public void Setup()
{
var connection = new RedisConnection("127.0.0.1", allowAdmin: true);
connection.Open();
connection.Server.FlushDb(0);
connection.Close(false);
}
internal async Task<long> PerformBitOperation(
RedisConnection connection)
{
var keys = new[] { LeftKey, RightKey };
if ("AND".Equals(Operation, StringComparison.Ordinal))
{
return await connection.Strings.BitwiseAnd(Db, Key, keys);
}
if ("OR".Equals(Operation, StringComparison.Ordinal))
{
return await connection.Strings.BitwiseOr(Db, Key, keys);
}
if ("XOR".Equals(Operation, StringComparison.Ordinal))
{
return await connection.Strings.BitwiseXOr(Db, Key, keys);
}
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentUICulture,
ErrorMessages.CompositeUserActivityReport_PerformBitOperation_Unsupported,
Operation));
}
private static async Task<RedisConnection> GetRedisConnection(string host)
{
RedisConnection c = new RedisConnection(host);
await c.Open();
return c;
}
public RedisBooksleevePersistence()
{
if (conn == null)
{
conn = GetRedisConnection("localhost").Result;
}
}
public RedisSignalBus(RedisConnection redisConnection)
{
_handlers = new ConcurrentDictionary<string, SafeSet<EventHandler<SignaledEventArgs>>>();
_redisConnection = redisConnection;
_subscriberConnection = _redisConnection.GetOpenSubscriberChannel();
_subscriberConnection.MessageReceived += OnRedisMessageReceived;
}
public void Test()
{
Debug.WriteLine("Iniciando");
using (var conn = new RedisConnection("localhost"))
{
conn.Open();
conn.Strings.Set(0, "nome", "joão");
}
Thread.Sleep(2000);
using (var conn = new RedisConnection("localhost", 6380))
{
conn.Open();
conn.Strings.GetString(0, "nome").Result.ShouldEqual("joão");
}
this.redisMaster.Kill();
Thread.Sleep(2000);
using (var conn = new RedisConnection("localhost", 6380))
{
conn.Open();
conn.Strings.GetString(0, "nome").Result.ShouldEqual("joão");
conn.Strings.Set(0, "idade", "27");
conn.Strings.GetString(0, "idade").Result.ShouldEqual("27");
}
Debug.WriteLine("Fim");
}
public void CanNotOpenNonsenseConnection_DNS()
{
using (var conn = new RedisConnection("doesnot.exist.ds.aasd981230d.com", 6500))
{
conn.Wait(conn.Open());
}
}
public void CanNotOpenNonsenseConnection()
{
using (var conn = new RedisConnection("127.0.0.1", 6500))
{
conn.Wait(conn.Open());
}
}
public List<CanvasBrushAction> GetBrushActions(string canvasId, int currentPosition)
{
List<CanvasBrushAction> actions = new List<CanvasBrushAction>();
string[] storedActions = null;
using (var conn = new RedisConnection(_redisConfiguration.HostName, _redisConfiguration.
Port, password: _redisConfiguration.Password))
{
conn.Open();
var rangeTask = conn.Lists.RangeString(0, ACTION_PREFIX + canvasId, currentPosition,
Int32.MaxValue);
storedActions = rangeTask.Result;
}
if (storedActions != null)
{
foreach (string storedAction in storedActions)
{
actions.Add(JsonConvert.DeserializeObject<CanvasBrushAction>(storedAction));
}
actions.Sort(new Comparison<CanvasBrushAction>((a, b) =>
{
return a.Sequence.
