com.ibm.ism.content.virtual

Class ContentCatalogLogger

java.lang.Object

com.ibm.ism.content.virtual.ContentCatalogLogger

public class ContentCatalogLogger
extends java.lang.Object

ContentCatalogLogger is a thin wrapper over MXLogger that adds some convenience features. These features are

• Parameters for class name and method name
• Parameters for printing the input parameters to a method
• A parameter for printing the output value of a method

ContentCatalogLogger uses the following logging levels, from highest to lowest:

• Fatal
• Error
• Warn
• Info
• Debug

If a particular level is enabled, then messages at that level and all higher levels will go to the log. For any levels not enabled, messages written at those levels will not appear in the log. This allows the user to set the logging to the desired level of verbosity.

The isLEVEL() methods are included to improve performance. Before calling one of the logging methods with parameters that would require string concatenation, object creation, or other expensive operations, the corresponding isLEVEL() call can be made first. For example:

 if (log.isDebug()) {
     log.debug(CLASSNAME, METHOD, "Value " + value + " for key " + key + " is within range.");
 }
 

In the code sample above, calling isDebug() prevents the string concatenation from occuring when the Debug level is not enabled, thus improving performance.

Constructor Summary

Constructors

Constructor and Description
ContentCatalogLogger(MXLogger logger) Creates an ContentCatalogLogger from an MXLogger

Method Summary

Modifier and Type	Method and Description
void	debug(java.lang.String className, java.lang.String method, java.lang.String msg) Writes a message to the log at Debug level.
void	debug(java.lang.String className, java.lang.String method, java.lang.String msg, java.lang.Throwable t) Writes a message to the log at Debug level, along with a Throwable.
void	debugEntry(java.lang.String className, java.lang.String method) Logs the entry to a method that has no input parameters.
void	debugEntry(java.lang.String className, java.lang.String method, java.lang.Object param1) Logs the entry to a method that has one input parameter.
void	debugEntry(java.lang.String className, java.lang.String method, java.lang.Object[] params) Writes a message to the log at Debug level indicating that a new method has just been entered.
void	debugEntry(java.lang.String className, java.lang.String method, java.lang.Object param1, java.lang.Object param2) Logs the entry to a method that has two input parameters.
void	debugEntry(java.lang.String className, java.lang.String method, java.lang.Object param1, java.lang.Object param2, java.lang.Object param3) Logs the entry to a method that has three input parameters.
void	debugEntry(java.lang.String className, java.lang.String method, java.lang.Object param1, java.lang.Object param2, java.lang.Object param3, java.lang.Object param4) Logs the entry to a method that has four input parameters.
void	debugExit(java.lang.String className, java.lang.String method) Writes a message to the log at Debug level indicating the normal exit point of a method that returns void.
void	debugExit(java.lang.String className, java.lang.String method, java.lang.Object returnValue) Writes a message to the log at Debug level indicating the normal exit point of a method that returns a value.
void	error(java.lang.String className, java.lang.String method, java.lang.String msg) Writes a message to the log at Error level.
void	error(java.lang.String className, java.lang.String method, java.lang.String msg, java.lang.Throwable t) Writes a message to the log at Error level, along with a Throwable.
void	fatal(java.lang.String className, java.lang.String method, java.lang.String msg) Writes a message to the log at Fatal level.
void	fatal(java.lang.String className, java.lang.String method, java.lang.String msg, java.lang.Throwable t) Writes a message to the log at Fatal level, along with a Throwable.
void	info(java.lang.String className, java.lang.String method, java.lang.String msg) Writes a message to the log at Info level.
void	info(java.lang.String className, java.lang.String method, java.lang.String msg, java.lang.Throwable t) Writes a message to the log at Info level, along with a Throwable.
boolean	isDebug() Indicates whether the Debug level is enabled.
boolean	isError() Indicates whether the Error level is enabled.
boolean	isInfo() Indicates whether the Info level is enabled.
boolean	isWarn() Indicates whether the Warn level is enabled.
void	warn(java.lang.String className, java.lang.String method, java.lang.String msg) Writes a message to the log at Warn level.
void	warn(java.lang.String className, java.lang.String method, java.lang.String msg, java.lang.Throwable t) Writes a message to the log at Warn level, along with a Throwable.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContentCatalogLogger

public ContentCatalogLogger(MXLogger logger)

Creates an ContentCatalogLogger from an MXLogger

Method Detail

isDebug

public boolean isDebug()

Indicates whether the Debug level is enabled.

Returns:

true if Debug and higher levels are enabled; false otherwise

isInfo

public boolean isInfo()

Indicates whether the Info level is enabled.

Returns:

true if Info and higher levels are enabled; false otherwise

isWarn

public boolean isWarn()

Indicates whether the Warn level is enabled.

Returns:

true if Warn and higher levels are enabled; false otherwise

isError

public boolean isError()

Indicates whether the Error level is enabled.

