com.devexperts.qd

Class QDFactory

java.lang.Object

com.devexperts.qd.QDFactory

public abstract class QDFactory
extends Object

The QDFactory creates implementations for core QD components.

Constructor Summary

Constructors

Constructor and Description
QDFactory()

Method Summary

Modifier and Type	Method and Description
abstract QDCollector.Builder<?>	collectorBuilder(QDContract contract) Creates builder for an collector that has specified contract.
static DataScheme	createDefaultScheme(ClassLoader loader) Creates default data scheme for a specified class loader.
QDHistory	createHistory(DataScheme scheme) Deprecated. use historyBuilder() instead.
QDHistory	createHistory(DataScheme scheme, QDStats stats) Deprecated. use historyBuilder() instead.
QDHistory	createHistory(DataScheme scheme, QDStats stats, HistorySubscriptionFilter historyFilter) Deprecated. use historyBuilder() instead.
static QDStats	createStats(QDStats.SType type, DataScheme scheme) Creates default implementation of QDStats with the specified type and scheme.
QDStream	createStream(DataScheme scheme) Deprecated. use streamBuilder() instead.
QDStream	createStream(DataScheme scheme, QDStats stats) Deprecated. use streamBuilder() instead.
QDTicker	createTicker(DataScheme scheme) Deprecated. use tickerBuilder() instead.
QDTicker	createTicker(DataScheme scheme, QDStats stats) Deprecated. use tickerBuilder() instead.
QDAgent.Builder	createVoidAgentBuilder(QDContract contract, DataScheme scheme) Creates builder for an agent that is not tied to any particular collector, has no data, and only keeps track of added and remove subscription.
static QDFactory	getDefaultFactory() Returns default QD factory.
static DataScheme	getDefaultScheme() Returns default data scheme for a system class loader.
static String	getVersion() Returns string description of this QDS version.
QDCollector.Builder<QDHistory>	historyBuilder()
static void	setVersion(String version) Overwrites string description of this QDS version for testing purposes only.
static void	showVersion() Shows QDS version in the log (at most once).
QDCollector.Builder<QDStream>	streamBuilder()
QDCollector.Builder<QDTicker>	tickerBuilder()

Methods inherited from class java.lang.Object

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

Constructor Detail

QDFactory

public QDFactory()

Method Detail

collectorBuilder

public abstract QDCollector.Builder<?> collectorBuilder(QDContract contract)

Creates builder for an collector that has specified contract.

Parameters:

contract - the contract of the collector.

tickerBuilder

public final QDCollector.Builder<QDTicker> tickerBuilder()

streamBuilder

public final QDCollector.Builder<QDStream> streamBuilder()

historyBuilder

public final QDCollector.Builder<QDHistory> historyBuilder()

createTicker

public final QDTicker createTicker(DataScheme scheme)

Deprecated. use tickerBuilder() instead.

Creates implementation of ticker-view for specified data scheme with default statistics gathering delegate.

createStream

public final QDStream createStream(DataScheme scheme)

Deprecated. use streamBuilder() instead.

Creates implementation of stream-view for specified data scheme with default statistics gathering delegate.

createHistory

public final QDHistory createHistory(DataScheme scheme)

Deprecated. use historyBuilder() instead.

Creates implementation of history-view for specified data scheme with default statistics gathering delegate.

createTicker

public final QDTicker createTicker(DataScheme scheme,
                                   QDStats stats)

Deprecated. use tickerBuilder() instead.

Creates implementation of ticker-view for specified data scheme and a specified statistics gathering delegate.

createStream

public final QDStream createStream(DataScheme scheme,
                                   QDStats stats)

Deprecated. use streamBuilder() instead.

Creates implementation of stream-view for specified data scheme and a specified statistics gathering delegate.

createHistory

public final QDHistory createHistory(DataScheme scheme,
                                     QDStats stats)

Deprecated. use historyBuilder() instead.

Creates implementation of history-view for specified data scheme and a specified statistics gathering delegate, using default filter.

createHistory

public final QDHistory createHistory(DataScheme scheme,
                                     QDStats stats,
                                     HistorySubscriptionFilter historyFilter)

Deprecated. use historyBuilder() instead.

Creates implementation of history-view for specified data scheme, a specified statistics gathering delegate, and a filter.

createVoidAgentBuilder

public QDAgent.Builder createVoidAgentBuilder(QDContract contract,
                                              DataScheme scheme)

Creates builder for an agent that is not tied to any particular collector, has no data, and only keeps track of added and remove subscription.

Parameters:

contract - the contract of the agent.

scheme - the data scheme.

showVersion

public static void showVersion()

Shows QDS version in the log (at most once).

createDefaultScheme

public static DataScheme createDefaultScheme(ClassLoader loader)

Creates default data scheme for a specified class loader. loader may be null to specify default class loader. In this case "scheme" system property is checked for an implementation class name or jar file first. If "scheme" system property value starts with "ext:" prefix, try to load DataSchemeFactory via Services.createServices(Class, ClassLoader). The scheme is loaded via Services.createService(DataScheme.class, loader, scheme), where scheme is the value of "scheme" system property or null.

Throws:

IllegalArgumentException - if default scheme is not found.

createStats

public static QDStats createStats(QDStats.SType type,
                                  DataScheme scheme)

Creates default implementation of QDStats with the specified type and scheme. Scheme may be null if per-record information is not required.

getVersion

public static String getVersion()

Returns string description of this QDS version.

setVersion

public static void setVersion(String version)

Overwrites string description of this QDS version for testing purposes only.

Parameters:

version - version string to set. Use null to restore to default value.

getDefaultFactory

public static QDFactory getDefaultFactory()

Returns default QD factory.

getDefaultScheme

public static DataScheme getDefaultScheme()

Returns default data scheme for a system class loader.

See Also:

createDefaultScheme(ClassLoader)