Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Data / System / Data / SqlClient / SqlConnectionFactory.cs / 1 / SqlConnectionFactory.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
// [....]
//-----------------------------------------------------------------------------
namespace System.Data.SqlClient
{
using System;
using System.Data.Common;
using System.Data.ProviderBase;
using System.Collections.Specialized;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using Microsoft.SqlServer.Server;
sealed internal class SqlConnectionFactory : DbConnectionFactory {
private SqlConnectionFactory() : base(SqlPerformanceCounters.SingletonInstance) {}
public static readonly SqlConnectionFactory SingletonInstance = new SqlConnectionFactory();
private const string _metaDataXml = "MetaDataXml";
override public DbProviderFactory ProviderFactory {
get {
return SqlClientFactory.Instance;
}
}
override protected DbConnectionInternal CreateConnection(DbConnectionOptions options, object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) {
SqlConnectionString opt = (SqlConnectionString)options;
SqlInternalConnection result = null;
if (opt.ContextConnection) {
result = GetContextConnection(opt, poolGroupProviderInfo, owningConnection);
}
else {
bool redirectedUserInstance = false;
DbConnectionPoolIdentity identity = null;
// Pass DbConnectionPoolIdentity to SqlInternalConnectionTds if using integrated security.
// Used by notifications.
if (opt.IntegratedSecurity) {
if (pool != null) {
identity = pool.Identity;
}
else {
identity = DbConnectionPoolIdentity.GetCurrent();
}
}
// FOLLOWING IF BLOCK IS ENTIRELY FOR SSE USER INSTANCES
// If "user instance=true" is in the connection string, we're using SSE user instances
if (opt.UserInstance) {
redirectedUserInstance = true;
string instanceName;
if ( (null == pool) ||
(null != pool && pool.Count <= 0) ) { // Non-pooled or pooled and no connections in the pool.
SqlInternalConnectionTds sseConnection = null;
try {
// What about a failure - throw? YES!
sseConnection = new SqlInternalConnectionTds(identity, opt, null, "", null, false);
instanceName = sseConnection.InstanceName;
if (!instanceName.StartsWith("\\\\.\\", StringComparison.Ordinal)) {
throw SQL.NonLocalSSEInstance();
}
if (null != pool) { // Pooled connection - cache result
SqlConnectionPoolProviderInfo providerInfo = (SqlConnectionPoolProviderInfo) pool.ProviderInfo;
// No lock since we are already in creation mutex
providerInfo.InstanceName = instanceName;
}
}
finally {
if (null != sseConnection) {
sseConnection.Dispose();
}
}
}
else { // Cached info from pool.
SqlConnectionPoolProviderInfo providerInfo = (SqlConnectionPoolProviderInfo) pool.ProviderInfo;
// No lock since we are already in creation mutex
instanceName = providerInfo.InstanceName;
}
// options immutable - stored in global hash - don't modify
opt = new SqlConnectionString(opt, false, instanceName);
poolGroupProviderInfo = null; // null so we do not pass to constructor below...
}
result = new SqlInternalConnectionTds(identity, opt, poolGroupProviderInfo, "", (SqlConnection)owningConnection, redirectedUserInstance);
}
return result;
}
protected override DbConnectionOptions CreateConnectionOptions(string connectionString, DbConnectionOptions previous) {
Debug.Assert(!ADP.IsEmpty(connectionString), "empty connectionString");
SqlConnectionString result = new SqlConnectionString(connectionString);
return result;
}
override internal DbConnectionPoolProviderInfo CreateConnectionPoolProviderInfo(DbConnectionOptions connectionOptions){
DbConnectionPoolProviderInfo providerInfo = null;
if (((SqlConnectionString) connectionOptions).UserInstance) {
providerInfo = new SqlConnectionPoolProviderInfo();
}
return providerInfo;
}
override protected DbConnectionPoolGroupOptions CreateConnectionPoolGroupOptions( DbConnectionOptions connectionOptions ) {
SqlConnectionString opt = (SqlConnectionString)connectionOptions;
DbConnectionPoolGroupOptions poolingOptions = null;
if (!opt.ContextConnection && opt.Pooling) { // never pool context connections.
