//******************************************************************************************************//  ActionAdapterCollection.cs - Gbtc////  Copyright © 2010, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the Eclipse Public License -v 1.0 (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.opensource.org/licenses/eclipse-1.0.php////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  09/02/2010 - J. Ritchie Carroll//       Generated original version of source code.////****************************************************************************************************** using System;using System.Collections.Concurrent;using System.Collections.Generic;using System.Text;using System.Threading; namespace GSF.TimeSeries.Adapters{    /// <summary>    /// Represents a collection of <see cref="IActionAdapter"/> implementations.    /// </summary>    public class ActionAdapterCollection : AdapterCollectionBase<IActionAdapter>, IActionAdapter    {        #region [ Members ]         // Events         /// <summary>        /// This event will be raised when there are new measurements available from the action adapter.        /// </summary>        /// <remarks>        /// <see cref="EventArgs{T}.Argument"/> is collection of new measurements for host to process.        /// </remarks>        public event EventHandler<EventArgs<ICollection<IMeasurement>>> NewMeasurements;         /// <summary>        /// This event is raised every five seconds allowing consumer to track current number of unpublished seconds of data in the queue.        /// </summary>        /// <remarks>        /// <see cref="EventArgs{T}.Argument"/> is the total number of unpublished seconds of data.        /// </remarks>        public event EventHandler<EventArgs<int>> UnpublishedSamples;         /// <summary>        /// This event is raised if there are any measurements being discarded during the sorting process.        /// </summary>        /// <remarks>        /// <see cref="EventArgs{T}.Argument"/> is the enumeration of <see cref="IMeasurement"/> values that are being discarded during the sorting process.        /// </remarks>        public event EventHandler<EventArgs<IEnumerable<IMeasurement>>> DiscardingMeasurements;         // Fields        private bool m_respectInputDemands;        private bool m_respectOutputDemands;         #endregion         #region [ Constructors ]         /// <summary>        /// Creates a new <see cref="ActionAdapterCollection"/>.        /// </summary>        public ActionAdapterCollection()            : this(null)        {            // When collection is spawned as an adapter, it needs a parameterless constructor        }         /// <summary>        /// Constructs a new instance of the <see cref="ActionAdapterCollection"/>.        /// </summary>        /// <param name="waitHandles">Wait handle dictionary.</param>        public ActionAdapterCollection(ConcurrentDictionary<string, AutoResetEvent> waitHandles)            : base(waitHandles)        {            base.Name = "Action Adapter Collection";            base.DataMember = "ActionAdapters";        }         #endregion         #region [ Properties ]         /// <summary>        /// Gets or sets flag indicating if action adapter should respect auto-start requests based on input demands.        /// </summary>        /// <remarks>        /// Action adapters are in the curious position of being able to both consume and produce points, as such the user needs to be able to control how their        /// adapter will behave concerning routing demands when the adapter is setup to connect on demand. In the case of respecting auto-start input demands,        /// as an example, this would be <c>false</c> for an action adapter that calculated measurement, but <c>true</c> for an action adapter used to archive inputs.        /// </remarks>        public virtual bool RespectInputDemands        {            get            {                return m_respectInputDemands;            }            set            {                m_respectInputDemands = value;            }        }         /// <summary>        /// Gets or sets flag indicating if action adapter should respect auto-start requests based on output demands.        /// </summary>        /// <remarks>        /// Action adapters are in the curious position of being able to both consume and produce points, as such the user needs to be able to control how their        /// adapter will behave concerning routing demands when the adapter is setup to connect on demand. In the case of respecting auto-start output demands,        /// as an example, this would be <c>true</c> for an action adapter that calculated measurement, but <c>false</c> for an action adapter used to archive inputs.        /// </remarks>        public virtual bool RespectOutputDemands        {            get            {                return m_respectOutputDemands;            }            set            {                m_respectOutputDemands = value;            }        }         /// <summary>        /// Gets the descriptive status of this <see cref="ActionAdapterCollection"/>.        /// </summary>        public override string Status        {            get            {                StringBuilder status = new StringBuilder();                 status.Append(base.Status);                status.AppendFormat("  Respecting input demands: {0}", RespectInputDemands);                status.AppendLine();                status.AppendFormat(" Respecting output demands: {0}", RespectOutputDemands);                status.AppendLine();                 return status.ToString();            }        }         #endregion         #region [ Methods ]         /// <summary>        /// Initializes the <see cref="ActionAdapterCollection"/>.        /// </summary>        public override void Initialize()        {            base.Initialize();             Dictionary<string, string> settings = Settings;            string setting;             if (settings.TryGetValue("respectInputDemands", out setting))                RespectInputDemands = setting.ParseBoolean();            else                RespectInputDemands = false;             if (settings.TryGetValue("respectOutputDemands", out setting))                RespectOutputDemands = setting.ParseBoolean();            else                RespectOutputDemands = true;        }         /// <summary>        /// Queues a collection of measurements for processing to each <see cref="IActionAdapter"/> implementation in        /// this <see cref="ActionAdapterCollection"/>.        /// </summary>        /// <param name="measurements">Measurements to queue for processing.</param>        public virtual void QueueMeasurementsForProcessing(IEnumerable<IMeasurement> measurements)        {            try            {                lock (this)                {                    foreach (IActionAdapter item in this)                    {                        if (item.Enabled)                            item.QueueMeasurementsForProcessing(measurements);                    }                }            }            catch (Exception ex)            {                OnProcessException(new InvalidOperationException("Failed to queue measurements to action adapters: " + ex.Message, ex));            }        }         /// <summary>        /// Raises the <see cref="NewMeasurements"/> event.        /// </summary>        /// <param name="measurements">New measurements.</param>        protected virtual void OnNewMeasurements(ICollection<IMeasurement> measurements)        {            try            {                if (NewMeasurements != null)                    NewMeasurements(this, new EventArgs<ICollection<IMeasurement>>(measurements));            }            catch (Exception ex)            {                // We protect our code from consumer thrown exceptions                OnProcessException(new InvalidOperationException(string.Format("Exception in consumer handler for NewMeasurements event: {0}", ex.Message), ex));            }        }         /// <summary>        /// Raises the <see cref="UnpublishedSamples"/> event.        /// </summary>        /// <param name="unpublishedSamples">Total number of unpublished seconds of data in the queue.</param>        protected virtual void OnUnpublishedSamples(int unpublishedSamples)        {            try            {                if (UnpublishedSamples != null)                    UnpublishedSamples(this, new EventArgs<int>(unpublishedSamples));            }            catch (Exception ex)            {                // We protect our code from consumer thrown exceptions                OnProcessException(new InvalidOperationException(string.Format("Exception in consumer handler for UnpublishedSamples event: {0}", ex.Message), ex));            }        }         /// <summary>        /// Raises the <see cref="DiscardingMeasurements"/> event.        /// </summary>        /// <param name="measurements">Enumeration of <see cref="IMeasurement"/> values being discarded.</param>        protected virtual void OnDiscardingMeasurements(IEnumerable<IMeasurement> measurements)        {            try            {                if (DiscardingMeasurements != null)                    DiscardingMeasurements(this, new EventArgs<IEnumerable<IMeasurement>>(measurements));            }            catch (Exception ex)            {                // We protect our code from consumer thrown exceptions                OnProcessException(new InvalidOperationException(string.Format("Exception in consumer handler for DiscardingMeasurements event: {0}", ex.Message), ex));            }        }         /// <summary>        /// Wires events and initializes new <see cref="IActionAdapter"/> implementation.        /// </summary>        /// <param name="item">New <see cref="IActionAdapter"/> implementation.</param>        protected override void InitializeItem(IActionAdapter item)        {            if (item != null)            {                // Wire up events                item.NewMeasurements += item_NewMeasurements;                item.UnpublishedSamples += item_UnpublishedSamples;                item.DiscardingMeasurements += item_DiscardingMeasurements;                base.InitializeItem(item);            }        }         /// <summary>        /// Unwires events and disposes of <see cref="IActionAdapter"/> implementation.        /// </summary>        /// <param name="item"><see cref="IActionAdapter"/> to dispose.</param>        protected override void DisposeItem(IActionAdapter item)        {            if (item != null)            {                // Un-wire events                item.NewMeasurements -= item_NewMeasurements;                item.UnpublishedSamples -= item_UnpublishedSamples;                item.DiscardingMeasurements -= item_DiscardingMeasurements;                base.DisposeItem(item);            }        }         // Raise new measurements event on behalf of each item in collection        private void item_NewMeasurements(object sender, EventArgs<ICollection<IMeasurement>> e)        {            if (NewMeasurements != null)                NewMeasurements(sender, e);        }         // Raise unpublished samples event on behalf of each item in collection        private void item_UnpublishedSamples(object sender, EventArgs<int> e)        {            if (UnpublishedSamples != null)                UnpublishedSamples(sender, e);        }         // Raise discarding measurements event on behalf of each item in collection        private void item_DiscardingMeasurements(object sender, EventArgs<IEnumerable<IMeasurement>> e)        {            if (DiscardingMeasurements != null)                DiscardingMeasurements(sender, e);        }         #endregion    }}