Package org.apache.log4j.chainsaw
Class ChainsawAppender
- java.lang.Object
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- org.apache.log4j.AppenderSkeleton
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- org.apache.log4j.chainsaw.ChainsawAppender
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- All Implemented Interfaces:
org.apache.log4j.Appender
,org.apache.log4j.spi.OptionHandler
public class ChainsawAppender extends org.apache.log4j.AppenderSkeleton
ChainsawAppender receives LoggingEvents from the local Log4J environment, and appends them into a model that can be used inside a Swing GUI- Version:
- 1.0
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Field Summary
Fields Modifier and Type Field Description private org.apache.log4j.Appender
appender
private java.lang.String
application
private java.lang.String
hostname
private static ChainsawAppender
sSharedAppender
The in-JVM singleton instance of the ChainsawAppender.private java.lang.String
viewerClassname
The classname of the viewer to create to view the events.
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Constructor Summary
Constructors Constructor Description ChainsawAppender()
Constructor, initialises the singleton instance of the appender
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
activateOptions()
Instantiates and activates an instance of a ChainsawViewer to view the contents of this appender.protected void
append(org.apache.log4j.spi.LoggingEvent aEvent)
Appends the eventvoid
close()
Close does nothingorg.apache.log4j.Appender
getAppender()
java.lang.String
getApplication()
Returns value of the Application option.(package private) static ChainsawAppender
getInstance()
Return the singleton instance of the ChainsawAppender, it should only be initialised once.java.lang.String
getViewerClass()
Gets the viewer class to use to view the events.boolean
requiresLayout()
This appender does not require layout and so return falsevoid
setAppender(org.apache.log4j.Appender appender)
void
setApplication(java.lang.String lapp)
The Application option takes a string value which should be the name of the application getting loggedvoid
setViewerClass(java.lang.String classname)
Sets the viewer class to use to view the events.
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Field Detail
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appender
private org.apache.log4j.Appender appender
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sSharedAppender
private static ChainsawAppender sSharedAppender
The in-JVM singleton instance of the ChainsawAppender.If somehow Log4j initialises more than one, then the first one to initialise wins!
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viewerClassname
private java.lang.String viewerClassname
The classname of the viewer to create to view the events.
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hostname
private java.lang.String hostname
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application
private java.lang.String application
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Method Detail
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getInstance
static ChainsawAppender getInstance()
Return the singleton instance of the ChainsawAppender, it should only be initialised once.- Returns:
- the One and only instance of the ChainsawAppender that is allowed to be referenced by the GUI
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requiresLayout
public boolean requiresLayout()
This appender does not require layout and so return false- Returns:
- false and only false
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getAppender
public org.apache.log4j.Appender getAppender()
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setAppender
public void setAppender(org.apache.log4j.Appender appender)
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append
protected void append(org.apache.log4j.spi.LoggingEvent aEvent)
Appends the event- Specified by:
append
in classorg.apache.log4j.AppenderSkeleton
- Parameters:
aEvent
- the LoggingEvent to append
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activateOptions
public void activateOptions()
Instantiates and activates an instance of a ChainsawViewer to view the contents of this appender.- Specified by:
activateOptions
in interfaceorg.apache.log4j.spi.OptionHandler
- Overrides:
activateOptions
in classorg.apache.log4j.AppenderSkeleton
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close
public void close()
Close does nothing
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setViewerClass
public void setViewerClass(java.lang.String classname)
Sets the viewer class to use to view the events. The class must implement the ChainsawViewer interface.- Parameters:
classname
- The class name of the viewer class.
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getViewerClass
public java.lang.String getViewerClass()
Gets the viewer class to use to view the events.- Returns:
- The class name of the viewer class.
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setApplication
public void setApplication(java.lang.String lapp)
The Application option takes a string value which should be the name of the application getting logged
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getApplication
public java.lang.String getApplication()
Returns value of the Application option.
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