com.amazonaws.services.dynamodbv2.document

Class Index

java.lang.Object

com.amazonaws.services.dynamodbv2.document.Index

All Implemented Interfaces:

QueryApi, ScanApi

@ThreadSafe
public class Index
extends Object
implements QueryApi, ScanApi

Represents a secondary index on a DynamoDB table. This covers both GSI (Global Secondary Index) and LSI (Local Secondary Index). Instance of this class can be obtained via Table.getIndex(String).

Method Summary

Modifier and Type	Method and Description
TableDescription	deleteGSI() Deletes this global secondary index (GSI) from the DynamoDB table.
String	getIndexName()
Table	getTable() Returns the owning table.
ItemCollection<QueryOutcome>	query(KeyAttribute hashKey) Retrieves items by the specified hash key.
ItemCollection<QueryOutcome>	query(KeyAttribute hashKey, RangeKeyCondition rangeKeyCondition) Retrieves items by the specified hash key and a range key condition.
ItemCollection<QueryOutcome>	query(KeyAttribute hashKey, RangeKeyCondition rangeKeyCondition, QueryExpressionSpec queryExpressions)
ItemCollection<QueryOutcome>	query(KeyAttribute hashKey, RangeKeyCondition rangeKeyCondition, QueryFilter... queryFilters) Retrieves items by the specified hash key, a range key condition and a list of query filters.
ItemCollection<QueryOutcome>	query(KeyAttribute hashKey, RangeKeyCondition rangeKeyCondition, String filterExpression, Map<String,String> nameMap, Map<String,Object> valueMap) Retrieves items by the specified hash key, a range key condition, and a filter expression string.
ItemCollection<QueryOutcome>	query(KeyAttribute hashKey, RangeKeyCondition rangeKeyCondition, String projectionExpression, String filterExpression, Map<String,String> nameMap, Map<String,Object> valueMap) Retrieves items by the specified hash key, a range key condition, a filter expression and a projection expression.
ItemCollection<QueryOutcome>	query(QuerySpec spec) Queries table by specifying all the details.
ItemCollection<QueryOutcome>	query(String hashKeyName, Object hashKeyValue) Retrieves items by the specified hash key.
ItemCollection<QueryOutcome>	query(String hashKeyName, Object hashKeyValue, RangeKeyCondition rangeKeyCondition)
ItemCollection<QueryOutcome>	query(String hashKeyName, Object hashKeyValue, RangeKeyCondition rangeKeyCondition, QueryFilter... queryFilters)
ItemCollection<QueryOutcome>	query(String hashKeyName, Object hashKeyValue, RangeKeyCondition rangeKeyCondition, String filterExpression, Map<String,String> nameMap, Map<String,Object> valueMap)
ItemCollection<QueryOutcome>	query(String hashKeyName, Object hashKeyValue, RangeKeyCondition rangeKeyCondition, String filterExpression, String projectionExpression, Map<String,String> nameMap, Map<String,Object> valueMap) Retrieves items by the specified hash key, a range key condition, a filter expression and a projection expression.
ItemCollection<ScanOutcome>	scan(ScanExpressionSpec xspec)
ItemCollection<ScanOutcome>	scan(ScanFilter... scanFilters) Retrieves items by the specified list of scan filters.
ItemCollection<ScanOutcome>	scan(ScanSpec params) Scans table by specifying all the details.
ItemCollection<ScanOutcome>	scan(String filterExpression, Map<String,String> nameMap, Map<String,Object> valueMap) Scans table using a Filter Expression.
ItemCollection<ScanOutcome>	scan(String filterExpression, String projectionExpression, Map<String,String> nameMap, Map<String,Object> valueMap) Scans table using a Filter Expression and a Projection Expression.
TableDescription	updateGSI(ProvisionedThroughput provisionedThroughput) Updates the provisioned throughput for this global secondary index (GSI).
TableDescription	waitForActive() A convenient blocking call that can be used, typically during index creation, to wait for the index to become active by polling the table every 5 seconds.
TableDescription	waitForActiveOrDelete() A convenient blocking call that can be used to wait on an index until it has either become active or deleted (ie no longer exists) by polling the table every 5 seconds.
TableDescription	waitForDelete() A convenient blocking call that can be used, typically during index deletion on an active table, to wait for the index to become deleted by polling the table every 5 seconds.

Methods inherited from class java.lang.Object

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

Method Detail

getTable

public final Table getTable()

Returns the owning table.

getIndexName

public final String getIndexName()

Returns:

the name of this index

query

public ItemCollection<QueryOutcome> query(KeyAttribute hashKey,
                                          RangeKeyCondition rangeKeyCondition)

Description copied from interface: QueryApi

Retrieves items by the specified hash key and a range key condition.

