Oracle Coherence for C++ API
Release 3.6.0.0
E15728-01

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# coherence/util/transformer/SemiLiteEventTransformer.hpp

    00001 /*
    00002 * SemiLiteEventTransformer.hpp
    00003 *
    00004 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
    00005 *
    00006 * Oracle is a registered trademarks of Oracle Corporation and/or its
    00007 * affiliates.
    00008 *
    00009 * This software is the confidential and proprietary information of Oracle
    00010 * Corporation. You shall not disclose such confidential and proprietary
    00011 * information and shall use it only in accordance with the terms of the
    00012 * license agreement you entered into with Oracle.
    00013 *
    00014 * This notice may not be removed or altered.
    00015 */
    00016 #ifndef COH_SEMI_LITE_EVENT_TRANSFORMER_HPP
    00017 #define COH_SEMI_LITE_EVENT_TRANSFORMER_HPP
    00018
    00019 #include "coherence/lang.ns"
    00020
    00021 #include "coherence/io/pof/PofReader.hpp"
    00022 #include "coherence/io/pof/PofWriter.hpp"
    00023 #include "coherence/io/pof/PortableObject.hpp"
    00024 #include "coherence/util/MapEvent.hpp"
    00025 #include "coherence/util/MapEventTransformer.hpp"
    00026
    00027 COH_OPEN_NAMESPACE3(coherence,util,transformer)
    00028
    00029 using coherence::io::pof::PofReader;
    00030 using coherence::io::pof::PofWriter;
    00031 using coherence::io::pof::PortableObject;
    00032
    00033
    00034 /**
    00035 * SemiLiteEventTransformer is a special purpose MapEventTransformer
    00036 * implementation that removes an OldValue from the MapEvent object for the
    00037 * purpose of reducing the amount of data that has to be sent over the network
    00038 * to event consumers.
    00039 *
    00040 * Usage example:
    00041 * <pre>
    00042 *    cache->addMapListener(listener, MapEventTransformerFilter::create(NULL,
    00043 *        SemiLiteEventTransformer::getInstance(), false);
    00044 * </pre>
    00045 *
    00046 * @author djl  2008.06.17
    00047 */
    00048 class COH_EXPORT SemiLiteEventTransformer
    00049     : public class_spec<SemiLiteEventTransformer,
    00050         extends<Object>,
    00051         implements<PortableObject, MapEventTransformer> >
    00052     {
    00053     friend class factory<SemiLiteEventTransformer>;
    00054
    00055     // ----- constructors ---------------------------------------------------
    00056
    00057     protected:
    00058         /**
    00059         * Default constructor (necessary for the PortableObject interface).
    00060         */
    00061         SemiLiteEventTransformer();
    00062
    00063
    00064     // ----- MapEventTransformer interface ----------------------------------
    00065
    00066     public:
    00067         /**
    00068          * {@inheritDoc}
    00069          */
    00070         virtual MapEvent::Handle transform(MapEvent::Handle hEvent) const;
    00071
    00072
    00073     // ----- PortableObject interface ---------------------------------------
    00074
    00075     public:
    00076         /**
    00077         * {@inheritDoc}
    00078         */
    00079         virtual void readExternal(PofReader::Handle hIn);
    00080
    00081         /**
    00082         * {@inheritDoc}
    00083         */
    00084         virtual void writeExternal(PofWriter::Handle hOut) const;
    00085
    00086
    00087     // ----- Object interface -----------------------------------------------
    00088
    00089     public:
    00090         /**
    00091         * {@inheritDoc}
    00092         */
    00093         virtual bool equals(Object::View v) const;
    00094
    00095         /**
    00096         * {@inheritDoc}
    00097         */
    00098         virtual size32_t hashCode() const;
    00099
    00100         /**
    00101         * {@inheritDoc}
    00102         */
    00103         virtual void toStream(std::ostream& out) const;
    00104
    00105
    00106     // ----- constants ------------------------------------------------------
    00107
    00108     public:
    00109         /**
    00110         * The SemiLiteEventTransformer singleton.
    00111         */
    00112         static SemiLiteEventTransformer::Handle getInstance();
    00113     };
    00114
    00115 COH_CLOSE_NAMESPACE3
    00116
    00117 #endif // COH_SEMI_LITE_EVENT_TRANSFORMER_HPP

Copyright © 2000, 2010, Oracle and/or its affiliates. All rights reserved.