int connectionTimeout = opt.ConnectTimeout;
if ((0 < connectionTimeout) && (connectionTimeout < Int32.MaxValue/1000))
connectionTimeout *= 1000;
else if (connectionTimeout >= Int32.MaxValue/1000)
connectionTimeout = Int32.MaxValue;
// NOTE: we use the deactivate queue because we may have to make
// a number of server round trips to unprepare statements.
poolingOptions = new DbConnectionPoolGroupOptions(
opt.IntegratedSecurity,
opt.MinPoolSize,
opt.MaxPoolSize,
connectionTimeout,
opt.LoadBalanceTimeout,
opt.Enlist,
false); // useDeactivateQueue
}
return poolingOptions;
}
override protected DbMetaDataFactory CreateMetaDataFactory(DbConnectionInternal internalConnection, out bool cacheMetaDataFactory){
Debug.Assert (internalConnection != null, "internalConnection may not be null.");
cacheMetaDataFactory = false;
if (internalConnection is SqlInternalConnectionSmi) {
throw SQL.NotAvailableOnContextConnection();
}
NameValueCollection settings = (NameValueCollection)PrivilegedConfigurationManager.GetSection("system.data.sqlclient");
Stream XMLStream =null;
if (settings != null){
string [] values = settings.GetValues(_metaDataXml);
if (values != null) {
XMLStream = ADP.GetXmlStreamFromValues(values, _metaDataXml);
}
}
// if the xml was not obtained from machine.config use the embedded XML resource
if (XMLStream == null){
XMLStream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("System.Data.SqlClient.SqlMetaData.xml");
cacheMetaDataFactory = true;
}
Debug.Assert (XMLStream != null,"XMLstream may not be null.");
return new SqlMetaDataFactory (XMLStream,
internalConnection.ServerVersion,
internalConnection.ServerVersion); //internalConnection.ServerVersionNormalized);
}
override internal DbConnectionPoolGroupProviderInfo CreateConnectionPoolGroupProviderInfo (DbConnectionOptions connectionOptions) {
return new SqlConnectionPoolGroupProviderInfo((SqlConnectionString)connectionOptions);
}
internal static SqlConnectionString FindSqlConnectionOptions(string connectionString) {
SqlConnectionString connectionOptions = (SqlConnectionString)SingletonInstance.FindConnectionOptions(connectionString);
if (null == connectionOptions) {
connectionOptions = new SqlConnectionString(connectionString);
}
if (connectionOptions.IsEmpty) {
throw ADP.NoConnectionString();
}
return connectionOptions;
}
private SqlInternalConnectionSmi GetContextConnection(SqlConnectionString options, object providerInfo, DbConnection owningConnection) {
SmiContext smiContext = SmiContextFactory.Instance.GetCurrentContext();
SqlInternalConnectionSmi result = (SqlInternalConnectionSmi)smiContext.GetContextValue((int)SmiContextFactory.ContextKey.Connection);
// context connections are automatically re-useable if they exist unless they've been doomed.
if (null == result || result.IsConnectionDoomed) {
if (null != result) {
result.Dispose(); // A doomed connection is a messy thing. Dispose of it promptly in nearest receptacle.
