Examples of org.apache.openjpa.lib.util.concurrent.ConcurrentReferenceHashMap

Package org.apache.openjpa.lib.util.concurrent

Examples of org.apache.openjpa.lib.util.concurrent.ConcurrentReferenceHashMap

org.apache.openjpa.lib.util.concurrent.ConcurrentReferenceHashMap
This class implements a HashMap which has limited synchronization and reference keys or values(but not both). In particular mutators are generally synchronized while accessors are generally not. Additionally the Iterators returned by this class are not "fail-fast", but instead try to continue to iterate over the data structure after changes have been made. Finally purging of the reference queue is only done inside mutators. Null keys are not supported if keys use references. Null values are not supported if values use references. This class is based heavily on the WeakHashMap class in the Java collections package.

            return false;


        Boolean isAssignable = null;
        Map assignableTo = (Map) _assignableTypes.get(from);
        if (assignableTo == null) { // "to" cache doesn't exist, so create it...
            assignableTo = new ConcurrentReferenceHashMap(ReferenceMap.WEAK,
                    ReferenceMap.HARD);
            _assignableTypes.put(from, assignableTo);
        } else { // "to" cache exists...
            isAssignable = (Boolean) assignableTo.get(to);
        }

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            cacheMap = new ConcurrentHashMap(size, load) {
                public void overflowRemoved(Object key, Object value) {
                    cacheMapOverflowRemoved(key, value);
                }
            };
            softMap = new ConcurrentReferenceHashMap(ReferenceMap.HARD,
                ReferenceMap.SOFT, size, load) {
                public void overflowRemoved(Object key, Object value) {
                    softMapOverflowRemoved(key, value);
                }

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    private static void setGetterMethod(Class<?> cls, String prop,
        Method method) {
        Map<String, Method> clsMap = getterMethodCache.get(cls);
        if (clsMap == null) {
            clsMap = new ConcurrentReferenceHashMap(ReferenceMap.HARD,
                ReferenceMap.WEAK);
            getterMethodCache.put(cls, clsMap);
        }
        clsMap.put(prop, method);
    }

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    private static void setSetterMethod(Class<?> cls, String prop,
        Method method) {
        Map<String, Method> clsMap = setterMethodCache.get(cls);
        if (clsMap == null) {
            clsMap = new ConcurrentReferenceHashMap(ReferenceMap.HARD,
                ReferenceMap.WEAK);
            setterMethodCache.put(cls, clsMap);
        }
        clsMap.put(prop, method);
    }

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        public Default() {
            initializeMaps();
        }


        private void initializeMaps() {
            ConcurrentReferenceHashMap statsMap =
                new ConcurrentReferenceHashMap(ReferenceMap.HARD, ReferenceMap.HARD, CONCURRENCY, LOAD_FACTOR);
            statsMap.setMaxSize(FIXED_SIZE);
            stats = statsMap;


            ConcurrentReferenceHashMap aStatsMap =
                new ConcurrentReferenceHashMap(ReferenceMap.HARD, ReferenceMap.HARD, CONCURRENCY, LOAD_FACTOR);
            aStatsMap.setMaxSize(FIXED_SIZE);
            astats = aStatsMap;
        }

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    public Default() {
            initializeMaps();
        }


        private void initializeMaps() {
            ConcurrentReferenceHashMap statsMap =
                new ConcurrentReferenceHashMap(ReferenceMap.HARD, ReferenceMap.HARD, CONCURRENCY, LOAD_FACTOR);
            statsMap.setMaxSize(FIXED_SIZE);
            stats = statsMap;


            ConcurrentReferenceHashMap aStatsMap =
                new ConcurrentReferenceHashMap(ReferenceMap.HARD, ReferenceMap.HARD, CONCURRENCY, LOAD_FACTOR);
            aStatsMap.setMaxSize(FIXED_SIZE);
            astats = aStatsMap;
        }

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    public CacheMap(boolean lru, int max, int size, float load,
        int concurrencyLevel) {
        if (size < 0)
            size = 500;


        softMap = new ConcurrentReferenceHashMap(ReferenceMap.HARD,
            ReferenceMap.SOFT, size, load) {
            public void overflowRemoved(Object key, Object value) {
                softMapOverflowRemoved(key, value);
            }

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    private static void setGetterMethod(Class<?> cls, String prop,
        Method method) {
        Map<String, Method> clsMap = getterMethodCache.get(cls);
        if (clsMap == null) {
            clsMap = new ConcurrentReferenceHashMap(ReferenceMap.HARD,
                ReferenceMap.WEAK);
            getterMethodCache.put(cls, clsMap);
        }
        clsMap.put(prop, method);
    }

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    private static void setSetterMethod(Class<?> cls, String prop,
        Method method) {
        Map<String, Method> clsMap = setterMethodCache.get(cls);
        if (clsMap == null) {
            clsMap = new ConcurrentReferenceHashMap(ReferenceMap.HARD,
                ReferenceMap.WEAK);
            setterMethodCache.put(cls, clsMap);
        }
        clsMap.put(prop, method);
    }

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    public CacheMap(boolean lru, int max, int size, float load,
        int concurrencyLevel) {
        if (size < 0)
            size = 500;


        softMap = new ConcurrentReferenceHashMap(ReferenceMap.HARD,
            ReferenceMap.SOFT, size, load) {
            public void overflowRemoved(Object key, Object value) {
                softMapOverflowRemoved(key, value);
            }

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