/// <summary>
/// Get a single page from database based on newsest version of page (use only PageID)
/// </summary>
private IEnumerable <BsonDocument> DumpPages(uint pageID)
{
var collections = _header.GetCollections().ToDictionary(x => x.Value, x => x.Key);
// get any transaction from current thread ID
var transaction = _monitor.GetThreadTransaction();
var snapshot = transaction.CreateSnapshot(LockMode.Read, "$", false);
var page = pageID == 0 ? _header : snapshot.GetPage <BasePage>(pageID);
var doc = new BsonDocument
{
["pageID"] = (int)page.PageID,
["pageType"] = page.PageType.ToString(),
["nextPageID"] = (int)page.NextPageID,
["prevPageID"] = (int)page.PrevPageID,
["collection"] = collections.GetOrDefault(page.ColID, "-"),
["itemsCount"] = (int)page.ItemsCount,
["freeBytes"] = page.FreeBytes,
["usedBytes"] = (int)page.UsedBytes,
["fragmentedBytes"] = (int)page.FragmentedBytes,
["nextFreePosition"] = (int)page.NextFreePosition,
["highestIndex"] = (int)page.HighestIndex,
["buffer"] = page.Buffer.ToArray()
};
yield return(doc);
}
public override IEnumerable <BsonDocument> Input(BsonValue options)
{
var pageID = GetOption(options, "pageID");
// get any transaction from current thread ID
var transaction = _monitor.GetThreadTransaction();
var snapshot = transaction.CreateSnapshot(LockMode.Read, "$", false);
_collections = _header.GetCollections().ToDictionary(x => x.Value, x => x.Key);
try
{
var result = pageID != null?
this.GetList((uint)pageID.AsInt32, null, transaction, snapshot) :
this.GetAllList(transaction, snapshot);
foreach (var page in result)
{
yield return(page);
}
}
finally
{
transaction.Commit();
}
}
private IEnumerable <BsonDocument> DumpPages(uint?pageID)
{
var collections = _header.GetCollections().ToDictionary(x => x.Value, x => x.Key);
// get any transaction from current thread ID
var transaction = _monitor.GetThreadTransaction();
var snapshot = transaction.CreateSnapshot(LockMode.Read, "$", false);
var start = pageID.HasValue ? pageID.Value : 0;
var end = pageID.HasValue ? pageID.Value : _header.LastPageID;
for (uint i = start; i <= Math.Min(end, _header.LastPageID); i++)
{
var page = snapshot.GetPage <BasePage>(i, out var origin, out var position, out var walVersion);
var doc = new BsonDocument
{
["pageID"] = (int)page.PageID,
["pageType"] = page.PageType.ToString(),
["_position"] = position,
["_origin"] = origin.ToString(),
["_version"] = walVersion,
["nextPageID"] = (int)page.NextPageID,
["prevPageID"] = (int)page.PrevPageID,
["collection"] = collections.GetOrDefault(page.ColID, "-"),
["itemsCount"] = (int)page.ItemsCount,
["freeBytes"] = page.FreeBytes,
["usedBytes"] = (int)page.UsedBytes,
["fragmentedBytes"] = (int)page.FragmentedBytes,
["nextFreePosition"] = (int)page.NextFreePosition,
["highestIndex"] = (int)page.HighestIndex
};
if (pageID.HasValue)
{
doc["buffer"] = page.Buffer.ToArray();
}
yield return(doc);
transaction.Safepoint();
}
}
private IEnumerable <BsonDocument> DumpPages(uint?pageID)
{
var collections = _header.GetCollections().ToDictionary(x => x.Value, x => x.Key);
// get any transaction from current thread ID
var transaction = _monitor.GetThreadTransaction();
var snapshot = transaction.CreateSnapshot(LockMode.Read, "$", false);
var start = pageID.HasValue ? pageID.Value : 0;
var end = pageID.HasValue ? pageID.Value : _header.LastPageID;
for (uint i = start; i <= Math.Min(end, _header.LastPageID); i++)
{
var page = snapshot.GetPage <BasePage>(i, out var origin, out var position, out var walVersion);
var doc = new BsonDocument
{
["pageID"] = (int)page.PageID,
["pageType"] = page.PageType.ToString(),
["_position"] = position,
["_origin"] = origin.ToString(),
["_version"] = walVersion,
["prevPageID"] = (int)page.PrevPageID,
["nextPageID"] = (int)page.NextPageID,
["slot"] = (int)page.PageListSlot,
["collection"] = collections.GetOrDefault(page.ColID, "-"),
["itemsCount"] = (int)page.ItemsCount,
["freeBytes"] = page.FreeBytes,
["usedBytes"] = (int)page.UsedBytes,
["fragmentedBytes"] = (int)page.FragmentedBytes,
["nextFreePosition"] = (int)page.NextFreePosition,
["highestIndex"] = (int)page.HighestIndex
};
if (page.PageType == PageType.Collection)
{
var collectionPage = new CollectionPage(page.Buffer);
doc["dataPageList"] = new BsonArray(collectionPage.FreeDataPageList.Select(x => new BsonValue((int)x)));
doc["indexes"] = new BsonArray(collectionPage.GetCollectionIndexes().Select(x => new BsonDocument
{
["slot"] = (int)x.Slot,
["empty"] = x.IsEmpty,
["indexType"] = (int)x.IndexType,
["name"] = x.Name,
["expression"] = x.Expression,
["unique"] = x.Unique,
["head"] = x.Head.ToBsonValue(),
["tail"] = x.Tail.ToBsonValue(),
["maxLevel"] = (int)x.MaxLevel,
["freeIndexPageList"] = (int)x.FreeIndexPageList,
}));
}
if (pageID.HasValue)
{
doc["buffer"] = page.Buffer.ToArray();
}
yield return(doc);
transaction.Safepoint();
}
}
