本文整理汇总了C#中Cluster.RefreshSchema方法的典型用法代码示例。如果您正苦于以下问题：C# Cluster.RefreshSchema方法的具体用法？C# Cluster.RefreshSchema怎么用？C# Cluster.RefreshSchema使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Cluster的用法示例。
在下文中一共展示了Cluster.RefreshSchema方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: WaitForMeta
private static void WaitForMeta(string nodeHost, Cluster cluster, int maxTry, bool waitForUp)
{
string expectedFinalNodeState = "UP";
if (!waitForUp)
expectedFinalNodeState = "DOWN";
for (int i = 0; i < maxTry; ++i)
{
try
{
// Are all nodes in the cluster accounted for?
bool disconnected = !cluster.RefreshSchema();
if (disconnected)
{
string warnStr = "While waiting for host " + nodeHost + " to be " + expectedFinalNodeState + ", the cluster is now totally down, returning now ... ";
Trace.TraceWarning(warnStr);
return;
}
Metadata metadata = cluster.Metadata;
foreach (Host host in metadata.AllHosts())
{
bool hostFound = false;
if (host.Address.ToString() == nodeHost)
{
hostFound = true;
if (host.IsUp && waitForUp)
{
Trace.TraceInformation("Verified according to cluster meta that host " + nodeHost + " is " + expectedFinalNodeState + ", returning now ... ");
return;
}
Trace.TraceWarning("We're waiting for host " + nodeHost + " to be " + expectedFinalNodeState);
}
// Is the host even in the meta list?
if (!hostFound)
{
if (!waitForUp)
{
Trace.TraceInformation("Verified according to cluster meta that host " + host.Address + " is not available in the MetaData hosts list, returning now ... ");
return;
}
else
Trace.TraceWarning("We're waiting for host " + nodeHost + " to be " + expectedFinalNodeState + ", but this host was not found in the MetaData hosts list!");
}
}
}
catch (Exception e)
{
if (e.Message.Contains("None of the hosts tried for query are available") && !waitForUp)
{
Trace.TraceInformation("Verified according to cluster meta that host " + nodeHost + " is not available in the MetaData hosts list, returning now ... ");
return;
}
Trace.TraceInformation("Exception caught while waiting for meta data: " + e.Message);
}
Trace.TraceWarning("Waiting for node host: " + nodeHost + " to be " + expectedFinalNodeState);
Thread.Sleep(DefaultSleepIterationMs);
}
string errStr = "Node host should have been " + expectedFinalNodeState + " but was not after " + maxTry + " tries!";
Trace.TraceError(errStr);
}示例2: waitFor
private static void waitFor(string node, Cluster cluster, int maxTry, bool waitForDead, bool waitForOut)
{
// In the case where the we've killed the last node in the cluster, if we haven't
// tried doing an actual query, the driver won't realize that last node is dead until'
// keep alive kicks in, but that's a fairly long time. So we cheat and trigger a force'
// the detection by forcing a request.
bool disconnected = false;
if (waitForDead || waitForOut)
disconnected = !cluster.RefreshSchema(null, null);
if (disconnected)
return;
IPAddress address;
try
{
address = IPAddress.Parse(node);
}
catch (Exception)
{
// That's a problem but that's not *our* problem
return;
}
Metadata metadata = cluster.Metadata;
for (int i = 0; i < maxTry; ++i)
{
bool found = false;
foreach (Host host in metadata.AllHosts())
{
if (host.Address.Equals(address))
{
found = true;
if (testHost(host, waitForDead))
return;
}
}
if (waitForDead && !found)
return;
try
{
Thread.Sleep(1000);
}
catch (Exception)
{
}
}
foreach (Host host in metadata.AllHosts())
{
if (host.Address.Equals(address))
{
if (testHost(host, waitForDead))
{
return;
}
// logging it because this give use the timestamp of when this happens
logger.Info(node + " is not " + (waitForDead ? "DOWN" : "UP") + " after " + maxTry + "s");
throw new InvalidOperationException(node + " is not " + (waitForDead ? "DOWN" : "UP") + " after " + maxTry + "s");
}
}
if (waitForOut)
{
}
logger.Info(node + " is not part of the cluster after " + maxTry + "s");
throw new InvalidOperationException(node + " is not part of the cluster after " + maxTry + "s");
}