public GraphClientFactory(NeoServerConfiguration configuration)
{
if (configuration == null)
throw new ArgumentNullException("configuration", "Neo server configuration is null");
_configuration = configuration;
}
public GraphClientFactory(NeoServerConfiguration configuration)
{
if (configuration == null)
{
throw new ArgumentNullException("configuration", "Neo server configuration is null");
}
_configuration = configuration;
}
/// <inheritdoc cref="IGraphClient.ConnectAsync"/>
public async Task ConnectAsync(NeoServerConfiguration configuration = null)
{
if (Driver == null)
{
var driver = configuration == null
? new DriverWrapper(uri, addressResolver, username, password, realm, encryptionLevel)
: new DriverWrapper(uri, addressResolver, configuration.Username, configuration.Password, configuration.Realm, configuration.EncryptionLevel);
Driver = driver;
}
var session = Driver.AsyncSession(x => x.WithDefaultAccessMode(AccessMode.Read));
var serverInformation = await session.RunAsync("CALL dbms.components()").ConfigureAwait(false);
foreach (var record in await serverInformation.ToListAsync().ConfigureAwait(false))
{
var name = record["name"].As <string>();
if (name.ToLowerInvariant() != "neo4j kernel")
{
continue;
}
var version = record["versions"].As <List <object> >();
ServerVersion = RootApiResponse.GetVersion(version?.First()?.ToString());
if (ServerVersion >= new Version(3, 0))
{
CypherCapabilities = CypherCapabilities.Cypher30;
}
if (ServerVersion >= new Version(4, 0))
{
CypherCapabilities = CypherCapabilities.Cypher40;
}
if (ServerVersion >= new Version(4, 4))
{
CypherCapabilities = CypherCapabilities.Cypher44;
}
}
await session.CloseAsync().ConfigureAwait(false);
IsConnected = true;
}
/// <inheritdoc />
public Task ConnectAsync(NeoServerConfiguration configuration = null)
{
if (Driver == null)
{
var driver = configuration == null
? new DriverWrapper(uri, username, password, realm)
: new DriverWrapper(uri, configuration.Username, configuration.Password, configuration.Realm);
Driver = driver;
}
using (var session = Driver.Session(AccessMode.Read))
{
var serverInformation = session.Run("CALL dbms.components()");
foreach (var record in serverInformation)
{
var name = record["name"].As <string>();
if (name.ToLowerInvariant() != "neo4j kernel")
{
continue;
}
var version = record["versions"].As <List <object> >();
ServerVersion = RootApiResponse.GetVersion(version?.First()?.ToString());
if (ServerVersion > new Version(3, 0))
{
CypherCapabilities = CypherCapabilities.Cypher30;
}
}
}
IsConnected = true;
#if NET45
return(Task.FromResult(0));
#else
return(Task.CompletedTask);
#endif
}
public virtual async Task ConnectAsync(NeoServerConfiguration configuration = null)
{
if (IsConnected)
{
return;
}
var stopwatch = Stopwatch.StartNew();
var operationCompletedArgs = new OperationCompletedEventArgs
{
QueryText = "Connect",
ResourcesReturned = 0
};
Action stopTimerAndNotifyCompleted = () =>
{
stopwatch.Stop();
operationCompletedArgs.TimeTaken = stopwatch.Elapsed;
OnOperationCompleted(operationCompletedArgs);
};
try
{
configuration = configuration ?? await NeoServerConfiguration.GetConfigurationAsync(
RootUri,
ExecutionConfiguration.Username,
ExecutionConfiguration.Password,
ExecutionConfiguration.Realm,
ExecutionConfiguration).ConfigureAwait(false);
RootApiResponse = configuration.ApiConfig;
if (!string.IsNullOrWhiteSpace(RootApiResponse.Transaction))
{
// transactionManager = new TransactionManager(this);
}
rootNode = string.IsNullOrEmpty(RootApiResponse.ReferenceNode)
? null
: new RootNode(long.Parse(GetLastPathSegment(RootApiResponse.ReferenceNode)), this);
// http://blog.neo4j.org/2012/04/streaming-rest-api-interview-with.html
ExecutionConfiguration.UseJsonStreaming = ExecutionConfiguration.UseJsonStreaming &&
RootApiResponse.Version >= new Version(1, 8);
if (RootApiResponse.Version < new Version(2, 0))
{
cypherCapabilities = CypherCapabilities.Cypher19;
}
if (RootApiResponse.Version >= new Version(2, 2))
{
cypherCapabilities = CypherCapabilities.Cypher22;
}
if (RootApiResponse.Version >= new Version(2, 2, 6))
{
cypherCapabilities = CypherCapabilities.Cypher226;
}
if (RootApiResponse.Version >= new Version(2, 3))
{
cypherCapabilities = CypherCapabilities.Cypher23;
}
if (RootApiResponse.Version >= new Version(3, 0))
{
cypherCapabilities = CypherCapabilities.Cypher30;
}
}
catch (AggregateException ex)
{
Exception unwrappedException;
var wasUnwrapped = ex.TryUnwrap(out unwrappedException);
operationCompletedArgs.Exception = wasUnwrapped ? unwrappedException : ex;
stopTimerAndNotifyCompleted();
