Class Integer

src/main/java/org/mapdb/Atomic.java:109–320

An int record that may be updated atomically. An Atomic@Integer is used in applications such as atomically incremented counters, and cannot be used as a replacement for an java.lang.Integer. However, this class does extend Number to allow uniform access by tools and

     * deal with numerically-based classes.
     */
    public final static class Integer extends Number {

		private static final long serialVersionUID = 4615119399830853054L;
		
		protected final Store store;
        protected final long recid;

        public Integer(Store store, long recid) {
            this.store = store;
            this.recid = recid;
        }

        /**
         * @return recid under which value is saved
         */
        public long getRecid(){
            return recid;
        }

        /**
         * Gets the current value.
         *
         * @return the current value
         */
        public final int get() {
            return store.get(recid, Serializer.INTEGER);
        }

        /**
         * Sets to the given value.
         *
         * @param newValue the new value
         */
        public final void set(int newValue) {
            store.update(recid, newValue, Serializer.INTEGER);
        }


        /**
         * Atomically sets to the given value and returns the old value.
         *
         * @param newValue the new value
         * @return the previous value
         */
        public final int getAndSet(int newValue) {
            //$DELAY$
            for (;;) {
                int current = get();
                //$DELAY$
                if (compareAndSet(current, newValue)) {
                    //$DELAY$
                    return current;
                }
            }
        }

        /**
         * Atomically sets the value to the given updated value