add front demo in this project

LFtid1056/cloudfront/code/log4cplus/spi/appenderattachable.h

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+// -*- C++ -*-
+// Module:  Log4CPLUS
+// File:    appenderattachable.h
+// Created: 6/2001
+// Author:  Tad E. Smith
+//
+//
+// Copyright 2001-2017 Tad E. Smith
+//
+// Licensed 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.
+
+/** @file */
+
+#ifndef LOG4CPLUS_SPI_APPENDER_ATTACHABLE_HEADER_
+#define LOG4CPLUS_SPI_APPENDER_ATTACHABLE_HEADER_
+
+#include <log4cplus/config.hxx>
+
+#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
+#pragma once
+#endif
+
+#include <log4cplus/appender.h>
+#include <log4cplus/tstring.h>
+#include <log4cplus/helpers/pointer.h>
+#include <vector>
+
+namespace log4cplus {
+    // Forward Declarations
+    typedef std::vector<log4cplus::SharedAppenderPtr> SharedAppenderPtrList;
+
+    namespace spi {
+
+        /**
+         * This Interface is for attaching Appenders to objects.
+         */
+        class LOG4CPLUS_EXPORT AppenderAttachable {
+        public:
+          // Methods
+            /**
+             * Add an appender.
+             */
+            virtual void addAppender(SharedAppenderPtr newAppender) = 0;
+
+            /**
+             * Get all previously added appenders as an Enumeration.
+             */
+            virtual SharedAppenderPtrList getAllAppenders() = 0;
+
+            /**
+             * Get an appender by name.
+             */
+            virtual SharedAppenderPtr getAppender(const log4cplus::tstring& name) = 0;
+
+            /**
+             * Remove all previously added appenders.
+             */
+            virtual void removeAllAppenders() = 0;
+
+            /**
+             * Remove the appender passed as parameter from the list of appenders.
+             */
+            virtual void removeAppender(SharedAppenderPtr appender) = 0;
+
+            /**
+             * Remove the appender with the name passed as parameter from the
+             * list of appenders.
+             */
+            virtual void removeAppender(const log4cplus::tstring& name) = 0;
+
+          // Dtor
+            virtual ~AppenderAttachable() = 0;
+        };
+
+    } // end namespace spi
+} // end namespace log4cplus
+
+#endif // LOG4CPLUS_SPI_APPENDER_ATTACHABLE_HEADER_