Returns:

true if Error and higher levels are enabled; false otherwise

debug

public void debug(java.lang.String className,
                  java.lang.String method,
                  java.lang.String msg)

Writes a message to the log at Debug level.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

debug

public void debug(java.lang.String className,
                  java.lang.String method,
                  java.lang.String msg,
                  java.lang.Throwable t)

Writes a message to the log at Debug level, along with a Throwable.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

t - a Throwable related to the message

info

public void info(java.lang.String className,
                 java.lang.String method,
                 java.lang.String msg)

Writes a message to the log at Info level.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

info

public void info(java.lang.String className,
                 java.lang.String method,
                 java.lang.String msg,
                 java.lang.Throwable t)

Writes a message to the log at Info level, along with a Throwable.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

t - a Throwable related to the message

warn

public void warn(java.lang.String className,
                 java.lang.String method,
                 java.lang.String msg)

Writes a message to the log at Warn level.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

warn

public void warn(java.lang.String className,
                 java.lang.String method,
                 java.lang.String msg,
                 java.lang.Throwable t)

Writes a message to the log at Warn level, along with a Throwable.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

t - a Throwable related to the message

error

public void error(java.lang.String className,
                  java.lang.String method,
                  java.lang.String msg)

Writes a message to the log at Error level.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

error

public void error(java.lang.String className,
                  java.lang.String method,
                  java.lang.String msg,
                  java.lang.Throwable t)

Writes a message to the log at Error level, along with a Throwable.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

t - a Throwable related to the message

fatal

public void fatal(java.lang.String className,
                  java.lang.String method,
                  java.lang.String msg)

Writes a message to the log at Fatal level.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

fatal

public void fatal(java.lang.String className,
                  java.lang.String method,
                  java.lang.String msg,
                  java.lang.Throwable t)

Writes a message to the log at Fatal level, along with a Throwable.

Parameters:

className - the name of the class that contains this call

method - the name of the method that contains this call

msg - the message to be written to the log

t - a Throwable related to the message

debugEntry

public void debugEntry(java.lang.String className,
                       java.lang.String method,
                       java.lang.Object[] params)

Writes a message to the log at Debug level indicating that a new method has just been entered. The output message will include the class and method name that is being entered, as well as the value of each input parameter of the entered method. This method is intended to be called at the very top of the enclosing method.

This is the most general purpose of the debugEntry() methods. In practice, this method is only necessary for methods that take more than four parameters, as there are convenience methods for use with methods that take four or fewer params. The convenience methods will also give better performance.

Parameters:

className - the name of the class containing the method that is being entered

method - the name of the method that is being entered

params - an array of the parameters to the method being entered. May be null or empty.

debugEntry

public void debugEntry(java.lang.String className,
                       java.lang.String method)

Logs the entry to a method that has no input parameters. This is a convenience method that does the same thing as debugEntry(String,String,Object[]).

Parameters:

className - the name of the class containing the method that is being entered

method - the name of the method that is being entered

debugEntry

public void debugEntry(java.lang.String className,
                       java.lang.String method,
                       java.lang.Object param1)

Logs the entry to a method that has one input parameter. This is a convenience method that does the same thing as general method debugEntry(String,String,Object[]).

Parameters:

className - the name of the class containing the method that is being entered

method - the name of the method that is being entered

param1 - the first parameter of the method being entered.

debugEntry

public void debugEntry(java.lang.String className,
                       java.lang.String method,
                       java.lang.Object param1,
                       java.lang.Object param2)

Logs the entry to a method that has two input parameters. This is a convenience method that does the same thing as debugEntry(String,String,Object[]).

Parameters:

className - the name of the class containing the method that is being entered

method - the name of the method that is being entered

param1 - the first parameter of the method being entered.

param2 - the second parameter of the method being entered.

debugEntry

public void debugEntry(java.lang.String className,
                       java.lang.String method,
                       java.lang.Object param1,
                       java.lang.Object param2,
                       java.lang.Object param3)

Logs the entry to a method that has three input parameters. This is a convenience method that does the same thing as debugEntry(String,String,Object[]).

Parameters:

className - the name of the class containing the method that is being entered

method - the name of the method that is being entered

param1 - the first parameter of the method being entered.

param2 - the second parameter of the method being entered.

param3 - the third parameter of the method being entered.

debugEntry

public void debugEntry(java.lang.String className,
                       java.lang.String method,
                       java.lang.Object param1,
                       java.lang.Object param2,
                       java.lang.Object param3,
                       java.lang.Object param4)

Logs the entry to a method that has four input parameters. This is a convenience method that does the same thing as debugEntry(String,String,Object[]).

Parameters:

className - the name of the class containing the method that is being entered

method - the name of the method that is being entered

param1 - the first parameter of the method being entered.

param2 - the second parameter of the method being entered.

param3 - the third parameter of the method being entered.

param4 - the fourth parameter of the method being entered.

debugExit

public void debugExit(java.lang.String className,
                      java.lang.String method,
                      java.lang.Object returnValue)

Writes a message to the log at Debug level indicating the normal exit point of a method that returns a value. The output message will include the class and method name of the method that is being exited, as well as the method's return value. This method is intended to be the very last line of the method being exited, except for the return line.

NOTE: This method should be used for normal exit only (before a return statement), and NOT before a throw statement. If there are multiple return statements in a method, this method should be called before each one.

For methods that return void, use debugExit(String,String) instead. This will make it possible to distinguish in the log between methods returning null and methods that return void.

Parameters:

className - the name of the class containing the method that is being exited

method - the name of the method that is being exited

returnValue - the value being returned by the method being exited

debugExit

public void debugExit(java.lang.String className,
                      java.lang.String method)

Writes a message to the log at Debug level indicating the normal exit point of a method that returns void. The output message will include the class and method name of the method that is being exited. This method is intended to be the very last line of code of the method being exited (except for the return statement, if any).

NOTE: This method should be used for normal exit only (before a return statement or at the bottom of the method), and NOT before a throw statement. If there are multiple return statements, this method should be called just before each one, as well as at the bottom of the method.

For methods that return a value, even if it is null, use debugExit(String,String,Object) instead. This will make it possible to distinguish in the log between methods returning null and methods that return void.

Parameters:

className - the name of the class containing the method that is being exited

method - the name of the method that is being exited