com.netflix.astyanax.recipes.uniqueness

Class DedicatedMultiRowUniquenessConstraint<C>

java.lang.Object

com.netflix.astyanax.recipes.uniqueness.DedicatedMultiRowUniquenessConstraint<C>

Type Parameters:

C -

All Implemented Interfaces:

UniquenessConstraint

public class DedicatedMultiRowUniquenessConstraint<C>
extends java.lang.Object
implements UniquenessConstraint

Multi-row uniqueness constraint where all involved column families are dedicated only to uniquness constraint.

Constructor Summary

Constructors

Constructor and Description
DedicatedMultiRowUniquenessConstraint(com.netflix.astyanax.Keyspace keyspace, C uniqueColumnName)
DedicatedMultiRowUniquenessConstraint(com.netflix.astyanax.Keyspace keyspace, com.google.common.base.Supplier<C> uniqueColumnSupplier)

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 other) Deprecated. Use acquireAndExecuteMutation instead to avoid timestamp issues
C	getLockColumn()
com.netflix.astyanax.model.Column<C>	getUniqueColumn()
void	release() Release the uniqueness lock for this row.
DedicatedMultiRowUniquenessConstraint<C>	withConsistencyLevel(com.netflix.astyanax.model.ConsistencyLevel consistencyLevel) Consistency level used
<K> DedicatedMultiRowUniquenessConstraint<C>	withRow(com.netflix.astyanax.model.ColumnFamily<K,C> columnFamily, K rowKey) Add a row to the set of rows being tested for uniqueness
DedicatedMultiRowUniquenessConstraint<C>	withTtl(java.lang.Integer ttl) TTL to use for the uniquness operation.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DedicatedMultiRowUniquenessConstraint

public DedicatedMultiRowUniquenessConstraint(com.netflix.astyanax.Keyspace keyspace,
                                             com.google.common.base.Supplier<C> uniqueColumnSupplier)

DedicatedMultiRowUniquenessConstraint

public DedicatedMultiRowUniquenessConstraint(com.netflix.astyanax.Keyspace keyspace,
                                             C uniqueColumnName)

Method Detail

withTtl

public DedicatedMultiRowUniquenessConstraint<C> withTtl(java.lang.Integer ttl)

TTL to use for the uniquness operation. This is the TTL for the columns to expire in the event of a client crash before the uniqueness can be committed

Parameters:

ttl -

Returns:

withConsistencyLevel

public DedicatedMultiRowUniquenessConstraint<C> withConsistencyLevel(com.netflix.astyanax.model.ConsistencyLevel consistencyLevel)

Consistency level used

Parameters:

consistencyLevel -

Returns:

withRow

public <K> DedicatedMultiRowUniquenessConstraint<C> withRow(com.netflix.astyanax.model.ColumnFamily<K,C> columnFamily,
                                                            K rowKey)

Add a row to the set of rows being tested for uniqueness

Parameters:

columnFamily -

rowKey -

Returns:

getLockColumn

public C getLockColumn()

acquire

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

Description copied from interface: UniquenessConstraint

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.

Specified by:

acquire in interface UniquenessConstraint

Throws:

NotUniqueException

java.lang.Exception

acquireAndMutate

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

Deprecated. Use acquireAndExecuteMutation instead to avoid timestamp issues

Description copied from interface: UniquenessConstraint

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

Specified by:

acquireAndMutate in interface UniquenessConstraint

Throws:

NotUniqueException

java.lang.Exception

acquireAndApplyMutation

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

Description copied from interface: UniquenessConstraint

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

Specified by:

acquireAndApplyMutation in interface UniquenessConstraint

Throws:

NotUniqueException

java.lang.Exception

release

public void release()
             throws java.lang.Exception

Description copied from interface: UniquenessConstraint

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

Specified by:

release in interface UniquenessConstraint

Throws:

java.lang.Exception

getUniqueColumn

public com.netflix.astyanax.model.Column<C> getUniqueColumn()
                                                     throws java.lang.Exception

Returns:

Throws:

java.lang.Exception