private void Executer( )
{
int exitCode = 0;
TestHistory testHistory = null;
for (;;)
{
Thread.Sleep( ExecutionDelay );
// If there are items waiting on the queue, we will remove the first item and begin
// execution...
if ( ExecutionQueue.Count > 0 )
{
updateMutex.WaitOne( ); // Start waiting for the mutex...
// Pull out the queue entry...
QueueEntry entry = (QueueEntry)ExecutionQueue.Dequeue( );
// Set a flag on the RunItem to show that it is out of the queue and currently
// running.
foreach ( RunItem item in RunItems )
{
if ( item.TestID == entry.TestInformation.ID )
item.IsRunning = true;
}
updateMutex.ReleaseMutex( ); // Release the mutex when done...
// Add a new history entry to record that the test is now starting...
testHistory = new TestHistory( );
testHistory.TestID = entry.TestInformation.ID;
testHistory.Runtime = DateTime.Now;
testHistory.Status = "STARTED";
dbConnection.AddTestHistory( testHistory );
// Update the CURRENT state of the test...
UpdateTestState( entry.TestInformation.ID, "RUNNING" );
// Now, outside the main mutex, we perform our concurrent action for running the
// executable, but this time using a different mutex. This makes sure that
// each application never runs more than one at a time.
executionMutex.WaitOne( );
exitCode = ExecuteQueueEntry( entry );
executionMutex.ReleaseMutex( );
// We must grab the mutex again to mess with the RunItem structure...
updateMutex.WaitOne( );
// Since the position or location of the RunItem in memory cannot be guaranteed because we
// left the mutex for the run of the program, we must go back and find it again...
foreach ( RunItem item in RunItems )
{
if ( item.TestID == entry.TestInformation.ID )
{
// The application is no longer running, so update that state in the current
// memory structure...
item.IsRunning = false;
// Modify the existing runFrequency trackingItem definition to contain the current
// time as the start time...
RunFrequency runFrequency = new RunFrequency( item.Frequency );
runFrequency.StartDate = DateTime.Now;
// If this test is supposed to run a static number of times, we decrement the counter...
if ( !runFrequency.RunInfinite )
runFrequency.RunNumberOfTimes--;
// Update the item already in memory with the new changes...
item.Frequency = runFrequency.GetFrequencyString( );
// Now, update the SQL database with this information...
UpdateRunItemFrequency( item.TestID, runFrequency.GetFrequencyString( ) );
// Add a new history entry to record the results of the test...
testHistory = new TestHistory( );
testHistory.TestID = item.TestID;
testHistory.Runtime = runFrequency.StartDate;
if ( exitCode == 0 )
{
testHistory.Status = "SUCCESS";
SendEmail( item, true );
}
else
{
testHistory.Status = "FAILURE (" + exitCode.ToString( ) + ")";
SendEmail( item, false );
}
// Update the CURRENT state of the test... - SUCCESS or FAILURE (either determines that
// the test is no longer running - STOPPED).
UpdateTestState( item.TestID, testHistory.Status );
dbConnection.AddTestHistory( testHistory );
}
else
{
// We should NEVER get here...
eventLog.WriteEntry( "An item existed in the execution queue which didn't exist in the database!",
System.Diagnostics.EventLogEntryType.Error );
}
}
// Release the mutex so that further threads may modify the RunItem structures...
updateMutex.ReleaseMutex( );
}
}
}