}
result = new SqlInternalConnectionSmi(options, smiContext);
smiContext.SetContextValue((int)SmiContextFactory.ContextKey.Connection, result);
}
result.Activate();
return result;
}
override internal DbConnectionPoolGroup GetConnectionPoolGroup(DbConnection connection) {
SqlConnection c = (connection as SqlConnection);
if (null != c) {
return c.PoolGroup;
}
return null;
}
override internal DbConnectionInternal GetInnerConnection(DbConnection connection) {
SqlConnection c = (connection as SqlConnection);
if (null != c) {
return c.InnerConnection;
}
return null;
}
override protected int GetObjectId(DbConnection connection) {
SqlConnection c = (connection as SqlConnection);
if (null != c) {
return c.ObjectID;
}
return 0;
}
override internal void PermissionDemand(DbConnection outerConnection) {
SqlConnection c = (outerConnection as SqlConnection);
if (null != c) {
c.PermissionDemand();
}
}
override internal void SetConnectionPoolGroup(DbConnection outerConnection, DbConnectionPoolGroup poolGroup) {
SqlConnection c = (outerConnection as SqlConnection);
if (null != c) {
c.PoolGroup = poolGroup;
}
}
override internal void SetInnerConnectionEvent(DbConnection owningObject, DbConnectionInternal to) {
SqlConnection c = (owningObject as SqlConnection);
if (null != c) {
c.SetInnerConnectionEvent(to);
}
}
override internal bool SetInnerConnectionFrom(DbConnection owningObject, DbConnectionInternal to, DbConnectionInternal from) {
SqlConnection c = (owningObject as SqlConnection);
if (null != c) {
return c.SetInnerConnectionFrom(to, from);
}
return false;
}
override internal void SetInnerConnectionTo(DbConnection owningObject, DbConnectionInternal to) {
SqlConnection c = (owningObject as SqlConnection);
if (null != c) {
c.SetInnerConnectionTo(to);
}
}
}
sealed internal class SqlPerformanceCounters : DbConnectionPoolCounters {
private const string CategoryName = ".NET Data Provider for SqlServer";
private const string CategoryHelp = "Counters for System.Data.SqlClient";
public static readonly SqlPerformanceCounters SingletonInstance = new SqlPerformanceCounters();
[System.Diagnostics.PerformanceCounterPermissionAttribute(System.Security.Permissions.SecurityAction.Assert, PermissionAccess=PerformanceCounterPermissionAccess.Write, MachineName=".", CategoryName=CategoryName)]
private SqlPerformanceCounters() : base (CategoryName, CategoryHelp) {
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
// [....]
//-----------------------------------------------------------------------------
namespace System.Data.SqlClient
{
using System;
using System.Data.Common;
using System.Data.ProviderBase;
using System.Collections.Specialized;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using Microsoft.SqlServer.Server;
sealed internal class SqlConnectionFactory : DbConnectionFactory {
private SqlConnectionFactory() : base(SqlPerformanceCounters.SingletonInstance) {}
public static readonly SqlConnectionFactory SingletonInstance = new SqlConnectionFactory();
private const string _metaDataXml = "MetaDataXml";
override public DbProviderFactory ProviderFactory {
get {
return SqlClientFactory.Instance;
}
}
override protected DbConnectionInternal CreateConnection(DbConnectionOptions options, object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) {
SqlConnectionString opt = (SqlConnectionString)options;
SqlInternalConnection result = null;
if (opt.ContextConnection) {
result = GetContextConnection(opt, poolGroupProviderInfo, owningConnection);
}
else {
bool redirectedUserInstance = false;
DbConnectionPoolIdentity identity = null;
// Pass DbConnectionPoolIdentity to SqlInternalConnectionTds if using integrated security.
// Used by notifications.
if (opt.IntegratedSecurity) {
if (pool != null) {
identity = pool.Identity;
}
else {
identity = DbConnectionPoolIdentity.GetCurrent();
}
}
// FOLLOWING IF BLOCK IS ENTIRELY FOR SSE USER INSTANCES
// If "user instance=true" is in the connection string, we're using SSE user instances
if (opt.UserInstance) {
redirectedUserInstance = true;
string instanceName;
if ( (null == pool) ||
(null != pool && pool.Count <= 0) ) { // Non-pooled or pooled and no connections in the pool.
