org.apache.openjpa.slice.jdbc
Class DistributedStoreQuery.ParallelExecutor

java.lang.Object
  org.apache.openjpa.kernel.AbstractStoreQuery.AbstractExecutor
      org.apache.openjpa.kernel.ExpressionStoreQuery.AbstractExpressionExecutor
          org.apache.openjpa.kernel.ExpressionStoreQuery.DataStoreExecutor
              org.apache.openjpa.slice.jdbc.DistributedStoreQuery.ParallelExecutor

All Implemented Interfaces:

Serializable, StoreQuery.Executor

Enclosing class:

DistributedStoreQuery

public static class DistributedStoreQuery.ParallelExecutor
extends ExpressionStoreQuery.DataStoreExecutor

Executes queries on multiple databases.

Author:

Pinaki Poddar

See Also:

Serialized Form

Constructor Summary

DistributedStoreQuery.ParallelExecutor(DistributedStoreQuery dsq, ClassMetaData meta, boolean subclasses, ExpressionParser parser, Object parsed, boolean parallel)

Method Summary

void	addExecutor(StoreQuery.Executor ex)
(package private) boolean	containsReplicated(QueryContext query) Scans metadata to find out if a replicated class is the candidate.
Number	executeDelete(StoreQuery q, Object[] params) Deleted the objects that result from the execution of the query, retuning the number of objects that were deleted.
ResultObjectProvider	executeQuery(StoreQuery q, Object[] params, StoreQuery.Range range) Each child query must be executed with slice context and not the given query context.
Number	executeUpdate(StoreQuery q, Object[] params) Updates the objects that result from the execution of the query, retuning the number of objects that were updated.
(package private) List<SliceStoreManager>	findTargets()

Methods inherited from class org.apache.openjpa.kernel.ExpressionStoreQuery.DataStoreExecutor

getDataStoreActions, getOrderingValue, getProjectionTypes, getQueryExpressions

Methods inherited from class org.apache.openjpa.kernel.ExpressionStoreQuery.AbstractExpressionExecutor

assertNotContainer, getAccessPathMetaDatas, getAlias, getAscending, getOperation, getOrderedParameterTypes, getProjectionAliases, getRange, getResultClass, getResultShape, getUpdates, hasGrouping, isAggregate, isDistinct, isPacking, toParameterArray, validate

Methods inherited from class org.apache.openjpa.kernel.AbstractStoreQuery.AbstractExecutor

getParameterTypes

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.kernel.StoreQuery.Executor

getAccessPathMetaDatas, getAlias, getAscending, getOperation, getOrderedParameterTypes, getParameterTypes, getProjectionAliases, getRange, getResultClass, getResultShape, getUpdates, hasGrouping, isAggregate, isDistinct, isPacking, toParameterArray, validate

Constructor Detail

DistributedStoreQuery.ParallelExecutor

public DistributedStoreQuery.ParallelExecutor(DistributedStoreQuery dsq,
                                              ClassMetaData meta,
                                              boolean subclasses,
                                              ExpressionParser parser,
                                              Object parsed,
                                              boolean parallel)

Method Detail

addExecutor

public void addExecutor(StoreQuery.Executor ex)

executeQuery

public ResultObjectProvider executeQuery(StoreQuery q,
                                         Object[] params,
                                         StoreQuery.Range range)

Each child query must be executed with slice context and not the given query context.

Specified by:

executeQuery in interface StoreQuery.Executor

Overrides:

executeQuery in class ExpressionStoreQuery.DataStoreExecutor

See Also:

StoreQuery.Executor.isPacking(org.apache.openjpa.kernel.StoreQuery)

containsReplicated

boolean containsReplicated(QueryContext query)

Scans metadata to find out if a replicated class is the candidate.

executeDelete

public Number executeDelete(StoreQuery q,
                            Object[] params)

Description copied from interface: StoreQuery.Executor

Deleted the objects that result from the execution of the query, retuning the number of objects that were deleted.

Specified by:

executeDelete in interface StoreQuery.Executor

Overrides:

executeDelete in class ExpressionStoreQuery.DataStoreExecutor

executeUpdate

public Number executeUpdate(StoreQuery q,
                            Object[] params)

Description copied from interface: StoreQuery.Executor

Updates the objects that result from the execution of the query, retuning the number of objects that were updated.

Specified by:

executeUpdate in interface StoreQuery.Executor

Overrides:

executeUpdate in class ExpressionStoreQuery.DataStoreExecutor

findTargets

List<SliceStoreManager> findTargets()