CompareTo(b.Sequence);
}));
}
return actions;
}
public static int Main(string[] args)
{
Logger.Info("Application started.");
AppDomain.CurrentDomain.UnhandledException += OnUnhandledApplicationException;
// Log the exception, but do not mark it as observed. The process will be terminated and restarted
// automatically by AppHarbor
TaskScheduler.UnobservedTaskException +=
(sender, e) => Logger.ErrorException("An unobserved task exception occurred", e.Exception);
try
{
connection = GetOpenConnection();
ProcessQueue(new[] { "queue:execute" });
}
catch (Exception ex)
{
Logger.ErrorException("An error occured while processing the queue.", ex);
}
Logger.Info("Application ending.");
return -1; // Return a non-zero code so AppHarbor restarts the worker
}
public RedisConnection GetOpen()
{
lock (syncConnection)
{
if (_Connection != null && !(_Connection.State == RedisConnectionBase.ConnectionState.Closed || _Connection.State == RedisConnectionBase.ConnectionState.Closing))
{
return _Connection;
}
if (_Connection == null || (_Connection.State == RedisConnectionBase.ConnectionState.Closed || _Connection.State == RedisConnectionBase.ConnectionState.Closing))
{
try
{
RoqueTrace.Source.Trace(TraceEventType.Information, "[REDIS] connecting to {0}:{1}", _Host, _Port);
_Connection = new RedisConnection(_Host, _Port, _Timeout);
var openAsync = _Connection.Open();
_Connection.Wait(openAsync);
RoqueTrace.Source.Trace(TraceEventType.Information, "[REDIS] connected");
}
catch (Exception ex)
{
RoqueTrace.Source.Trace(TraceEventType.Error, "[REDIS] error connecting to {0}:{1}, {2}", _Host, _Port, ex.Message, ex);
throw;
}
}
return _Connection;
}
}
// could also be void; only a Task here so I can Wait on
// completion from my Main method, which is not declared
// as async
async static Task AsyncRedisUsage()
{
const int db = 4; // no reason
using(var conn = new RedisConnection("127.0.0.1"))
{
// let's wait until all handshakes have happened
await conn.Open();
var existed = conn.Keys.Remove(db, "some-key");
for (int i = 0; i < 100; i++)
{ // this are also tasks, but I don't
// need to wait on them in this case
#pragma warning disable 4014
conn.Strings.Increment(db, "some-key");
#pragma warning restore 4014
}
// at this point, some messages are flying around
// from a background queue, with responses being
// handled by IOCP; let's add a GET onto the
// bottom of the queue, and let other stuff
// happen until we have the answer (obviously
// we could make much more subtle use here, by
// awaiting multiple things requested much earlier,
// or by doing some SQL Server work etc before
// calling await, essentially acting as a "join")
string result = await conn.Strings.GetString(db, "some-key");
Console.WriteLine(await existed
? "(it already existed; we removed it)"
: "(it didn't exist)");
Console.WriteLine(result);
}
}
public bool ConnectionReady()
{
if (_redisConnection == null || _redisConnection.State != RedisConnectionBase.ConnectionState.Open)
{
lock (_connectionLock)
{
if (_redisConnection == null || _redisConnection.State != RedisConnectionBase.ConnectionState.Open)
{
_redisConnection = new RedisConnection(Host, Port, password: Password);
try
{
_redisConnection.Open();
_subscriberConnection = _redisConnection.GetOpenSubscriberChannel();
_subscriberConnection.MessageReceived += OnRedisMessageReceived;
_subscriberConnection.Error += OnRedisError;
return true;
}
catch (Exception ex)
{
return false;
}
}
}
}
return true;
}
private bool ConnectionReady()
{
if (_redisConnection == null || _redisConnection.State != RedisConnectionBase.ConnectionState.Open)
{
lock (_connectionLock)
{
if (_redisConnection == null || _redisConnection.State != RedisConnectionBase.ConnectionState.Open)
{
_redisConnection = new RedisConnection(Host, Port, password: Password, maxUnsent: 1);
try
