// constructors
/// <summary>
/// Initializes a new instance of the <see cref="MongoServerInstance"/> class.
/// </summary>
/// <param name="settings">The settings.</param>
/// <param name="address">The address.</param>
internal MongoServerInstance(MongoServerSettings settings, MongoServerAddress address)
{
_settings = settings;
_address = address;
_sequentialId = Interlocked.Increment(ref __nextSequentialId);
_state = MongoServerState.Disconnected;
_serverInfo = new ServerInformation
{
MaxDocumentSize = MongoDefaults.MaxDocumentSize,
MaxMessageLength = MongoDefaults.MaxMessageLength,
InstanceType = MongoServerInstanceType.Unknown
};
_connectionPool = new MongoConnectionPool(this);
_pingTimeAggregator = new PingTimeAggregator(5);
_permanentlyDisconnected = false;
// Console.WriteLine("MongoServerInstance[{0}]: {1}", sequentialId, address);
_stateVerificationAcquireConnectionOptions = new MongoConnectionPool.AcquireConnectionOptions
{
OkToAvoidWaitingByCreatingNewConnection = false,
OkToExceedMaxConnectionPoolSize = true,
OkToExceedWaitQueueSize = true,
WaitQueueTimeout = TimeSpan.FromSeconds(2)
};
}
// constructors
internal MongoConnection(MongoConnectionPool connectionPool)
{
_serverInstance = connectionPool.ServerInstance;
_connectionPool = connectionPool;
_generationId = connectionPool.GenerationId;
_createdAt = DateTime.UtcNow;
_state = MongoConnectionState.Initial;
}
// constructors
internal MongoConnection(MongoConnectionPool connectionPool)
{
this.serverInstance = connectionPool.ServerInstance;
this.connectionPool = connectionPool;
this.generationId = connectionPool.GenerationId;
this.createdAt = DateTime.UtcNow;
this.state = MongoConnectionState.Initial;
}
internal MongoConnection(
MongoConnectionPool connectionPool,
IPEndPoint endPoint
)
{
this.connectionPool = connectionPool;
this.endPoint = endPoint;
this.createdAt = DateTime.UtcNow;
this.state = MongoConnectionState.Initial;
}
private MongoServerState _state; // always use property to set value so event gets raised
// constructors
internal MongoServerInstance(MongoServer server, MongoServerAddress address)
{
_server = server;
_address = address;
_sequentialId = Interlocked.Increment(ref __nextSequentialId);
_maxDocumentSize = MongoDefaults.MaxDocumentSize;
_maxMessageLength = MongoDefaults.MaxMessageLength;
_state = MongoServerState.Disconnected;
_connectionPool = new MongoConnectionPool(this);
// Console.WriteLine("MongoServerInstance[{0}]: {1}", sequentialId, address);
}
// constructors
internal MongoServerInstance(MongoServer server, MongoServerAddress address)
{
this.server = server;
this.address = address;
this.sequentialId = Interlocked.Increment(ref nextSequentialId);
this.maxDocumentSize = MongoDefaults.MaxDocumentSize;
this.maxMessageLength = MongoDefaults.MaxMessageLength;
this.state = MongoServerState.Disconnected;
this.connectionPool = new MongoConnectionPool(this);
this.tags = new HashSet<string>();
// Console.WriteLine("MongoServerInstance[{0}]: {1}", sequentialId, address);
}
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="MongoServerInstance"/> class.
