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ClusterFactory.cs
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ClusterFactory.cs
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/* Copyright 2013-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Linq;
using Microsoft.Extensions.Logging;
using MongoDB.Driver.Core.Configuration;
using MongoDB.Driver.Core.Events;
using MongoDB.Driver.Core.Logging;
using MongoDB.Driver.Core.Misc;
using MongoDB.Driver.Core.Servers;
namespace MongoDB.Driver.Core.Clusters
{
internal class ClusterFactory : IClusterFactory
{
// fields
private readonly IEventSubscriber _eventSubscriber;
private readonly ILoggerFactory _loggerFactory;
private readonly IClusterableServerFactory _serverFactory;
private readonly ClusterSettings _settings;
// constructors
public ClusterFactory(ClusterSettings settings, IClusterableServerFactory serverFactory, IEventSubscriber eventSubscriber, ILoggerFactory loggerFactory)
{
_settings = Ensure.IsNotNull(settings, nameof(settings));
_serverFactory = Ensure.IsNotNull(serverFactory, nameof(serverFactory));
_eventSubscriber = Ensure.IsNotNull(eventSubscriber, nameof(eventSubscriber));
_loggerFactory = loggerFactory;
}
// methods
public ICluster CreateCluster()
{
var settings = _settings;
ProcessClusterEnvironment(settings);
bool createLoadBalancedCluster = settings.LoadBalanced;
if (createLoadBalancedCluster)
{
return CreateLoadBalancedCluster(settings);
}
bool createSingleServerCluster;
#pragma warning disable CS0618 // Type or member is obsolete
if (settings.ConnectionModeSwitch == ConnectionModeSwitch.UseDirectConnection)
{
createSingleServerCluster = settings.DirectConnection.GetValueOrDefault();
}
else
{
var connectionMode = settings.ConnectionMode;
if (connectionMode == ClusterConnectionMode.Automatic)
{
if (settings.ReplicaSetName != null)
{
connectionMode = ClusterConnectionMode.ReplicaSet;
settings = settings.With(connectionMode: connectionMode, connectionModeSwitch: ConnectionModeSwitch.UseConnectionMode); // update connectionMode
}
}
createSingleServerCluster =
connectionMode == ClusterConnectionMode.Direct ||
connectionMode == ClusterConnectionMode.Standalone ||
(
connectionMode == ClusterConnectionMode.Automatic &&
settings.EndPoints.Count == 1 &&
settings.Scheme != ConnectionStringScheme.MongoDBPlusSrv
);
}
#pragma warning restore CS0618 // Type or member is obsolete
if (createSingleServerCluster)
{
return CreateSingleServerCluster(settings);
}
else
{
return CreateMultiServerCluster(settings);
}
}
private MultiServerCluster CreateMultiServerCluster(ClusterSettings settings)
{
return new MultiServerCluster(settings, _serverFactory, _eventSubscriber, _loggerFactory);
}
private SingleServerCluster CreateSingleServerCluster(ClusterSettings settings)
{
return new SingleServerCluster(settings, _serverFactory, _eventSubscriber, _loggerFactory);
}
private LoadBalancedCluster CreateLoadBalancedCluster(ClusterSettings setting)
{
return new LoadBalancedCluster(setting, _serverFactory, _eventSubscriber, _loggerFactory);
}
private void ProcessClusterEnvironment(ClusterSettings settings)
{
if (_loggerFactory == null)
{
return;
}
foreach (var (host, _) in settings.EndPoints.Select(EndPointHelper.GetHostAndPort))
{
if (LogIfCosmosDB(host) || LogIfDocumentDB(host))
{
return;
}
}
bool LogIfCosmosDB(string host) =>
LogIfExternalEnvironment(host, "CosmosDB", "https://www.mongodb.com/supportability/cosmosdb", ".cosmos.azure.com");
bool LogIfDocumentDB(string host) =>
LogIfExternalEnvironment(host, "DocumentDB", "https://www.mongodb.com/supportability/documentdb", ".docdb.amazonaws.com", ".docdb-elastic.amazonaws.com");
bool LogIfExternalEnvironment(string host, string environment, string documentationUrl, params string[] suffixes)
{
if (suffixes.Any(s => host.EndsWith(s, StringComparison.InvariantCultureIgnoreCase)))
{
var logger = _loggerFactory.CreateLogger<LogCategories.Client>();
logger?.LogInformation("You appear to be connected to a {environment} cluster. For more information regarding feature compatibility and support please visit {url}", environment, documentationUrl);
return true;
}
return false;
}
}
}
}