{
_redisConnection.Open().Wait();
return true;
}
catch (Exception ex)
{
return false;
}
}
}
}
return true;
}
public void CanNotOpenNonsenseConnection_IP()
{
using (var conn = new RedisConnection(Config.LocalHost, 6500))
{
conn.Wait(conn.Open());
}
}
public static void foo()
{
using (var redis = new RedisConnection("goosefish.redistogo.com", 9836, -1, "88f5c87381f5564b18b4ecba2647e9ab")) {
redis.Open();
redis.Lists.AddLast(1, "w00t", "t00t");
}
}
public void should_result_in_field5_with_6()
{
using (var client = new RedisConnection("localhost"))
{
client.Open();
var redis = new RedisBooksleeveConnector(client);
var key = "hello";
var field1 = "world";
var field2 = "world2";
var field3 = "w3";
var field4 = "w4";
var field5 = "w5";
var field6 = "w6";
redis.HSet(key, field1, "1");
redis.HSet(key, field2, "2");
redis.HSet(key, field3, "3");
redis.HSet(key, field4, "4");
redis.HSet(key, field5, "5");
redis.HSet(key, field6, "6");
var result = redis.HGetAll(key);
Assert.That(result[field5], Is.EqualTo("5"));
}
}
public Task<RedisConnection> CreateRedisConnection()
{
var settings = RedisConnectionProvider.Instance.ConnectionsSettings;
var redisConnection = new RedisConnection(host: settings["host"], port: Convert.ToInt32(settings["port"]), password: settings["password"]);
var taskCreateConnection = new TaskCompletionSource<RedisConnection>();
try
{
redisConnection.Open().ContinueWith((task) =>
{
if (!task.IsFaulted)
{
taskCreateConnection.SetResult(redisConnection);
}
else
{
task.Exception.Handle(x => true);
taskCreateConnection.SetException(task.Exception);
}
}, TaskScheduler.Default);
}
catch (Exception ex)
{
taskCreateConnection.SetException(ex);
}
return taskCreateConnection.Task;
}
public void ClearData()
{
connection = new RedisConnection("localhost", 6379, -1, null, 2147483647, true,10000);
subject = new RedisRepository(connection);
connection.Open();
connection.Server.FlushDb(db);
}
public RedisMessageBus(string server, int port, string password, int db, IEnumerable<string> keys, IDependencyResolver resolver)
: base(resolver)
{
_db = db;
_keys = keys.ToArray();
_connection = new RedisConnection(host: server, port: port, password: password);
_connection.Closed += OnConnectionClosed;
_connection.Error += OnConnectionError;
// Start the connection
_connectTask = _connection.Open().Then(() =>
{
// Create a subscription channel in redis
_channel = _connection.GetOpenSubscriberChannel();
// Subscribe to the registered connections
_channel.Subscribe(_keys, OnMessage);
// Dirty hack but it seems like subscribe returns before the actual
// subscription is properly setup in some cases
while (_channel.SubscriptionCount == 0)
{
Thread.Sleep(500);
}
});
}
private async static Task WithRedisAsync(Func<RedisConnection, Task> func)
{
using (var conn = new RedisConnection("localhost"))
{
await conn.Open();
await func(conn);
}
}
//
// GET: /ABResults/
public async Task<ActionResult> Index()
{
using (var conn = new RedisConnection("localhost"))
{
await conn.Open();
return View(await conn.Keys.Find(0, "*"));
}
}
public void Clear()
{
using (var connection = new RedisConnection(Host, Port, -1, Password))
{
connection.Open().Wait();
connection.Keys.Remove(Db, REDISMESSAGESKEY).Wait();
}
}
public RedisActivityMonitorTests()
{
redis = new RedisConnection("localhost", allowAdmin: true);
sut = new RedisActivityMonitor(redis);
redis.Wait(redis.Open());
redis.Wait(redis.Server.FlushDb(0));
}
private static void WithRedis(Action<RedisConnection> action)
{
using (var conn = new RedisConnection("localhost"))
{
conn.Open();
action(conn);
}
}
public void LogSuccess(string actionName, string viewName)
{
using (var conn = new RedisConnection("localhost"))
{
conn.Open();
conn.Strings.Increment(0, String.Format("{0}.{1}.success", actionName, viewName));
}
}
