public void TransportDeadThenAliveTest()
{
IMemcacheNode theNode = null;
FakeTransport transport = new FakeTransport();
transport.Kill();
// Memcache client config
var config = new MemcacheClientConfiguration
{
DeadTimeout = TimeSpan.FromSeconds(1),
TransportFactory = transport.Factory,
NodeFactory = (e, c) => MemcacheClientConfiguration.DefaultNodeFactory(e, c),
PoolSize = 1,
};
theNode = config.NodeFactory(null, config);
Assert.IsFalse(theNode.IsDead, "The node should be alive before any failure");
Assert.IsFalse(theNode.TrySend(null, 1), "The TrySend should fail with a broken transport");
Assert.IsTrue(theNode.IsDead, "The node should be dead after the first send failed");
transport.Resurect();
Assert.IsFalse(theNode.IsDead, "The node should be alive after the transport resurected");
Assert.IsTrue(theNode.TrySend(null, 1), "The TrySend should be able to send a request after the transport is up again");
transport.Kill();
Assert.IsFalse(theNode.TrySend(null, 1), "The TrySend should fail with a killed transport");
Assert.IsTrue(theNode.IsDead, "The node should be dead after the a send failed");
}
public void NodeWorkingTransportsTest(int nbOfTransportsPerNode)
{
int createdTransports = 0;
int rememberPort;
var mutex = new ManualResetEventSlim(false);
Status returnStatus = Status.NoError;
MemcacheNode theNode = null;
// Memcache client config
var config = new MemcacheClientConfiguration
{
DeadTimeout = TimeSpan.FromSeconds(1),
TransportFactory = (_, __, ___, ____, _____, ______) =>
new MemcacheTransportForTest(_, __, ___, ____, _____, ______, () => { createdTransports++; }, () => { }),
NodeFactory = (_, __) =>
theNode = MemcacheClientConfiguration.DefaultNodeFactory(_, __) as MemcacheNode,
PoolSize = nbOfTransportsPerNode,
};
MemcacheClient memcacheClient;
using (var serverMock1 = new ServerMock())
{
config.NodesEndPoints.Add(serverMock1.ListenEndPoint);
rememberPort = serverMock1.ListenEndPoint.Port;
serverMock1.ResponseBody = new byte[24];
// Create a Memcache client with one node
memcacheClient = new MemcacheClient(config);
// Check that we hooked to the MemcacheNode
Assert.IsNotNull(theNode, "Did not hook to the MemcacheNode while creating the client");
// Check the number of transports that have been created
Assert.AreEqual(nbOfTransportsPerNode, createdTransports, "The number of created should be the number of configured transport");
// Check the number of working transports (meaning, connected to the server) and the node state
// By default, the transport are marked as being available upon creation of the client
Assert.AreEqual(nbOfTransportsPerNode, theNode.WorkingTransports, "The number of working transport should be the number of created transport (1)");
Assert.IsFalse(theNode.IsDead, "The node should be alive (1)");
Assert.AreEqual(1, memcacheClient.AliveNodes, "Number of alive nodes is incorrect (1)");
// Do a get to initialize one of the transports
Assert.IsTrue(memcacheClient.Get("whatever", (Status s, byte[] o) => { returnStatus = s; mutex.Set(); }), "The request should be sent correctly (1)");
Assert.IsTrue(mutex.Wait(1000), "Timeout on the get request");
Assert.AreEqual(Status.InternalError, returnStatus, "The status of the request should be InternalError (1)");
mutex.Reset();
// Check the number of working transports and the node state
Assert.AreEqual(nbOfTransportsPerNode, theNode.WorkingTransports, "The number of working transport should be the number of created transport (2)");
Assert.IsFalse(theNode.IsDead, "The node should be alive (2)");
Assert.AreEqual(1, memcacheClient.AliveNodes, "Number of alive nodes is incorrect (2)");
}
// Wait for the ServerMock to be fully disposed
Thread.Sleep(100);
// Attempt to send a request to take one of the transports out of the pool
// After that the transport should be dead
Assert.IsTrue(memcacheClient.Get("whatever", (Status s, byte[] o) => { returnStatus = s; mutex.Set(); }), "The request should be sent correctly (2)");
Assert.IsTrue(mutex.Wait(1000), "Timeout on the get request");
Assert.AreEqual(Status.InternalError, returnStatus, "The status of the request should be InternalError (2)");
mutex.Reset();
// Check the number of working transports and the node state
Assert.AreEqual(nbOfTransportsPerNode - 1, theNode.WorkingTransports, "The number of working transport should be the number of created transport minus 1");
if (nbOfTransportsPerNode == 1)
{
Assert.IsTrue(theNode.IsDead, "The node should be dead (3)");
Assert.AreEqual(0, memcacheClient.AliveNodes, "Number of alive nodes is incorrect (3)");
}
else
{
Assert.IsFalse(theNode.IsDead, "The node should be alive (3)");
Assert.AreEqual(1, memcacheClient.AliveNodes, "Number of alive nodes is incorrect (3)");
}
// A new transport has been allocated and is periodically trying to reconnect
Assert.AreEqual(nbOfTransportsPerNode + 1, createdTransports, "Expected a new transport to be created to replace the disposed one");
using (var serverMock2 = new ServerMock(rememberPort))
{
serverMock2.ResponseBody = new byte[24];
// After some delay, the transport should connect
Assert.That(() => theNode.WorkingTransports, new DelayedConstraint(new EqualConstraint(nbOfTransportsPerNode), 4000, 100), "After a while, the transport should manage to connect");
Assert.IsFalse(theNode.IsDead, "The node should be alive (4)");
Assert.AreEqual(1, memcacheClient.AliveNodes, "Number of alive nodes is incorrect (4)");
// Attempt a get
Assert.IsTrue(memcacheClient.Get("whatever", (Status s, byte[] o) => { returnStatus = s; mutex.Set(); }), "The request should be sent correctly (4)");
Assert.IsTrue(mutex.Wait(1000), "Timeout on the get request");
Assert.AreEqual(Status.InternalError, returnStatus, "The status of the request should be InternalError (4)");
mutex.Reset();
// Check the number of working transports and the node state
Assert.AreEqual(nbOfTransportsPerNode, theNode.WorkingTransports, "The number of working transport should be the number of created transport (5)");
Assert.IsFalse(theNode.IsDead, "The node should be alive (5)");
Assert.AreEqual(1, memcacheClient.AliveNodes, "Number of alive nodes is incorrect (5)");
// Dispose the client
memcacheClient.Dispose();
}
}