public static IndexingActivityHistory GetHistory()
{
IndexingActivityHistory result;
var list = new List <IndexingActivityHistoryItem>(_history.Length);
lock (_lock)
{
for (int i = _position; i < _history.Length; i++)
{
if (_history[i] != null)
{
list.Add(_history[i]);
}
}
for (int i = 0; i < _position; i++)
{
if (_history[i] != null)
{
list.Add(_history[i]);
}
}
result = new IndexingActivityHistory()
{
State = IndexingActivityQueue.GetCurrentState(),
Recent = list.ToArray()
};
}
return(result);
}
public static void ExecuteActivity(LuceneIndexingActivity activity, bool waitForComplete, bool distribute)
{
if (distribute)
{
activity.Distribute();
}
// If there are too many activities in the queue, we have to drop at least the inner
// data of the activity to prevent memory overflow. We still have to wait for the
// activity to finish, but the inner data can (and will) be loaded from the db when
// the time comes for this activity to be executed.
if (IndexingActivityQueue.IsOverloaded())
{
SnTrace.Index.Write("IAQ OVERLOAD drop activity FromPopulator A:" + activity.Id);
activity.IndexDocumentData = null;
}
// all activities must be executed through the activity queue's API
IndexingActivityQueue.ExecuteActivity(activity);
if (waitForComplete)
{
activity.WaitForComplete();
}
}
// for testing purposes we need a parameterless method because ElapsedEventArgs has only internal constructor
private static void Timer_Elapsed()
{
if (RepositoryInstance.ContentQueryIsAllowed)
{
var timerEnabled = _timer.Enabled;
_timer.Enabled = false;
try
{
IndexingActivityQueue.HealthCheck();
}
catch (Exception ex) // logged
{
SnLog.WriteException(ex);
}
finally
{
_timer.Enabled = timerEnabled;
}
}
}
internal static void HealthCheck()
{
if (IsWorking())
{
SnTrace.Index.Write("IAQ: Health check triggered but ignored.");
return;
}
SnTrace.Index.Write("IAQ: Health check triggered.");
var state = TerminationHistory.GetCurrentState();
var gapsLength = state.Gaps.Length;
if (gapsLength > 0)
{
SnTrace.IndexQueue.Write("IAQ: Health checker is processing {0} gap{1}.", gapsLength, gapsLength > 1 ? "s" : "");
foreach (LuceneIndexingActivity activity in new IndexingActivityLoader(state.Gaps, false))
{
WaitIfOverloaded();
IndexingActivityQueue.ExecuteActivity(activity);
}
}
var lastId = TerminationHistory.GetLastTerminatedId();
var lastDbId = LuceneManager.GetLastStoredIndexingActivityId();
var newerCount = lastDbId - lastId;
if (lastId < lastDbId)
{
SnTrace.IndexQueue.Write("IAQ: Health checker is processing activities from {0} to {1}", (lastId + 1), lastDbId);
foreach (LuceneIndexingActivity activity in new IndexingActivityLoader(lastId + 1, lastDbId, false))
{
WaitIfOverloaded();
IndexingActivityQueue.ExecuteActivity(activity);
}
}
}
public static IndexingActivityHistory Reset()
{
IndexingActivityHistory result;
lock (_lock)
{
for (int i = 0; i < _history.Length; i++)
{
_history[i] = null;
}
_position = 0;
_unfinished = 0;
result = new IndexingActivityHistory()
{
State = IndexingActivityQueue.GetCurrentState(),
Recent = new IndexingActivityHistoryItem[0]
};
}
return(result);
}
private static void Startup(System.IO.TextWriter consoleOut)
{
// we positively start the message cluster
int dummy = SenseNet.ContentRepository.DistributedApplication.Cache.Count;
var dummy2 = SenseNet.ContentRepository.DistributedApplication.ClusterChannel;
if (SenseNet.ContentRepository.RepositoryInstance.RestoreIndexOnStartup())
{
BackupTools.RestoreIndex(false, consoleOut);
}
CreateWriterAndReader();
IndexingActivityQueue.Startup(consoleOut);
Warmup();
var commitStart = new ThreadStart(CommitWorker);
var t = new Thread(commitStart);
t.Start();
SnTrace.Index.Write("LM: 'CommitWorker' thread started. ManagedThreadId: {0}", t.ManagedThreadId);
}
private static void WaitIfOverloaded(bool startProcessing = false)
{
// We prevent memory overflow by limiting the number of activities that we
// keep in memory. This method waits for the queue to be able to process
// new activities.
var logCount = 1;
while (IndexingActivityQueue.IsOverloaded())
{
// In case of startup, we have to start processing activities that are
// already in the queue so that new ones can be added later.
if (startProcessing)
{
DependencyManager.ActivityEnqueued();
}
if (logCount++ % 10 == 1)
{
SnTrace.Index.Write("IAQ OVERLOAD waiting {0} milliseconds.", IndexingOverloadWaitingTime * 10);
}
Thread.Sleep(IndexingOverloadWaitingTime);
}
}
private static void ShutDown(bool log)
{
if (!_running)
{
return;
}
if (Paused)
{
throw GetPausedException();
}
using (var op = SnTrace.Index.StartOperation("LUCENEMANAGER SHUTDOWN"))
{
if (_writer != null)
{
_stopCommitWorker = true;
lock (_commitLock)
Commit(false);
using (var op2 = SnTrace.Index.StartOperation("LM.CloseReaders"))
{
using (var wrFrame = IndexWriterFrame.Get(true)) // // ShutDown
{
if (_reader != null)
{
_reader.Close();
}
if (_writer != null)
{
_writer.Close();
}
_running = false;
}
op2.Successful = true;
}
op.Successful = true;
}
}
if (log)
{
SnLog.WriteInformation("LuceneManager has stopped. Max task id and exceptions: " + IndexingActivityQueue.GetCurrentCompletionState());
}
}
internal static CompletionState GetCurrent()
{
return(IndexingActivityQueue.GetCurrentCompletionState());
}
