AppenderSkeleton

java.lang.Object
- com.fr.third.apache.log4j.AppenderSkeleton

所有已实现的接口:

Appender, OptionHandler

直接已知子类:

AsyncAppender, DesignerLogAppender, ErrorInfoLogAppender, JDBCAppender, JMSAppender, LF5Appender, LogRecordService, NTEventLogAppender, NullAppender, RewriteAppender, SMTPAppender, SocketAppender, SocketHubAppender, SyslogAppender, TelnetAppender, WriterAppender
```
public abstract class AppenderSkeleton
extends java.lang.Object
implements Appender, OptionHandler
```
Abstract superclass of the other appenders in the package. This class provides the code for common functionality, such as support for threshold filtering and support for general filters.

从以下版本开始:

0.8.1

作者:

Ceki Gülcü

字段概要

字段
限定符和类型	字段和说明
`protected boolean`	`closed` Is this appender closed?
`protected ErrorHandler`	`errorHandler` It is assumed and enforced that errorHandler is never null.
`protected Filter`	`headFilter` The first filter in the filter chain.
`protected Layout`	`layout` The layout variable does not need to be set if the appender implementation has its own layout.
`protected java.lang.String`	`name` Appenders are named.
`protected Filter`	`tailFilter` The last filter in the filter chain.
`protected Priority`	`threshold` There is no level threshold filtering by default.

构造器概要

构造器
限定符构造器和说明

AppenderSkeleton()
Create new instance.

protected AppenderSkeleton(boolean isActive)
Create new instance.

构造器
限定符	构造器和说明
	`AppenderSkeleton()` Create new instance.
`protected`	`AppenderSkeleton(boolean isActive)` Create new instance.

方法概要

方法
限定符和类型	方法和说明
`void`	`activateOptions()` Derived appenders should override this method if option structure requires it.
`void`	`addFilter(Filter newFilter)` Add a filter to end of the filter list.
`protected abstract void`	`append(LoggingEvent event)` Subclasses of `AppenderSkeleton` should implement this method to perform actual logging.
`void`	`clearFilters()` Clear the filters chain.
`void`	`doAppend(LoggingEvent event)` This method performs threshold checks and invokes filters before delegating actual logging to the subclasses specific `append(com.fr.third.apache.log4j.spi.LoggingEvent)` method.
`void`	`finalize()` Finalize this appender by calling the derived class' `close` method.
`ErrorHandler`	`getErrorHandler()` Return the currently set `ErrorHandler` for this Appender.
`Filter`	`getFilter()` Returns the head Filter.
`Filter`	`getFirstFilter()` Return the first filter in the filter chain for this Appender.
`Layout`	`getLayout()` Returns the layout of this appender.
`java.lang.String`	`getName()` Returns the name of this appender.
`Priority`	`getThreshold()` Returns this appenders threshold level.
`boolean`	`isAsSevereAsThreshold(Priority priority)` Check whether the message level is below the appender's threshold.
`void`	`setErrorHandler(ErrorHandler eh)` Set the `ErrorHandler` for this Appender.
`void`	`setLayout(Layout layout)` Set the layout for this appender.
`void`	`setName(java.lang.String name)` Set the name of this Appender.
`void`	`setThreshold(Priority threshold)` Set the threshold level.

从类继承的方法 java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 com.fr.third.apache.log4j.Appender
close, requiresLayout

- 字段详细资料
  - layout
```
protected Layout layout
```
    The layout variable does not need to be set if the appender implementation has its own layout.
  - name
```
protected java.lang.String name
```
    Appenders are named.
  - threshold
```
protected Priority threshold
```
    There is no level threshold filtering by default.
  - errorHandler
```
protected ErrorHandler errorHandler
```
    It is assumed and enforced that errorHandler is never null.
  - headFilter
```
protected Filter headFilter
```
    The first filter in the filter chain. Set to null initially.
  - tailFilter
```
protected Filter tailFilter
```
    The last filter in the filter chain.
  - closed
```
protected boolean closed
```
    Is this appender closed?
- 构造器详细资料
  - AppenderSkeleton
```
public AppenderSkeleton()
```
    Create new instance.
  - AppenderSkeleton
```
protected AppenderSkeleton(boolean isActive)
```
    Create new instance. Provided for compatibility with log4j 1.3.
    
