Logger

java.lang.Object
- org.apache.felix.resolver.Logger

```
public class Logger
extends java.lang.Object
```
This class mimics the standard OSGi LogService interface. An instance of this class is used by the framework for all logging. By default this class logs messages to standard out. The log level can be set to control the amount of logging performed, where a higher number results in more logging. A log level of zero turns off logging completely.

The log levels match those specified in the OSGi Log Service (i.e., 1 = error, 2 = warning, 3 = information, and 4 = debug). The default value is 1.

This class also uses the System Bundle's context to track log services and will use the highest ranking log service, if present, as a back end instead of printing to standard out. The class uses reflection to invoking the log service's method to avoid a dependency on the log interface.

Field Summary

Fields
Modifier and Type Field Description

static int LOG_DEBUG

static int LOG_ERROR

static int LOG_INFO

static int LOG_WARNING

private int m_logLevel

Constructor Summary

Constructors
Constructor Description

Logger(int i)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private void`	`_log(int level, java.lang.String msg, java.lang.Throwable throwable)`
`void`	`debug(java.lang.String msg)`
`protected void`	`doLog(int level, java.lang.String msg, java.lang.Throwable throwable)`
`int`	`getLogLevel()`
`boolean`	`isDebugEnabled()`
`void`	`log(int level, java.lang.String msg)`
`void`	`log(int level, java.lang.String msg, java.lang.Throwable throwable)`
`void`	`logUsesConstraintViolation(org.osgi.resource.Resource resource, ResolutionError error)`
`void`	`setLogLevel(int i)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- 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_logLevel
```
private int m_logLevel
```

Constructor Detail
- Logger
```
public Logger(int i)
```

Method Detail

setLogLevel

public final void setLogLevel(int i)

getLogLevel
```
public final int getLogLevel()
```

log

public final void log(int level,
                      java.lang.String msg)

log

public final void log(int level,
                      java.lang.String msg,
                      java.lang.Throwable throwable)

isDebugEnabled
```
public boolean isDebugEnabled()
```

debug

public final void debug(java.lang.String msg)

doLog

protected void doLog(int level,
                     java.lang.String msg,
                     java.lang.Throwable throwable)

_log

private void _log(int level,
                  java.lang.String msg,
                  java.lang.Throwable throwable)

logUsesConstraintViolation

public void logUsesConstraintViolation(org.osgi.resource.Resource resource,
                                       ResolutionError error)