com.neurosys.etl.common.transformers

Class LogTransformer

java.lang.Object

com.neurosys.etl.common.transformers.LogTransformer

All Implemented Interfaces:

Lookup, FunctionTransformer, Function, org.apache.commons.collections.Predicate, org.apache.commons.collections.Transformer

public class LogTransformer
extends Object
implements FunctionTransformer, Lookup, org.apache.commons.collections.Predicate

Log the input to the logger and return the input unchanged.
Useful for debugging or intercepting Transformer, Lookup flows and Chains

If Logger.isDebugEnabled() then log will happen @ debug level or @ info level. Throwable objects go into Error level

If no logger is assigned then it will use the default class Logger

Author:

Arjun Dhar

Constructor Summary

Constructors

Constructor and Description
LogTransformer()
LogTransformer(org.slf4j.Logger log)

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(Object input)
org.slf4j.Logger	getLog()
String	getLogStringTemplate() A Template that allows using String.format, use %s to denote actual log substitution
void	init()
void	setLog(org.slf4j.Logger log)
void	setLogStringTemplate(String logStringTemplate) A Template that allows using String.format, use %s to denote actual log substitution
Object	transform(Object input) For a Given String, Lookup a value for it

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.neurosys.etl.common.transformers.FunctionTransformer

apply

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Constructor Detail

LogTransformer

public LogTransformer()

LogTransformer

public LogTransformer(org.slf4j.Logger log)

Method Detail

init

@PostConstruct
public void init()

transform

public Object transform(Object input)

Description copied from interface: Lookup

For a Given String, Lookup a value for it

Specified by:

transform in interface Lookup

Specified by:

transform in interface org.apache.commons.collections.Transformer

getLog

public org.slf4j.Logger getLog()

setLog

public void setLog(org.slf4j.Logger log)

getLogStringTemplate

public String getLogStringTemplate()

A Template that allows using String.format, use %s to denote actual log substitution

Default value:

%s

setLogStringTemplate

public void setLogStringTemplate(String logStringTemplate)

A Template that allows using String.format, use %s to denote actual log substitution

Default value:

%s

evaluate

public boolean evaluate(Object input)

Specified by:

evaluate in interface org.apache.commons.collections.Predicate