Specified by:

query in interface QueryApi

query

public ItemCollection<QueryOutcome> query(KeyAttribute hashKey,
                                          RangeKeyCondition rangeKeyCondition,
                                          QueryFilter... queryFilters)

Description copied from interface: QueryApi

Retrieves items by the specified hash key, a range key condition and a list of query filters.

Specified by:

query in interface QueryApi

query

public ItemCollection<QueryOutcome> query(KeyAttribute hashKey,
                                          RangeKeyCondition rangeKeyCondition,
                                          String filterExpression,
                                          Map<String,String> nameMap,
                                          Map<String,Object> valueMap)

Description copied from interface: QueryApi

Retrieves items by the specified hash key, a range key condition, and a filter expression string.

Specified by:

query in interface QueryApi

filterExpression - filter expression example: "(#a > :a) AND (#c > :c OR #e < :e)"

nameMap - actual values for the attribute-name place holders; can be null if there is no attribute-name placeholder.

valueMap - actual values for the value place holders can be null if there is no attribute-value placeholder.

query

public ItemCollection<QueryOutcome> query(KeyAttribute hashKey,
                                          RangeKeyCondition rangeKeyCondition,
                                          String projectionExpression,
                                          String filterExpression,
                                          Map<String,String> nameMap,
                                          Map<String,Object> valueMap)

Description copied from interface: QueryApi

Retrieves items by the specified hash key, a range key condition, a filter expression and a projection expression.

Specified by:

query in interface QueryApi

projectionExpression - filter expression example: "(#a > :a) AND (#c > :c OR #e < :e)"

filterExpression - projection expression example: "a.b, c[0].e"

nameMap - actual values for the attribute-name place holders; can be null if there is no attribute-name placeholder.

valueMap - actual values for the value place holders can be null if there is no attribute-value placeholder.

query

@Beta
public ItemCollection<QueryOutcome> query(KeyAttribute hashKey,
                                                RangeKeyCondition rangeKeyCondition,
                                                QueryExpressionSpec queryExpressions)

query

public ItemCollection<QueryOutcome> query(QuerySpec spec)

Description copied from interface: QueryApi

Queries table by specifying all the details.

Specified by:

query in interface QueryApi

query

public ItemCollection<QueryOutcome> query(String hashKeyName,
                                          Object hashKeyValue)

Description copied from interface: QueryApi

Retrieves items by the specified hash key.

Specified by:

query in interface QueryApi

query

public ItemCollection<QueryOutcome> query(String hashKeyName,
                                          Object hashKeyValue,
                                          RangeKeyCondition rangeKeyCondition)

Specified by:

query in interface QueryApi

query

public ItemCollection<QueryOutcome> query(String hashKeyName,
                                          Object hashKeyValue,
                                          RangeKeyCondition rangeKeyCondition,
                                          QueryFilter... queryFilters)

Specified by:

query in interface QueryApi

query

public ItemCollection<QueryOutcome> query(String hashKeyName,
                                          Object hashKeyValue,
                                          RangeKeyCondition rangeKeyCondition,
                                          String filterExpression,
                                          Map<String,String> nameMap,
                                          Map<String,Object> valueMap)

Specified by:

query in interface QueryApi

query

public ItemCollection<QueryOutcome> query(String hashKeyName,
                                          Object hashKeyValue,
                                          RangeKeyCondition rangeKeyCondition,
                                          String filterExpression,
                                          String projectionExpression,
                                          Map<String,String> nameMap,
                                          Map<String,Object> valueMap)

Description copied from interface: QueryApi

Retrieves items by the specified hash key, a range key condition, a filter expression and a projection expression.

Specified by:

query in interface QueryApi

filterExpression - filter expression example: "(#a > :a) AND (#c > :c OR #e < :e)"

projectionExpression - projection expression example: "a.b, c[0].e"

nameMap - actual values for the attribute-name place holders; can be null if there is no attribute-name placeholder.

valueMap - actual values for the value place holders can be null if there is no attribute-value placeholder.

query

public ItemCollection<QueryOutcome> query(KeyAttribute hashKey)

Description copied from interface: QueryApi

Retrieves items by the specified hash key.

Specified by:

query in interface QueryApi

updateGSI

public TableDescription updateGSI(ProvisionedThroughput provisionedThroughput)

Updates the provisioned throughput for this global secondary index (GSI). Setting the throughput for an index helps you manage performance and is part of the provisioned throughput feature of DynamoDB.

