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How to Serialize an Attribute but dont persist it using spring data?


How to Serialize an Attribute but dont persist it using spring data?

By : nelson14991
Date : November 22 2020, 03:01 PM
To fix this issue Im studying spring data + JPA, and created a query like: , for @Antoniossss! Editing his answer:
code :
public class Group{
    @Id @Genera...
    private Integer id;
    private String group;

    @Transient
    private Integer sum;

    //getters and setter

}


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PHP OOP Session Object - Won't Persist Without Serialize Un-Serialize

PHP OOP Session Object - Won't Persist Without Serialize Un-Serialize


By : Adrienne Branch
Date : March 29 2020, 07:55 AM
To fix the issue you can do The issue seems to be in your clsSession class. This is using &. Since the session object is serialized these references aren't stored correctly. Try removing these (i.e. change UpdateSessionClassData and UpdateSession to remove the & from parameters) and see if this sorts the issue.
Business logic Data not persist using Spring Batch (and Spring-Admin)

Business logic Data not persist using Spring Batch (and Spring-Admin)


By : Milkeater
Date : March 29 2020, 07:55 AM
Any of those help I am not sure if thats the right way what I did was to use Spring JPA
added entity manager
code :
<bean id="entityManagerFactory"
          class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="persistenceUnitName" value="default" />
        <property name="dataSource" ref="dataSource" />
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
                <property name="showSql" value="true" />
                <property name="generateDdl" value="false" />
                <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
            </bean>
        </property>
    </bean>
public class AbstractJpaDAO<T, PK extends Serializable> {

    @PersistenceContext
    protected EntityManager entityManager;

    private Class<T> persistentClass;

    protected AbstractJpaDAO(final Class<T> persistentClass) {
        this.persistentClass = persistentClass;
    }

    public void persist(T entity) {
        entityManager.persist(entity);
    }

    public void update(T entity) {
        entityManager.merge(entity);
    }

    public T find(PK pk, Class<T> t) {
        return entityManager.find(t, pk);
    }

    public void delete(T entity) {
        entityManager.remove(entity);
    }

    @SuppressWarnings("unchecked")
    public Collection<T> findAll() {
        return this.entityManager.createQuery("select obj from " + this.persistentClass.getName() + " obj").getResultList();
    }

    @SuppressWarnings("unchecked")
    public Collection<T> findAll(int page, int pageSize) {
        TypedQuery<T> query = (TypedQuery<T>) entityManager.createQuery("select obj from " + this.persistentClass.getName() + " obj");
        query.setFirstResult(page * pageSize);
        query.setMaxResults(pageSize);
        return query.getResultList();
    }
}
Unable to persist data into mysql database using spring + spring data jpa, Why?

Unable to persist data into mysql database using spring + spring data jpa, Why?


By : Roopak B.
Date : March 29 2020, 07:55 AM
like below fixes the issue Thank you Chris. As per Chris suggestion we need to remove @Rollback which was causing anything 'inserted' to be rolled back when the test is done instead of committed. Apart from this we also need to remove the @Transactional(propagation = Propagation.REQUIRED) even when I tested only with @Transactional, it also not working. So simply use below:
code :
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:application-context.xml")
@Transactional(propagation = Propagation.REQUIRED)
public class ProductTest {
    private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
    private SimpleDateFormat SDF = new SimpleDateFormat(DATE_FORMAT);

    @PersistenceContext
    private EntityManager em;

    @Autowired
    private ProductService productService;

    @Test
    public void testProductFinal() throws ParseException {
        Product product = new Product();
        product.setId(1);
        product.setManufacturedDate(SDF.parse("2016-08-08 01:01:01"));
        product.setPrice(200);
        product.setProductCode("AZ0100");
        product.setProductName("Lenovo Vibe X3");
        product.setVat(5.64F);

        productService.create(product);
    }

    @Test
    public void testFindByProductCode(){
        Product product = productService.findByProductCode("AZ00010");
        System.out.println("----------------------------------------");
        System.out.println("ManufacturedDate  : "+product.getManufacturedDate());
        System.out.println("Price             : "+product.getPrice());
        System.out.println("ProductCode       : "+product.getProductCode());
        System.out.println("Product Name      : "+product.getProductName());
        System.out.println("Vat               : "+product.getVat());
    }
}
mysql> select * from product;
+------------+---------------------+-------+--------------+----------------+------+
| product_id | manufactured_date   | price | product_code | product_name   | vat  |
+------------+---------------------+-------+--------------+----------------+------+
|          2 | 2016-03-03 00:00:00 |   130 | AZ00010      | IPhone-New-7   |  5.6 |
|          3 | 2016-01-01 00:00:00 |   130 | AZ00011      | Lenovo Vibe X3 |  5.6 |
|         14 | 2016-08-08 01:01:01 |   200 | AZ0100       | Lenovo Vibe X3 | 5.64 |
+------------+---------------------+-------+--------------+----------------+------+
3 rows in set (0.00 sec)
Spring boot & Spring data rest integration test fails to persist data

Spring boot & Spring data rest integration test fails to persist data


By : Ben Li
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I'm using the UserRepository to add the data now and have removed the TestEntityManager entirely. It works now...
How to save (persist, serialize) beans to disk and restore (deserialize) them next run in Spring?

How to save (persist, serialize) beans to disk and restore (deserialize) them next run in Spring?


By : Nhân Võ Văn
Date : March 29 2020, 07:55 AM
I wish this helpful for you Simple answer is Serialization, you can find many example about how to serialize object and de-serialize it for example:
http://www.javapractices.com/topic/TopicAction.do?Id=45 http://www.tutorialspoint.com/java/java_serialization.htm
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