public RedisSessionItemHash(string sessionId, int timeoutMinutes, RedisConnection redisConnection)
: base()
{
this.sessionId = sessionId;
this.timeoutMinutes = timeoutMinutes;
this.redis = redisConnection;
SetTasks = new List<Task>();
}
/// <summary>
/// Builds the repository from scratch to ensure a cold start
/// </summary>
public void Build()
{
this.connection = new RedisConnection(this.connectionString.Split(':')[0], Convert.ToInt32(this.connectionString.Split(':')[1]), allowAdmin: true);
Serializer.PrepareSerializer<University>();
this.connection.Open();
Task task = this.connection.Server.FlushDb(0);
task.Wait();
}
SteamManager()
{
redis = new RedisConnection( "localhost" );
// the main monitor will bootstrap the CM list
mainMonitor = new MasterMonitor();
monitors = new Dictionary<IPEndPoint, Monitor>();
}
public TestPackage(RedisConnection conn)
{
Redis = new RedisBooksleeveConnector(conn);
var redisFS = new Resque.FailureService(new RedisBackendFactory(Redis));
UnderTest = new Resque.Resque(new JobCreator(), redisFS, Redis);
conn.Wait(conn.Keys.Remove(0, Redis.KeyInNamespace("queue:testQueue")));
}
internal RedisTransaction(RedisConnection parent) : base(parent)
{
this.parent = parent;
}
private static void ConnectToNodes(TextWriter log, string tieBreakerKey, int syncTimeout, int keepAlive, bool allowAdmin, string clientName, string[] arr, List <RedisConnection> connections, out Task <string>[] infos, out Task <string>[] aux, AuxMode mode)
{
TraceWriteTime("Infos");
infos = new Task <string> [arr.Length];
aux = new Task <string> [arr.Length];
var opens = new Task[arr.Length];
for (int i = 0; i < arr.Length; i++)
{
var option = arr[i];
if (string.IsNullOrWhiteSpace(option))
{
continue;
}
RedisConnection conn = null;
try
{
var parts = option.Split(':');
if (parts.Length == 0)
{
continue;
}
string host = parts[0].Trim();
int port = 6379, tmp;
if (parts.Length > 1 && int.TryParse(parts[1].Trim(), out tmp))
{
port = tmp;
}
conn = new RedisConnection(host, port, syncTimeout: syncTimeout, allowAdmin: allowAdmin);
conn.Name = clientName;
log.WriteLine("Opening connection to {0}:{1}...", host, port);
if (keepAlive >= 0)
{
conn.SetKeepAlive(keepAlive);
}
opens[i] = conn.Open();
var info = conn.GetInfoImpl(null, false, false);
connections.Add(conn);
infos[i] = info;
switch (mode)
{
case AuxMode.TieBreakers:
if (tieBreakerKey != null)
{
aux[i] = conn.Strings.GetString(0, tieBreakerKey);
}
break;
case AuxMode.ClusterNodes:
aux[i] = conn.Cluster.GetNodes();
break;
}
}
catch (Exception ex)
{
if (conn == null)
{
log.WriteLine("Error parsing option \"{0}\": {1}", option, ex.Message);
}
else
{
log.WriteLine("Error connecting: {0}", ex.Message);
}
}
}
TraceWriteTime("Wait for infos");
RedisConnectionBase.Trace("select-create", "wait...");
var watch = new Stopwatch();
foreach (Task task in infos.Concat(aux).Concat(opens))
{
if (task != null)
{
try
{
int remaining = unchecked ((int)(syncTimeout - watch.ElapsedMilliseconds));
if (remaining > 0)
{
task.Wait(remaining);
}
}
catch { }
}
}
watch.Stop();
RedisConnectionBase.Trace("select-create", "complete");
}
public MessageResultScript(RedisConnection connection, bool inferStrings, object state = null) : base(state)
{
this.connection = connection;
this.inferStrings = inferStrings;
}
private static RedisConnection SelectAndCreateConnection(string configuration, TextWriter log,
out string selectedConfiguration,
out string[] availableEndpoints, bool autoMaster,
string newMaster = null, string tieBreakerKey = null)
{
if (tieBreakerKey == null)
{
tieBreakerKey = "__Booksleeve_TieBreak"; // default tie-breaker key
}
int syncTimeout;
bool allowAdmin;
string serviceName;
string clientName;
if (log == null)
{
log = new StringWriter();
}
string[] arr = GetConfigurationOptions(configuration, out syncTimeout, out allowAdmin, out serviceName,
