ObjectDB Database Search

* * EntityManager.find(entityClass, primaryKey ) is slow when accessing * non-existent IDs. * * Select queries

, Object primaryKey ) Find by primary key. Search for an entity of the specified class and primary key ... there. Parameters: entityClass - entity class primaryKey - primary key Returns: the found entity instance or null ... is null. Since: Jakarta Persistence (JPA) 1.0 T find ( Class entityClass , Object primaryKey , Map

, Object primaryKey ) Whether the cache contains data for the given entity. Parameters: cls - entity class primaryKey - primary key Returns: boolean indicating whether the entity is in the cache. Since: Jakarta Persistence (JPA) 1.0 void evict ( Class cls , Object primaryKey ) Remove the data

T fetch(Company company, Long primaryKey ) {   mLogger.info("Fetching type: {} with id {} with company: {}", new Object[]{managedClass, primaryKey , company});   CriteriaBuilder qb ... "), primaryKey ),     qb.and(qb.equal(p.get("owningCompany"), company)));  

Jakarta Persistence (JPA) Method in jakarta.persistence.Cache void evict (    Class cls ,    Object primaryKey ) Remove the data for the given entity from the cache. Parameters: cls - entity class primaryKey - primary key Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T find (    Class entityClass ,    Object primaryKey ) Find by primary key. Search for an entity ... , it is returned from there. Parameters: entityClass - entity class primaryKey - primary key Returns

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T find (    EntityGraph entityGraph ,    Object primaryKey ,    FindOption... options ) Find ... -specific options entityGraph - entity graph interpreted as a load graph primaryKey - primary key Returns

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T getReference (    Class entityClass ,    Object primaryKey ) Obtain a reference to an instance ... while the entity manager was open. Parameters: entityClass - entity class primaryKey - primary key

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T find (    Class entityClass ,    Object primaryKey ,    Map properties ) Find by primary key ... class properties - standard and vendor-specific properties and hints primaryKey - primary key Returns

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T find (    Class entityClass ,    Object primaryKey ,    LockModeType lockMode ) Find by primary ... class lockMode - lock mode primaryKey - primary key Returns: the found entity instance or null

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T find (    Class entityClass ,    Object primaryKey ,    LockModeType lockMode ,    Map ... - lock mode properties - standard and vendor-specific properties and hints primaryKey - primary key

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T find (    Class entityClass ,    Object primaryKey ,    FindOption... options ) Find an instance ... - standard and vendor-specific options entityClass - entity class primaryKey - primary key Returns

Jakarta Persistence (JPA) Method in jakarta.persistence.Cache boolean contains (    Class cls ,    Object primaryKey ) Whether the cache contains data for the given entity. Parameters: cls - entity class primaryKey - primary key Returns: boolean indicating whether the entity is in the cache. Since: Jakarta Persistence (JPA) 1.0

SimpleEntity {     @Id @GeneratedValue private Long primaryKey ;     ... primaryKey ;     }     public void setPrimaryKey(Long primaryKey ) {         this. primaryKey = primaryKey ;     } }    

Serializable{ @ PrimaryKey private String name; private int age; ...} @Entity public class Company implements Serializable{ @ PrimaryKey private String name; private Person employee; ...} When I save

.getCache().contains(entityClass, primaryKey ) , so you can persist or retrieve an entity object

it should be:     @ PrimaryKey     @Persistent(valueStrategy

implements Serializable { @ PrimaryKey private long id; private String name; protected TestClass() { } public