/// </summary>
/// <param name="settings">The settings.</param>
/// <param name="address">The address.</param>
internal MongoServerInstance(MongoServerSettings settings, MongoServerAddress address)
{
_settings = settings;
_address = address;
_sequentialId = Interlocked.Increment(ref __nextSequentialId);
_state = MongoServerState.Disconnected;
_serverInfo = new ServerInformation
{
MaxDocumentSize = MongoDefaults.MaxDocumentSize,
MaxMessageLength = MongoDefaults.MaxMessageLength,
InstanceType = MongoServerInstanceType.Unknown
};
_connectionPool = new MongoConnectionPool(this);
_pingTimeAggregator = new PingTimeAggregator(5);
_permanentlyDisconnected = false;
// Console.WriteLine("MongoServerInstance[{0}]: {1}", sequentialId, address);
}
// normally a connection is linked to a connection pool at the time it is created
// but the very first connection was made by FindServer before the connection pool existed
// we don't want to waste that connection so it becomes the first connection of the new connection pool
internal void JoinConnectionPool(
MongoConnectionPool connectionPool
)
{
if (state == MongoConnectionState.Closed)
{
throw new InvalidOperationException("Connection is closed");
}
if (this.connectionPool != null)
{
throw new ArgumentException("The connection is already in a connection pool", "this");
}
if (connectionPool.EndPoint != endPoint)
{
throw new ArgumentException("A connection can only join a connection pool with the same IP address", "connectionPool");
}
this.connectionPool = connectionPool;
this.lastUsedAt = DateTime.UtcNow;
}
internal void Disconnect() {
if (state != MongoServerState.Disconnected) {
try {
// if we fail during Connect the connectionPool field will still be null
if (connectionPool != null) {
connectionPool.Close();
connectionPool = null;
}
} finally {
State = MongoServerState.Disconnected;
}
}
}
internal void Connect(
bool slaveOk
) {
if (state != MongoServerState.Disconnected) {
var message = string.Format("MongoServerInstance.Connect can only be called when state is Disconnected, not when state is {0}.", state);
throw new InvalidOperationException(message);
}
State = MongoServerState.Connecting;
connectException = null;
try {
endPoint = address.ToIPEndPoint(server.Settings.AddressFamily);
var connectionPool = new MongoConnectionPool(this);
try {
var connection = connectionPool.AcquireConnection(null);
try {
try {
var isMasterCommand = new CommandDocument("ismaster", 1);
isMasterResult = connection.RunCommand("admin.$cmd", QueryFlags.SlaveOk, isMasterCommand);
} catch (MongoCommandException ex) {
isMasterResult = ex.CommandResult;
throw;
}
isPrimary = isMasterResult.Response["ismaster", false].ToBoolean();
isSecondary = isMasterResult.Response["secondary", false].ToBoolean();
isPassive = isMasterResult.Response["passive", false].ToBoolean();
isArbiter = isMasterResult.Response["arbiterOnly", false].ToBoolean();
if (!isPrimary && !slaveOk) {
throw new MongoConnectionException("Server is not a primary and SlaveOk is false.");
}
maxDocumentSize = isMasterResult.Response["maxBsonObjectSize", MongoDefaults.MaxDocumentSize].ToInt32();
maxMessageLength = Math.Max(MongoDefaults.MaxMessageLength, maxDocumentSize + 1024); // derived from maxDocumentSize
var buildInfoCommand = new CommandDocument("buildinfo", 1);
var buildInfoResult = connection.RunCommand("admin.$cmd", QueryFlags.SlaveOk, buildInfoCommand);
buildInfo = new MongoServerBuildInfo(
buildInfoResult.Response["bits"].ToInt32(), // bits
buildInfoResult.Response["gitVersion"].AsString, // gitVersion
buildInfoResult.Response["sysInfo"].AsString, // sysInfo
buildInfoResult.Response["version"].AsString // versionString
);
} finally {
connectionPool.ReleaseConnection(connection);
}
} catch {
connectionPool.Close();
throw;
}
State = MongoServerState.Connected;
this.connectionPool = connectionPool;
} catch (Exception ex) {
State = MongoServerState.Disconnected;
connectException = ex;
throw;
}
}
// constructors
/// <summary>
/// Initializes a new instance of the <see cref="MongoServerInstance"/> class.