out clientName);
if (!string.IsNullOrWhiteSpace(newMaster))
{
allowAdmin = true; // need this to diddle the slave/master config
}
log.WriteLine("{0} unique nodes specified", arr.Length);
log.WriteLine("sync timeout: {0}ms, admin commands: {1}", syncTimeout,
allowAdmin ? "enabled" : "disabled");
if (!string.IsNullOrEmpty(serviceName))
{
log.WriteLine("service: {0}", serviceName);
}
if (!string.IsNullOrEmpty(clientName))
{
log.WriteLine("client: {0}", clientName);
}
if (arr.Length == 0)
{
log.WriteLine("No nodes to consider");
selectedConfiguration = null;
availableEndpoints = new string[0];
return(null);
}
var connections = new List <RedisConnection>(arr.Length);
RedisConnection preferred = null;
try
{
var infos = new List <Task <string> >(arr.Length);
var tiebreakers = new List <Task <string> >(arr.Length);
foreach (string option in arr)
{
if (string.IsNullOrWhiteSpace(option))
{
continue;
}
RedisConnection conn = null;
try
{
string[] parts = option.Split(':');
if (parts.Length == 0)
{
continue;
}
string host = parts[0].Trim();
int port = 6379, tmp;
if (parts.Length > 1 && int.TryParse(parts[1].Trim(), out tmp))
{
port = tmp;
}
conn = new RedisConnection(host, port, syncTimeout: syncTimeout, allowAdmin: allowAdmin);
conn.Name = clientName;
log.WriteLine("Opening connection to {0}:{1}...", host, port);
conn.Open();
Task <string> info = conn.GetInfo();
Task <string> tiebreak = conn.Strings.GetString(0, tieBreakerKey);
connections.Add(conn);
infos.Add(info);
tiebreakers.Add(tiebreak);
}
catch (Exception ex)
{
if (conn == null)
{
log.WriteLine("Error parsing option \"{0}\": {1}", option, ex.Message);
}
else
{
log.WriteLine("Error connecting: {0}", ex.Message);
}
}
}
List <RedisConnection> masters = new List <RedisConnection>(), slaves = new List <RedisConnection>();
var breakerScores = new Dictionary <string, int>();
foreach (var tiebreak in tiebreakers)
{
try
{
if (tiebreak.Wait(syncTimeout))
{
string key = tiebreak.Result;
if (string.IsNullOrWhiteSpace(key))
{
continue;
}
int score;
if (breakerScores.TryGetValue(key, out score))
{
breakerScores[key] = score + 1;
}
else
{
breakerScores.Add(key, 1);
}
}
}
catch
{
/* if a node is down, that's fine too */
}
}
// see if any of our nodes are sentinels that know about the named service
List <Tuple <RedisConnection, Task <Tuple <string, int> > > > sentinelNodes = null;
foreach (RedisConnection conn in connections)
{
// the "wait" we did during tie-breaker detection means we should now know what each server is
if (conn.ServerType == ServerType.Sentinel)
{
if (string.IsNullOrEmpty(serviceName))
{
log.WriteLine("Sentinel discovered, but no serviceName was specified; ignoring {0}:{1}",
conn.Host, conn.Port);
}
else
{
log.WriteLine("Querying sentinel {0}:{1} for {2}...", conn.Host, conn.Port, serviceName);
if (sentinelNodes == null)
{
sentinelNodes = new List <Tuple <RedisConnection, Task <Tuple <string, int> > > >();
}
sentinelNodes.Add(Tuple.Create(conn, conn.QuerySentinelMaster(serviceName)));
}
}
}
// wait for sentinel results, if any
if (sentinelNodes != null)
{
var discoveredPairs = new Dictionary <Tuple <string, int>, int>();
foreach (var pair in sentinelNodes)
{
RedisConnection conn = pair.Item1;
try
{
Tuple <string, int> master = conn.Wait(pair.Item2);
if (master == null)
{
log.WriteLine("Sentinel {0}:{1} is not configured for {2}", conn.Host, conn.Port,
serviceName);
}
else
{
log.WriteLine("Sentinel {0}:{1} nominates {2}:{3}", conn.Host, conn.Port, master.Item1,
master.Item2);
int count;
if (discoveredPairs.TryGetValue(master, out count))
{
count = 0;
}
discoveredPairs[master] = count + 1;
}
}
catch (Exception ex)
{
log.WriteLine("Error from sentinel {0}:{1} - {2}", conn.Host, conn.Port, ex.Message);
}
}
Tuple <string, int> finalChoice;
switch (discoveredPairs.Count)
{
case 0:
