public static IIronLeveldb Build(this IIronLeveldbStorge storge, IronLeveldbOptions options)
{
var manifestContent = storge.GetCurrentDescriptorContent();
// TODO base version
var b = new Version.Builder(storge, options, null);
using (var manifestStream = manifestContent.AsStream())
{
foreach (var stream in new RecoverLogRecordsStream(manifestStream))
{
var versionEdit = VersionEdit.DecodeFrom(stream);
b.With(versionEdit);
}
}
var current = b.Build();
return(new IronLeveldbStub(options, current, () =>
{
var es = new List <Exception>();
try
{
storge.Dispose();
}
catch (Exception e)
{
es.Add(e);
}
try
{
current.Dispose();
}
catch (Exception e)
{
es.Add(e);
}
if (es.Count > 1)
{
throw new AggregateException(es);
}
if (es.Count == 1)
{
throw es.First();
}
}));
}
public ActionResult Edit(int id)
{
var svc = new VersionService();
var detail = svc.GetVersionById(id);
var model =
new VersionEdit
{
Id = detail.Id,
Name = detail.Name,
Description = detail.Description,
ReleaseYear = detail.ReleaseYear
};
return(View(model));
}
public bool UpdateVersion(VersionEdit model)
{
using (var ctx = new ApplicationDbContext())
{
var entity =
ctx
.Versions
.Single(e => e.Id == model.Id);
entity.Name = model.Name;
entity.Description = model.Description;
entity.ReleaseYear = model.ReleaseYear;
return(ctx.SaveChanges() == 1);
}
}
public Compaction(StorageState storageContext, int level, Version inputVersion = null)
{
this.storageContext = storageContext;
Level = level;
MaxOutputFileSize = CalculateMaxOutputFileSize(level);
this.inputVersion = inputVersion;
Edit = new VersionEdit();
Inputs = new[]
{
new List<FileMetadata>(),
new List<FileMetadata>()
};
Grandparents = new List<FileMetadata>();
grandparentIndex = 0;
seenKey = false;
overlappedBytes = 0;
levelPointers = new int[Config.NumberOfLevels];
for (int lvl = 0; lvl < Config.NumberOfLevels; lvl++)
{
levelPointers[lvl] = 0;
}
}
public ActionResult Edit(int id, VersionEdit model)
{
if (!ModelState.IsValid)
{
return(View(model));
}
if (model.Id != id)
{
ModelState.AddModelError("", "Id Mismatch");
return(View(model));
}
var svc = new VersionService();
if (svc.UpdateVersion(model))
{
TempData["SaveResult"] = "Your version was updated.";
return(RedirectToAction("Index"));
}
ModelState.AddModelError("", "Your version could not be updated.");
return(View(model));
}
/// <summary>
/// Add all inputs to this compaction as delete operations to *edit.
/// </summary>
/// <param name="edit"></param>
public void AddInputDeletions(VersionEdit edit)
{
for (var which = 0; which < 2; which++)
{
for (var i = 0; i < Inputs[which].Count; i++)
{
edit.DeleteFile(Level + which, Inputs[which][i].FileNumber);
}
}
}
public void WriteLevel0Table(MemTable memTable, Version currentVersion, VersionEdit edit)
{
var stopwatch = Stopwatch.StartNew();
var fileNumber = state.VersionSet.NewFileNumber();
pendingOutputs.Add(fileNumber);
var fileMetadata = state.BuildTable(memTable, fileNumber);
pendingOutputs.Remove(fileNumber);
// Note that if file_size is zero, the file has been deleted and
// should not be added to the manifest.
int level = 0;
if (fileMetadata.FileSize > 0)
{
var minUserKey = fileMetadata.SmallestKey.UserKey;
var maxUserKey = fileMetadata.LargestKey.UserKey;
if (currentVersion != null)
{
level = currentVersion.PickLevelForMemTableOutput(minUserKey, maxUserKey);
}
edit.AddFile(level, fileMetadata);
}
state.CompactionStats[level].Add(new CompactionStats
{
Milliseconds = stopwatch.ElapsedMilliseconds,
BytesRead = 0,
BytesWritten = fileMetadata.FileSize
});
}
/// <summary>
/// Compact the in-memory write buffer to disk. Switches to a new
/// log-file/memtable and writes a new descriptor if successful.
/// </summary>
/// <param name="locker"></param>
private async Task CompactMemTableAsync(AsyncLock.LockScope locker)
{
MemTable immutableMemTable;
Version currentVersion;
using (await locker.LockAsync())
{
if (state.ImmutableMemTable == null)
throw new InvalidOperationException("ImmutableMemTable cannot be null.");
immutableMemTable = state.ImmutableMemTable;
currentVersion = state.VersionSet.Current;
}
state.CancellationToken.ThrowIfCancellationRequested();
var edit = new VersionEdit();
WriteLevel0Table(immutableMemTable, currentVersion, edit);
// Replace immutable memtable with the generated Table
edit.SetPrevLogNumber(0);
edit.SetLogNumber(state.LogFileNumber);
await state.LogAndApplyAsync(edit, locker).ConfigureAwait(false);
state.ImmutableMemTable = null;
DeleteObsoleteFiles();
}