/// </summary>
/// <param name="server">The server.</param>
/// <param name="address">The address.</param>
internal MongoServerInstance(MongoServer server, MongoServerAddress address)
{
_server = server;
_address = address;
_sequentialId = Interlocked.Increment(ref __nextSequentialId);
_maxDocumentSize = MongoDefaults.MaxDocumentSize;
_maxMessageLength = MongoDefaults.MaxMessageLength;
_state = MongoServerState.Disconnected;
_instanceType = MongoServerInstanceType.Unknown;
_connectionPool = new MongoConnectionPool(this);
_pingTimeAggregator = new PingTimeAggregator(5);
_stateVerificationTimer = new Timer(o => StateVerificationTimerCallback(), null, TimeSpan.Zero, TimeSpan.FromSeconds(10));
// Console.WriteLine("MongoServerInstance[{0}]: {1}", sequentialId, address);
}
// constructors
internal MongoConnection(MongoConnectionPool connectionPool)
: this(connectionPool.ServerInstance)
{
_connectionPool = connectionPool;
_generationId = connectionPool.GenerationId;
}
internal void Disconnect() {
if (state != MongoServerState.Disconnected) {
try {
connectionPool.Close();
connectionPool = null;
} finally {
State = MongoServerState.Disconnected;
}
}
}
internal void Connect(
bool slaveOk
) {
lock (serverInstanceLock) {
// note: don't check that state is Disconnected here
// when reconnecting to a replica set state can transition from Connected -> Connecting -> Connected
State = MongoServerState.Connecting;
connectException = null;
try {
endPoint = address.ToIPEndPoint(server.Settings.AddressFamily);
if (connectionPool == null) {
connectionPool = new MongoConnectionPool(this);
}
try {
var connection = connectionPool.AcquireConnection(null);
try {
try {
var isMasterCommand = new CommandDocument("ismaster", 1);
isMasterResult = connection.RunCommand("admin.$cmd", QueryFlags.SlaveOk, isMasterCommand);
} catch (MongoCommandException ex) {
isMasterResult = ex.CommandResult;
throw;
}
isPrimary = isMasterResult.Response["ismaster", false].ToBoolean();
isSecondary = isMasterResult.Response["secondary", false].ToBoolean();
isPassive = isMasterResult.Response["passive", false].ToBoolean();
isArbiter = isMasterResult.Response["arbiterOnly", false].ToBoolean();
// workaround for CSHARP-273
if (isPassive && isArbiter) { isPassive = false; }
if (!isPrimary && !slaveOk) {
throw new MongoConnectionException("Server is not a primary and SlaveOk is false.");
}
maxDocumentSize = isMasterResult.Response["maxBsonObjectSize", MongoDefaults.MaxDocumentSize].ToInt32();
maxMessageLength = Math.Max(MongoDefaults.MaxMessageLength, maxDocumentSize + 1024); // derived from maxDocumentSize
var buildInfoCommand = new CommandDocument("buildinfo", 1);
var buildInfoResult = connection.RunCommand("admin.$cmd", QueryFlags.SlaveOk, buildInfoCommand);
buildInfo = new MongoServerBuildInfo(
buildInfoResult.Response["bits"].ToInt32(), // bits
buildInfoResult.Response["gitVersion"].AsString, // gitVersion
buildInfoResult.Response["sysInfo"].AsString, // sysInfo
buildInfoResult.Response["version"].AsString // versionString
);
} finally {
connection.ConnectionPool.ReleaseConnection(connection);
}
} catch {
if (connectionPool != null) {
connectionPool.Close();
connectionPool = null;
}
throw;
}
// for the primary only immediately start creating connections to reach MinConnectionPoolSize
if (isPrimary) {
connectionPool.CreateInitialConnections(); // will be done on a background thread
}
State = MongoServerState.Connected;
} catch (Exception ex) {
State = MongoServerState.Disconnected;
connectException = ex;
throw;
}
}
}
