Examples of com.sleepycat.persist.evolve.Mutations

com.sleepycat.persist.evolve.Mutations
mutations... StoreConfig config = new StoreConfig(); config.setMutations(mutations); EntityStore store = new EntityStore(env, "myStore", config);
Mutations cause data conversion to occur lazily as instances are read from the store. The {@link EntityStore#evolve EntityStore.evolve} methodmay also be used to perform eager conversion.

Not all incompatible class changes can be handled via mutations. For example, complex refactoring may require a transformation that manipulates multiple entity instances at once. Such changes are not possible with mutations but can made by performing a store conversion.
@see com.sleepycat.persist.evolve Class Evolution @author Mark Hayes


        try {
            initData = readData(txn);
            mutations = initData.mutations;
            if (mutations == null) {
                mutations = new Mutations();
            }


            /*
             * When the beta version is detected, force a re-write of the
             * catalog and disallow class changes.  This brings the catalog up

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                 "Converter is required when a complex type is changed " +
                 "to a simple type or enum type");
            return false;
        }
        ComplexFormat newFormat = (ComplexFormat) newFormatParam;
        Mutations mutations = evolver.getMutations();
        boolean thisChanged = false;
        boolean hierarchyChanged = false;
        Map<String, String> allKeyNameMap = new HashMap<String, String>();


        /* The Evolver has already ensured that entities evolve to entities. */
        assert isEntity() == newFormat.isEntity();
        assert isEntity() == (entityMeta != null);
        assert newFormat.isEntity() == (newFormat.entityMeta != null);


        /*
         * Keep track of the old and new entity class names for use in deleting
         * and renaming secondary keys below.  If the oldEntityClass is
         * non-null this also signifies an entity class or subclass.  Note that
         * getEntityFormat cannot be called on a newly created format during
         * evolution because its super format property is not yet initialized.
         * [#16253]
         */
        String oldEntityClass;
        String newEntityClass;
        if (isEntity()) {
            oldEntityClass = getClassName();
            newEntityClass = newFormat.getClassName();
        } else {
            oldEntityClass = null;
            newEntityClass = null;
        }


        /*
         * Evolve all superclass formats, even when a deleted class appears in
         * the hierarchy.  This ensures that the super format's
         * getLatestVersion/getComplexLatest method can be used accurately
         * below.
         */
        for (ComplexFormat oldSuper = getComplexSuper();
             oldSuper != null;
             oldSuper = oldSuper.getComplexSuper()) {
            Converter converter = mutations.getConverter
                (oldSuper.getClassName(), oldSuper.getVersion(), null);
            if (converter != null) {
                evolver.addMissingMutation
                    (this, newFormatParam,
                     "Converter is required for this subclass when a " +

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                                        List<FieldInfo> newFields,
                                        boolean isOldSecKeyField,
                                        List<FieldInfo> otherNewFields,
                                        ComplexFormat newFormat,
                                        Evolver evolver) {
        Mutations mutations = evolver.getMutations();
        boolean evolveFailure = false;
        boolean localEvolveNeeded = false;
        boolean readerNeeded = false;
        List<FieldReader> fieldReaders = new ArrayList<FieldReader>();
        FieldReader currentReader = null;
        int newFieldsMatched = 0;


        /*
         * Add FieldReaders to the list in old field storage order, since that
         * is the order in which field values must be read.
         */
        fieldLoop:
        for (int oldFieldIndex = 0;
             oldFieldIndex < oldFields.size();
             oldFieldIndex += 1) {


            FieldInfo oldField = oldFields.get(oldFieldIndex);
            String oldName = oldField.getName();
            SecondaryKeyMetadata oldMeta = null;
            if (isOldSecKeyField) {
                oldMeta = getSecondaryKeyMetadataByFieldName
                    (clsMeta.getSecondaryKeys(), oldName);
                assert oldMeta != null;
            }


            /* Get field mutations. */
            Renamer renamer = mutations.getRenamer
                (getClassName(), getVersion(), oldName);
            Deleter deleter = mutations.getDeleter
                (getClassName(), getVersion(), oldName);
            Converter converter = mutations.getConverter
                (getClassName(), getVersion(), oldName);
            if (deleter != null && (converter != null || renamer != null)) {
                evolver.addInvalidMutation
                    (this, newFormat, deleter,
                     "Field Deleter is not allowed along with a Renamer or " +

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            return 0;
        }


        @Override
        Mutations getMutations() {
            Mutations m = new Mutations();
            m.addDeleter(new Deleter(NAME, 0));
            return m;
        }

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            return 0;
        }


        @Override
        Mutations getMutations() {
            Mutations m = new Mutations();
            m.addDeleter(new Deleter(NAME, 0));
            return m;
        }

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            return 0;
        }


        @Override
        Mutations getMutations() {
            Mutations m = new Mutations();
            m.addDeleter(new Deleter(NAME, 0));
            return m;
        }

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        private static final String NAME2 =
            DeletedPersist1_ClassRemoved_NoMutation.class.getName();


        @Override
        Mutations getMutations() {
            Mutations m = new Mutations();
            m.addDeleter(new Deleter(NAME2, 0));
            return m;
        }

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        ConvertExample3_Address address;


        @Override
        Mutations getMutations() {
            Mutations m = new Mutations();
            Converter converter = new Converter
                (ConvertExample3_Person.class.getName(), 0,
                 new ConvertExample3_Conversion());
            m.addConverter(converter);
            return m;
        }

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        ConvertExample4_A embed;


        @Override
        Mutations getMutations() {
            Mutations m = new Mutations();
            Converter converter = new Converter
                (ConvertExample4_A.class.getName(), 0,
                 new Example4_Conversion());
            m.addConverter(converter);
            return m;
        }

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        ConvertExample5_Cat cat;
        ConvertExample5_Dog dog;


        @Override
        Mutations getMutations() {
            Mutations m = new Mutations();
            Converter converter = new Converter
                (ConvertExample5_Pet.class.getName(), 0,
                 new ConvertExample5_Conversion());
            m.addConverter(converter);
            return m;
        }

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Related Classes of com.sleepycat.persist.evolve.Mutations

com.sleepycat.persist.impl.ComplexFormat

com.sleepycat.persist.impl.PersistCatalog

com.sleepycat.persist.test.EvolveClasses$AllowChangeKeyMetadata

com.sleepycat.persist.test.EvolveClasses$AllowFieldAddDelete

com.sleepycat.persist.test.EvolveClasses$AllowFieldTypeChanges

com.sleepycat.persist.test.EvolveClasses$ArrayNameChange_Entity

com.sleepycat.persist.test.EvolveClasses$ConvertExample1_Entity

com.sleepycat.persist.test.EvolveClasses$ConvertExample2_Person

com.sleepycat.persist.test.EvolveClasses$ConvertExample3_Person

com.sleepycat.persist.test.EvolveClasses$ConvertExample4_Entity

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