Package io.jmix.gridexportflowui.exporter.entitiesloader

Class LimitOffsetAllEntitiesLoader

java.lang.Object

io.jmix.gridexportflowui.exporter.entitiesloader.AbstractAllEntitiesLoader

io.jmix.gridexportflowui.exporter.entitiesloader.LimitOffsetAllEntitiesLoader

All Implemented Interfaces:

AllEntitiesLoader

@Component
public class LimitOffsetAllEntitiesLoader
extends AbstractAllEntitiesLoader

This loader implements limit-offset pagination strategy. Entities are fetched in the same order as in the data store. The strategy uses two parameters. The first, offset, sets a number of the starting record of the page. The second, limit, defines the number of records in the page.

Nested Class Summary

Nested classes/interfaces inherited from interface io.jmix.gridexportflowui.exporter.entitiesloader.AllEntitiesLoader

AllEntitiesLoader.ExportedEntityVisitor

Field Summary

Fields

Modifier and Type	Field	Description
static final String	PAGINATION_STRATEGY

Fields inherited from class io.jmix.gridexportflowui.exporter.entitiesloader.AbstractAllEntitiesLoader

dataManager, gridExportProperties, metadataTools, platformTransactionManager

Constructor Summary

Constructors

Constructor	Description
LimitOffsetAllEntitiesLoader(MetadataTools metadataTools, DataManager dataManager, org.springframework.transaction.PlatformTransactionManager platformTransactionManager, GridExportProperties gridExportProperties)

Method Summary

Modifier and Type	Method	Description
protected LoadContext	generateLoadContext(CollectionLoader loader)
String	getPaginationStrategy()	Type of data loading strategy defined as string constant.
protected void	loadEntities(CollectionLoader<?> collectionLoader, AllEntitiesLoader.ExportedEntityVisitor exportedEntityVisitor, int loadBatchSize)	Sequential data loading

Methods inherited from class io.jmix.gridexportflowui.exporter.entitiesloader.AbstractAllEntitiesLoader

getDataLoader, getValueLoadContextQuery, loadAll, loadKeyValueEntities

Methods inherited from class java.lang.Object

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

Field Details

PAGINATION_STRATEGY

public static final String PAGINATION_STRATEGY

See Also:

• Constant Field Values

Constructor Details

LimitOffsetAllEntitiesLoader

public LimitOffsetAllEntitiesLoader(MetadataTools metadataTools,
 DataManager dataManager,
 org.springframework.transaction.PlatformTransactionManager platformTransactionManager,
 GridExportProperties gridExportProperties)

Method Details

getPaginationStrategy

public String getPaginationStrategy()

Description copied from interface: AllEntitiesLoader

Type of data loading strategy defined as string constant. AllEntitiesLoaderFactory.getEntitiesLoader() returns loader which pagination strategy equals to GridExportProperties.getExportAllPaginationStrategy()

generateLoadContext

protected LoadContext generateLoadContext(CollectionLoader loader)

Specified by:

generateLoadContext in class AbstractAllEntitiesLoader

loadEntities

protected void loadEntities(CollectionLoader<?> collectionLoader,
 AllEntitiesLoader.ExportedEntityVisitor exportedEntityVisitor,
 int loadBatchSize)

Sequential data loading

Specified by:

loadEntities in class AbstractAllEntitiesLoader

Parameters:

exportedEntityVisitor - AllEntitiesLoader.ExportedEntityVisitor.visitEntity(EntityExportContext)

loadBatchSize - GridExportProperties.getExportAllBatchSize() number of entities loaded in one query