org.datanucleus.store.federation

Class FederatedJDOQLQuery

java.lang.Object

org.datanucleus.store.query.Query

org.datanucleus.store.query.AbstractJavaQuery

org.datanucleus.store.query.AbstractJDOQLQuery

org.datanucleus.store.federation.FederatedJDOQLQuery

All Implemented Interfaces:

Serializable, ExecutionContextListener

public class FederatedJDOQLQuery
extends AbstractJDOQLQuery

JDOQL query that is federated across multiple datastores

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.query.Query

Query.SubqueryDefinition

Field Summary

Fields inherited from class org.datanucleus.store.query.AbstractJavaQuery

candidateCollection, singleString

Fields inherited from class org.datanucleus.store.query.Query

BULK_DELETE, BULK_UPDATE, candidateClass, candidateClassName, clr, compilation, ec, explicitParameters, explicitVariables, EXTENSION_CHECK_UNUSED_PARAMETERS, EXTENSION_COMPILATION_CACHED, EXTENSION_EVALUATE_IN_MEMORY, EXTENSION_FLUSH_BEFORE_EXECUTION, EXTENSION_LOAD_RESULTS_AT_COMMIT, EXTENSION_MULTITHREAD, EXTENSION_RESULT_CACHE_TYPE, EXTENSION_RESULT_SIZE_METHOD, EXTENSION_RESULTS_CACHED, EXTENSION_USE_FETCH_PLAN, extensions, filter, from, fromInclNo, fromInclParam, grouping, having, ignoreCache, implicitParameters, imports, inputParameters, LOCALISER, ordering, OTHER, parameterNames, parsedImports, queryResults, range, result, resultClass, resultClassName, resultDistinct, SELECT, storeMgr, subclasses, subqueries, tasks, toExclNo, toExclParam, type, unique, unmodifiable, update

Constructor Summary

Constructors

Constructor and Description
FederatedJDOQLQuery(StoreManager storeMgr, ExecutionContext ec) Constructs a new query instance that uses the given execution context.
FederatedJDOQLQuery(StoreManager storeMgr, ExecutionContext ec, FederatedJDOQLQuery q) Constructs a new query instance having the same criteria as the given query.
FederatedJDOQLQuery(StoreManager storeMgr, ExecutionContext ec, String query) Constructor for a JDOQL query where the query is specified using the "Single-String" format.

Method Summary

Modifier and Type	Method and Description
protected Object	performExecute(Map parameters) Method to actually execute the query.

Methods inherited from class org.datanucleus.store.query.AbstractJDOQLQuery

compileInternal, compileSubqueries, getLanguage, getQueryCacheKey, getSingleStringQuery, setGrouping, setResult

Methods inherited from class org.datanucleus.store.query.AbstractJavaQuery

dereferenceFilter, discardCompiled, evaluateInMemory, performDeletePersistentAll, setCandidates, setCandidates, toString

Methods inherited from class org.datanucleus.store.query.Query

addExtension, addSubquery, applyImplicitParameterValueToCompilation, applyImplicitParameterValueToSubqueries, assertIsModifiable, assertIsOpen, assertSupportsCancel, cancel, cancel, cancelTaskObject, checkForMissingParameters, checkParameterTypesAgainstCompilation, checkUnusedParameters, close, closeAll, compile, declareExplicitParameters, declareExplicitVariables, declareImports, deepFindSymbolForParameterInCompilation, deletePersistentAll, deletePersistentAll, deletePersistentAll, deregisterTask, equals, execute, executeQuery, executeWithArray, executeWithMap, executionContextClosing, getBooleanExtensionProperty, getCandidateClass, getCandidateClassName, getCompilation, getDatastoreReadTimeoutMillis, getDatastoreWriteTimeoutMillis, getExecutionContext, getExplicitParameters, getExplicitVariables, getExtension, getExtensions, getFetchPlan, getFilter, getFrom, getGrouping, getHaving, getIgnoreCache, getImplicitParameters, getImports, getInputParameters, getNativeQuery, getOrdering, getParameterMapForValues, getParsedImports, getQueryManager, getRange, getRangeFromIncl, getRangeFromInclParam, getRangeToExcl, getRangeToExclParam, getResult, getResultClass, getResultClassName, getResultDistinct, getSerializeRead, getStoreManager, getStringExtensionProperty, getSubqueryForVariable, getSupportedExtensions, getType, getUpdate, hashCode, hasSubqueryForVariable, isCompiled, isSubclasses, isUnique, isUnmodifiable, prepareDatastore, processesRangeInDatastoreQuery, registerTask, resolveClassDeclaration, setCacheResults, setCandidateClass, setCandidateClassName, setCompilation, setDatastoreReadTimeoutMillis, setDatastoreWriteTimeoutMillis, setExtensions, setFetchPlan, setFilter, setFrom, setHaving, setIgnoreCache, setImplicitParameter, setImplicitParameter, setOrdering, setRange, setRange, setResultClass, setResultClassName, setResultDistinct, setResultMetaData, setSerializeRead, setSubclasses, setType, setUnique, setUnmodifiable, setUpdate, shouldReturnSingleRow, supportsTimeout, useCaching, useFetchPlan, useResultsCaching

Methods inherited from class java.lang.Object

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

Constructor Detail

FederatedJDOQLQuery

public FederatedJDOQLQuery(StoreManager storeMgr,
                           ExecutionContext ec)

Constructs a new query instance that uses the given execution context.

Parameters:

storeMgr - StoreManager for this query

ec - execution context

FederatedJDOQLQuery

public FederatedJDOQLQuery(StoreManager storeMgr,
                           ExecutionContext ec,
                           FederatedJDOQLQuery q)

Constructs a new query instance having the same criteria as the given query.

Parameters:

storeMgr - StoreManager for this query

ec - execution context

q - The query from which to copy criteria.

FederatedJDOQLQuery

public FederatedJDOQLQuery(StoreManager storeMgr,
                           ExecutionContext ec,
                           String query)

Constructor for a JDOQL query where the query is specified using the "Single-String" format.

Parameters:

storeMgr - StoreManager for this query

ec - execution context

query - The query string

Method Detail

performExecute

protected Object performExecute(Map parameters)

Description copied from class: Query

Method to actually execute the query. To be implemented by extending classes for the particular query language.

Specified by:

performExecute in class Query

Parameters:

parameters - Map containing the parameters.

Returns:

Query result - QueryResult if SELECT, or Long if BULK_UPDATE, BULK_DELETE