public void Lock_Reentrancy_DoesNotBlock()
{
using (var mutex = new GlobalMutex("test"))
{
mutex.Initialize();
using (mutex.Lock())
{
using (mutex.Lock()) {}
}
}
}
/// <summary>
/// API to query the SLDR for an LDML file and save it locally in the SLDR cache and specified directories
/// </summary>
/// <param name="destinationPath">Destination path to save the requested LDML file</param>
/// <param name="languageTag">Current IETF language tag</param>
/// <param name="topLevelElements">List of top level element names to request. SLDR will always publish identity, so it doesn't need to be requested.
/// If null, the entire LDML file will be requested.</param>
/// <param name="filename">Saved filename</param>
/// <returns>Enum status SldrStatus if file could be retrieved and the source</returns>
public static SldrStatus GetLdmlFile(string destinationPath, string languageTag, IEnumerable <string> topLevelElements, out string filename)
{
CheckInitialized();
if (String.IsNullOrEmpty(destinationPath))
{
throw new ArgumentException("destinationPath");
}
if (!Directory.Exists(destinationPath))
{
throw new DirectoryNotFoundException("destinationPath");
}
if (String.IsNullOrEmpty(languageTag) || (!IetfLanguageTag.IsValid(languageTag)))
{
throw new ArgumentException("ietfLanguageTag");
}
if (topLevelElements == null)
{
throw new ArgumentNullException("topLevelElements");
}
string sldrLanguageTag = IetfLanguageTag.Canonicalize(languageTag);
SldrLanguageTagInfo langTagInfo;
if (LanguageTags.TryGet(sldrLanguageTag, out langTagInfo))
{
sldrLanguageTag = langTagInfo.SldrLanguageTag;
}
string[] topLevelElementsArray = topLevelElements.ToArray();
using (_sldrCacheMutex.Lock())
{
var status = SldrStatus.NotFound;
CreateSldrCacheDirectory();
string sldrCacheFilePath;
bool redirected;
do
{
string revid, uid = "", tempString;
if (destinationPath == SldrCachePath)
{
filename = string.Format("{0}.{1}", sldrLanguageTag, LdmlExtension);
}
else
{
filename = string.Format("{0}.{1}", languageTag, LdmlExtension);
// Check if LDML file already exists in destination and read revid and uid
if (!ReadSilIdentity(Path.Combine(destinationPath, filename), out tempString, out uid))
{
uid = DefaultUserId;
}
}
// If languageTag contains fonipa, don't bother trying to access the SLDR
if (sldrLanguageTag.Contains(WellKnownSubtags.IpaVariant) || sldrLanguageTag.Contains(WellKnownSubtags.AudioScript))
{
return(SldrStatus.NotFound);
}
sldrCacheFilePath = Path.Combine(SldrCachePath, !string.IsNullOrEmpty(uid) && uid != DefaultUserId ? string.Format("{0}-{1}.{2}", sldrLanguageTag, uid, LdmlExtension)
: string.Format("{0}.{1}", sldrLanguageTag, LdmlExtension));
// Read revid from cache file
ReadSilIdentity(sldrCacheFilePath, out revid, out tempString);
// Concatenate parameters for url string
string requestedElements = string.Empty;
if (topLevelElementsArray.Length > 0)
{
requestedElements = string.Format("&inc[]={0}", string.Join("&inc[]=", topLevelElementsArray));
}
string requestedUserId = !string.IsNullOrEmpty(uid) ? string.Format("&uid={0}", uid) : string.Empty;
string requestedRevid = !string.IsNullOrEmpty(revid) ? string.Format("&revid={0}", revid) : string.Empty;
string url = string.Format("{0}{1}?ext={2}&flatten=1{3}{4}{5}",
SldrRepository, sldrLanguageTag, LdmlExtension,
requestedElements, requestedUserId, requestedRevid);
string tempFilePath = sldrCacheFilePath + "." + TmpExtension;
// Using WebRequest instead of WebClient so we have access to disable AllowAutoRedirect
var webRequest = (HttpWebRequest)WebRequest.Create(Uri.EscapeUriString(url));
webRequest.AllowAutoRedirect = false;
webRequest.UserAgent = UserAgent;
webRequest.Timeout = 10000;
try
{
if (_offlineMode)
{
throw new WebException("Test mode: SLDR offline so accessing cache", WebExceptionStatus.ConnectFailure);
}
// Check the response header to see if the requested LDML file got redirected
using (var webResponse = (HttpWebResponse)webRequest.GetResponse())
{