if (wasUnwrapped)
{
throw unwrappedException;
}
throw;
}
catch (Exception e)
{
operationCompletedArgs.Exception = e;
stopTimerAndNotifyCompleted();
throw;
}
stopTimerAndNotifyCompleted();
}
/// <inheritdoc />
public void Connect(NeoServerConfiguration configuration = null)
{
var connectTask = ConnectAsync(configuration);
connectTask.Wait();
}
public virtual async Task ConnectAsync(NeoServerConfiguration configuration = null)
{
if (IsConnected)
{
return;
}
var stopwatch = Stopwatch.StartNew();
var operationCompletedArgs = new OperationCompletedEventArgs
{
QueryText = "Connect",
ResourcesReturned = 0
};
Action stopTimerAndNotifyCompleted = () =>
{
stopwatch.Stop();
operationCompletedArgs.TimeTaken = stopwatch.Elapsed;
OnOperationCompleted(operationCompletedArgs);
};
try
{
configuration = configuration ?? await NeoServerConfiguration.GetConfigurationAsync(
RootUri,
ExecutionConfiguration.Username,
ExecutionConfiguration.Password,
ExecutionConfiguration).ConfigureAwait(false);
RootApiResponse = configuration.ApiConfig;
if (!string.IsNullOrWhiteSpace(RootApiResponse.Transaction))
{
// transactionManager = new TransactionManager(this);
}
rootNode = string.IsNullOrEmpty(RootApiResponse.ReferenceNode)
? null
: new RootNode(long.Parse(GetLastPathSegment(RootApiResponse.ReferenceNode)), this);
// http://blog.neo4j.org/2012/04/streaming-rest-api-interview-with.html
ExecutionConfiguration.UseJsonStreaming = ExecutionConfiguration.UseJsonStreaming &&
RootApiResponse.Version >= new Version(1, 8);
if (RootApiResponse.Version < new Version(2, 0))
cypherCapabilities = CypherCapabilities.Cypher19;
if (RootApiResponse.Version >= new Version(2, 2))
cypherCapabilities = CypherCapabilities.Cypher22;
if (RootApiResponse.Version >= new Version(2, 2, 6))
cypherCapabilities = CypherCapabilities.Cypher226;
if (RootApiResponse.Version >= new Version(2, 3))
cypherCapabilities = CypherCapabilities.Cypher23;
if (RootApiResponse.Version >= new Version(3, 0))
cypherCapabilities = CypherCapabilities.Cypher30;
}
catch (AggregateException ex)
{
Exception unwrappedException;
var wasUnwrapped = ex.TryUnwrap(out unwrappedException);
operationCompletedArgs.Exception = wasUnwrapped ? unwrappedException : ex;
stopTimerAndNotifyCompleted();
if (wasUnwrapped)
throw unwrappedException;
throw;
}
catch (Exception e)
{
operationCompletedArgs.Exception = e;
stopTimerAndNotifyCompleted();
throw;
}
stopTimerAndNotifyCompleted();
}
public virtual async Task ConnectAsync(NeoServerConfiguration configuration = null)
{
if (IsConnected)
{
return;
}
var stopwatch = Stopwatch.StartNew();
var operationCompletedArgs = new OperationCompletedEventArgs
{
QueryText = "Connect",
ResourcesReturned = 0
};
void StopTimerAndNotifyCompleted()
{
stopwatch.Stop();
operationCompletedArgs.TimeTaken = stopwatch.Elapsed;
OnOperationCompleted(operationCompletedArgs);
}
try
{
configuration = configuration ?? await NeoServerConfiguration.GetConfigurationAsync(
RootUri,
ExecutionConfiguration.Username,
ExecutionConfiguration.Password,
ExecutionConfiguration.Realm,
ExecutionConfiguration.EncryptionLevel,
ExecutionConfiguration).ConfigureAwait(false);
RootApiResponse = configuration.ApiConfig;
if (!string.IsNullOrWhiteSpace(RootApiResponse.Transaction))
{
transactionManager = new TransactionManager(this);
}
// http://blog.neo4j.org/2012/04/streaming-rest-api-interview-with.html
ExecutionConfiguration.UseJsonStreaming = ExecutionConfiguration.UseJsonStreaming &&
RootApiResponse.Version >= new Version(1, 8);
var version = RootApiResponse.Version;
if (version < new Version(2, 0))
{
CypherCapabilities = CypherCapabilities.Cypher19;
}
if (version >= new Version(2, 2))
{
CypherCapabilities = CypherCapabilities.Cypher22;
}
if (version >= new Version(2, 2, 6))
{
CypherCapabilities = CypherCapabilities.Cypher226;
}
if (version >= new Version(2, 3))
{
CypherCapabilities = CypherCapabilities.Cypher23;
}
if (version >= new Version(3, 0))
{
CypherCapabilities = CypherCapabilities.Cypher30;
}
if (version >= new Version(4, 0))
{
CypherCapabilities = CypherCapabilities.Cypher40;
}
if (ServerVersion >= new Version(4, 4))
{
CypherCapabilities = CypherCapabilities.Cypher44;
}
}
catch (AggregateException ex)
{
var wasUnwrapped = ex.TryUnwrap(out var unwrappedException);
operationCompletedArgs.Exception = wasUnwrapped ? unwrappedException : ex;
StopTimerAndNotifyCompleted();
if (wasUnwrapped)
{
throw unwrappedException;
}
throw;
}
catch (Exception e)
{
operationCompletedArgs.Exception = e;
StopTimerAndNotifyCompleted();
throw;
}
StopTimerAndNotifyCompleted();
}
