public Versioned Get(byte[] key, Versioned defaultValue)
{
for (int attempts = 0; attempts < METADATA_REFRESH_ATTEMPTS; attempts++)
{
try
{
Versioned curValue = null;
IList<Versioned> items = _Store.get(key);
if (items.Count == 0)
{
if (null == defaultValue)
return null;
curValue = defaultValue;
}
else if (items.Count == 1)
curValue = items[0];
else
throw new InconsistentDataException("Unresolved versions returned from get(" + key + ")");
return curValue;
}
catch (InvalidMetadataException ex)
{
if (log.IsErrorEnabled) log.Error("Exception thrown", ex);
reinit();
}
}
throw new InvalidMetadataException("Exceeded maximum metadata refresh attempts");
}
public void put(byte[] key, Versioned value)
{
try
{
using (Connection conn = Pool.Checkout(this.Host, this.Port, request.getNegotiationString()))
{
try
{
request.writePutRequest(conn.Stream,
this.Name,
key,
value.value,
(VectorClock)value.version,
this.ShouldReroute);
conn.Stream.Flush();
request.readPutResponse(conn.Stream);
}
catch
{
conn.Errored = true;
throw;
}
}
}
catch (UnreachableStoreException ex)
{
if (log.IsErrorEnabled) log.Error("Failure to get " + Host, ex);
throw new UnreachableStoreException("Failure to get " + Host, ex);
}
}
public void UpdateMetadata(byte[] key, Versioned versioned)
{
throw new NotImplementedException();
}
public void Put(byte[] key, byte[] value)
{
Versioned vv = Get(key);
if (null == vv)
{
try
{
vv = new Versioned() { value = value, version = new VectorClock() };
}
catch (InvalidMetadataException ex)
{
if (log.IsErrorEnabled) log.Error("Exception thrown", ex);
}
}
else
{
vv.value = value;
}
Put(key, vv);
}
public bool DeleteKey(byte[] key, Versioned version)
{
for (int attempts = 0; attempts < METADATA_REFRESH_ATTEMPTS; attempts++)
{
try
{
return _Store.deleteKey(key, version);
}
catch (InvalidMetadataException)
{
reinit();
}
}
throw new InvalidMetadataException("Exceeded maximum metadata refresh attempts");
}
public void Put(byte[] key, Versioned value)
{
for (int attempts = 0; attempts < METADATA_REFRESH_ATTEMPTS; attempts++)
{
try
{
_Store.put(key, value);
return;
}
catch (InvalidMetadataException ex)
{
if (log.IsErrorEnabled) log.Error("Exception thrown while calling put on store " + _Store.Name, ex);
reinit();
}
}
throw new InvalidMetadataException("Exceeded maximum metadata refresh attempts");
}
public bool PutifNotObsolete(byte[] key, Versioned value)
{
try
{
Put(key, value);
return true;
}
catch (ObsoleteVersionException)
{
//TODO:Revisit this. F**k throwing an exception if we don't need to.
return false;
}
}
public bool deleteKey(byte[] key, Versioned version)
{
bool status = false;
bool result = false;
IList<Node> prefList = _routingStrategy.routeRequest(key);
IList<Node> availableNodes = Node.GetAvailableNodes(prefList);
foreach (Node node in availableNodes)
{
status = doDeleteFromStore(key, version, node, _clusterMap[node.ID], out result);
if (status)
return result;
}
foreach (Node node in _cluster.NodeMap.Values)
{
status = doDeleteFromStore(key, version, node, _clusterMap[node.ID], out result);
if (status)
return result;
}
throw new InsufficientOperationalNodesException("Could not reach any node for get operation");
}
public void put(byte[] key, Versioned value)
{
bool status = false;
IList<Node> prefList = _routingStrategy.routeRequest(key);
IList<Node> availableNodes = Node.GetAvailableNodes(prefList);
foreach (Node node in availableNodes)
{
status = doPutFromStore(key, value, node, _clusterMap[node.ID]);
if (status)
return;
}
foreach (Node node in _cluster.NodeMap.Values)
{
status = doPutFromStore(key, value, node, _clusterMap[node.ID]);
if (status)
return;
}
throw new InsufficientOperationalNodesException("Could not reach any node for get operation");
}
static bool doDeleteFromStore(byte[] key,
Versioned version,
Node node,
Store store,
out bool result)
{
try
{
result = store.deleteKey(key, version);
node.SetAvailable(); //TODO: Check the cpp source for node and what's it's doing.
return true;
}
catch (UnreachableStoreException ex)
{
if (log.IsErrorEnabled) log.Error("Exception while calling store.get on " + node, ex);
node.SetDown();
}
catch (System.Net.Sockets.SocketException ex)
{
if (log.IsErrorEnabled) log.Error("Exception while calling store.get on " + node, ex);
node.SetDown();
}
catch (Exception ex)
{
if (log.IsErrorEnabled) log.Error("Exception while calling store.get on " + node, ex);
node.SetDown();
}
finally
{
node.Requests++;
}
result = false;
return false;
}
public bool deleteKey(byte[] key, Versioned version)
{
return _substore.deleteKey(key, version);
}
public void put(byte[] key, Versioned value)
{
_substore.put(key, value);
}
