Log4jLayoutToLogback (rewrite-logging-frameworks 0.10.0 API)

java.lang.Object
- org.openrewrite.Recipe
- - org.openrewrite.java.logging.logback.Log4jLayoutToLogback

```
public class Log4jLayoutToLogback
extends org.openrewrite.Recipe
```
Log4jLayoutToLogback.Log4jLayoutToLogbackVisitor operates on the following assumptions:
- A logback-classic layout must extend the LayoutBase<ILoggingEvent> class.
- log4j's format() is renamed to doLayout() in a logback-classic layout.
- LoggingEvent getRenderedMessage() is converted to LoggingEvent getMessage().
- The log4j ignoresThrowable() method is not needed and has no equivalent in logback-classic.
- The activateOptions() method merits further discussion. In log4j, a layout will have its activateOptions() method invoked by log4j configurators, that is PropertyConfigurator or DOMConfigurator just after all the options of the layout have been set. Thus, the layout will have an opportunity to check that its options are coherent and if so, proceed to fully initialize itself.
- In logback-classic, layouts must implement the LifeCycle interface which includes a method called start(). The start() method is the equivalent of log4j's activateOptions() method.
See Also:

Migration from log4j

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class Log4jLayoutToLogback.Log4jLayoutToLogbackVisitor

Field Summary
- Fields inherited from class org.openrewrite.Recipe
  NOOP, PANIC

Constructor Summary

Constructors
Constructor Description

Log4jLayoutToLogback()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`getDescription()`
`java.lang.String`	`getDisplayName()`
`protected org.openrewrite.TreeVisitor<?,org.openrewrite.ExecutionContext>`	`getSingleSourceApplicableTest()`
`protected org.openrewrite.TreeVisitor<?,org.openrewrite.ExecutionContext>`	`getVisitor()`

Methods inherited from class org.openrewrite.Recipe
causesAnotherCycle, doNext, equals, getApplicableTest, getDescriptor, getEstimatedEffortPerOccurrence, getJacksonPolymorphicTypeTag, getLanguages, getName, getRecipeList, getTags, hashCode, run, run, run, run, validate, validate, validateAll, validateAll, visit

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Log4jLayoutToLogback
```
public Log4jLayoutToLogback()
```
- Method Detail
  - getDisplayName
```
public java.lang.String getDisplayName()
```
    Specified by:
    
    getDisplayName in class org.openrewrite.Recipe
  - getDescription
```
public java.lang.String getDescription()
```
    Overrides:
    
    getDescription in class org.openrewrite.Recipe
  - getSingleSourceApplicableTest
```
protected org.openrewrite.TreeVisitor<?,org.openrewrite.ExecutionContext> getSingleSourceApplicableTest()
```
    Overrides:
    
    getSingleSourceApplicableTest in class org.openrewrite.Recipe
  - getVisitor
```
protected org.openrewrite.TreeVisitor<?,org.openrewrite.ExecutionContext> getVisitor()
```
    Overrides:
    
    getVisitor in class org.openrewrite.Recipe