org.apache.logging.log4j.core.appender

Class AbstractWriterAppender<M extends WriterManager>

java.lang.Object

org.apache.logging.log4j.core.AbstractLifeCycle

org.apache.logging.log4j.core.filter.AbstractFilterable

org.apache.logging.log4j.core.appender.AbstractAppender

org.apache.logging.log4j.core.appender.AbstractWriterAppender<M>

Type Parameters:

M - The kind of WriterManager under management

All Implemented Interfaces:

Appender, Filterable, LifeCycle, LifeCycle2

Direct Known Subclasses:

WriterAppender

public abstract class AbstractWriterAppender<M extends WriterManager>
extends AbstractAppender

Appends log events as strings to a writer.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.logging.log4j.core.appender.AbstractAppender

AbstractAppender.Builder<B extends AbstractAppender.Builder<B>>

Nested classes/interfaces inherited from interface org.apache.logging.log4j.core.LifeCycle

LifeCycle.State

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	immediateFlush Immediate flush means that the underlying writer will be flushed at the end of each append operation.
private M	manager
private java.util.concurrent.locks.Lock	readLock
private java.util.concurrent.locks.ReadWriteLock	readWriteLock

Fields inherited from class org.apache.logging.log4j.core.AbstractLifeCycle

DEFAULT_STOP_TIMEOUT, DEFAULT_STOP_TIMEUNIT, LOGGER

Fields inherited from interface org.apache.logging.log4j.core.Appender

ELEMENT_TYPE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractWriterAppender(java.lang.String name, StringLayout layout, Filter filter, boolean ignoreExceptions, boolean immediateFlush, M manager) Instantiates.

Method Summary

Modifier and Type	Method and Description
void	append(LogEvent event) Actual writing occurs here.
M	getManager() Gets the manager.
StringLayout	getStringLayout()
void	start() Make the Filter available for use.
boolean	stop(long timeout, java.util.concurrent.TimeUnit timeUnit) Cleanup the Filter.

Methods inherited from class org.apache.logging.log4j.core.appender.AbstractAppender

error, error, error, getHandler, getLayout, getName, ignoreExceptions, parseInt, setHandler, toString

Methods inherited from class org.apache.logging.log4j.core.filter.AbstractFilterable

addFilter, getFilter, hasFilter, isFiltered, removeFilter, stop

Methods inherited from class org.apache.logging.log4j.core.AbstractLifeCycle

equalsImpl, getState, getStatusLogger, hashCodeImpl, initialize, isInitialized, isStarted, isStarting, isStopped, isStopping, setStarted, setStarting, setState, setStopped, setStopping, stop, stop

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.logging.log4j.core.LifeCycle

getState, initialize, isStarted, isStopped, stop

Field Detail

immediateFlush

protected final boolean immediateFlush

Immediate flush means that the underlying writer will be flushed at the end of each append operation. Immediate flush is slower but ensures that each append request is actually written. If immediateFlush is set to false, then there is a good chance that the last few logs events are not actually written to persistent media if and when the application crashes.

manager

private final M extends WriterManager manager

readWriteLock

private final java.util.concurrent.locks.ReadWriteLock readWriteLock

readLock

private final java.util.concurrent.locks.Lock readLock

Constructor Detail

AbstractWriterAppender

protected AbstractWriterAppender(java.lang.String name,
                                 StringLayout layout,
                                 Filter filter,
                                 boolean ignoreExceptions,
                                 boolean immediateFlush,
                                 M manager)

Instantiates.

Parameters:

name - The name of the Appender.

layout - The layout to format the message.

manager - The OutputStreamManager.

Method Detail

append

public void append(LogEvent event)

Actual writing occurs here.

Most subclasses will need to override this method.

Parameters:

event - The LogEvent.

getManager

public M getManager()

Gets the manager.

Returns:

the manager.

getStringLayout

public StringLayout getStringLayout()

start

public void start()

Description copied from class: AbstractFilterable

Make the Filter available for use.

Specified by:

start in interface LifeCycle

Overrides:

start in class AbstractFilterable

stop

public boolean stop(long timeout,
                    java.util.concurrent.TimeUnit timeUnit)

Description copied from class: AbstractFilterable

Cleanup the Filter.

Specified by:

stop in interface LifeCycle2

Overrides:

stop in class AbstractFilterable

Parameters:

timeout - the maximum time to wait

timeUnit - the time unit of the timeout argument

Returns:

true if the receiver was stopped cleanly and normally, false otherwise.