if (webResponse.StatusCode == HttpStatusCode.NotModified)
{
// Report status that file is the most current from SLDR
status = SldrStatus.FromSldr;
redirected = false;
}
else if (webResponse.StatusCode == HttpStatusCode.MovedPermanently)
{
// Extract ietfLanguageTag from the response header
var parsedresponse = HttpUtilityFromMono.ParseQueryString(webResponse.Headers["Location"]);
sldrLanguageTag = parsedresponse.Get("ws_id").Split('?')[0];
redirected = true;
}
else
{
// Download the LDML file to a temp file in case the transfer gets interrupted
using (Stream responseStream = webResponse.GetResponseStream())
using (var fs = new FileStream(tempFilePath, FileMode.OpenOrCreate, FileAccess.Write))
{
var buff = new byte[102400];
int c;
while ((c = responseStream.Read(buff, 0, buff.Length)) > 0)
{
fs.Write(buff, 0, c);
fs.Flush();
}
}
status = SldrStatus.FromSldr;
sldrCacheFilePath = MoveTmpToCache(tempFilePath, uid);
redirected = false;
}
}
}
catch (WebException we)
{
// Return from 404 error
var errorResponse = (HttpWebResponse)we.Response;
if ((we.Status == WebExceptionStatus.ProtocolError) && (errorResponse.StatusCode == HttpStatusCode.NotFound))
{
return(SldrStatus.NotFound);
}
string sldrCacheFilename;
// Download failed so check SLDR cache
if (!string.IsNullOrEmpty(uid) && (uid != DefaultUserId))
{
sldrCacheFilename = string.Format("{0}-{1}.{2}", sldrLanguageTag, uid, LdmlExtension);
}
else
{
sldrCacheFilename = string.Format("{0}.{1}", sldrLanguageTag, LdmlExtension);
}
sldrCacheFilePath = Path.Combine(SldrCachePath, sldrCacheFilename);
if (File.Exists(sldrCacheFilePath))
{
status = SldrStatus.FromCache;
}
else
{
return(SldrStatus.UnableToConnectToSldr);
}
redirected = false;
}
finally
{
if (File.Exists(tempFilePath))
{
File.Delete(tempFilePath);
}
}
} while (redirected);
if (destinationPath != SldrCachePath)
{
// Copy from Cache to destination (w/o uid in filename), overwriting whatever used to be there
File.Copy(sldrCacheFilePath, Path.Combine(destinationPath, filename), true);
}
return(status);
}
}
protected override void ShutdownInternal()
{
if (m_commitLogMutex != null && m_commitLogMetadata != null)
{
CompleteAllCommits();
using (m_commitLogMutex.Lock())
{
#if __MonoCS__
bool delete = false;
#endif
using (MemoryMappedViewStream stream = m_commitLogMetadata.CreateViewStream())
{
CommitLogMetadata metadata;
if (TryGetMetadata(stream, out metadata))
{
if (metadata.Master == m_peerID)
{
// commit any unseen foreign changes
List <ICmObjectSurrogate> foreignNewbies;
List <ICmObjectSurrogate> foreignDirtballs;
List <ICmObjectId> foreignGoners;
if (GetUnseenForeignChanges(metadata, out foreignNewbies, out foreignDirtballs, out foreignGoners))
{
var newObjects = new HashSet <ICmObjectOrSurrogate>(foreignNewbies);
var editedObjects = new HashSet <ICmObjectOrSurrogate>(foreignDirtballs);
var removedObjects = new HashSet <ICmObjectId>(foreignGoners);
IEnumerable <CustomFieldInfo> fields;
if (HaveAnythingToCommit(newObjects, editedObjects, removedObjects, out fields) && (StartupVersionNumber == ModelVersion))
{
base.WriteCommitWork(new CommitWork(newObjects, editedObjects, removedObjects, fields));
}
}
// XML file is now totally up-to-date
metadata.FileGeneration = metadata.CurrentGeneration;
}
RemovePeer(metadata, m_peerID);
#if __MonoCS__
delete = metadata.Peers.Count == 0;
#endif
SaveMetadata(stream, metadata);
}
}
base.UnlockProject();
m_commitLog.Dispose();
m_commitLog = null;
m_commitLogMetadata.Dispose();
m_commitLogMetadata = null;
#if __MonoCS__
if (delete)
{
File.Delete(Path.Combine(m_commitLogDir, CommitLogMetadataName));
File.Delete(Path.Combine(m_commitLogDir, CommitLogName));
m_commitLogMutex.Unlink();
}
#endif
}
}
if (m_commitLogMutex != null)
{
m_commitLogMutex.Dispose();
m_commitLogMutex = null;
}
if (CommitThread != null)
{
CommitThread.Stop();
CommitThread.Dispose();
CommitThread = null;
}
foreach (Process peerProcess in m_peerProcesses.Values)
{
peerProcess.Close();
}
m_peerProcesses.Clear();
}