log.WriteLine("No sentinels nominated a master; unable to connect");
finalChoice = null;
break;
case 1:
finalChoice = discoveredPairs.Single().Key;
log.WriteLine("Sentinels nominated unanimous master: {0}:{1}", finalChoice.Item1,
finalChoice.Item2);
break;
default:
finalChoice = discoveredPairs.OrderByDescending(kvp => kvp.Value).First().Key;
log.WriteLine("Sentinels nominated multiple masters; choosing arbitrarily: {0}:{1}",
finalChoice.Item1, finalChoice.Item2);
break;
}
if (finalChoice != null)
{
RedisConnection toBeDisposed = null;
try
{
// good bet that in this scenario the input didn't specify any actual redis servers, so we'll assume open a new one
log.WriteLine("Opening nominated master: {0}:{1}...", finalChoice.Item1, finalChoice.Item2);
toBeDisposed = new RedisConnection(finalChoice.Item1, finalChoice.Item2,
allowAdmin: allowAdmin, syncTimeout: syncTimeout);
toBeDisposed.Wait(toBeDisposed.Open());
if (toBeDisposed.ServerType == ServerType.Master)
{
RedisConnection tmp = toBeDisposed;
toBeDisposed = null; // so we don't dispose it
selectedConfiguration = tmp.Host + ":" + tmp.Port;
availableEndpoints = new[] { selectedConfiguration };
return(tmp);
}
else
{
log.WriteLine("Server is {0} instead of a master", toBeDisposed.ServerType);
}
}
catch (Exception ex)
{
log.WriteLine("Error: {0}", ex.Message);
}
finally
{
// dispose if something went sour
using (toBeDisposed)
{
}
}
}
// something went south; BUT SENTINEL WINS TRUMPS; quit now
selectedConfiguration = null;
availableEndpoints = new string[0];
return(null);
}
// check for tie-breakers (i.e. when we store which is the master)
switch (breakerScores.Count)
{
case 0:
log.WriteLine("No tie-breakers found ({0})", tieBreakerKey);
break;
case 1:
log.WriteLine("Tie-breaker ({0}) is unanimous: {1}", tieBreakerKey, breakerScores.Keys.Single());
break;
default:
log.WriteLine("Ambiguous tie-breakers ({0}):", tieBreakerKey);
foreach (var kvp in breakerScores.OrderByDescending(x => x.Value))
{
log.WriteLine("\t{0}: {1}", kvp.Key, kvp.Value);
}
break;
}
for (int i = 0; i < connections.Count; i++)
{
log.WriteLine("Reading configuration from {0}:{1}...", connections[i].Host, connections[i].Port);
try
{
if (!infos[i].Wait(syncTimeout))
{
log.WriteLine("\tTimeout fetching INFO");
continue;
}
var infoPairs = new StringDictionary();
using (var sr = new StringReader(infos[i].Result))
{
string line;
while ((line = sr.ReadLine()) != null)
{
int idx = line.IndexOf(':');
if (idx < 0)
{
continue;
}
string key = line.Substring(0, idx).Trim(),
value = line.Substring(idx + 1, line.Length - (idx + 1)).Trim();
infoPairs[key] = value;
}
}
string role = infoPairs["role"];
switch (role)
{
case "slave":
log.WriteLine("\tServer is SLAVE of {0}:{1}",
infoPairs["master_host"], infoPairs["master_port"]);
log.Write("\tLink is {0}, seen {1} seconds ago",
infoPairs["master_link_status"], infoPairs["master_last_io_seconds_ago"]);
if (infoPairs["master_sync_in_progress"] == "1")
{
log.Write(" (sync is in progress)");
}
log.WriteLine();
slaves.Add(connections[i]);
break;
case "master":
log.WriteLine("\tServer is MASTER, with {0} slaves", infoPairs["connected_slaves"]);
masters.Add(connections[i]);
break;
default:
log.WriteLine("\tUnknown role: {0}", role);
break;
}
string tmp = infoPairs["connected_clients"];
int clientCount, channelCount, patternCount;
if (string.IsNullOrWhiteSpace(tmp) || !int.TryParse(tmp, out clientCount))
{
clientCount = -1;
}
tmp = infoPairs["pubsub_channels"];
if (string.IsNullOrWhiteSpace(tmp) || !int.TryParse(tmp, out channelCount))
{
channelCount = -1;
}
tmp = infoPairs["pubsub_patterns"];
if (string.IsNullOrWhiteSpace(tmp) || !int.TryParse(tmp, out patternCount))
{
patternCount = -1;
}
log.WriteLine("\tClients: {0}; channels: {1}; patterns: {2}", clientCount, channelCount,
patternCount);
}
catch (Exception ex)
