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//------------------------------------------------------------------------------
// <copyright file="DefaultWorkflowTransactionService.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
using System;
using System.Transactions;
using System.Collections.Specialized;
using System.Diagnostics;
using System.Configuration;
namespace System.Workflow.Runtime.Hosting
{
/// <summary> A simple TransactionService that creates
/// <c>System.Transactions.CommittableTransaction</c>.</summary>
[Obsolete("The System.Workflow.* types are deprecated. Instead, please use the new types from System.Activities.*")]
public class DefaultWorkflowCommitWorkBatchService : WorkflowCommitWorkBatchService
{
private bool _enableRetries = false;
private bool _ignoreCommonEnableRetries = false;
public DefaultWorkflowCommitWorkBatchService()
{
}
public DefaultWorkflowCommitWorkBatchService(NameValueCollection parameters)
{
if (parameters == null)
throw new ArgumentNullException("parameters", ExecutionStringManager.MissingParameters);
if (parameters.Count > 0)
{
foreach (string key in parameters.Keys)
{
if (0 == string.Compare("EnableRetries", key, StringComparison.OrdinalIgnoreCase))
{
_enableRetries = bool.Parse(parameters[key]);
_ignoreCommonEnableRetries = true;
}
}
}
}
public bool EnableRetries
{
get { return _enableRetries; }
set
{
_enableRetries = value;
_ignoreCommonEnableRetries = true;
}
}
protected internal override void Start()
{
WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "DefaultWorkflowCommitWorkBatchService: Starting");
//
// If we didn't find a local value for enable retries
// check in the common section
if ((!_ignoreCommonEnableRetries) && (null != base.Runtime))
{
NameValueConfigurationCollection commonConfigurationParameters = base.Runtime.CommonParameters;
if (commonConfigurationParameters != null)
{
// Then scan for connection string in the common configuration parameters section
foreach (string key in commonConfigurationParameters.AllKeys)
{
if (string.Compare("EnableRetries", key, StringComparison.OrdinalIgnoreCase) == 0)
{
_enableRetries = bool.Parse(commonConfigurationParameters[key].Value);
break;
}
}
}
}
base.Start();
}
protected override void OnStopped()
{
WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "DefaultWorkflowCommitWorkBatchService: Stopping");
base.OnStopped();
}
internal protected override void CommitWorkBatch(CommitWorkBatchCallback commitWorkBatchCallback)
{
DbRetry dbRetry = new DbRetry(_enableRetries);
short retryCounter = 0;
while (true)
{
if (null != Transaction.Current)
{
//
// Can't retry as we don't own the tx
// Set the counter to only allow one iteration
retryCounter = dbRetry.MaxRetries;
}
try
{
base.CommitWorkBatch(commitWorkBatchCallback);
break;
}
catch (Exception e)
{
WorkflowTrace.Host.TraceEvent(TraceEventType.Error, 0, "DefaultWorkflowCommitWorkBatchService caught exception from commitWorkBatchCallback: " + e.ToString());
if (dbRetry.TryDoRetry(ref retryCounter))
{
WorkflowTrace.Host.TraceEvent(TraceEventType.Information, 0, "DefaultWorkflowCommitWorkBatchService retrying commitWorkBatchCallback (retry attempt " + retryCounter.ToString(System.Globalization.CultureInfo.InvariantCulture) + ")");
continue;
}
else
throw;
}
}
}
}
}
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