The provisioned throughput values can be upgraded or downgraded based on the maximums and minimums listed in the Limits section in the Amazon DynamoDB Developer Guide.

This index must be a global secondary index and in the ACTIVE state for this operation to succeed. Updating a GSI is an asynchronous operation; while executing the operation, the index is in the UPDATING state. While the index is in the UPDATING state, the index still has the provisioned throughput from before the call. The new provisioned throughput setting is in effect only when the index returns to the ACTIVE state after the update is complete.

Parameters:

provisionedThroughput - target provisioned throughput

Returns:

the updated table description returned from DynamoDB.

deleteGSI

public TableDescription deleteGSI()

Deletes this global secondary index (GSI) from the DynamoDB table. Involves network calls.

This index must be a global secondary index and in the ACTIVE state for this operation to succeed. Deleting a GSI is an asynchronous operation; while executing the operation, the index is in the DELETING state.

Returns:

the updated table description returned from DynamoDB.

waitForActive

public TableDescription waitForActive()
                               throws InterruptedException

A convenient blocking call that can be used, typically during index creation, to wait for the index to become active by polling the table every 5 seconds.

Currently online index creation is only supported for Global Secondary Index (GSI). Calling this method on a Local Secondary Index (LSI) would result in IllegalArgumentException.

Returns:

the table description when the index has become active

Throws:

IllegalArgumentException - if the table is being deleted, or if the GSI is not being created or updated, or if the GSI doesn't exist

ResourceNotFoundException - if the table doesn't exist

InterruptedException

waitForDelete

public TableDescription waitForDelete()
                               throws InterruptedException

A convenient blocking call that can be used, typically during index deletion on an active table, to wait for the index to become deleted by polling the table every 5 seconds.

Currently online index deletion is only supported for Global Secondary Index (GSI). The behavior of calling this method on a Local Secondary Index (LSI) would result in returning the latest table description.

Returns:

the table description if this GSI has been deleted; or null if the underlying table has been deleted.

Throws:

IllegalArgumentException - if the table is being deleted, or if the GSI is not being deleted.

ResourceNotFoundException - if the table doesn't exist

InterruptedException

waitForActiveOrDelete

public TableDescription waitForActiveOrDelete()
                                       throws InterruptedException

A convenient blocking call that can be used to wait on an index until it has either become active or deleted (ie no longer exists) by polling the table every 5 seconds.

Currently online index creation/deletion is only supported for Global Secondary Index (GSI). The behavior of calling this method on a Local Secondary Index (LSI) would result in returning the latest table description.

Returns:

the table description when the index has become either active or deleted

Throws:

IllegalArgumentException - if the table is being deleted

ResourceNotFoundException - if the table doesn't exist

InterruptedException

scan

public ItemCollection<ScanOutcome> scan(ScanFilter... scanFilters)

Description copied from interface: ScanApi

Retrieves items by the specified list of scan filters.

Specified by:

scan in interface ScanApi

scan

public ItemCollection<ScanOutcome> scan(String filterExpression,
                                        Map<String,String> nameMap,
                                        Map<String,Object> valueMap)

Description copied from interface: ScanApi

Scans table using a Filter Expression.

Specified by:

scan in interface ScanApi

Parameters:

filterExpression - condition expression example: "(#a > :a) AND (#c > :c OR #e < :e)"

nameMap - actual values for the attribute-name place holders; can be null if there is no attribute-name placeholder.

valueMap - actual values for the value place holders can be null if there is no attribute-value placeholder.

scan

public ItemCollection<ScanOutcome> scan(String filterExpression,
                                        String projectionExpression,
                                        Map<String,String> nameMap,
                                        Map<String,Object> valueMap)

Description copied from interface: ScanApi

Scans table using a Filter Expression and a Projection Expression.

Specified by:

scan in interface ScanApi

Parameters:

filterExpression - condition expression example: "(#a > :a) AND (#c > :c OR #e < :e)"

projectionExpression - projection expression example: "a.b , c[0].e"

nameMap - actual values for the attribute-name place holders; can be null if there is no attribute-name placeholder.

valueMap - actual values for the value place holders can be null if there is no attribute-value placeholder.

scan

@Beta
public ItemCollection<ScanOutcome> scan(ScanExpressionSpec xspec)

scan

public ItemCollection<ScanOutcome> scan(ScanSpec params)

Description copied from interface: ScanApi

Scans table by specifying all the details.

Specified by:

scan in interface ScanApi