101 lines
3.8 KiB
C#
101 lines
3.8 KiB
C#
//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.Activities.DurableInstancing
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{
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using System.Data;
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using System.Data.SqlClient;
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using System.Globalization;
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using System.Runtime.DurableInstancing;
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using System.Transactions;
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using System.Xml.Linq;
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using System.Runtime;
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sealed class DetectRunnableInstancesAsyncResult : SqlWorkflowInstanceStoreAsyncResult
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{
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static readonly string commandText = string.Format(CultureInfo.InvariantCulture, "{0}.[DetectRunnableInstances]", SqlWorkflowInstanceStoreConstants.DefaultSchema);
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public DetectRunnableInstancesAsyncResult
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(
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InstancePersistenceContext context,
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InstancePersistenceCommand command,
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SqlWorkflowInstanceStore store,
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SqlWorkflowInstanceStoreLock storeLock,
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Transaction currentTransaction,
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TimeSpan timeout,
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AsyncCallback callback,
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object state
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) :
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base(context, command, store, storeLock, currentTransaction, timeout, callback, state)
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{
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}
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protected override string ConnectionString
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{
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get
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{
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SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(base.Store.CachedConnectionString);
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builder.ApplicationName = SqlWorkflowInstanceStore.CommonConnectionPoolName;
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return builder.ToString();
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}
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}
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protected override void GenerateSqlCommand(SqlCommand sqlCommand)
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{
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sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@workflowHostType", SqlDbType = SqlDbType.UniqueIdentifier, Value = base.Store.WorkflowHostType });
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if (base.Store.DatabaseVersion >= StoreUtilities.Version45)
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{
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sqlCommand.Parameters.Add(new SqlParameter { ParameterName = "@surrogateLockOwnerId", SqlDbType = SqlDbType.BigInt, Value = base.StoreLock.SurrogateLockOwnerId });
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}
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}
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protected override string GetSqlCommandText()
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{
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return DetectRunnableInstancesAsyncResult.commandText;
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}
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protected override CommandType GetSqlCommandType()
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{
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return CommandType.StoredProcedure;
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}
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protected override Exception ProcessSqlResult(SqlDataReader reader)
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{
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Exception exception = StoreUtilities.GetNextResultSet(base.InstancePersistenceCommand.Name, reader);
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if (exception == null)
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{
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bool instancesExist = !reader.IsDBNull(1);
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TimeSpan? timeTillNextPoll = null;
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bool instancesReadyToRun = false;
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if (instancesExist)
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{
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DateTime expirationTime = reader.GetDateTime(1);
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DateTime utcNow = reader.GetDateTime(2);
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if (expirationTime <= utcNow)
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{
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instancesReadyToRun = true;
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}
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else
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{
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timeTillNextPoll = expirationTime.Subtract(utcNow);
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}
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}
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if (instancesReadyToRun)
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{
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base.Store.UpdateEventStatus(true, HasRunnableWorkflowEvent.Value);
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}
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else
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{
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base.Store.UpdateEventStatus(false, HasRunnableWorkflowEvent.Value);
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base.StoreLock.InstanceDetectionTask.ResetTimer(false, timeTillNextPoll);
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}
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}
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return exception;
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}
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}
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}
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