Increment by N, return current

Atomically adds the given value to the current value and returns the updated (current) value of the counter. Multiple concurrent client requests are guaranteed to return updated value.

// *******************************************
// synchronous methods
// *******************************************

// Backendless.Counters approach
public int Backendless.Counters.AddAndGet( String counterName, Int64 value );
public T Backendless.Counters.AddAndGet<T>( String counterName, Int64 value );

// IAtomic approach
IAtomic<T> counter = Backendless.Counters.Of<T>( String counterName );
public T counter.AddAndGet( Int64 value );

// *******************************************
// asynchronous methods
// *******************************************

// Backendless.Counters approach
public void Backendless.Counters.AddAndGet<T>( String counterName, Int64 value, AsyncCallback<T> callback );

// IAtomic approach
IAtomic<T> counter = Backendless.Counters.Of<T>( String counterName );
public void counter.AddAndGet( Int64 value, AsyncCallback<T> callback );

where:

Argument	Description
counterName	name of the counter to increment.
value	number to add to the current counter value
T	numeric type for the counter values. Can be an instance of byte, short, int, float, long and double.
callback	the callback used for asynchronous calls to indicate that the operation has either successfully completed or resulted in error.

Example

AsyncCallback<int> callback = new AsyncCallback<int>(
  result =>
  {
    System.Console.WriteLine( "[ASYNC] current counter value is - " + result );
  },
  fault =>
  {
     System.Console.WriteLine( "Error - " + fault );
  } );

Backendless.Counters.AddAndGet( "my counter", 1000, callback );

IAtomic<int> myCounter = Backendless.Counters.Of<int>( "my counter" );
int counter = myCounter.AddAndGet( 1000 );
System.Console.WriteLine( "[SYNC] current counter value through IAtomic is - " + counter );

counter = Backendless.Counters.AddAndGet( "my counter", 1000 );
System.Console.WriteLine( "[SYNC] current counter value is - " + counter );

long longCounter = Backendless.Counters.AddAndGet<long>( "my counter", 1000 );
System.Console.WriteLine( "[SYNC] current counter value is - " + longCounter );