SqlInternalConnectionTds sseConnection = null;
try {
// What about a failure - throw? YES!
sseConnection = new SqlInternalConnectionTds(identity, opt, null, "", null, false);
instanceName = sseConnection.InstanceName;
if (!instanceName.StartsWith("\\\\.\\", StringComparison.Ordinal)) {
throw SQL.NonLocalSSEInstance();
}
if (null != pool) { // Pooled connection - cache result
SqlConnectionPoolProviderInfo providerInfo = (SqlConnectionPoolProviderInfo) pool.ProviderInfo;
// No lock since we are already in creation mutex
providerInfo.InstanceName = instanceName;
}
}
finally {
if (null != sseConnection) {
sseConnection.Dispose();
}
}
}
else { // Cached info from pool.
SqlConnectionPoolProviderInfo providerInfo = (SqlConnectionPoolProviderInfo) pool.ProviderInfo;
// No lock since we are already in creation mutex
instanceName = providerInfo.InstanceName;
}
// options immutable - stored in global hash - don't modify
opt = new SqlConnectionString(opt, false, instanceName);
poolGroupProviderInfo = null; // null so we do not pass to constructor below...
}
result = new SqlInternalConnectionTds(identity, opt, poolGroupProviderInfo, "", (SqlConnection)owningConnection, redirectedUserInstance);
}
return result;
}
protected override DbConnectionOptions CreateConnectionOptions(string connectionString, DbConnectionOptions previous) {
Debug.Assert(!ADP.IsEmpty(connectionString), "empty connectionString");
SqlConnectionString result = new SqlConnectionString(connectionString);
return result;
}
override internal DbConnectionPoolProviderInfo CreateConnectionPoolProviderInfo(DbConnectionOptions connectionOptions){
DbConnectionPoolProviderInfo providerInfo = null;
if (((SqlConnectionString) connectionOptions).UserInstance) {
providerInfo = new SqlConnectionPoolProviderInfo();
}
return providerInfo;
}
override protected DbConnectionPoolGroupOptions CreateConnectionPoolGroupOptions( DbConnectionOptions connectionOptions ) {
SqlConnectionString opt = (SqlConnectionString)connectionOptions;
DbConnectionPoolGroupOptions poolingOptions = null;
if (!opt.ContextConnection && opt.Pooling) { // never pool context connections.
int connectionTimeout = opt.ConnectTimeout;
if ((0 < connectionTimeout) && (connectionTimeout < Int32.MaxValue/1000))
connectionTimeout *= 1000;
else if (connectionTimeout >= Int32.MaxValue/1000)
connectionTimeout = Int32.MaxValue;
// NOTE: we use the deactivate queue because we may have to make
// a number of server round trips to unprepare statements.
poolingOptions = new DbConnectionPoolGroupOptions(
opt.IntegratedSecurity,
opt.MinPoolSize,
opt.MaxPoolSize,
connectionTimeout,
opt.LoadBalanceTimeout,
opt.Enlist,
false); // useDeactivateQueue
}
return poolingOptions;
}
override protected DbMetaDataFactory CreateMetaDataFactory(DbConnectionInternal internalConnection, out bool cacheMetaDataFactory){
Debug.Assert (internalConnection != null, "internalConnection may not be null.");
cacheMetaDataFactory = false;
if (internalConnection is SqlInternalConnectionSmi) {
throw SQL.NotAvailableOnContextConnection();
}
NameValueCollection settings = (NameValueCollection)PrivilegedConfigurationManager.GetSection("system.data.sqlclient");
Stream XMLStream =null;
if (settings != null){
string [] values = settings.GetValues(_metaDataXml);
if (values != null) {
XMLStream = ADP.GetXmlStreamFromValues(values, _metaDataXml);
}
}
// if the xml was not obtained from machine.config use the embedded XML resource
if (XMLStream == null){
XMLStream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("System.Data.SqlClient.SqlMetaData.xml");
cacheMetaDataFactory = true;
}
Debug.Assert (XMLStream != null,"XMLstream may not be null.");
return new SqlMetaDataFactory (XMLStream,
internalConnection.ServerVersion,
internalConnection.ServerVersion); //internalConnection.ServerVersionNormalized);
}
override internal DbConnectionPoolGroupProviderInfo CreateConnectionPoolGroupProviderInfo (DbConnectionOptions connectionOptions) {
return new SqlConnectionPoolGroupProviderInfo((SqlConnectionString)connectionOptions);
}
internal static SqlConnectionString FindSqlConnectionOptions(string connectionString) {
SqlConnectionString connectionOptions = (SqlConnectionString)SingletonInstance.FindConnectionOptions(connectionString);
if (null == connectionOptions) {
connectionOptions = new SqlConnectionString(connectionString);
}
if (connectionOptions.IsEmpty) {
throw ADP.NoConnectionString();
}
return connectionOptions;
}
private SqlInternalConnectionSmi GetContextConnection(SqlConnectionString options, object providerInfo, DbConnection owningConnection) {
SmiContext smiContext = SmiContextFactory.Instance.GetCurrentContext();
SqlInternalConnectionSmi result = (SqlInternalConnectionSmi)smiContext.GetContextValue((int)SmiContextFactory.ContextKey.Connection);
// context connections are automatically re-useable if they exist unless they've been doomed.
