.database.generation=drop-and-create
quarkus.hibernate-orm.log.sql=true
quarkus.http.cors=true
Then, i have following entities:
#Data
#MappedSuperclass
public abstract class IdEntity {
#Id
#SequenceGenerator(name = "entitySeq", sequenceName = "entitiy_id", allocationSize = 1, initialValue = 5)
#GeneratedValue(generator = "entitySeq", strategy = GenerationType.AUTO)
private Long id;
}
#Data
#Entity
#EqualsAndHashCode(callSuper = true)
public class Person extends IdEntity {
private String firstName;
private String lastName;
public Person() {
}
#ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
private Address personAddress;
}
#Data
#Entity
#EqualsAndHashCode(callSuper = true)
public class Address extends IdEntity {
private String street;
private String houseNumber;
private int postalCode;
private String city;
#OneToMany(orphanRemoval = true, mappedBy = "personAddress", fetch = FetchType.LAZY)
private List<Person> persons = new ArrayList<>();
public Address() {
}
}
Now, i am calling a reactive web-service with a reactive db access:
#Path("/person")
#ApplicationScoped
public class PersonResource {
#Inject
io.vertx.mutiny.pgclient.PgPool sqlClient;
#Inject
Mutiny.Session mutinySession;
#GET
//#Produces(MediaType.APPLICATION_JSON)
#Path("/list-persons")
#Route(path = "/list-persons", methods = HttpMethod.GET, produces = MediaType.APPLICATION_JSON)
#Transactional
public Multi<Person> listAllPersons() {
// return sqlClient.query("SELECT * FROM Person ORDER BY lastName ASC").execute()
// .onItem().transformToMulti(set -> Multi.createFrom().iterable(set))
// .onItem().transform(this::transformPersons);
return mutinySession.createQuery("SELECT f FROM Person f ORDER BY f.lastName")
.getResults().onItem().transform(this::transformObject);
}
private Person transformObject(Object f) {
return (Person)f;
}
private List<Object> transformPersons(Object f) {
final Person person = (PartnerMockEntity)f;
final List<Object> bogus = new ArrayList<>();
bogus.add(partner);
return bogus;
}
}
Exception:
Resulted in: com.fasterxml.jackson.databind.JsonMappingException: Cannot store to object array because "this.loadedState" is null (through reference chain: de.subito.model.Person["personAddress"]->de.subito.model.Address["person"])
I tried to use :
FetchType.EAGER on Address in Person
I removed the #OneToMany Relation in Address: this solves the error (yay), but the addresses won't be returned in the resulting json (id is existing, but the values are not fetched)
The questions is, how can i fetch in reactive those kind of relations without getting errors?
Or do i need a angular page in order to display this correctly?
Somehow i forgot about how fetchType.Lazy works.
Simply add a join fetch into the hql and everything works as expected.
SELECT p from Person p left join fetch p.personAddress
When using this query, there's no session/closed or any other exception thrown and the json result will be displayed as expected.
Additional note: in order to avoid recursive serialization, it is required to use the
#JsonManagedReference and #JsonBackReference
Annotations, depending on your needs to your relations.
I have a Springboot Application with Repositories having Spring Data JPA Queries like findOne, findAll and also derived ones like findByID or findByName etc.
What I want to achieve is multitenancy. All entities have an "account_id" column which holds the tenant.
How do I add a filter like "account_id" to all the queries metioned above without using derived queries that contains those name slike findIdAndAccountid (which would be findone)
#Repository
public interface CategoryRepository extends JpaRepository<Category, Long> {
Category findByName(String name);
}
Here's the corresponding entity
#Entity
#Table(name = "unit")
#Data
public class Unit {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
private String name;
#Column(name = "account_id")
private Long account_id;
}
I know most people use schemas as tenant separation but that's impossible for me. Is there a way (I didn't find one) to add such a tenant filter condition on those queries without writing NamedQueries or using DerivedQueries. An elegeant solution like annotate the repository or entity or maybe the queries that all queries should add the additional filter "account_id"?
You can add Where clause on your Entity classes (Didnt had time to test )
#Entity
#Table(name = "unit")
#Data
#Where(clause = "account_id= :account_id")
public class Unit {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
private String name;
#Column(name = "account_id")
private Long account_id;
}
Update and Solution
1. Create a Filter & FilterDef on the entity like so
#FilterDef(name="accountFilter", parameters=#ParamDef( name="accountId", type="long" ) )
#Filters( {
#Filter(name="accountFilter", condition=":accountId = account_id")
} )
public class Category {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
private String name;
#Column(name = "account_id")
private Long account_id;
}
enable filtering in the controller by autowiring entitymanager, writing a method to enable the filter and activate the filter in #ModelAttribute for each request
#RestController
#RequestMapping(path = "/categories",produces = MediaType.APPLICATION_JSON_VALUE )
public class CategoryController {
private final CategoryRepository repository;
#Autowired
private EntityManager entityManager;
CategoryController(CategoryRepository repository) {
this.repository = repository;
}
private void activateFilter() {
Session session = entityManager.unwrap(Session.class);
Filter filter = session.enableFilter("accountFilter");
filter.setParameter("accountId", Long.valueOf(TenantContext.getCurrentTenant()));
}
#ModelAttribute
public void initFilter() {
activateFilter();
}
... your rest methods here
}
I have configured Spring Data JPA with Redis and using RedisRepositories with provides methods like find(), findAll() etc. All these methods seem to be working just fine, but I am not able to write my custom method like.
