internal void RegisterReadReplica(SharedDiscoveryReadReplicaClient client)
{
ReadReplicaInfo previousRR = _readReplicas.putIfAbsent(client.MemberId, client.ReadReplicainfo);
if (previousRR == null)
{
NotifyCoreClients();
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public void begin(KEY key) throws ConcurrentAccessException
public virtual void Begin(KEY key)
{
VALUE instance = _factory.newInstance();
Entry existing;
if ((existing = _repo.putIfAbsent(key, new Entry(this, instance))) != null)
{
_reaper.accept(instance); // Need to clear up our optimistically allocated value
throw new ConcurrentAccessException(string.Format("Cannot begin '{0}', because {1} with that key already exists.", key, existing));
}
}
internal void RegisterCoreMember(SharedDiscoveryCoreClient client)
{
CoreServerInfo previousMember = _coreMembers.putIfAbsent(client.MemberId, client.CoreServerInfo);
if (previousMember == null)
{
_listeningClients.Add(client);
_enoughMembers.Signal();
NotifyCoreClients();
}
}
internal bool CasClusterId(ClusterId clusterId, string dbName)
{
ClusterId previousId = _clusterIdDbNames.putIfAbsent(dbName, clusterId);
bool success = previousId == null || previousId.Equals(clusterId);
if (success)
{
NotifyCoreClients();
}
return(success);
}
public override bool TryExclusiveLock(ResourceType resourceType, long resourceId)
{
_hasLocks = true;
_stateHolder.incrementActiveClients(this);
try
{
ConcurrentMap <long, ForsetiLockManager.Lock> lockMap = _lockMaps[resourceType.TypeId()];
MutableLongIntMap heldLocks = _exclusiveLockCounts[resourceType.TypeId()];
int heldCount = heldLocks.getIfAbsent(resourceId, -1);
if (heldCount != -1)
{
// We already have a lock on this, just increment our local reference counter.
heldLocks.put(resourceId, Math.incrementExact(heldCount));
return(true);
}
// Grab the global lock
ForsetiLockManager.Lock @lock;
if ((@lock = lockMap.putIfAbsent(resourceId, _myExclusiveLock)) != null)
{
if (@lock is SharedLock && _sharedLockCounts[resourceType.TypeId()].containsKey(resourceId))
{
SharedLock sharedLock = ( SharedLock )@lock;
if (sharedLock.TryAcquireUpdateLock(this))
{
if (sharedLock.NumberOfHolders() == 1)
{
heldLocks.put(resourceId, 1);
return(true);
}
else
{
sharedLock.ReleaseUpdateLock();
return(false);
}
}
}
return(false);
}
heldLocks.put(resourceId, 1);
return(true);
}
finally
{
_stateHolder.decrementActiveClients();
}
}
//-------------------------------------------------------------------------
public override FraConvention lookup(string name)
{
FraConvention value = BY_NAME.get(name);
if (value == null)
{
FraConvention created = createByName(name);
if (created != null)
{
string correctName = created.Name;
value = BY_NAME.computeIfAbsent(correctName, k => created);
BY_NAME.putIfAbsent(correctName.ToUpper(Locale.ENGLISH), value);
}
}
return(value);
}
private AuthenticationMetadata AuthMetadataFor(string username)
{
AuthenticationMetadata authMeta = _authenticationData.get(username);
if (authMeta == null)
{
authMeta = new AuthenticationMetadata(this);
AuthenticationMetadata preExisting = _authenticationData.putIfAbsent(username, authMeta);
if (preExisting != null)
{
authMeta = preExisting;
}
}
return(authMeta);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @SuppressWarnings("SynchronizationOnLocalVariableOrMethodParameter") static <Key> void applyUpdate(ReadableState<Key> store, java.util.concurrent.ConcurrentMap<Key, ChangeEntry> changes, Key key, ValueUpdate update, boolean reset, long version) throws java.io.IOException
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
internal static void ApplyUpdate <Key>(ReadableState <Key> store, ConcurrentMap <Key, ChangeEntry> changes, Key key, ValueUpdate update, bool reset, long version)
{
ChangeEntry value = changes.get(key);
if (value == null)
{
ChangeEntry newEntry = ChangeEntry.Of(new sbyte[store.KeyFormat().valueSize()], version);
