/// <summary> /// Atomically adds a new item to the map. /// If the key already exists then the Fail handler is called with the unaltered map /// and the value already set for the key, it expects a new map returned. /// </summary> /// <remarks>Null is not allowed for a Key or a Value</remarks> /// <param name="key">Key</param> /// <param name="value">Value</param> /// <param name="Fail">Delegate to handle failure, you're given the unaltered map /// and the value already set for the key</param> /// <exception cref="ArgumentNullException">Throws ArgumentNullException the key or value are null</exception> /// <returns>New Map with the item added</returns> public static Map <K, V> tryAdd <K, V>(Map <K, V> map, K key, V value, Func <Map <K, V>, V, Map <K, V> > Fail) => map.TryAdd(key, value, Fail);
/// <summary> /// Attempts to set a meta-data item. If it is already set, nothing /// happens. /// /// This is for extending the default strategies behaviours and /// allows for state to survive in-between Process errors /// </summary> public StrategyState TrySetMetaData <T>(string key, T value) => With(Metadata: Metadata.TryAdd(key, value));
/// <summary> /// Atomically adds a new item to the map. /// If the key already exists, then the new item is ignored /// </summary> /// <remarks>Null is not allowed for a Key or a Value</remarks> /// <param name="key">Key</param> /// <param name="value">Value</param> /// <exception cref="ArgumentNullException">Throws ArgumentNullException the key or value are null</exception> /// <returns>New Map with the item added</returns> public static Map <K, V> tryAdd <K, V>(Map <K, V> map, K key, V value) => map.TryAdd(key, value);