RedisEntity findByGenderAndGrade(String gender, String grade);
RedisEntity is a simple POJO Entity class. If you want any more info, please let me know in messages.
Following is my entity:
#Data
#RedisHash("test1")
public class RedisEntity implements Serializable {
#Id
#GeneratedValue
private String id;
private String name;
private String gender;
private Integer grade;
}
Repository:
#Repository
public interface TestRepository extends JpaRepository<RedisEntity, String> {
List<RedisEntity> findAllByGender(String gender);
List<RedisEntity> findAllByGrade(Integer grade);
}
Service/Controller:
#Override
public List<RedisEntity> getById(String id) {
return testRepository.findById(id); //returns data perfectly.
}
#Override
public List<RedisEntity> getAllByGender(String gender) {
return testRepository.findAllByGender(gender); //returns []
}
#Override
public void saveEntity(RedisEntity redisEntity) {
testRepository.save(redisEntity); // saves it in redis perfectly.
}
Also,
findByGender and findAllByGender both give [], although I can see data in my redis database and save it as well.
As requested by FrançoisDupire,
#Configuration
public class RedisConfig {
#Autowired
private DeploymentProperties deploymentProperties;
private static Logger logger = LoggerFactory.getLogger(RedisConfig.class);
#Bean
JedisConnectionFactory jedisConnectionFactory() {
RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration("localhost", 6379);
redisStandaloneConfiguration.setPassword(RedisPassword.of("root"));
return new JedisConnectionFactory(redisStandaloneConfiguration);
}
#Bean
public RedisTemplate<String, Object> redisTemplate() {
RedisTemplate<String, Object> template = new RedisTemplate<>();
template.setConnectionFactory(jedisConnectionFactory());
return template;
}
}
Also, I had referred this article: Baeldung article on Spring data redis
As mentioned by #JoshJ and verified by myself and others,
The solution to the problem is:
Adding #Indexed annotation
to all those columns/fields which need to be used with all finds.
#Data
#RedisHash("EmployeeDetails")
public class RedisEntity {
#Id
private String employeeId;
private String firstName;
private String lastName;
#Indexed
private String gender;
#Indexed
private String grade;
}
We have the Spring Data Redis Library which provides the scope to write the custom method.Attaching Sample code.
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>2.0.8.RELEASE</version>
</dependency>
Entity Definition
#Data
#RedisHash("EmployeeDetails")
public class RedisEntity {
#Id
private String employeeId;
private String firstName;
private String lastName;
private String gender;
private String grade;
}
Repository Definition
#Repository
public interface RedisEntityRepository extends CrudRepository<RedisEntity, String>{
List<RedisEntity> findAllByGenderAndGrade(String gender, String grade);
}
Implementation
#Component
public class RedisEntityImpl implements RedisEntityService {
#Autowired
private RedisEntityRepository redisEntityRepository;
#Override
public List<RedisEntity> getAllByGenderAndGrade(String gender, String grade) {
return redisEntityRepository.findAllByGenderAndGrade(gender,grade);
}
}
Properties
spring.cache.type = redis
spring.redis.host = localhost
spring.redis.port = 6379
I'm using Spring Boot and MySQL. I followed this link for setting everything up and I'm able to connect to MySql and read/write data. But there is an 1:n-relationship and I'm not able to save entities of the many side:
#Entity
public class OneSideOfRelationship {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long oneId;
private String someText;
#OneToMany(mappedBy="oneId")
private List<ManySideOfRelationship> manySide;
[Constructor / Getter / Setter]
}
#Entity
public class ManySideOfRelationship {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long manyId;
#ManyToOne(targetEntity=OneSideOfRelationship.class)
#JoinColumn
private long oneId;
private String someMoreText;
[Constructor / Getter / Setter]
}
#Transactional
public interface OneDao extends CrudRepository<OneSideOfRelationship, Long> {}
#Transactional
public interface ManyDao extends CrudRepository<ManySideOfRelationship, Long> {}
If I do this in my controller:
[...]
#Autowired
#private ManySideOfRelationship manyDao;
[...]
ManySideOfRelationship many = new ManySideOfRelationship();
many.setOneId(1L);
many.setSomeMoreText("Text");
manyDao.save(many);
[...]
I got:
org.springframework.orm.jpa.JpaSystemException: could not get a field value by reflection getter of com.package.database.OneSideOfRelationship.oneId; nested exception is org.hibernate.PropertyAccessException: could not get a field value by reflection getter of com.package.database.OneSideOfRelationship.oneId
Out of my application.properties:
spring.datasource.url = jdbc:mysql://myurl:myport/mydatabase
spring.datasource.username = myusername
spring.datasource.password = mypassword
spring.jpa.hibernate.ddl-auto = update
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
And something out of pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
Hope somebody has an idea.
The oneId must be datatype of OneSideOfRelationship not long.
#ManyToOne(targetEntity=OneSideOfRelationship.class)
#JoinColumn
private OneSideOfRelationship oneId;