Package com.inductiveautomation.perspective.gateway.model

Class AbstractBindingHarness

java.lang.Object

com.inductiveautomation.perspective.gateway.model.AbstractBindingHarness

All Implemented Interfaces:

AuditingContext, BindingContext, LoggingContext

Direct Known Subclasses:

ElementBindingHarness

public abstract class AbstractBindingHarness
extends java.lang.Object
implements BindingContext

Wraps up the logic of creating bindings and transform chains, and linking up the values as they get created, eventually making their way back onto the target property.

Field Summary

Fields

Modifier and Type	Field	Description
protected Binding	binding
protected boolean	shutdown
protected PerspectiveElement	targetComponent
protected PropertyKey	targetProperty
protected Transform[]	transforms	List of transforms or null if no transforms (never empty)
protected java.lang.String	typeCode

Method Summary

Modifier and Type	Method	Description
AuditContext.Builder	getAuditSnapshot()
QualifiedValue	getLastValue()
LoggerEx	getLogger()
LoggingContext	getMdcParent()
PerspectiveElement	getTargetElement()
PropertyKey	getTargetProperty()
void	mdcSetup()	Set up the MDC keys for this context
void	mdcTeardown()	Tear down the MDC keys that are added in #mdcSetup
protected void	onBindingProducedValue(long sequence, QualifiedValue value)
protected void	onTransformProducedValue(int transformIndex, long sequence, QualifiedValue transformedValue)
void	processPublishedValue()	Takes the most recently published value from the binding and runs it through the transforms or delivers it to the target if there are no transforms.
void	publish(QualifiedValue value, boolean pending)	Called from the binding when it has a value to push onto the target property ( or through its transforms )
void	refresh()
void	shutdown()	Must be called on-queue
void	startup()	Must be called on-queue
protected abstract java.lang.Runnable	subscribeToTarget(java.util.function.Consumer<PropertyTreeChangeEvent> callback)	Attempt to subscribe to the target property.
protected abstract void	writeToTarget(QualifiedValue value)	Write the given value to the target property.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.inductiveautomation.perspective.gateway.api.AuditingContext

audit

Methods inherited from interface com.inductiveautomation.perspective.gateway.api.BindingContext

getAuditProfile, getExecutorService, getScheduler, getSession, publish

Methods inherited from interface com.inductiveautomation.perspective.gateway.api.LoggingContext

mdc, mdcSetupTree, mdcTeardownTree, mdcWrap

Field Detail

typeCode

protected final java.lang.String typeCode

binding

protected final Binding binding

targetComponent

protected final PerspectiveElement targetComponent

targetProperty

protected final PropertyKey targetProperty

transforms

@Nullable
protected final Transform[] transforms

List of transforms or null if no transforms (never empty)

shutdown

protected boolean shutdown

Method Detail

getTargetElement

public PerspectiveElement getTargetElement()

Specified by:

getTargetElement in interface BindingContext

getLogger

public LoggerEx getLogger()

Specified by:

getLogger in interface LoggingContext

getMdcParent

@Nullable
public LoggingContext getMdcParent()

Specified by:

getMdcParent in interface LoggingContext

mdcSetup

public void mdcSetup()

Description copied from interface: LoggingContext

Set up the MDC keys for this context

Specified by:

mdcSetup in interface LoggingContext

mdcTeardown

public void mdcTeardown()

Description copied from interface: LoggingContext

Tear down the MDC keys that are added in #mdcSetup

Specified by:

mdcTeardown in interface LoggingContext

getTargetProperty

public PropertyKey getTargetProperty()

Specified by:

getTargetProperty in interface BindingContext

startup

public void startup()

Must be called on-queue

subscribeToTarget

@Nullable
protected abstract java.lang.Runnable subscribeToTarget(java.util.function.Consumer<PropertyTreeChangeEvent> callback)

Attempt to subscribe to the target property.

Parameters:

callback - When the target property changes, call this consumer and give it a way to fetch the new value

Returns:

A runnable which when called will tear down the subscription. May be null if the subscription wasn't able to be established.

shutdown

public void shutdown()

Must be called on-queue

publish

public void publish(QualifiedValue value,
                    boolean pending)

Description copied from interface: BindingContext

Called from the binding when it has a value to push onto the target property ( or through its transforms )

Specified by:

publish in interface BindingContext

pending - true if this value is temporary and will be replaced (within a reasonable span of time) with a new value

processPublishedValue

public void processPublishedValue()

Description copied from interface: BindingContext

Takes the most recently published value from the binding and runs it through the transforms or delivers it to the target if there are no transforms.

Specified by:

processPublishedValue in interface BindingContext

getLastValue

public QualifiedValue getLastValue()

Specified by:

getLastValue in interface BindingContext

refresh

public void refresh()

onBindingProducedValue

protected void onBindingProducedValue(long sequence,
                                      QualifiedValue value)

onTransformProducedValue

protected void onTransformProducedValue(int transformIndex,
                                        long sequence,
                                        QualifiedValue transformedValue)

writeToTarget

protected abstract void writeToTarget(QualifiedValue value)

Write the given value to the target property.

getAuditSnapshot

@Nonnull
public AuditContext.Builder getAuditSnapshot()

Specified by:

getAuditSnapshot in interface AuditingContext

Returns:

A new, or extended, AuditContext.Builder, with qualified information about the current scope.