public void AsyncLock_ConcurrentLockFollowedByRelease()
{
ManualResetEvent done = new ManualResetEvent(false);
const int MaxCount = 100;
int count = 0;
Parallel.For(0, MaxCount, async cnt =>
{
await _lockFile.LockAsync();
// We are now within the lock
await Task.Delay(5);
count = count + 1;
// Releasing lock
_lockFile.Release();
if (count == MaxCount)
{
done.Set();
}
});
done.WaitOne();
Assert.Equal(MaxCount, count);
}
/**
* Uninstall a package asynchronously.
*/
public async Task RemovePackageAsync(string userId, string projectName, string packageName)
{
var pwd = $"{GetBaseDir(userId, projectName)}";
if (!Directory.Exists(pwd))
{
throw new EndUserException("The package has already been removed.");
}
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
try
{
Process proc = StartProcess($"\"{_yarnPath}\" remove {packageName}", pwd);
await WaitForExitAsync(proc);
await TransformFilesAsync(pwd);
string output = await proc.StandardOutput.ReadToEndAsync();
}
catch (Exception e)
{
throw new EndUserException("Internal error occured durning the uninstall of \"{packageName}\".", e);
}
}
}
public void AsyncLock_ThrowsIfNotInitialized()
{
string lockFilePath = Path.Combine(PathHelper.TestLockPath, "uninitialized.lock");
LockFile uninitialized = new LockFile(lockFilePath, NullTracerFactory.Instance);
Assert.Throws <InvalidOperationException>(() => uninitialized.LockAsync());
}
async Task <UserFile> IUserFileManager.WriteAsync(string userId, string projectName, string filePath, Stream data, string contentType)
{
// Get the base files directory.
string baseDir = GetBaseDir(userId, projectName);
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
List <UserFile> fileMetaList = null;
try
{
fileMetaList = await GetUserFilesAsync(userId, projectName);
}
catch (Exception e)
{
await AsyncIO.WriteAllTextAsync($"{baseDir}\\filemeta.json", "[]", Encoding.UTF8);
fileMetaList = new List <UserFile>();
}
if (fileMetaList.TryFind(x => x.VirtualPath == filePath, out var _))
{
return(await OverwriteFileAsync(baseDir, fileMetaList, filePath, data, contentType));
}
else
{
return(await WriteNewFileAsync(baseDir, fileMetaList, filePath, data, contentType));
}
}
}
async Task IUserFileManager.RenameAsync(string userId, string projectName, string oldFilePath, string newFilePath)
{
// Get the base files directory.
string baseDir = GetBaseDir(userId, projectName);
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
string fileMetaJson = null;
try
{
// Read the metadata file.
fileMetaJson = await AsyncIO.ReadAllTextAsync($"{baseDir}\\filemeta.json", Encoding.UTF8);
}
catch (FileNotFoundException e)
{
ThrowNotFound(projectName, oldFilePath);
}
// Get the file meta dict.
List <UserFile> fileMetaList = JsonConvert.DeserializeObject <List <UserFile> >(fileMetaJson);
if (fileMetaList.TryFind(x => x.VirtualPath == oldFilePath, out var fileMeta))
{
// Update the value in the list.
fileMetaList.Remove(fileMeta);
fileMetaList.Add(fileMeta.WithVirtualPath(newFilePath));
}
// Write the new file meta back to the file.
await AsyncIO.WriteAllTextAsync($"{baseDir}\\filemeta.json", JsonConvert.SerializeObject(fileMetaList), Encoding.UTF8);
}
}
/**
* Initializes the project if it has not already been initialized.
*/
private async Task TryInitProjectAsync(string pwd, string userId, string projectName)
{
if (!Directory.Exists(pwd))
{
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
await TryInstallToolsAsync();
Directory.CreateDirectory(pwd);
await AsyncIO.WriteAllTextAsync(pwd + "\\package.json", "{\"name\":\"creo-web-" + userId + "-" + projectName + "\",\"version\":\"1.0.0\",\"dependencies\":{}}", Encoding.UTF8);
}
}
}
async Task <IReadOnlyList <UserFile> > IUserFileManager.GetFilesAsync(string userId, string projectName)
{
// Get the base files directory.
string baseDir = GetBaseDir(userId, projectName);
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
try
{
return(await GetUserFilesAsync(userId, projectName));
}
catch (FileNotFoundException e)
{
return(new List <UserFile>());
}
}
}
async Task IUserFileManager.DeleteAsync(string userId, string projectName, string filePath)
{
// Get the base files directory.
string baseDir = GetBaseDir(userId, projectName);
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
var fileMetaList = await GetUserFilesAsync(userId, projectName);
if (fileMetaList.TryFind(x => x.VirtualPath == filePath, out var fileMeta))
{
File.Delete($"{baseDir}\\{fileMeta.LocalPath}");
// Remove from the list.
fileMetaList.Remove(fileMeta);
}
// Write the new file meta back to the file.
await AsyncIO.WriteAllTextAsync($"{baseDir}\\filemeta.json", JsonConvert.SerializeObject(fileMetaList), Encoding.UTF8);
}
}
/**
* Install a package asynchronously.
*/
public async Task AddPackageAsync(string userId, string projectName, string packageName)
{
var pwd = $"{GetBaseDir(userId, projectName)}";
await TryInitProjectAsync(pwd, userId, projectName);
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
try
{
Process proc = StartProcess($"{_yarnPath} add {packageName} --exact", pwd);
await WaitForExitAsync(proc);
await TransformFilesAsync(pwd);
string output = await proc.StandardOutput.ReadToEndAsync();
}
catch (Exception e)
{
throw new EndUserException("Internal error occured durning the install of \"{packageName}\".", e);
}
}
}
async Task <UserFileStream> IUserFileManager.ReadAsync(string userId, string projectName, string filePath)
{
// Get the base files directory.
string baseDir = GetBaseDir(userId, projectName);
using (await LockFile.LockAsync(GetLockFile(userId, projectName)))
{
var fileMetaList = await GetUserFilesAsync(userId, projectName);
if (fileMetaList.TryFind(x => x.VirtualPath == filePath, out var fileMeta))
{
return(new UserFileStream
(
stream: File.OpenRead($"{baseDir}\\{fileMeta.LocalPath}"),
metaData: fileMeta
));
}
else
{
ThrowNotFound(projectName, filePath);
throw null;
}
}
}