lock ( newEntry )
{
value = changes.putIfAbsent(key, newEntry);
if (value == null)
{
BigEndianByteArrayBuffer buffer = new BigEndianByteArrayBuffer(newEntry.Data);
if (!reset)
{
PreviousValue lookup = new PreviousValue(newEntry.Data);
if (!store.Lookup(key, lookup))
{
buffer.Clear();
}
}
update.Update(buffer);
return;
}
}
}
lock ( value )
{
BigEndianByteArrayBuffer target = new BigEndianByteArrayBuffer(value.Data);
value.Version = version;
if (reset)
{
target.Clear();
}
update.Update(target);
}
}
public override bool TrySharedLock(ResourceType resourceType, long resourceId)
{
_hasLocks = true;
_stateHolder.incrementActiveClients(this);
try
{
ConcurrentMap <long, ForsetiLockManager.Lock> lockMap = _lockMaps[resourceType.TypeId()];
MutableLongIntMap heldShareLocks = _sharedLockCounts[resourceType.TypeId()];
MutableLongIntMap heldExclusiveLocks = _exclusiveLockCounts[resourceType.TypeId()];
int heldCount = heldShareLocks.getIfAbsent(resourceId, -1);
if (heldCount != -1)
{
// We already have a lock on this, just increment our local reference counter.
heldShareLocks.put(resourceId, Math.incrementExact(heldCount));
return(true);
}
if (heldExclusiveLocks.containsKey(resourceId))
{
// We already have an exclusive lock, so just leave that in place. When the exclusive lock is released,
// it will be automatically downgraded to a shared lock, since we bumped the share lock reference count.
heldShareLocks.put(resourceId, 1);
return(true);
}
long waitStartMillis = _clock.millis();
while (true)
{
AssertValid(waitStartMillis, resourceType, resourceId);
ForsetiLockManager.Lock existingLock = lockMap.get(resourceId);
if (existingLock == null)
{
// Try to create a new shared lock
if (lockMap.putIfAbsent(resourceId, new SharedLock(this)) == null)
{
// Success!
break;
}
}
else if (existingLock is SharedLock)
{
// Note that there is a "safe" race here where someone may be releasing the last reference to a lock
// and thus removing that lock instance (making it unacquirable). In this case, we allow retrying,
// even though this is a try-lock call.
if ((( SharedLock )existingLock).Acquire(this))
{
// Success!
break;
}
else if ((( SharedLock )existingLock).UpdateLock)
{
return(false);
}
}
else if (existingLock is ExclusiveLock)
{
return(false);
}
else
{
throw new System.NotSupportedException("Unknown lock type: " + existingLock);
}
}
heldShareLocks.put(resourceId, 1);
return(true);
}
finally
{
_stateHolder.decrementActiveClients();
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public void acquireExclusive(org.neo4j.storageengine.api.lock.LockTracer tracer, org.neo4j.storageengine.api.lock.ResourceType resourceType, long... resourceIds) throws org.neo4j.storageengine.api.lock.AcquireLockTimeoutException
public override void AcquireExclusive(LockTracer tracer, ResourceType resourceType, params long[] resourceIds)
{
_hasLocks = true;
_stateHolder.incrementActiveClients(this);
LockWaitEvent waitEvent = null;
try
{
ConcurrentMap <long, ForsetiLockManager.Lock> lockMap = _lockMaps[resourceType.TypeId()];
MutableLongIntMap heldLocks = _exclusiveLockCounts[resourceType.TypeId()];
foreach (long resourceId in resourceIds)
{
int heldCount = heldLocks.getIfAbsent(resourceId, -1);
if (heldCount != -1)
{
// We already have a lock on this, just increment our local reference counter.
heldLocks.put(resourceId, Math.incrementExact(heldCount));
continue;
}
// Grab the global lock
ForsetiLockManager.Lock existingLock;
int tries = 0;
long waitStartMillis = _clock.millis();
while ((existingLock = lockMap.putIfAbsent(resourceId, _myExclusiveLock)) != null)
{
AssertValid(waitStartMillis, resourceType, resourceId);
// If this is a shared lock:
// Given a grace period of tries (to try and not starve readers), grab an update lock and wait
// for it to convert to an exclusive lock.