    参数:
    isActive - true if appender is ready for use upon construction. Not used in log4j 1.2.x.
    从以下版本开始:
    
    1.2.15
- 方法详细资料
  - activateOptions
```
public void activateOptions()
```
    Derived appenders should override this method if option structure requires it.
    
    指定者:
    
    activateOptions 在接口中 OptionHandler
  - addFilter
```
public void addFilter(Filter newFilter)
```
    Add a filter to end of the filter list.
    
    指定者:
    
    addFilter 在接口中 Appender
    
    从以下版本开始:
    
    0.9.0
  - append
```
protected abstract void append(LoggingEvent event)
```
    Subclasses of AppenderSkeleton should implement this method to perform actual logging. See also AppenderSkeleton.doAppend method.
    
    从以下版本开始:
    
    0.9.0
  - clearFilters
```
public void clearFilters()
```
    Clear the filters chain.
    
    指定者:
    
    clearFilters 在接口中 Appender
    
    从以下版本开始:
    
    0.9.0
  - finalize
```
public void finalize()
```
    Finalize this appender by calling the derived class' close method.
    
    覆盖:
    
    finalize 在类中 java.lang.Object
    
    从以下版本开始:
    
    0.8.4
  - getErrorHandler
```
public ErrorHandler getErrorHandler()
```
    Return the currently set ErrorHandler for this Appender.
    
    指定者:
    
    getErrorHandler 在接口中 Appender
    
    从以下版本开始:
    
    0.9.0
  - getFilter
```
public Filter getFilter()
```
    Returns the head Filter.
    
    指定者:
    
    getFilter 在接口中 Appender
    
    返回:
    the head Filter or null, if no Filters are present
    从以下版本开始:
    
    1.1
  - getFirstFilter
```
public final Filter getFirstFilter()
```
    Return the first filter in the filter chain for this Appender. The return value may be null if no is filter is set.
  - getLayout
```
public Layout getLayout()
```
    Returns the layout of this appender. The value may be null.
    
    指定者:
    
    getLayout 在接口中 Appender
  - getName
```
public final java.lang.String getName()
```
    Returns the name of this appender.
    
    指定者:
    
    getName 在接口中 Appender
    
    返回:
    name, may be null.
  - getThreshold
```
public Priority getThreshold()
```
    Returns this appenders threshold level. See the setThreshold(com.fr.third.apache.log4j.Priority) method for the meaning of this option.
    
    从以下版本开始:
    
    1.1
  - isAsSevereAsThreshold
```
public boolean isAsSevereAsThreshold(Priority priority)
```
    Check whether the message level is below the appender's threshold. If there is no threshold set, then the return value is always true.
  - doAppend
```
public void doAppend(LoggingEvent event)
```
    This method performs threshold checks and invokes filters before delegating actual logging to the subclasses specific append(com.fr.third.apache.log4j.spi.LoggingEvent) method.
    
    指定者:
    
    doAppend 在接口中 Appender
  - setErrorHandler
```
public void setErrorHandler(ErrorHandler eh)
```
    Set the ErrorHandler for this Appender.
    
    指定者:
    
    setErrorHandler 在接口中 Appender
    
    从以下版本开始:
    
    0.9.0
  - setLayout
```
public void setLayout(Layout layout)
```
    Set the layout for this appender. Note that some appenders have their own (fixed) layouts or do not use one. For example, the SocketAppender ignores the layout set here.
    
    指定者:
    
    setLayout 在接口中 Appender
  - setName
```
public void setName(java.lang.String name)
```
    Set the name of this Appender.
    
    指定者:
    
    setName 在接口中 Appender
  - setThreshold
```
public void setThreshold(Priority threshold)
```
    Set the threshold level. All log events with lower level than the threshold level are ignored by the appender.
    In configuration files this option is specified by setting the value of the Threshold option to a level string, such as "DEBUG", "INFO" and so on.
    
    从以下版本开始:
    
    0.8.3

类 AppenderSkeleton

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 com.fr.third.apache.log4j.Appender

字段详细资料

layout

name

threshold

errorHandler

headFilter

tailFilter

closed

构造器详细资料

AppenderSkeleton

AppenderSkeleton

方法详细资料

activateOptions

addFilter

append

clearFilters

finalize

getErrorHandler

getFilter

getFirstFilter

getLayout

getName

getThreshold

isAsSevereAsThreshold

doAppend

setErrorHandler

setLayout

setName

setThreshold