internal override void Visit(InitiGetVersionListRequest req)
{
// The version list is empty
if (!this.dict.ContainsKey(req.RecordKey))
{
Dictionary <long, VersionEntry> newVersionList =
new Dictionary <long, VersionEntry>(SingletonPartitionedVersionTable.VERSION_CAPACITY);
// Adds a special entry whose key is TAIL_KEY when the list is initialized.
// The entry uses beginTimestamp as a pointer pointing to the newest verion in the list.
newVersionList.Add(
SingletonDictionaryVersionTable.TAIL_KEY, VersionEntry.InitEmptyVersionEntry());
this.dict.Add(req.RecordKey, newVersionList);
// The version list is newly created by this tx.
// No meaningful versions exist, except for the artificial entry as a tail pointer.
req.RemoteVerList = newVersionList;
req.Result = true;
req.Finished = true;
return;
}
else
{
req.RemoteVerList = null;
req.Result = false;
req.Finished = true;
}
}
internal override void Visit(InitiGetVersionListRequest req)
{
ConcurrentDictionary <long, VersionEntry> versionList = null;
if (!this.dict.TryGetValue(req.RecordKey, out versionList))
{
ConcurrentDictionary <long, VersionEntry> newVersionList = new ConcurrentDictionary <long, VersionEntry>(32);
// Adds a special entry whose key is -1 when the list is initialized.
// The entry uses beginTimestamp as a pointer pointing to the newest verion in the list.
VersionEntry entry = VersionEntry.InitEmptyVersionEntry();
ResetTailEntry(entry);
newVersionList.TryAdd(SingletonDictionaryVersionTable.TAIL_KEY, entry);
// if concurrentDict.TryAdd()
this.dict.Add(req.RecordKey, newVersionList);
// The version list is newly created by this tx.
// No meaningful versions exist, except for the artificial entry as a tail pointer.
req.RemoteVerList = newVersionList;
req.Result = true;
req.Finished = true;
return;
}
req.RemoteVerList = null;
req.Result = false;
req.Finished = true;
}
internal override void MockLoadData(int recordCount)
{
int pk = 0;
while (pk < this.VersionDb.PartitionCount)
{
Console.WriteLine("Loading Partition {0}", pk);
int partitions = this.VersionDb.PartitionCount;
for (int i = pk; i < recordCount; i += partitions)
{
object recordKey = i;
if (!this.dicts[pk].ContainsKey(recordKey))
{
this.dicts[pk].Add(recordKey, new Dictionary <long, VersionEntry>());
}
Dictionary <long, VersionEntry> versionList = this.dicts[pk][recordKey];
// `+ 1` is for conforming to the logic of `Insert` and
// `ReadAndInitialize` in 'TransactionExecution.cs'.
// It's the version key of the first Inserted version.
long firstMeaningfulVersion = VersionEntry.VERSION_KEY_START_INDEX + 1;
VersionEntry emptyEntry = new VersionEntry();
VersionEntry.InitEmptyVersionEntry(emptyEntry);
emptyEntry.BeginTimestamp = firstMeaningfulVersion;
emptyEntry.EndTimestamp = firstMeaningfulVersion;
versionList.Add(SingletonDictionaryVersionTable.TAIL_KEY, emptyEntry);
VersionEntry versionEntry = new VersionEntry();
VersionEntry.InitFirstVersionEntry(versionEntry.Record == null ? new String('a', 100) : versionEntry.Record, versionEntry);
versionList.Add(firstMeaningfulVersion, versionEntry);
}
pk++;
}
}
internal override void MockLoadData(int recordCount)
{
int pk = 0;
while (pk < this.VersionDb.PartitionCount)
{
Console.WriteLine("Loading Partition {0}", pk);
for (int i = pk; i < recordCount; i += this.VersionDb.PartitionCount)
{
object recordKey = i;
ConcurrentDictionary <long, VersionEntry> versionList = null;
if (!this.dict.TryGetValue(recordKey, out versionList))
{
versionList = new ConcurrentDictionary <long, VersionEntry>();
this.dict.Add(recordKey, versionList);
}
// `+ 1` is for conforming to the logic of `Insert` and
// `ReadAndInitialize` in `TransactionExecution`.
// It's the version key of the first Inserted version.
long firstMeaningfulVersion = VersionEntry.VERSION_KEY_START_INDEX + 1;
VersionEntry emptyEntry = new VersionEntry();
VersionEntry.InitEmptyVersionEntry(emptyEntry);
emptyEntry.BeginTimestamp = firstMeaningfulVersion;
emptyEntry.EndTimestamp = firstMeaningfulVersion;
versionList.TryAdd(TAIL_KEY, emptyEntry);
VersionEntry versionEntry = new VersionEntry();
VersionEntry.InitFirstVersionEntry(versionEntry.Record == null ? new String('a', 100) : versionEntry.Record, versionEntry);
versionList.TryAdd(firstMeaningfulVersion, versionEntry);
}
pk++;
}
}
internal override void Visit(InitiGetVersionListRequest req)
{
VersionEntry emptyEntry = VersionEntry.InitEmptyVersionEntry();
this.CQLExecute(string.Format(PartitionedCassandraVersionTable.CQL_UPLOAD_VERSION_ENTRY,
req.TableId,
req.RecordKey.ToString(),
emptyEntry.VersionKey,
emptyEntry.BeginTimestamp,
emptyEntry.EndTimestamp,
BytesSerializer.ToHexString(BytesSerializer.Serialize(emptyEntry.Record)),
emptyEntry.TxId,
emptyEntry.MaxCommitTs));
req.Result = true;
req.Finished = true;
}
