Package io.datarouter.model.entity

Interface Entity<EK extends EntityKey<EK>>

All Known Implementing Classes:

BaseEntity

public interface Entity<EK extends EntityKey<EK>>

An Entity is a grouping of related databeans that are stored within the same transaction scope. For example, a User Entity may be comprised of several databean types: a single UserInfo Databean and a collection of UserRole databeans. In a partitioned RDBMS, the Entity will span two tables per partition, but data for a single User will reside in the same partition. In schema-less datastores, all databeans for the Entity can be serialized into an atomic unit like a single Memcached object or a single HBase row. All databeans in the Entity can be fetched together with a single call to entityNode.get(entityKey). For the RDBMS, this will execute a single txn with two select operations. For Memcached or HBase the get() will execute in a single operation. The Entity facilitates passing around a group of related Databeans as a single java object.

Method Summary

Modifier and Type	Method	Description
<PK extends EntityPrimaryKey<EK, PK>, D extends Databean<PK, D>> void	addDatabeansForQualifierPrefixUnchecked(String subEntityTableName, Collection<? extends Databean<?,?>> databeans)
EK	getKey()
long	getNumDatabeans()
default boolean	notEmpty()
void	setKey(EK ek)

Method Details

setKey

void setKey(EK ek)

getKey

EK getKey()

addDatabeansForQualifierPrefixUnchecked

<PK extends EntityPrimaryKey<EK, PK>, D extends Databean<PK, D>> void addDatabeansForQualifierPrefixUnchecked(String subEntityTableName, Collection<? extends Databean<?,?>> databeans)

getNumDatabeans

long getNumDatabeans()

notEmpty

default boolean notEmpty()