org.apache.gora.dynamodb.query
Class DynamoDBQuery<K,T extends org.apache.gora.persistency.Persistent>

java.lang.Object
  org.apache.gora.query.ws.impl.QueryWSBase<K,T>
      org.apache.gora.dynamodb.query.DynamoDBQuery<K,T>

All Implemented Interfaces:

org.apache.gora.query.Query<K,T>

public class DynamoDBQuery<K,T extends org.apache.gora.persistency.Persistent>
extends org.apache.gora.query.ws.impl.QueryWSBase<K,T>

Field Summary

static org.slf4j.Logger	LOG Helper to write useful information into the logs
static String	RANGE_QUERY Range query type property
static String	SCAN_QUERY Scan query type property

Fields inherited from class org.apache.gora.query.ws.impl.QueryWSBase

dataStore, endKey, endTime, fields, filter, isCompiled, limit, queryString, startKey, startTime

Constructor Summary

DynamoDBQuery()
Default Constructor

DynamoDBQuery(org.apache.gora.store.DataStore<K,T> dataStore)
Constructor

Method Summary

void	buildExpression() Builds query expression depending on query type (range or scan)
void	buildQueryExpression(com.amazonaws.services.dynamodb.model.Condition pNewCondition, com.amazonaws.services.dynamodb.model.AttributeValue pHashAttrValue) Builds range query expression
void	buildScanExpression(com.amazonaws.services.dynamodb.model.AttributeValue pHashAttrValue) Builds scan query expression using a hash attribute value where to start
boolean	getConsistencyReadLevel() Gets read consistency level
K	getKey() Gets hash key
com.amazonaws.services.dynamodb.model.KeySchema	getKeySchema() Gets key schema
org.apache.gora.query.Query<K,T>	getQuery() Gets query performed
Object	getQueryExpression() Gets query expression for query
static com.amazonaws.services.dynamodb.model.ComparisonOperator	getRangeCompOp() Gets range query comparator operator
static com.amazonaws.services.dynamodb.model.ComparisonOperator	getScanCompOp() Gets scan comparator operator
static String	getType() Gets query type
void	setConsistencyReadLevel(boolean pConsistencyReadLevel) Sets read consistency level
void	setKey(K key) Sets hash key
void	setKeySchema(com.amazonaws.services.dynamodb.model.KeySchema pKeySchema) Sets query key schema used for queying
void	setQuery(org.apache.gora.query.Query<K,T> pQuery) Sets query to be performed
static void	setRangeCompOp(com.amazonaws.services.dynamodb.model.ComparisonOperator pRangeCompOp) Sets range query comparator operator
static void	setScanCompOp(com.amazonaws.services.dynamodb.model.ComparisonOperator scanCompOp) Sets scan query comparator operator
static void	setType(String pType) Sets query type

Methods inherited from class org.apache.gora.query.ws.impl.QueryWSBase

equals, execute, getConf, getDataStore, getEndKey, getEndTime, getFields, getLimit, getStartKey, getStartTime, getTimestamp, hashCode, setConf, setDataStore, setEndKey, setEndTime, setFields, setKeyRange, setLimit, setStartKey, setStartTime, setTimeRange, setTimestamp, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

LOG

public static final org.slf4j.Logger LOG

Helper to write useful information into the logs

RANGE_QUERY

public static final String RANGE_QUERY

Range query type property

See Also:

Constant Field Values

SCAN_QUERY

public static final String SCAN_QUERY

Scan query type property

See Also:

Constant Field Values

Constructor Detail

DynamoDBQuery

public DynamoDBQuery()

Default Constructor

DynamoDBQuery

public DynamoDBQuery(org.apache.gora.store.DataStore<K,T> dataStore)

Constructor

Parameters:

dataStore -

Method Detail

setKey

public void setKey(K key)

Sets hash key

Specified by:

setKey in interface org.apache.gora.query.Query<K,T extends org.apache.gora.persistency.Persistent>

Overrides:

setKey in class org.apache.gora.query.ws.impl.QueryWSBase<K,T extends org.apache.gora.persistency.Persistent>

getKey

public K getKey()

Gets hash key

Specified by:

getKey in interface org.apache.gora.query.Query<K,T extends org.apache.gora.persistency.Persistent>

Overrides:

getKey in class org.apache.gora.query.ws.impl.QueryWSBase<K,T extends org.apache.gora.persistency.Persistent>

buildExpression

public void buildExpression()

Builds query expression depending on query type (range or scan)

buildScanExpression

public void buildScanExpression(com.amazonaws.services.dynamodb.model.AttributeValue pHashAttrValue)

Builds scan query expression using a hash attribute value where to start

Parameters:

pHashAttrValueHash - attribute value where to start scanning

buildQueryExpression

public void buildQueryExpression(com.amazonaws.services.dynamodb.model.Condition pNewCondition,
                                 com.amazonaws.services.dynamodb.model.AttributeValue pHashAttrValue)

Builds range query expression

Parameters:

pNewConditionCondition - for querying

pHashAttrValueHash - attribute value where to start

getConsistencyReadLevel

public boolean getConsistencyReadLevel()

Gets read consistency level

Returns:

setConsistencyReadLevel

public void setConsistencyReadLevel(boolean pConsistencyReadLevel)

Sets read consistency level

Parameters:

pConsistencyReadLevel -

getKeySchema

public com.amazonaws.services.dynamodb.model.KeySchema getKeySchema()

Gets key schema

Returns:

getQueryExpression

public Object getQueryExpression()

Gets query expression for query

Returns:

setKeySchema

public void setKeySchema(com.amazonaws.services.dynamodb.model.KeySchema pKeySchema)

Sets query key schema used for queying

Parameters:

pKeySchema -

setQuery

public void setQuery(org.apache.gora.query.Query<K,T> pQuery)

Sets query to be performed

Parameters:

pQuery -

getQuery

public org.apache.gora.query.Query<K,T> getQuery()

Gets query performed

Returns:

getType

public static String getType()

Gets query type

Returns:

setType

public static void setType(String pType)

Sets query type

Parameters:

pType -

getScanCompOp

public static com.amazonaws.services.dynamodb.model.ComparisonOperator getScanCompOp()

Gets scan comparator operator

Returns:

setScanCompOp

public static void setScanCompOp(com.amazonaws.services.dynamodb.model.ComparisonOperator scanCompOp)

Sets scan query comparator operator

Parameters:

scanCompOp -

getRangeCompOp

public static com.amazonaws.services.dynamodb.model.ComparisonOperator getRangeCompOp()

Gets range query comparator operator

Returns:

setRangeCompOp

public static void setRangeCompOp(com.amazonaws.services.dynamodb.model.ComparisonOperator pRangeCompOp)

Sets range query comparator operator

Parameters:

pRangeCompOp -