if (null == result || result.IsConnectionDoomed) {
if (null != result) {
result.Dispose(); // A doomed connection is a messy thing. Dispose of it promptly in nearest receptacle.
}
result = new SqlInternalConnectionSmi(options, smiContext);
smiContext.SetContextValue((int)SmiContextFactory.ContextKey.Connection, result);
}
result.Activate();
return result;
}
override internal DbConnectionPoolGroup GetConnectionPoolGroup(DbConnection connection) {
SqlConnection c = (connection as SqlConnection);
if (null != c) {
return c.PoolGroup;
}
return null;
}
override internal DbConnectionInternal GetInnerConnection(DbConnection connection) {
SqlConnection c = (connection as SqlConnection);
if (null != c) {
return c.InnerConnection;
}
return null;
}
override protected int GetObjectId(DbConnection connection) {
SqlConnection c = (connection as SqlConnection);
if (null != c) {
return c.ObjectID;
}
return 0;
}
override internal void PermissionDemand(DbConnection outerConnection) {
SqlConnection c = (outerConnection as SqlConnection);
if (null != c) {
c.PermissionDemand();
}
}
override internal void SetConnectionPoolGroup(DbConnection outerConnection, DbConnectionPoolGroup poolGroup) {
SqlConnection c = (outerConnection as SqlConnection);
if (null != c) {
c.PoolGroup = poolGroup;
}
}
override internal void SetInnerConnectionEvent(DbConnection owningObject, DbConnectionInternal to) {
SqlConnection c = (owningObject as SqlConnection);
if (null != c) {
c.SetInnerConnectionEvent(to);
}
}
override internal bool SetInnerConnectionFrom(DbConnection owningObject, DbConnectionInternal to, DbConnectionInternal from) {
SqlConnection c = (owningObject as SqlConnection);
if (null != c) {
return c.SetInnerConnectionFrom(to, from);
}
return false;
}
override internal void SetInnerConnectionTo(DbConnection owningObject, DbConnectionInternal to) {
SqlConnection c = (owningObject as SqlConnection);
if (null != c) {
c.SetInnerConnectionTo(to);
}
}
}
sealed internal class SqlPerformanceCounters : DbConnectionPoolCounters {
private const string CategoryName = ".NET Data Provider for SqlServer";
private const string CategoryHelp = "Counters for System.Data.SqlClient";
public static readonly SqlPerformanceCounters SingletonInstance = new SqlPerformanceCounters();
[System.Diagnostics.PerformanceCounterPermissionAttribute(System.Security.Permissions.SecurityAction.Assert, PermissionAccess=PerformanceCounterPermissionAccess.Write, MachineName=".", CategoryName=CategoryName)]
private SqlPerformanceCounters() : base (CategoryName, CategoryHelp) {
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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