private void GetCompareExchangeValuesByKey(TransactionOperationContext context, Microsoft.Extensions.Primitives.StringValues keys)
{
var sw = Stopwatch.StartNew();
var items = new List <(string Key, long Index, BlittableJsonReaderObject Value)>(keys.Count);
foreach (var key in keys)
{
var item = ServerStore.Cluster.GetCompareExchangeValue(context, CompareExchangeCommandBase.GetActualKey(Database.Name, key));
if (item.Value == null && keys.Count == 1)
{
HttpContext.Response.StatusCode = (int)HttpStatusCode.NotFound;
return;
}
items.Add((key, item.Index, item.Value));
}
var numberOfResults = 0;
long totalDocumentsSizeInBytes = 0;
using (var writer = new BlittableJsonTextWriter(context, ResponseBodyStream()))
{
writer.WriteStartObject();
writer.WriteArray(context, "Results", items,
(textWriter, operationContext, item) =>
{
numberOfResults++;
totalDocumentsSizeInBytes += item.Value?.Size ?? 0;
operationContext.Write(textWriter, new DynamicJsonValue
{
["Key"] = item.Key,
["Value"] = item.Value,
["Index"] = item.Index
});
});
writer.WriteEndObject();
}
AddPagingPerformanceHint(PagingOperationType.CompareExchange, nameof(GetCompareExchangeValuesByKey), HttpContext.Request.QueryString.Value,
numberOfResults, keys.Count, sw.ElapsedMilliseconds, totalDocumentsSizeInBytes);
}
private void GetCompareExchangeValues(TransactionOperationContext context)
{
var sw = Stopwatch.StartNew();
var start = GetStart();
var pageSize = GetPageSize();
var startsWithKey = GetStringQueryString("startsWith", false);
var items = ServerStore.Cluster.GetCompareExchangeValuesStartsWith(context, Database.Name, CompareExchangeCommandBase.GetActualKey(Database.Name, startsWithKey), start, pageSize);
var numberOfResults = 0;
using (var writer = new BlittableJsonTextWriter(context, ResponseBodyStream()))
{
writer.WriteStartObject();
writer.WriteArray(context, "Results", items,
(textWriter, operationContext, item) =>
{
numberOfResults++;
operationContext.Write(textWriter, new DynamicJsonValue
{
[nameof(CompareExchangeListItem.Key)] = item.Key,
[nameof(CompareExchangeListItem.Value)] = item.Value,
[nameof(CompareExchangeListItem.Index)] = item.Index
});
});
writer.WriteEndObject();
}
AddPagingPerformanceHint(PagingOperationType.CompareExchange, nameof(ClusterStateMachine.GetCompareExchangeValuesStartsWith),
HttpContext.Request.QueryString.Value, numberOfResults, pageSize, sw.ElapsedMilliseconds);
}
public IEnumerable <(string key, long index, BlittableJsonReaderObject value)> GetCompareExchangeValues()
{
Debug.Assert(_serverContext != null);
return(_database.ServerStore.Cluster.GetCompareExchangeValuesStartsWith(_serverContext, _database.Name, CompareExchangeCommandBase.GetActualKey(_database.Name, null), 0, int.MaxValue));
}
public bool Update(UpdateStep step)
{
var oldCompareExchangeSchema = new TableSchema().
DefineKey(new TableSchema.SchemaIndexDef
{
StartIndex = (int)ClusterStateMachine.CompareExchangeTable.Key,
Count = 1
});
var newCompareExchangeSchema = new TableSchema()
.DefineKey(new TableSchema.SchemaIndexDef
{
StartIndex = (int)ClusterStateMachine.CompareExchangeTable.Key,
Count = 1
}).DefineIndex(new TableSchema.SchemaIndexDef
{
StartIndex = (int)ClusterStateMachine.CompareExchangeTable.PrefixIndex,
Count = 1,
Name = ClusterStateMachine.CompareExchangeIndex
});
const string oldTableName = "CmpXchg";
using (Slice.From(step.WriteTx.Allocator, oldTableName, out var oldCompareExchangeTable))
{
var oldTable = step.ReadTx.OpenTable(oldCompareExchangeSchema, oldCompareExchangeTable);
if (oldTable == null)
{
return(true);
}
var newTableName = ClusterStateMachine.CompareExchange.ToString();
foreach (var db in SchemaUpgradeExtensions.GetDatabases(step))
{
// update CompareExchange
newCompareExchangeSchema.Create(step.WriteTx, newTableName, null);
var newTable = step.WriteTx.OpenTable(newCompareExchangeSchema, newTableName);
var compareExchangeOldKey = $"{db.ToLowerInvariant()}/";
using (Slice.From(step.ReadTx.Allocator, compareExchangeOldKey, out var keyPrefix))
{
foreach (var item in oldTable.SeekByPrimaryKeyPrefix(keyPrefix, Slices.Empty, 0))
{
var index = DocumentsStorage.TableValueToLong((int)ClusterStateMachine.CompareExchangeTable.Index, ref item.Value.Reader);
using (CompareExchangeCommandBase.GetPrefixIndexSlices(step.ReadTx.Allocator, db, index, out var buffer))
using (Slice.External(step.WriteTx.Allocator, buffer.Ptr, buffer.Length, out var prefixIndexSlice))
using (newTable.Allocate(out TableValueBuilder write))
using (var ctx = JsonOperationContext.ShortTermSingleUse())
{
using (var bjro = new BlittableJsonReaderObject(
item.Value.Reader.Read((int)ClusterStateMachine.CompareExchangeTable.Value, out var size1),
size1, ctx).Clone(ctx)
)
{
write.Add(item.Key);
write.Add(index);
write.Add(bjro.BasePointer, bjro.Size);
write.Add(prefixIndexSlice);
newTable.Set(write);
}
}
}
}
}
}
// delete the old table
step.WriteTx.DeleteTable(oldTableName);
// remove the remaining CompareExchange global index
if (step.WriteTx.LowLevelTransaction.RootObjects.Read(ClusterStateMachine.CompareExchangeIndex) != null)
{
step.WriteTx.DeleteTree(ClusterStateMachine.CompareExchangeIndex);
}
return(true);
}