Logger (SmartClient Enterprise Server API 14.0d (2024-12-22))

java.lang.Object
- com.isomorphic.log.Logger

```
public class Logger
extends java.lang.Object
```
Logger provides a mechanism for tracking log messages. By default Isomorphic SmartClient server-side logging is based on Apache's open source log4j API, although there is a possibility to use other logging frameworks via Quality Open Software's (QOS.ch) Simple Logging Facade for Java (slf4j) API. For more general information on log4j, see this " Short introduction to log4j" on the Apache website. For more general information on slf4j, see this "SLF4J user manual" on the QOSs.ch website. Search for "serverLogging" in SmartClient Reference for information on how to switch between logging frameworks.
The logging priorities used in the Isomorphic SmartClient framework are:
- fatal--unrecoverable error, the program will probably crash (if slf4j is used, then this will also use error priority, as slf4j does not support fatal priority)
- error--recoverable error, the program may become unstable
- warning--unusual data or a risky operation is about to be attempted
- info--interesting events worth noting
- debug--any message that aids in debugging to track system progress
The methods in the Logger class can be used to log debug, warning, or error messages from classes running in the Isomorphic SmartClient environment. To create a new logger to track messages by class name, place the following line of code at the top of the class definition:
private static Logger log = new Logger(myClass.class.getName());

Constructor Summary

Constructors
Constructor and Description
`Logger(java.lang.Class objClass)` Constructs `Logger` object using className of provided `Class` as logging category.
`Logger(java.lang.String subsystem)` Constructs `Logger` object using provided `subsystem` as logging category.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`debug(java.lang.Object message)` Logs a message with "`debug`" status.
`void`	`error(java.lang.Object message)` Logs a message with "`error`" status.
`void`	`fatal(java.lang.Object message)` Logs a message with "`fatal`" status.
`void`	`info(java.lang.Object message, java.lang.Throwable t)` Logs a message with "`info`" status.
`boolean`	`isDebugEnabled()` Checks if the logger has been enabled to allow `debug` messages.
`boolean`	`isErrorEnabled()` Checks if the logger has been enabled to allow `error` messages.
`boolean`	`isFatalEnabled()` Checks if the logger has been enabled to allow `fatal` messages.
`boolean`	`isInfoEnabled()` Checks if the logger has been enabled to allow `info` messages.
`boolean`	`isWarnEnabled()` Checks if the logger has been enabled to allow `warning` messages.
`void`	`warning(java.lang.Object message)` Logs a message with "`warning`" status.

- Constructor Detail
  - Logger
```
public Logger(java.lang.Class objClass)
```
    Constructs Logger object using className of provided Class as logging category.
  - Logger
```
public Logger(java.lang.String subsystem)
```
    Constructs Logger object using provided subsystem as logging category.
- Method Detail
  - fatal
```
public void fatal(java.lang.Object message)
```
    Logs a message with "fatal" status.
    
    Parameters:
    
    message - the message to log
  - error
```
public void error(java.lang.Object message)
```
    Logs a message with "error" status.
    
    Parameters:
    
    message - the message to log
  - warning
```
public void warning(java.lang.Object message)
```
    Logs a message with "warning" status.
    
    Parameters:
    
    message - the message to log
  - info
```
public void info(java.lang.Object message,
                 java.lang.Throwable t)
```
    Logs a message with "info" status.
    
    Parameters:
    
    message - the message to log
  - debug
```
public void debug(java.lang.Object message)
```
    Logs a message with "debug" status.
    
    Parameters:
    
    message - the message to log
  - isFatalEnabled
```
public boolean isFatalEnabled()
```
    Checks if the logger has been enabled to allow fatal messages.
    
    Returns:
    
    true if enabled, and false otherwise
  - isDebugEnabled
```
public boolean isDebugEnabled()
```
    Checks if the logger has been enabled to allow debug messages.
    
    Returns:
    
    true if enabled, and false otherwise
  - isInfoEnabled
```
public boolean isInfoEnabled()
```
    Checks if the logger has been enabled to allow info messages.
    
    Returns:
    
    true if enabled, and false otherwise
  - isWarnEnabled
```
public boolean isWarnEnabled()
```
    Checks if the logger has been enabled to allow warning messages.
    
    Returns:
    
    true if enabled, and false otherwise
  - isErrorEnabled
```
public boolean isErrorEnabled()
```
    Checks if the logger has been enabled to allow error messages.
    
    Returns:
    
    true if enabled, and false otherwise

Class Logger

Constructor Summary

Method Summary

Constructor Detail

Logger

Logger

Method Detail

fatal

error

warning

info

debug

isFatalEnabled

isDebugEnabled

isInfoEnabled

isWarnEnabled

isErrorEnabled