C# GrainReference.GetPrimaryKey方法代码示例

        /// <summary>
        /// Extracts a grain ID as a string and appends the key extension with '#' infix is present.
        /// </summary>
        /// <param name="grainReference">The reference from which to extract the ID.</param>
        /// <returns>The grain ID as a string.</returns>
        /// <remarks>This likely should exist in Orleans core in more optimized form.</remarks>
        private static AdoGrainKey GrainIdAndExtensionAsString(GrainReference grainReference)
        {
            //Kudos for https://github.com/tsibelman for the algorithm. See more at https://github.com/dotnet/orleans/issues/1905.
            string keyExtension;
            AdoGrainKey key;
            if(grainReference.IsPrimaryKeyBasedOnLong())
            {
                key = new AdoGrainKey(grainReference.GetPrimaryKeyLong(out keyExtension), keyExtension);
            }
            else
            {
                key = new AdoGrainKey(grainReference.GetPrimaryKey(out keyExtension), keyExtension);
            }

            return key;
        }

        /// <summary>
        /// Removes grain state from its backing store, if found.
        /// </summary>
        /// <param name="grainType">A string holding the name of the grain class.</param>
        /// <param name="grainReference">Represents the long-lived identity of the grain.</param>
        /// <param name="grainState">An object holding the persisted state of the grain.</param>
        /// <returns></returns>
        public Task ClearStateAsync(string grainType, GrainReference grainReference, GrainState grainState)
        {
            if (DataManager == null) throw new ArgumentException("DataManager property not initialized");

            string extendKey;

            var key = this.UseGuidAsStorageKey ? grainReference.GetPrimaryKey(out extendKey).ToString() : grainReference.ToKeyString();

            return DataManager.DeleteAsync(grainType, key);
        }

        /// <summary>
        /// Writes the persisted state from a grain state object into its backing store.
        /// </summary>
        /// <param name="grainType">A string holding the name of the grain class.</param>
        /// <param name="grainReference">Represents the long-lived identity of the grain.</param>
        /// <param name="grainState">A reference to an object holding the persisted state of the grain.</param>
        /// <returns>Completion promise for this operation.</returns>
        public Task WriteStateAsync(string grainType, GrainReference grainReference, IGrainState grainState)
        {
            if (DataManager == null) throw new ArgumentException("DataManager property not initialized");
            var entityData = ConvertToStorageFormat(grainType, grainState);

            string extendKey;

            var key = this.UseGuidAsStorageKey ? grainReference.GetPrimaryKey(out extendKey).ToString() : grainReference.ToKeyString();

            return DataManager.WriteAsync(key, entityData);
        }

        /// <summary>
        /// Reads persisted state from the backing store and deserializes it into the the target
        /// grain state object.
        /// </summary>
        /// <param name="grainType">A string holding the name of the grain class.</param>
        /// <param name="grainReference">Represents the long-lived identity of the grain.</param>
        /// <param name="grainState">A reference to an object to hold the persisted state of the grain.</param>
        /// <returns>Completion promise for this operation.</returns>
        public async Task ReadStateAsync(string grainType, GrainReference grainReference, GrainState grainState)
        {
            if (DataManager == null) throw new ArgumentException("DataManager property not initialized");

            string extendKey;

            var key = this.UseGuidAsStorageKey ? grainReference.GetPrimaryKey(out extendKey).ToString() : grainReference.ToKeyString();

            var entityData = await DataManager.ReadAsync(grainType, key);

            if (!string.IsNullOrEmpty(entityData))
            {
                ConvertFromStorageFormat(grainState, entityData);
            }
        }

        private static string GetKey(GrainReference grainReference)
        {
            string keyAsString = null;
            string keyExt = null;

            bool success = false;

            try
            {
                keyAsString = grainReference.GetPrimaryKeyLong().ToString();
                success = true;
            }
            catch
            {
                success = false;
            }
            try
            {
                keyAsString = grainReference.GetPrimaryKey().ToString();
                success = true;
            }
            catch
            {
                success = false;
            }
            if (!success)
            {
                keyAsString = grainReference.GetPrimaryKey(out keyExt).ToString();

                if (keyExt.Length > 0) //using string extension to guid, so we use the string!
                    keyAsString = keyExt;
            }

            if (keyAsString == null || keyAsString.Length == 0)
                throw new Exception(string.Format("MySQLStorage could not deduce key for grain reference {0}",
                    grainReference.ToString()));
            return keyAsString;
        }