{
log.WriteLine("\tError reading INFO results: {0}", ex.Message);
}
}
if (newMaster == null)
{
switch (masters.Count)
{
case 0:
switch (slaves.Count)
{
case 0:
log.WriteLine("No masters or slaves found");
break;
case 1:
log.WriteLine("No masters found; selecting single slave");
preferred = slaves[0];
break;
default:
log.WriteLine("No masters found; considering {0} slaves...", slaves.Count);
preferred = SelectWithTieBreak(log, slaves, breakerScores);
break;
}
if (preferred != null)
{
if (autoMaster)
{
//LogException("Promoting redis SLAVE to MASTER");
log.WriteLine("Promoting slave to master...");
if (allowAdmin)
{
// can do on this connection
preferred.Wait(preferred.Server.MakeMaster());
}
else
{
// need an admin connection for this
using (
var adminPreferred = new RedisConnection(preferred.Host, preferred.Port,
allowAdmin: true,
syncTimeout: syncTimeout))
{
adminPreferred.Open();
adminPreferred.Wait(adminPreferred.Server.MakeMaster());
}
}
}
else
{
log.WriteLine("Slave should be promoted to master (but not done yet)...");
}
}
break;
case 1:
log.WriteLine("One master found; selecting");
preferred = masters[0];
break;
default:
log.WriteLine("Considering {0} masters...", masters.Count);
preferred = SelectWithTieBreak(log, masters, breakerScores);
break;
}
}
else
{
// we have been instructed to change master server
preferred = masters.Concat(slaves)
.FirstOrDefault(conn => (conn.Host + ":" + conn.Port) == newMaster);
if (preferred == null)
{
log.WriteLine("Selected new master not available: {0}", newMaster);
}
else
{
int errorCount = 0;
try
{
log.WriteLine("Promoting to master: {0}:{1}...", preferred.Host, preferred.Port);
preferred.Wait(preferred.Server.MakeMaster());
// if this is a master, we expect set/publish to work, even on 2.6
preferred.Strings.Set(0, tieBreakerKey, newMaster);
preferred.Wait(preferred.Publish(RedisMasterChangedChannel, newMaster));
}
catch (Exception ex)
{
log.WriteLine("\t{0}", ex.Message);
errorCount++;
}
if (errorCount == 0) // only make slaves if the master was happy
{
foreach (RedisConnection conn in masters.Concat(slaves))
{
if (conn == preferred)
{
continue; // can't make self a slave!
}
try
{
log.WriteLine("Enslaving: {0}:{1}...", conn.Host, conn.Port);
// try to set the tie-breaker **first** in case of problems
Task didSet = conn.Strings.Set(0, tieBreakerKey, newMaster);
// and broadcast to anyone who thinks this is the master
Task <long> didPublish = conn.Publish(RedisMasterChangedChannel, newMaster);
// now make it a slave
Task didEnslave = conn.Server.MakeSlave(preferred.Host, preferred.Port);
// these are best-effort only; from 2.6, readonly slave servers may reject these commands
try
{
conn.Wait(didSet);
}
catch
{
}
try
{
conn.Wait(didPublish);
}
catch
{
}
// but this one we'll log etc
conn.Wait(didEnslave);
}
catch (Exception ex)
{
log.WriteLine("\t{0}", ex.Message);
errorCount++;
}
}
}
if (errorCount != 0)
{
log.WriteLine("Things didn't go smoothly; CHECK WHAT HAPPENED!");
}
// want the connection disposed etc
preferred = null;
}
}
if (preferred == null)
{
selectedConfiguration = null;
}
else
{
selectedConfiguration = preferred.Host + ":" + preferred.Port;
log.WriteLine("Selected server {0}", selectedConfiguration);
}
availableEndpoints = (from conn in masters.Concat(slaves)
select conn.Host + ":" + conn.Port).ToArray();
return(preferred);
}
finally
{
foreach (RedisConnection conn in connections)
{
if (conn != null && conn != preferred)
{
try
{
conn.Dispose();
}
catch
{
}
}
}
}
}
/// <summary>
/// Creates a child RedisConnection, such as for a RedisTransaction
/// </summary>
protected RedisConnection(RedisConnection parent) : base(
parent.Host, parent.Port, parent.IOTimeout, parent.Password, int.MaxValue, parent.SyncTimeout)
{
allowAdmin = parent.allowAdmin;
sent = new Queue <RedisMessage>();
}