io.continual.services.processor.engine.library.util

Class SimpleMessageProcessingContext

java.lang.Object

io.continual.services.processor.engine.library.util.SimpleMessageProcessingContext

All Implemented Interfaces:

MessageProcessingContext

public class SimpleMessageProcessingContext
extends Object
implements MessageProcessingContext

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SimpleMessageProcessingContext.Builder

Method Summary

Modifier and Type	Method and Description
static SimpleMessageProcessingContext.Builder	builder()
<T> T	evalExpression(String expression, Class<T> targetClass, io.continual.util.data.exprEval.ExprDataSource... addl) Evaluate a ${} expression in the message context, which includes the addl srcs, the message, then the stream processing context, in that order.
String	getId() Get a unique serial number for the current message
Message	getMessage() Get the message being processed
MetricsCatalog	getMetrics() Get a metrics catalog appropriate for the scope of this message's processing
Sink	getSink(String sinkName) Get a named sink from the program
Source	getSource(String sinkName) Get a named source from the program
StreamProcessingContext	getStreamProcessingContext() Get the stream processing context associated with the current message.
boolean	shouldContinue() Should the engine continue to process this message?
void	stopProcessing() Ask the engine to stop processing this message
void	stopProcessing(String warningText) Ask the engine to stop processing this message and log the warning.
void	warn(String warningText) report a warning about processing

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.continual.services.processor.engine.model.MessageProcessingContext

evalExpression, evalExpression

Method Detail

builder

public static SimpleMessageProcessingContext.Builder builder()

getStreamProcessingContext

public StreamProcessingContext getStreamProcessingContext()

Description copied from interface: MessageProcessingContext

Get the stream processing context associated with the current message.

Specified by:

getStreamProcessingContext in interface MessageProcessingContext

Returns:

a stream processing context

getMessage

public Message getMessage()

Description copied from interface: MessageProcessingContext

Get the message being processed

Specified by:

getMessage in interface MessageProcessingContext

Returns:

the message

getId

public String getId()

Description copied from interface: MessageProcessingContext

Get a unique serial number for the current message

Specified by:

getId in interface MessageProcessingContext

Returns:

a serial number

getSource

public Source getSource(String sinkName)

Description copied from interface: MessageProcessingContext

Get a named source from the program

Specified by:

getSource in interface MessageProcessingContext

Parameters:

sinkName - the name of a source

Returns:

a source, or null if none by that name

getSink

public Sink getSink(String sinkName)

Description copied from interface: MessageProcessingContext

Get a named sink from the program

Specified by:

getSink in interface MessageProcessingContext

Returns:

a sink, or null if none by that name

shouldContinue

public boolean shouldContinue()

Description copied from interface: MessageProcessingContext

Should the engine continue to process this message?

Specified by:

shouldContinue in interface MessageProcessingContext

Returns:

normally true, false if stopProcessing or stream context's fail has been called

stopProcessing

public void stopProcessing()

Description copied from interface: MessageProcessingContext

Ask the engine to stop processing this message

Specified by:

stopProcessing in interface MessageProcessingContext

stopProcessing

public void stopProcessing(String warningText)

Description copied from interface: MessageProcessingContext

Ask the engine to stop processing this message and log the warning.

Specified by:

stopProcessing in interface MessageProcessingContext

warn

public void warn(String warningText)

Description copied from interface: MessageProcessingContext

report a warning about processing

Specified by:

warn in interface MessageProcessingContext

evalExpression

public <T> T evalExpression(String expression,
                            Class<T> targetClass,
                            io.continual.util.data.exprEval.ExprDataSource... addl)

Description copied from interface: MessageProcessingContext

Evaluate a ${} expression in the message context, which includes the addl srcs, the message, then the stream processing context, in that order.

Specified by:

evalExpression in interface MessageProcessingContext

Returns:

a value, which may be an empty string

getMetrics

public MetricsCatalog getMetrics()

Description copied from interface: MessageProcessingContext

Get a metrics catalog appropriate for the scope of this message's processing

Specified by:

getMetrics in interface MessageProcessingContext

Returns: