# Source: vertx-js/counter.js

    /*
     * Copyright 2014 Red Hat, Inc.
     *
     * Red Hat 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.
     */

    /** @module vertx-js/counter */
    var utils = require('vertx-js/util/utils');

    var io = Packages.io;
    var JsonObject = io.vertx.core.json.JsonObject;
    var JCounter = Java.type('io.vertx.core.shareddata.Counter');

    /**
     An asynchronous counter that can be used to across the cluster to maintain a consistent count.
     <p>

     @class
    */
    var Counter = function(j_val) {

      var j_counter = j_val;
      var that = this;

      /**
       Get the current value of the counter

       @public
       @param resultHandler {function} handler which will be passed the value
       */
      this.get = function(resultHandler) {
        var __args = arguments;
        if (__args.length === 1 && typeof __args[0] === 'function') {
          j_counter["get(io.vertx.core.Handler)"](function(ar) {
          if (ar.succeeded()) {
            resultHandler(utils.convReturnLong(ar.result()), null);
          } else {
            resultHandler(null, ar.cause());
          }
        });
        } else throw new TypeError('function invoked with invalid arguments');
      };

      /**
       Increment the counter atomically and return the new count

       @public
       @param resultHandler {function} handler which will be passed the value
       */
      this.incrementAndGet = function(resultHandler) {
        var __args = arguments;
        if (__args.length === 1 && typeof __args[0] === 'function') {
          j_counter["incrementAndGet(io.vertx.core.Handler)"](function(ar) {
          if (ar.succeeded()) {
            resultHandler(utils.convReturnLong(ar.result()), null);
          } else {
            resultHandler(null, ar.cause());
          }
        });
        } else throw new TypeError('function invoked with invalid arguments');
      };

      /**
       Increment the counter atomically and return the value before the increment.

       @public
       @param resultHandler {function} handler which will be passed the value
       */
      this.getAndIncrement = function(resultHandler) {
        var __args = arguments;
        if (__args.length === 1 && typeof __args[0] === 'function') {
          j_counter["getAndIncrement(io.vertx.core.Handler)"](function(ar) {
          if (ar.succeeded()) {
            resultHandler(utils.convReturnLong(ar.result()), null);
          } else {
            resultHandler(null, ar.cause());
          }
        });
        } else throw new TypeError('function invoked with invalid arguments');
      };

      /**
       Decrement the counter atomically and return the new count

       @public
       @param resultHandler {function} handler which will be passed the value
       */
      this.decrementAndGet = function(resultHandler) {
        var __args = arguments;
        if (__args.length === 1 && typeof __args[0] === 'function') {
          j_counter["decrementAndGet(io.vertx.core.Handler)"](function(ar) {
          if (ar.succeeded()) {
            resultHandler(utils.convReturnLong(ar.result()), null);
          } else {
            resultHandler(null, ar.cause());
          }
        });
        } else throw new TypeError('function invoked with invalid arguments');
      };

      /**
       Add the value to the counter atomically and return the new count

       @public
       @param value {number} the value to add
       @param resultHandler {function} handler which will be passed the value
       */
      this.addAndGet = function(value, resultHandler) {
        var __args = arguments;
        if (__args.length === 2 && typeof __args[0] ==='number' && typeof __args[1] === 'function') {
          j_counter["addAndGet(long,io.vertx.core.Handler)"](value, function(ar) {
          if (ar.succeeded()) {
            resultHandler(utils.convReturnLong(ar.result()), null);
          } else {
            resultHandler(null, ar.cause());
          }
        });
        } else throw new TypeError('function invoked with invalid arguments');
      };

      /**
       Add the value to the counter atomically and return the value before the add

       @public
       @param value {number} the value to add
       @param resultHandler {function} handler which will be passed the value
       */
      this.getAndAdd = function(value, resultHandler) {
        var __args = arguments;
        if (__args.length === 2 && typeof __args[0] ==='number' && typeof __args[1] === 'function') {
          j_counter["getAndAdd(long,io.vertx.core.Handler)"](value, function(ar) {
          if (ar.succeeded()) {
            resultHandler(utils.convReturnLong(ar.result()), null);
          } else {
            resultHandler(null, ar.cause());
          }
        });
        } else throw new TypeError('function invoked with invalid arguments');
      };

      /**
       Set the counter to the specified value only if the current value is the expectec value. This happens
       atomically.

       @public
       @param expected {number} the expected value
       @param value {number} the new value
       @param resultHandler {function} the handler will be passed true on success
       */
      this.compareAndSet = function(expected, value, resultHandler) {
        var __args = arguments;
        if (__args.length === 3 && typeof __args[0] ==='number' && typeof __args[1] ==='number' && typeof __args[2] === 'function') {
          j_counter["compareAndSet(long,long,io.vertx.core.Handler)"](expected, value, function(ar) {
          if (ar.succeeded()) {
            resultHandler(ar.result(), null);
          } else {
            resultHandler(null, ar.cause());
          }
        });
        } else throw new TypeError('function invoked with invalid arguments');
      };

      // A reference to the underlying Java delegate
      // NOTE! This is an internal API and must not be used in user code.
      // If you rely on this property your code is likely to break if we change it / remove it without warning.
      this._jdel = j_counter;
    };

    Counter._jclass = utils.getJavaClass("io.vertx.core.shareddata.Counter");
    Counter._jtype = {
      accept: function(obj) {
        return Counter._jclass.isInstance(obj._jdel);
      },
      wrap: function(jdel) {
        var obj = Object.create(Counter.prototype, {});
        Counter.apply(obj, arguments);
        return obj;
      },
      unwrap: function(obj) {
        return obj._jdel;
      }
    };
    Counter._create = function(jdel) {
      var obj = Object.create(Counter.prototype, {});
      Counter.apply(obj, arguments);
      return obj;
    }
    module.exports = Counter;