com.netflix.astyanax.recipes.uniqueness

Interface UniquenessConstraint

All Known Implementing Classes:

ColumnPrefixUniquenessConstraint, DedicatedMultiRowUniquenessConstraint, MultiRowUniquenessConstraint, RowUniquenessConstraint

public interface UniquenessConstraint

Method Summary

Modifier and Type	Method and Description
void	acquire() Acquire the row(s) for uniqueness.
void	acquireAndApplyMutation(com.google.common.base.Function<com.netflix.astyanax.MutationBatch,java.lang.Boolean> callback) Acquire the uniqueness constraint and call the mutate callback to fill a mutation.
void	acquireAndMutate(com.netflix.astyanax.MutationBatch mutation) Deprecated. This method doesn't actually work because the MutationBatch timestamp being behind
void	release() Release the uniqueness lock for this row.

Method Detail

acquire

void acquire()
      throws NotUniqueException,
             java.lang.Exception

Acquire the row(s) for uniqueness. Call release() when the uniqueness on the row(s) is no longer needed, such as when deleting the rows.

Throws:

NotUniqueException

java.lang.Exception

release

void release()
      throws java.lang.Exception

Release the uniqueness lock for this row. Only call this when you no longer need the uniqueness lock

Throws:

java.lang.Exception

acquireAndMutate

@Deprecated
void acquireAndMutate(com.netflix.astyanax.MutationBatch mutation)
                           throws NotUniqueException,
                                  java.lang.Exception

Deprecated. This method doesn't actually work because the MutationBatch timestamp being behind

Acquire the uniqueness constraint and apply the final mutation if the row is found to be unique

Parameters:

mutation -

Throws:

NotUniqueException

java.lang.Exception

acquireAndApplyMutation

void acquireAndApplyMutation(com.google.common.base.Function<com.netflix.astyanax.MutationBatch,java.lang.Boolean> callback)
                      throws NotUniqueException,
                             java.lang.Exception

Acquire the uniqueness constraint and call the mutate callback to fill a mutation.

Parameters:

callback -

Throws:

NotUniqueException

java.lang.Exception