public static void Main()
{
using (IIgnite ignite = Ignition.Start(Utils.GetServerNodeConfiguration()))
{
Console.WriteLine();
Console.WriteLine(">>> Atomic reference example started.");
// Create atomic reference with a value of empty Guid.
IAtomicReference <Guid> atomicRef = ignite.GetAtomicReference(
AtomicReferenceModifyAction.AtomicReferenceName, Guid.Empty, true);
// Make sure initial value is set to Empty.
atomicRef.Write(Guid.Empty);
// Attempt to modify the value on each node. Only one node will succeed.
ignite.GetCompute().Broadcast(new AtomicReferenceModifyAction());
// Print current value which is equal to the Id of the node that has modified the reference first.
Console.WriteLine("\n>>> Current atomic reference value: " + atomicRef.Read());
}
Console.WriteLine();
Console.WriteLine(">>> Example finished, press any key to exit ...");
Console.ReadKey();
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldCorrectlyReturnCoreMemberRoles()
public virtual void ShouldCorrectlyReturnCoreMemberRoles()
{
//given
int numMembers = 3;
IList <MemberId> members = IntStream.range(0, numMembers).mapToObj(ignored => new MemberId(System.Guid.randomUUID())).collect(Collectors.toList());
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @SuppressWarnings("unchecked") com.hazelcast.core.IAtomicReference<org.neo4j.causalclustering.core.consensus.LeaderInfo> leaderRef = mock(com.hazelcast.core.IAtomicReference.class);
IAtomicReference <LeaderInfo> leaderRef = mock(typeof(IAtomicReference));
MemberId chosenLeaderId = members[0];
when(leaderRef.get()).thenReturn(new LeaderInfo(chosenLeaderId, 0L));
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @SuppressWarnings("unchecked") com.hazelcast.core.IMap<String,java.util.UUID> uuidDBMap = mock(com.hazelcast.core.IMap.class);
IMap <string, System.Guid> uuidDBMap = mock(typeof(IMap));
when(uuidDBMap.Keys).thenReturn(Collections.singleton(DEFAULT_DB_NAME));
when(_hzInstance.getAtomicReference <LeaderInfo>(startsWith(DB_NAME_LEADER_TERM_PREFIX))).thenReturn(leaderRef);
when(_hzInstance.getMap <string, System.Guid>(eq(CLUSTER_UUID_DB_NAME_MAP))).thenReturn(uuidDBMap);
// when
IDictionary <MemberId, RoleInfo> roleMap = HazelcastClusterTopology.GetCoreRoles(_hzInstance, new HashSet <MemberId, RoleInfo>(members));
// then
assertEquals("First member was expected to be leader.", RoleInfo.Leader, roleMap[chosenLeaderId]);
}
internal static void CasLeaders(HazelcastInstance hazelcastInstance, LeaderInfo leaderInfo, string dbName, Log log)
{
IAtomicReference <LeaderInfo> leaderRef = hazelcastInstance.getAtomicReference(DB_NAME_LEADER_TERM_PREFIX + dbName);
LeaderInfo current = leaderRef.get();
Optional <LeaderInfo> currentOpt = Optional.ofNullable(current);
//JAVA TO C# CONVERTER TODO TASK: Method reference arbitrary object instance method syntax is not converted by Java to C# Converter:
bool sameLeader = currentOpt.map(LeaderInfo::memberId).Equals(Optional.ofNullable(leaderInfo.MemberId()));
int termComparison = currentOpt.map(l => Long.compare(l.term(), leaderInfo.Term())).orElse(-1);
bool greaterTermExists = termComparison > 0;
bool sameTermButNoStepdown = termComparison == 0 && !leaderInfo.SteppingDown;
if (sameLeader || greaterTermExists || sameTermButNoStepdown)
{
return;
}
bool success = leaderRef.compareAndSet(current, leaderInfo);
if (!success)
{
log.Warn("Fail to set new leader info: %s. Latest leader info: %s.", leaderInfo, leaderRef.get());
}
}
/// <summary>
/// Invokes action.
/// </summary>
public void Invoke()
{
// Get or create the atomic reference.
IAtomicReference <Guid> atomicRef = _ignite.GetAtomicReference(AtomicReferenceName, Guid.Empty, true);
// Get local node id.
Guid localNodeId = _ignite.GetCluster().GetLocalNode().Id;
// Replace empty value with current node id.
Guid expectedValue = Guid.Empty;
Guid originalValue = atomicRef.CompareExchange(localNodeId, expectedValue);
if (originalValue == expectedValue)
{
Console.WriteLine(">>> Successfully updated atomic reference on node {0}", localNodeId);
}
else
{
Console.WriteLine(">>> Failed to update atomic reference on node {0}, actual value is {1}",
localNodeId, originalValue);
}
}
public static void Main()
{
using (var ignite = Ignition.StartFromApplicationConfiguration())
{
Console.WriteLine();
Console.WriteLine(">>> Atomic reference example started.");
IAtomicReference <Guid> atomicRef = ignite.GetAtomicReference(
AtomicReferenceModifyAction.AtomicReferenceName, Guid.Empty, true);
atomicRef.Write(Guid.Empty);
ignite.GetCompute().Broadcast(new AtomicReferenceModifyAction());
Console.WriteLine("\n>>> Current atomic reference value: " + atomicRef.Read());
}
Console.WriteLine("\n>>> Example finished, press any key to exit ...");
Console.ReadKey();
}
private static Optional <LeaderInfo> GetLeaderForDBName(HazelcastInstance hazelcastInstance, string dbName)
{
IAtomicReference <LeaderInfo> leader = hazelcastInstance.getAtomicReference(DB_NAME_LEADER_TERM_PREFIX + dbName);
return(Optional.ofNullable(leader.get()));
}
