public virtual void TestSingleThreaded()
{
Configuration conf = new Configuration();
MiniJournalCluster cluster = new MiniJournalCluster.Builder(conf).Build();
URI uri = cluster.GetQuorumJournalURI(Jid);
QuorumJournalManager qjm = new QuorumJournalManager(conf, uri, FakeNsinfo);
try
{
qjm.Format(FakeNsinfo);
}
finally
{
qjm.Close();
}
try
{
// With no failures or contention, epochs should increase one-by-one
for (int i = 0; i < 5; i++)
{
qjm = new QuorumJournalManager(conf, uri, FakeNsinfo);
try
{
qjm.CreateNewUniqueEpoch();
NUnit.Framework.Assert.AreEqual(i + 1, qjm.GetLoggerSetForTests().GetEpoch());
}
finally
{
qjm.Close();
}
}
long prevEpoch = 5;
// With some failures injected, it should still always increase, perhaps
// skipping some
for (int i_1 = 0; i_1 < 20; i_1++)
{
long newEpoch = -1;
while (true)
{
qjm = new QuorumJournalManager(conf, uri, FakeNsinfo, new TestEpochsAreUnique.FaultyLoggerFactory
(this));
try
{
qjm.CreateNewUniqueEpoch();
newEpoch = qjm.GetLoggerSetForTests().GetEpoch();
break;
}
catch (IOException)
{
}
finally
{
// It's OK to fail to create an epoch, since we randomly inject
// faults. It's possible we'll inject faults in too many of the
// underlying nodes, and a failure is expected in that case
qjm.Close();
}
}
Log.Info("Created epoch " + newEpoch);
NUnit.Framework.Assert.IsTrue("New epoch " + newEpoch + " should be greater than previous "
+ prevEpoch, newEpoch > prevEpoch);
prevEpoch = newEpoch;
}
}
finally
{
cluster.Shutdown();
}
}
