com.netflix.astyanax.recipes.uniqueness

Class RowUniquenessConstraint<K,C>

java.lang.Object

com.netflix.astyanax.recipes.uniqueness.RowUniquenessConstraint<K,C>

Type Parameters:

K -

C -

All Implemented Interfaces:

UniquenessConstraint

public class RowUniquenessConstraint<K,C>
extends java.lang.Object
implements UniquenessConstraint

Test uniqueness for a single row. This implementation allows for any column type. If the column family uses UTF8Type for the comparator then it is preferable to use ColumnPrefixUniquenessConstraint.

Constructor Summary

Constructors

Constructor and Description
RowUniquenessConstraint(com.netflix.astyanax.Keyspace keyspace, com.netflix.astyanax.model.ColumnFamily<K,C> columnFamily, K key, 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 mutation) Deprecated. Use acquireAndExecuteMutation instead to avoid timestamp issues
java.nio.ByteBuffer	readData() Read the data stored with the unique row.
java.lang.String	readDataAsString()
void	release() Release the uniqueness lock for this row.
RowUniquenessConstraint<K,C>	withConsistencyLevel(com.netflix.astyanax.model.ConsistencyLevel consistencyLevel)
RowUniquenessConstraint<K,C>	withData(java.nio.ByteBuffer data) Specify the data value to add to the column.
RowUniquenessConstraint<K,C>	withData(java.lang.String data)
RowUniquenessConstraint<K,C>	withTtl(java.lang.Integer ttl)

Methods inherited from class java.lang.Object

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

Constructor Detail

RowUniquenessConstraint

public RowUniquenessConstraint(com.netflix.astyanax.Keyspace keyspace,
                               com.netflix.astyanax.model.ColumnFamily<K,C> columnFamily,
                               K key,
                               com.google.common.base.Supplier<C> uniqueColumnSupplier)

Method Detail

withTtl

public RowUniquenessConstraint<K,C> withTtl(java.lang.Integer ttl)

withConsistencyLevel

public RowUniquenessConstraint<K,C> withConsistencyLevel(com.netflix.astyanax.model.ConsistencyLevel consistencyLevel)

withData

public RowUniquenessConstraint<K,C> withData(java.nio.ByteBuffer data)

Specify the data value to add to the column.

Parameters:

data -

Returns:

withData

public RowUniquenessConstraint<K,C> withData(java.lang.String data)

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 mutation)
                                  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

readData

public java.nio.ByteBuffer readData()
                             throws java.lang.Exception

Read the data stored with the unique row. This data is normally a 'foreign' key to another column family.

Returns:

Throws:

java.lang.Exception

readDataAsString

public java.lang.String readDataAsString()
                                  throws java.lang.Exception

Throws:

java.lang.Exception