org.apache.log4j.spi
Class LocationInfo

java.lang.Object
  org.apache.log4j.spi.LocationInfo

All Implemented Interfaces:

Serializable

public class LocationInfo
extends Object
implements Serializable

The internal representation of caller location information.

Since:

0.8.3

See Also:

Serialized Form

Field Summary

String	fullInfo All available caller information, in the format fully.qualified.classname.of.caller.methodName(Filename.java:line)
static String	NA When location information is not available the constant NA is returned.

Constructor Summary

LocationInfo(Throwable t, String fqnOfCallingClass)
Instantiate location information based on a Throwable.

Method Summary

String	getClassName() Return the fully qualified class name of the caller making the logging request.
String	getFileName() Return the file name of the caller.
String	getLineNumber() Returns the line number of the caller.
String	getMethodName() Returns the method name of the caller.

Methods inherited from class java.lang.Object

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

Field Detail

fullInfo

public String fullInfo

All available caller information, in the format fully.qualified.classname.of.caller.methodName(Filename.java:line)

NA

public static final String NA

When location information is not available the constant NA is returned. Current value of this string constant is ?.

See Also:

Constant Field Values

Constructor Detail

LocationInfo

public LocationInfo(Throwable t,
                    String fqnOfCallingClass)

Instantiate location information based on a Throwable. We expect the Throwable t, to be in the format

        java.lang.Throwable
        ...
          at org.apache.log4j.PatternLayout.format(PatternLayout.java:413)
          at org.apache.log4j.FileAppender.doAppend(FileAppender.java:183)
        at org.apache.log4j.Category.callAppenders(Category.java:131)
        at org.apache.log4j.Category.log(Category.java:512)
        at callers.fully.qualified.className.methodName(FileName.java:74)
        ...
       

However, we can also deal with JIT compilers that "lose" the location information, especially between the parentheses.

Method Detail

getClassName

public String getClassName()

Return the fully qualified class name of the caller making the logging request.

getFileName

public String getFileName()

Return the file name of the caller.

This information is not always available.

getLineNumber

public String getLineNumber()

Returns the line number of the caller.

This information is not always available.

getMethodName

public String getMethodName()

Returns the method name of the caller.