/usr/include/log4cxx/appender.h is in liblog4cxx-dev 0.10.0-12.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _LOG4CXX_APPENDER_H
#define _LOG4CXX_APPENDER_H
#if defined(_MSC_VER)
#pragma warning ( push )
#pragma warning ( disable: 4231 4251 4275 4786 )
#endif
#include <log4cxx/spi/optionhandler.h>
#include <log4cxx/helpers/objectptr.h>
#include <log4cxx/helpers/object.h>
#include <vector>
namespace log4cxx
{
// Forward declarations
namespace spi
{
class LoggingEvent;
typedef helpers::ObjectPtrT<LoggingEvent> LoggingEventPtr;
class Filter;
typedef helpers::ObjectPtrT<Filter> FilterPtr;
class ErrorHandler;
typedef log4cxx::helpers::ObjectPtrT<ErrorHandler> ErrorHandlerPtr;
}
class Layout;
typedef log4cxx::helpers::ObjectPtrT<Layout> LayoutPtr;
/**
Implement this interface for your own strategies for outputting log
statements.
*/
class LOG4CXX_EXPORT Appender :
public virtual spi::OptionHandler
{
public:
DECLARE_ABSTRACT_LOG4CXX_OBJECT(Appender)
virtual ~Appender() {}
/**
Add a filter to the end of the filter list.
*/
virtual void addFilter(const spi::FilterPtr& newFilter) = 0;
/**
Returns the head Filter. The Filters are organized in a linked list
and so all Filters on this Appender are available through the result.
@return the head Filter or null, if no Filters are present
*/
virtual spi::FilterPtr getFilter() const = 0;
/**
Clear the list of filters by removing all the filters in it.
*/
virtual void clearFilters() = 0;
/**
Release any resources allocated within the appender such as file
handles, network connections, etc.
<p>It is a programming error to append to a closed appender.
*/
virtual void close() = 0;
/**
Log in <code>Appender</code> specific way. When appropriate,
Loggers will call the <code>doAppend</code> method of appender
implementations in order to log.
*/
virtual void doAppend(const spi::LoggingEventPtr& event,
log4cxx::helpers::Pool& pool) = 0;
/**
Get the name of this appender. The name uniquely identifies the
appender.
*/
virtual LogString getName() const = 0;
/**
Set the Layout for this appender.
*/
virtual void setLayout(const LayoutPtr& layout) = 0;
/**
Returns this appenders layout.
*/
virtual LayoutPtr getLayout() const = 0;
/**
Set the name of this appender. The name is used by other
components to identify this appender.
*/
virtual void setName(const LogString& name) = 0;
/**
Configurators call this method to determine if the appender
requires a layout. If this method returns <code>true</code>,
meaning that layout is required, then the configurator will
configure an layout using the configuration information at its
disposal. If this method returns <code>false</code>, meaning that
a layout is not required, then layout configuration will be
skipped even if there is available layout configuration
information at the disposal of the configurator..
<p>In the rather exceptional case, where the appender
implementation admits a layout but can also work without it, then
the appender should return <code>true</code>.
*/
virtual bool requiresLayout() const = 0;
};
LOG4CXX_PTR_DEF(Appender);
LOG4CXX_LIST_DEF(AppenderList, AppenderPtr);
}
#if defined(_MSC_VER)
#pragma warning ( pop )
#endif
#endif //_LOG4CXX_APPENDER_H
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