StreamHandler.h

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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 _DECAF_UTIL_LOGGING_STREAMHANDLER_H_
#define _DECAF_UTIL_LOGGING_STREAMHANDLER_H_

#include <decaf/util/logging/LoggerCommon.h>
#include <decaf/util/logging/Handler.h>
#include <decaf/lang/exceptions/NullPointerException.h>
#include <decaf/lang/exceptions/InvalidStateException.h>
#include <decaf/util/concurrent/Concurrent.h>
#include <decaf/util/Config.h>

namespace decaf{
namespace io{
    class OutputStream;
    class Writer;
}
namespace util{
namespace logging{

    class DECAF_API StreamHandler : public Handler {
    private:

        // OutputStream to write to
        decaf::io::OutputStream* stream;

        // A Writer to wrap the OutputStream
        decaf::io::Writer* writer;

        // Indicates if the writer has been initialized already
        bool writerNotInitialized;

    private:

        StreamHandler( const StreamHandler& );
        StreamHandler& operator= ( const StreamHandler& );

    public:

        StreamHandler();

        StreamHandler( decaf::io::OutputStream* stream, Formatter* formatter );

        virtual ~StreamHandler();

        virtual void close();

        virtual void flush();

        virtual void publish( const LogRecord& record );

        virtual bool isLoggable( const LogRecord& record ) const;

    protected:

        virtual void setOuputStream( decaf::io::OutputStream* stream );

        void close( bool closeStream );

    private:

        // Safely writes the string to the output stream, calling the ErrorManager
        // if any exceptions are thrown while writing.
        void write( const std::string& value );

        // Initialize the Writer if its not already been initialized.
        void initializeWritter();

    };

}}}

#endif /*_DECAF_UTIL_LOGGING_STREAMHANDLER_H_*/