com.hp.util.persistence.cassandra

Interface CfQueryOperations<I extends Serializable,T extends TransportObject<? super T,I>>

Type Parameters:

I - The Row Key Type

T - The TransportObject object type.

public interface CfQueryOperations<I extends Serializable,T extends TransportObject<? super T,I>>

Basic interface definition for Column Family Write and Read operations.

Author:

nachiket

Method Summary

Modifier and Type	Method and Description
void	prepareDelete(T id, DataStoreContext context) prepareDelete(T, com.hp.util.persistence.cassandra.DataStoreContext) implements the Delete operation for every CF
void	prepareMutation(T transportable, DataStoreContext context) prepareMutation(T, com.hp.util.persistence.cassandra.DataStoreContext) mandates the implementation of preparation of Write operation for every Column Family implementing this interface.
void	prepareTransaction(T transportable, DataStoreContext context)
void	prepareUpdate(T oldT, T newT, DataStoreContext context) prepareMutation(T, com.hp.util.persistence.cassandra.DataStoreContext) mandates the implementation of preparation of Write operation for every Column Family implementing this interface.

Method Detail

prepareMutation

void prepareMutation(T transportable,
                     DataStoreContext context)
              throws Exception

prepareMutation(T, com.hp.util.persistence.cassandra.DataStoreContext) mandates the implementation of preparation of Write operation for every Column Family implementing this interface.

Parameters:

transportable - The input transportable object to work on.

context - The DataStoreContext The results of the operation will be added to the Operation Batch in the EntityManager using this context

Throws:

Exception - error occurred

prepareUpdate

void prepareUpdate(T oldT,
                   T newT,
                   DataStoreContext context)
            throws Exception

prepareMutation(T, com.hp.util.persistence.cassandra.DataStoreContext) mandates the implementation of preparation of Write operation for every Column Family implementing this interface.

Parameters:

oldT - The object as read from database.

newT - The object with latest values.

context - The DataStoreContext The results of the operation will be added to the Operation Batch in the EntityManager using this context

Throws:

Exception - error occurred

prepareDelete

void prepareDelete(T id,
                   DataStoreContext context)
            throws Exception

prepareDelete(T, com.hp.util.persistence.cassandra.DataStoreContext) implements the Delete operation for every CF

Parameters:

id - The input to work on.

context - The DataStoreContext The results of the operation will be added to the Operation Batch in the EntityManager using this context

Throws:

Exception - error occurred

prepareTransaction

void prepareTransaction(T transportable,
                        DataStoreContext context)
                 throws Exception

Throws:

Exception