//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void pageFaultsFromReplicationMustCountInMetrics() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void PageFaultsFromReplicationMustCountInMetrics()
{
// Given initial pin counts on all members
//JAVA TO C# CONVERTER WARNING: Java wildcard generics have no direct equivalent in .NET:
//ORIGINAL LINE: org.neo4j.causalclustering.discovery.Cluster<?> cluster = clusterRule.startCluster();
Cluster <object> cluster = ClusterRule.startCluster();
System.Func <ReadReplica, PageCacheCounters> getPageCacheCounters = ccm => ccm.database().DependencyResolver.resolveDependency(typeof(PageCacheCounters));
IList <PageCacheCounters> countersList = cluster.ReadReplicas().Select(getPageCacheCounters).ToList();
//JAVA TO C# CONVERTER TODO TASK: Method reference arbitrary object instance method syntax is not converted by Java to C# Converter:
long[] initialPins = countersList.Select(PageCacheCounters::pins).ToArray();
// when the leader commits a write transaction,
cluster.CoreTx((db, tx) =>
{
Node node = Db.createNode(label("boo"));
node.setProperty("foobar", "baz_bat");
tx.success();
});
// then the replication should cause pins on a majority of core members to increase.
// However, the commit returns as soon as the transaction has been replicated through the Raft log, which
// happens before the transaction is applied on the members, and then replicated to read-replicas.
// Therefor we are racing with the transaction application on the read-replicas, so we have to spin.
int minimumUpdatedMembersCount = countersList.Count / 2 + 1;
assertEventually("Expected followers to eventually increase pin counts", () =>
{
long[] pinsAfterCommit = countersList.Select(PageCacheCounters.pins).ToArray();
int membersWithIncreasedPinCount = 0;
for (int i = 0; i < initialPins.Length; i++)
{
long before = initialPins[i];
long after = pinsAfterCommit[i];
if (before < after)
{
membersWithIncreasedPinCount++;
}
}
return(membersWithIncreasedPinCount);
}, Matchers.@is(greaterThanOrEqualTo(minimumUpdatedMembersCount)), 10, SECONDS);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test void streamFilesRecursiveMustBeEmptyForEmptyBaseDirectory() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal virtual void StreamFilesRecursiveMustBeEmptyForEmptyBaseDirectory()
{
File dir = ExistingDirectory("dir");
assertThat(Fsa.streamFilesRecursive(dir).count(), Matchers.@is(0L));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void leaderShouldStepDownWhenFollowersAreGone() throws Throwable
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void LeaderShouldStepDownWhenFollowersAreGone()
{
// when
//JAVA TO C# CONVERTER WARNING: Java wildcard generics have no direct equivalent in .NET:
//ORIGINAL LINE: org.neo4j.causalclustering.discovery.Cluster<?> cluster = clusterRule.startCluster();
Cluster <object> cluster = ClusterRule.startCluster();
//Do some work to make sure the cluster is operating normally.
CoreClusterMember leader = cluster.CoreTx((db, tx) =>
{
Node node = Db.createNode(Label.label("bam"));
node.setProperty("bam", "bam");
tx.success();
});
ThrowingSupplier <IList <CoreClusterMember>, Exception> followers = () => cluster.CoreMembers().Where(m => m.raft().currentRole() != Role.LEADER).ToList();
assertEventually("All followers visible", followers, Matchers.hasSize(7), 2, TimeUnit.MINUTES);
//when
//shutdown 4 servers, leaving 4 remaining and therefore not a quorum.
followers.Get().subList(0, 4).forEach(CoreClusterMember.shutdown);
//then
assertEventually("Leader should have stepped down.", () => leader.Raft().Leader, Matchers.@is(false), 2, TimeUnit.MINUTES);
}