if (tries > 50 && existingLock is SharedLock)
{
// Then we should upgrade that lock
SharedLock sharedLock = ( SharedLock )existingLock;
if (TryUpgradeSharedToExclusive(tracer, waitEvent, resourceType, lockMap, resourceId, sharedLock, waitStartMillis))
{
break;
}
}
if (waitEvent == null)
{
waitEvent = tracer.WaitForLock(true, resourceType, resourceId);
}
WaitFor(existingLock, resourceType, resourceId, true, tries++);
}
heldLocks.put(resourceId, 1);
}
}
finally
{
if (waitEvent != null)
{
waitEvent.Close();
}
ClearWaitList();
_waitingForLock = null;
_stateHolder.decrementActiveClients();
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public void acquireShared(org.neo4j.storageengine.api.lock.LockTracer tracer, org.neo4j.storageengine.api.lock.ResourceType resourceType, long... resourceIds) throws org.neo4j.storageengine.api.lock.AcquireLockTimeoutException
public override void AcquireShared(LockTracer tracer, ResourceType resourceType, params long[] resourceIds)
{
_hasLocks = true;
_stateHolder.incrementActiveClients(this);
LockWaitEvent waitEvent = null;
try
{
// Grab the global lock map we will be using
ConcurrentMap <long, ForsetiLockManager.Lock> lockMap = _lockMaps[resourceType.TypeId()];
// And grab our local lock maps
MutableLongIntMap heldShareLocks = _sharedLockCounts[resourceType.TypeId()];
MutableLongIntMap heldExclusiveLocks = _exclusiveLockCounts[resourceType.TypeId()];
foreach (long resourceId in resourceIds)
{
// First, check if we already hold this as a shared lock
int heldCount = heldShareLocks.getIfAbsent(resourceId, -1);
if (heldCount != -1)
{
// We already have a lock on this, just increment our local reference counter.
heldShareLocks.put(resourceId, Math.incrementExact(heldCount));
continue;
}
// Second, check if we hold it as an exclusive lock
if (heldExclusiveLocks.containsKey(resourceId))
{
// We already have an exclusive lock, so just leave that in place.
// When the exclusive lock is released, it will be automatically downgraded to a shared lock,
// since we bumped the share lock reference count.
heldShareLocks.put(resourceId, 1);
continue;
}
// We don't hold the lock, so we need to grab it via the global lock map
int tries = 0;
SharedLock mySharedLock = null;
long waitStartMillis = _clock.millis();
// Retry loop
while (true)
{
AssertValid(waitStartMillis, resourceType, resourceId);
// Check if there is a lock for this entity in the map
ForsetiLockManager.Lock existingLock = lockMap.get(resourceId);
// No lock
if (existingLock == null)
{
// Try to create a new shared lock
if (mySharedLock == null)
{
mySharedLock = new SharedLock(this);
}
if (lockMap.putIfAbsent(resourceId, mySharedLock) == null)
{
// Success, we now hold the shared lock.
break;
}
else
{
continue;
}
}
// Someone holds shared lock on this entity, try and get in on that action
else if (existingLock is SharedLock)
{
if ((( SharedLock )existingLock).Acquire(this))
{
// Success!
break;
}
}
// Someone holds an exclusive lock on this entity
else if (existingLock is ExclusiveLock)
{
// We need to wait, just let the loop run.
}
else
{
throw new System.NotSupportedException("Unknown lock type: " + existingLock);
}
if (waitEvent == null)
{
waitEvent = tracer.WaitForLock(false, resourceType, resourceId);
}
// And take note of who we are waiting for. This is used for deadlock detection.
WaitFor(existingLock, resourceType, resourceId, false, tries++);
}
// Make a local note about the fact that we now hold this lock
heldShareLocks.put(resourceId, 1);
}
}
finally
{
if (waitEvent != null)
{
waitEvent.Close();
}
ClearWaitList();
_waitingForLock = null;
_stateHolder.decrementActiveClients();
}
}
