omero.log

Interface Logger

All Known Implementing Classes:

NullLogger, SimpleLogger

public interface Logger

Defines the log service interface. Operations are defined to log messages according the severity of the event:

• DEBUG: all debug messages.
• INFO: regular log messages that inform about normal application workflow.
• WARN: messages emitted in case of abnormal or suspect application behavior.
• ERROR: all error conditions and failures that can be recovered.
• FATAL: severe failures that require the application to terminate.

Every method takes in two parameters: the originator of the log message and the log message itself. If the message spans multiple lines, then a LogMessage object should be used to construct it.

A configuration file (in the configuration directory under the installation directory) provides for fine-tuning of the log settings on a per-class basis. Those settings include the choice of output locations and verbosity based on priority levels — DEBUG has a lower priority than INFO, which, in turn, is lower priority than WARN, and so on.

The implementation of the service is thread-safe. Methods can be called from different threads without compromising the integrity of the log records.

Since:

OME2.2

Method Summary

Modifier and Type	Method and Description
void	debug(java.lang.Object originator, LogMessage msg) Logs a debug message.
void	debug(java.lang.Object originator, java.lang.String logMsg) Logs a debug message.
void	error(java.lang.Object originator, LogMessage msg) Logs an error message.
void	error(java.lang.Object originator, java.lang.String logMsg) Logs an error message.
void	fatal(java.lang.Object originator, LogMessage msg) Logs a fatal message.
void	fatal(java.lang.Object originator, java.lang.String logMsg) Logs a fatal message.
java.lang.String	getLogFile() Returns the log file.
void	info(java.lang.Object originator, LogMessage msg) Logs an info message.
void	info(java.lang.Object originator, java.lang.String logMsg) Logs an info message.
void	warn(java.lang.Object originator, LogMessage msg) Logs a warn message.
void	warn(java.lang.Object originator, java.lang.String logMsg) Logs a warn message.

Method Detail

debug

void debug(java.lang.Object originator,
           java.lang.String logMsg)

Logs a debug message.

Parameters:

originator - The originator of the message.

logMsg - The log message.

debug

void debug(java.lang.Object originator,
           LogMessage msg)

Logs a debug message.

Parameters:

originator - The originator of the message.

msg - The log message.

info

void info(java.lang.Object originator,
          java.lang.String logMsg)

Logs an info message.

Parameters:

originator - The originator of the message.

logMsg - The log message.

info

void info(java.lang.Object originator,
          LogMessage msg)

Logs an info message.

Parameters:

originator - The originator of the message.

msg - The log message.

warn

void warn(java.lang.Object originator,
          java.lang.String logMsg)

Logs a warn message.

Parameters:

originator - The originator of the message.

logMsg - The log message.

warn

void warn(java.lang.Object originator,
          LogMessage msg)

Logs a warn message.

Parameters:

originator - The originator of the message.

msg - The log message.

error

void error(java.lang.Object originator,
           java.lang.String logMsg)

Logs an error message.

Parameters:

originator - The originator of the message.

logMsg - The log message.

error

void error(java.lang.Object originator,
           LogMessage msg)

Logs an error message.

Parameters:

originator - The originator of the message.

msg - The log message.

fatal

void fatal(java.lang.Object originator,
           java.lang.String logMsg)

Logs a fatal message.

Parameters:

originator - The originator of the message.

logMsg - The log message.

fatal

void fatal(java.lang.Object originator,
           LogMessage msg)

Logs a fatal message.

Parameters:

originator - The originator of the message.

msg - The log message.

getLogFile

java.lang.String getLogFile()

Returns the log file.

Returns:

See above.