protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
return(new TextOperationResult
{
Success = String.Compare(TextSocketHelper.ReadResponse(socket), "STORED", StringComparison.Ordinal) == 0
});
}
/// <summary>
/// Reads the response of the server.
/// </summary>
/// <returns>The data sent by the memcached server.</returns>
/// <exception cref="T:System.InvalidOperationException">The server did not sent a response or an empty line was returned.</exception>
/// <exception cref="T:NS.Component.Memcache.Caching.Memcached.MemcachedException">The server did not specified any reason just returned the string ERROR. - or - The server returned a SERVER_ERROR, in this case the Message of the exception is the message returned by the server.</exception>
/// <exception cref="T:NS.Component.Memcache.Caching.Memcached.MemcachedClientException">The server did not recognize the request sent by the client. The Message of the exception is the message returned by the server.</exception>
public static string ReadResponse(PooledSocket socket)
{
string response = TextSocketHelper.ReadLine(socket);
if (log.IsDebugEnabled)
{
log.Debug("Received response: " + response);
}
if (String.IsNullOrEmpty(response))
{
throw new MemcachedClientException("Empty response received.");
}
if (String.Compare(response, GenericErrorResponse, StringComparison.Ordinal) == 0)
{
throw new NotSupportedException("Operation is not supported by the server or the request was malformed. If the latter please report the bug to the developers.");
}
if (response.Length >= ErrorResponseLength)
{
if (String.Compare(response, 0, ClientErrorResponse, 0, ErrorResponseLength, StringComparison.Ordinal) == 0)
{
throw new MemcachedClientException(response.Remove(0, ErrorResponseLength));
}
else if (String.Compare(response, 0, ServerErrorResponse, 0, ErrorResponseLength, StringComparison.Ordinal) == 0)
{
throw new MemcachedException(response.Remove(0, ErrorResponseLength));
}
}
return(response);
}
protected internal override IList <ArraySegment <byte> > GetBuffer()
{
var command = String.IsNullOrEmpty(this.type)
? "stats" + TextSocketHelper.CommandTerminator
: "stats " + this.type + TextSocketHelper.CommandTerminator;
return(TextSocketHelper.GetCommandBuffer(command));
}
protected internal override IList <ArraySegment <byte> > GetBuffer()
{
// gets key1 key2 key3 ... keyN\r\n
var command = "gets " + String.Join(" ", Keys.ToArray()) + TextSocketHelper.CommandTerminator;
return(TextSocketHelper.GetCommandBuffer(command));
}
public static void FinishCurrent(PooledSocket socket)
{
string response = TextSocketHelper.ReadResponse(socket);
if (String.Compare(response, "END", StringComparison.Ordinal) != 0)
{
throw new MemcachedClientException("No END was received.");
}
}
protected internal override IList <ArraySegment <byte> > GetBuffer()
{
var command = (this.mode == MutationMode.Increment ? "incr " : "decr ")
+ this.Key
+ " "
+ this.delta.ToString(CultureInfo.InvariantCulture)
+ TextSocketHelper.CommandTerminator;
return(TextSocketHelper.GetCommandBuffer(command));
}
public static GetResponse ReadItem(PooledSocket socket)
{
string description = TextSocketHelper.ReadResponse(socket);
if (String.Compare(description, "END", StringComparison.Ordinal) == 0)
{
return(null);
}
if (description.Length < 6 || String.Compare(description, 0, "VALUE ", 0, 6, StringComparison.Ordinal) != 0)
{
throw new MemcachedClientException("No VALUE response received.\r\n" + description);
}
ulong cas = 0;
string[] parts = description.Split(' ');
// response is:
// VALUE <key> <flags> <bytes> [<cas unique>]
// 0 1 2 3 4
//
// cas only exists in 1.2.4+
//
if (parts.Length == 5)
{
if (!UInt64.TryParse(parts[4], out cas))
{
throw new MemcachedClientException("Invalid CAS VALUE received.");
}
}
else if (parts.Length < 4)
{
throw new MemcachedClientException("Invalid VALUE response received: " + description);
}
ushort flags = UInt16.Parse(parts[2], CultureInfo.InvariantCulture);
int length = Int32.Parse(parts[3], CultureInfo.InvariantCulture);
byte[] allData = new byte[length];
byte[] eod = new byte[2];
socket.Read(allData, 0, length);
socket.Read(eod, 0, 2); // data is terminated by \r\n
GetResponse retval = new GetResponse(parts[1], flags, cas, allData);
if (log.IsDebugEnabled)
{
log.DebugFormat("Received value. Data type: {0}, size: {1}.", retval.Item.Flags, retval.Item.Data.Count);
}
return(retval);
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
string response = TextSocketHelper.ReadResponse(socket);
var result = new TextOperationResult();
//maybe we should throw an exception when the item is not found?
