Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / RunTime / WorkBatch.cs / 1305376 / WorkBatch.cs
#pragma warning disable 1634, 1691 using System; using System.Diagnostics; using System.Transactions; using System.Collections; using System.Collections.Generic; using System.Workflow.Runtime.Hosting; namespace System.Workflow.Runtime { #region Runtime Batch Implementation #region WorkBatch internal enum WorkBatchState { Usable, Merged, Completed } ////// Summary description for Work Batching. /// internal sealed class WorkBatch: IWorkBatch, IDisposable { private PendingWorkCollection _pendingWorkCollection; private object mutex = new object(); private WorkBatchState _state; private WorkBatchCollection _collection = null; private WorkBatch() { } internal WorkBatch(WorkBatchCollection workBackCollection) { _pendingWorkCollection = new PendingWorkCollection(); _state = WorkBatchState.Usable; _collection = workBackCollection; } internal int Count { get { return _pendingWorkCollection.WorkItems.Count; } } internal void SetWorkBatchCollection(WorkBatchCollection workBatchCollection) { _collection = workBatchCollection; } #region IWorkBatch Implementation ////// Add Work to Batch /// /// /// void IWorkBatch.Add(IPendingWork work, object workItem) { if (_pendingWorkCollection == null) throw new ObjectDisposedException("WorkBatch"); lock (this.mutex) { System.Diagnostics.Debug.Assert(this._state == WorkBatchState.Usable, "Trying to add to unusable batch."); _pendingWorkCollection.Add(work, _collection.GetNextWorkItemOrderId(work), workItem); } } #endregion #region Internal Implementation internal bool IsDirty { get { return this._pendingWorkCollection.IsDirty; } } ////// This one commits all the pending work and its items /// added so far in this batch. /// /// internal void Commit(Transaction transaction) { lock (this.mutex) { _pendingWorkCollection.Commit(transaction); } } ////// This one completes the pending work /// /// internal void Complete(bool succeeded) { lock (this.mutex) { if (this._pendingWorkCollection.IsUsable) { _pendingWorkCollection.Complete(succeeded); _pendingWorkCollection.Dispose(); this._state = WorkBatchState.Completed; } } } ////// API for Runtime to call to do Merge Operation: Right now /// we dont use this because we dont support incoming work collection. /// /// internal void Merge(WorkBatch batch) { if (batch == null) return; //nothing to merge if (_pendingWorkCollection == null) throw new ObjectDisposedException("WorkBatch"); lock (this.mutex) { lock (batch.mutex) { foreach (KeyValuePair> item in batch._pendingWorkCollection.WorkItems) { //_pendingWorkCollection.AddRange(item.Key, item.Value); SortedList newItems = item.Value; foreach (KeyValuePair kvp in newItems) _pendingWorkCollection.Add(item.Key, kvp.Key, kvp.Value); } } this._state = WorkBatchState.Merged; } } #endregion #region IDisposable Members public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } private void Dispose(bool disposing) { if (disposing) { _pendingWorkCollection.Dispose(); _pendingWorkCollection = null; } } #endregion #region PendingWorkCollection implementation /// /// Pending Work Implementation /// internal sealed class PendingWorkCollection : IDisposable { Dictionary> Items; #region Internal Implementation internal PendingWorkCollection() { Items = new Dictionary >(); } internal Dictionary > WorkItems { get { return Items; } } internal bool IsUsable { get { return this.Items != null; } } internal bool IsDirty { get { if (!this.IsUsable) return false; // // Loop through all pending work items in the collection // If any of them assert that they need to commit than the batch is dirty foreach (KeyValuePair > workItem in this.WorkItems) { try { IPendingWork work = workItem.Key; if (work.MustCommit(workItem.Value)) return true; } catch (Exception e) { if (WorkflowExecutor.IsIrrecoverableException(e)) { #pragma warning disable 56503 throw; #pragma warning restore 56503 } else { // Ignore exceptions and treat condition as false return value; } } } // // If no one asserted that they need to commit we're not dirty return false; } } internal void Add(IPendingWork work, long orderId, object workItem) { SortedList workItems = null; if (!Items.TryGetValue(work, out workItems)) { workItems = new SortedList (); Items.Add(work, workItems); } Debug.Assert(!workItems.ContainsKey(orderId), string.Format(System.Globalization.CultureInfo.InvariantCulture, "List already contains key {0}", orderId)); workItems.Add(orderId, workItem); WorkflowTrace.Runtime.TraceEvent(TraceEventType.Information, 0, "pending work hc {0} added workItem hc {1}", work.GetHashCode(), workItem.GetHashCode()); } //Commit All Pending Work internal void Commit(Transaction transaction) { //ignore items param foreach (KeyValuePair > workItem in Items) { IPendingWork work = workItem.Key; List
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