Package org.apache.felix.utils.log

Class Logger

java.lang.Object

org.apache.felix.utils.log.Logger

public class Logger
extends Object

Internal logger to be used in order to avoid a mandatory dependency on OSGi LogService. It first tries to log to a log service implementation if there is one available and then fallback to System out/err in case there is no log service available.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	LOG_DEBUG
static final int	LOG_ERROR
static final int	LOG_INFO
static final int	LOG_WARNING
private final org.osgi.framework.BundleContext	m_context	Bundle context.
private boolean	m_isLogClassPresent

Constructor Summary

Constructors

Constructor	Description
Logger(org.osgi.framework.BundleContext context)	Constructor.

Method Summary

Modifier and Type	Method	Description
private boolean	_log(int level, String message, Throwable exception)	Lookup the OSGi LogService and if available use it.
private PrintStream	getStream(int level)	Return the standard print streams to use depending on log level.
void	log(int level, String message)	Logs a message.
void	log(int level, String message, Throwable exception)	Logs a message.

Methods inherited from class java.lang.Object

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

Field Details

LOG_ERROR

public static final int LOG_ERROR

See Also:

• Constant Field Values

LOG_WARNING

public static final int LOG_WARNING

See Also:

• Constant Field Values

LOG_INFO

public static final int LOG_INFO

See Also:

• Constant Field Values

LOG_DEBUG

public static final int LOG_DEBUG

See Also:

• Constant Field Values

m_context

private final org.osgi.framework.BundleContext m_context

Bundle context.

m_isLogClassPresent

private boolean m_isLogClassPresent

Constructor Details

Logger

public Logger(org.osgi.framework.BundleContext context)

Constructor.

Parameters:

context - bundle context

Method Details

log

public void log(int level,
 String message)

Logs a message.

Parameters:

level - The severity of the message. T

message - Human readable string describing the condition or null.

See Also:

• LogService.log(int, String)

log

public void log(int level,
 String message,
 Throwable exception)

Logs a message.

Parameters:

level - The severity of the message. T

message - Human readable string describing the condition or null.

exception - The exception that reflects the condition or null.

See Also:

• LogService.log(int, String, Throwable)

_log

private boolean _log(int level,
 String message,
 Throwable exception)

Lookup the OSGi LogService and if available use it.

getStream

private PrintStream getStream(int level)

Return the standard print streams to use depending on log level.

Parameters:

level - log level

Returns:

print stream corresponding to log level