68 lines
2.0 KiB
C#
68 lines
2.0 KiB
C#
namespace System.Web.Mvc.Async {
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using System;
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using System.Collections.Generic;
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using System.Threading;
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public class AsyncManager {
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private readonly SynchronizationContext _syncContext;
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// default timeout is 45 sec
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// from: http://msdn.microsoft.com/en-us/library/system.web.ui.page.asynctimeout.aspx
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private int _timeout = 45 * 1000;
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public AsyncManager()
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: this(null /* syncContext */) {
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}
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public AsyncManager(SynchronizationContext syncContext) {
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_syncContext = syncContext ?? SynchronizationContextUtil.GetSynchronizationContext();
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OutstandingOperations = new OperationCounter();
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OutstandingOperations.Completed += delegate { Finish(); };
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Parameters = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
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}
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public OperationCounter OutstandingOperations {
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get;
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private set;
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}
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public IDictionary<string, object> Parameters {
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get;
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private set;
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}
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public event EventHandler Finished;
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// the developer may call this function to signal that all operations are complete instead of
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// waiting for the operation counter to reach zero
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public virtual void Finish() {
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EventHandler handler = Finished;
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if (handler != null) {
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handler(this, EventArgs.Empty);
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}
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}
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// executes a callback in the current synchronization context, which gives access to HttpContext and related items
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public virtual void Sync(Action action) {
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_syncContext.Sync(action);
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}
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// measured in milliseconds, Timeout.Infinite means 'no timeout'
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public int Timeout {
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get {
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return _timeout;
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}
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set {
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if (value < -1) {
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throw Error.AsyncCommon_InvalidTimeout("value");
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}
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_timeout = value;
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}
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}
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}
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}
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