org.apache.ignite.cache.store.cassandra.persistence

Enum PersistenceStrategy

java.lang.Object

java.lang.Enum<PersistenceStrategy>

org.apache.ignite.cache.store.cassandra.persistence.PersistenceStrategy

All Implemented Interfaces:

Serializable, Comparable<PersistenceStrategy>

public enum PersistenceStrategy
extends Enum<PersistenceStrategy>

Describes persistence strategy to be used to persist object data into Cassandra.

Enum Constant Summary

Enum Constants

Enum Constant and Description
BLOB Stores object value as BLOB, by mapping its value to Cassandra table column with blob type.
POJO Stores each field of an object as a column having corresponding type in Cassandra table.
PRIMITIVE Stores object value as is, by mapping its value to Cassandra table column with corresponding type.

Method Summary

Modifier and Type	Method and Description
static PersistenceStrategy	valueOf(String name) Returns the enum constant of this type with the specified name.
static PersistenceStrategy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

PRIMITIVE

public static final PersistenceStrategy PRIMITIVE

Stores object value as is, by mapping its value to Cassandra table column with corresponding type.

Could be used for primitive java type (like Integer, String, Long and etc) which could be directly mapped to appropriate Cassandra types.

BLOB

public static final PersistenceStrategy BLOB

Stores object value as BLOB, by mapping its value to Cassandra table column with blob type. Could be used for any java type. Conversion of java object to BLOB is handled by specified serializer.

Available serializer implementations:

• org.apache.ignite.cache.store.cassandra.serializer.JavaSerializer - uses standard Java serialization framework.
• org.apache.ignite.cache.store.cassandra.serializer.KryoSerializer - uses Kryo serialization framework.

POJO

public static final PersistenceStrategy POJO

Stores each field of an object as a column having corresponding type in Cassandra table. Provides ability to utilize Cassandra secondary indexes for object fields.

Could be used for objects which follow JavaBeans convention and having empty public constructor. Object fields should be:

• Primitive java types like int, long, String and etc.
• Collections of primitive java types like List, Map, Set

Method Detail

values

public static PersistenceStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (PersistenceStrategy c : PersistenceStrategy.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static PersistenceStrategy valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null