// <summary>
/// Initializes a server that has never synchronized before.
/// </summary>
/// <remarks>
/// Thread safety: this is NOT thread safe. Because it is NOT meant to run multi-threaded.
/// Callers MUST ensure thread-safety.
/// </remarks>
private SyncBootState InitializeColdBootState()
{
lock (_locko)
{
if (_cancellationToken.IsCancellationRequested)
{
return(SyncBootState.Unknown);
}
SyncBootState syncState = _syncBootStateAccessor.GetSyncBootState();
if (syncState == SyncBootState.ColdBoot)
{
// Get the last id in the db and store it.
// Note: Do it BEFORE initializing otherwise some instructions might get lost
// when doing it before. Some instructions might run twice but this is not an issue.
var maxId = CacheInstructionService.GetMaxInstructionId();
// if there is a max currently, or if we've never synced
if (maxId > 0 || _lastSyncedFileManager.LastSyncedId < 0)
{
_lastSyncedFileManager.SaveLastSyncedId(maxId);
}
}
return(syncState);
}
}
private SyncBootState BootInternal()
{
// weight:10, must release *before* the published snapshot service, because once released
// the service will *not* be able to properly handle our notifications anymore
const int weight = 10;
if (!(_runtime is RuntimeState runtime))
{
throw new NotSupportedException($"Unsupported IRuntimeState implementation {_runtime.GetType().FullName}, expecting {typeof(RuntimeState).FullName}.");
}
var registered = runtime.MainDom.Register(
() =>
{
lock (_locko)
{
_released = true; // no more syncs
}
// wait a max of 5 seconds and then return, so that we don't block
// the entire MainDom callbacks chain and prevent the AppDomain from
// properly releasing MainDom - a timeout here means that one refresher
// is taking too much time processing, however when it's done we will
// not update lastId and stop everything
var idle = _syncIdle.WaitOne(5000);
if (idle == false)
{
Logger.Warn <DatabaseServerMessenger>("The wait lock timed out, application is shutting down. The current instruction batch will be re-processed.");
}
},
weight);
SyncBootState bootState = SyncBootState.Unknown;
if (registered == false)
{
return(bootState);
}
ReadLastSynced(); // get _lastId
using (var scope = ScopeProvider.CreateScope())
{
EnsureInstructions(scope.Database); // reset _lastId if instructions are missing
bootState = Initialize(scope.Database); // boot
scope.Complete();
}
return(bootState);
}
/// <summary>
/// On first http request schedule an index rebuild for any empty indexes (or all if it's a cold boot)
/// </summary>
/// <param name="notification"></param>
public void Handle(UmbracoRequestBeginNotification notification)
{
if (_runtimeState.Level != RuntimeLevel.Run)
{
return;
}
LazyInitializer.EnsureInitialized(
ref _isReady,
ref _isReadSet,
ref _isReadyLock,
() =>
{
SyncBootState bootState = _syncBootStateAccessor.GetSyncBootState();
_backgroundIndexRebuilder.RebuildIndexes(
// if it's not a cold boot, only rebuild empty ones
bootState != SyncBootState.ColdBoot,
TimeSpan.FromMinutes(1));
return(true);
});
}
public TestSyncBootStateAccessor(SyncBootState syncBootState)
{
_syncBootState = syncBootState;
}
/// <summary>
/// Lazily populates the stores only when they are first requested
/// </summary>
internal void EnsureCaches() => LazyInitializer.EnsureInitialized(
ref _isReady,
ref _isReadSet,
ref _isReadyLock,
() =>
{
// lock this entire call, we only want a single thread to be accessing the stores at once and within
// the call below to mainDom.Register, a callback may occur on a threadpool thread to MainDomRelease
// at the same time as we are trying to write to the stores. MainDomRelease also locks on _storesLock so
// it will not be able to close the stores until we are done populating (if the store is empty)
lock (_storesLock)
{
if (!_options.IgnoreLocalDb)
{
_mainDom.Register(MainDomRegister, MainDomRelease);
// stores are created with a db so they can write to it, but they do not read from it,
// stores need to be populated, happens in OnResolutionFrozen which uses _localDbExists to
// figure out whether it can read the databases or it should populate them from sql
_logger.LogInformation("Creating the content store, localContentDbExists? {LocalContentDbExists}", _localContentDbExists);
_contentStore = new ContentStore(_publishedSnapshotAccessor, _variationContextAccessor, _loggerFactory.CreateLogger("ContentStore"), _loggerFactory, _publishedModelFactory, _localContentDb);
_logger.LogInformation("Creating the media store, localMediaDbExists? {LocalMediaDbExists}", _localMediaDbExists);
_mediaStore = new ContentStore(_publishedSnapshotAccessor, _variationContextAccessor, _loggerFactory.CreateLogger("ContentStore"), _loggerFactory, _publishedModelFactory, _localMediaDb);
}
else
{
_logger.LogInformation("Creating the content store (local db ignored)");
_contentStore = new ContentStore(_publishedSnapshotAccessor, _variationContextAccessor, _loggerFactory.CreateLogger("ContentStore"), _loggerFactory, _publishedModelFactory);
_logger.LogInformation("Creating the media store (local db ignored)");
_mediaStore = new ContentStore(_publishedSnapshotAccessor, _variationContextAccessor, _loggerFactory.CreateLogger("ContentStore"), _loggerFactory, _publishedModelFactory);
}
_domainStore = new SnapDictionary <int, Domain>();
var okContent = false;
var okMedia = false;
SyncBootState bootState = _syncBootStateAccessor.GetSyncBootState();
try
{
if (bootState != SyncBootState.ColdBoot && _localContentDbExists)
{
okContent = LockAndLoadContent(() => LoadContentFromLocalDbLocked(true));
if (!okContent)
{
_logger.LogWarning("Loading content from local db raised warnings, will reload from database.");
}
}
if (bootState != SyncBootState.ColdBoot && _localMediaDbExists)
{
okMedia = LockAndLoadMedia(() => LoadMediaFromLocalDbLocked(true));
if (!okMedia)
{
_logger.LogWarning("Loading media from local db raised warnings, will reload from database.");
}
}
if (!okContent)
{
LockAndLoadContent(() => LoadContentFromDatabaseLocked(true));
}
if (!okMedia)
{
LockAndLoadMedia(() => LoadMediaFromDatabaseLocked(true));
}
LockAndLoadDomains();
}
catch (Exception ex)
{
_logger.LogCritical(ex, "Panic, exception while loading cache data.");
throw;
}
return(true);
}
});