if (String.Compare(response, "NOT_FOUND", StringComparison.Ordinal) == 0)
{
return(result.Fail("Failed to read response. Item not found"));
}
result.Success =
UInt64.TryParse(response, NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite, CultureInfo.InvariantCulture, out this.result);
return(result);
}
protected internal override System.Collections.Generic.IList <ArraySegment <byte> > GetBuffer()
{
// todo adjust the size to fit a request using a fnv hashed key
var sb = new StringBuilder(128);
var buffers = new List <ArraySegment <byte> >(3);
switch (this.command)
{
case StoreCommand.Add: sb.Append("add "); break;
case StoreCommand.Replace: sb.Append("replace "); break;
case StoreCommand.Set: sb.Append("set "); break;
case StoreCommand.Append: sb.Append("append "); break;
case StoreCommand.Prepend: sb.Append("prepend "); break;
case StoreCommand.CheckAndSet: sb.Append("cas "); break;
default: throw new MemcachedClientException(command + " is not supported.");
}
sb.Append(this.Key);
sb.Append(" ");
sb.Append(this.value.Flags.ToString(CultureInfo.InvariantCulture));
sb.Append(" ");
sb.Append(this.expires.ToString(CultureInfo.InvariantCulture));
sb.Append(" ");
var data = this.value.Data;
sb.Append(Convert.ToString(data.Count, CultureInfo.InvariantCulture));
if (command == StoreCommand.CheckAndSet)
{
sb.Append(" ");
sb.Append(Convert.ToString(this.cas, CultureInfo.InvariantCulture));
}
sb.Append(TextSocketHelper.CommandTerminator);
TextSocketHelper.GetCommandBuffer(sb.ToString(), buffers);
buffers.Add(data);
buffers.Add(StoreOperationBase.DataTerminator);
return(buffers);
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
var serverData = new Dictionary <string, string>();
while (true)
{
string line = TextSocketHelper.ReadResponse(socket);
// stat values are terminated by END
if (String.Compare(line, "END", StringComparison.Ordinal) == 0)
{
break;
}
// expected response is STAT item_name item_value
if (line.Length < 6 || String.Compare(line, 0, "STAT ", 0, 5, StringComparison.Ordinal) != 0)
{
if (log.IsWarnEnabled)
{
log.Warn("Unknow response: " + line);
}
continue;
}
// get the key&value
string[] parts = line.Remove(0, 5).Split(' ');
if (parts.Length != 2)
{
if (log.IsWarnEnabled)
{
log.Warn("Unknow response: " + line);
}
continue;
}
// store the stat item
serverData[parts[0]] = parts[1];
}
this.result = serverData;
return(new TextOperationResult().Pass());
}
protected internal override System.Collections.Generic.IList <System.ArraySegment <byte> > GetBuffer()
{
var command = "gets " + this.Key + TextSocketHelper.CommandTerminator;
return(TextSocketHelper.GetCommandBuffer(command));
}
protected internal override IOperationResult ReadResponse(PooledSocket socket)
{
TextSocketHelper.ReadResponse(socket);
return(new TextOperationResult().Pass());
}
protected internal override IList <System.ArraySegment <byte> > GetBuffer()
{
return(TextSocketHelper.GetCommandBuffer("flush_all" + TextSocketHelper.CommandTerminator));
}
