mongoTemplate.findOne 执行流程

org.springframework.data.mongodb.core.MongoTemplate#findOne(org.springframework.data.mongodb.core.query.Query, java.lang.Class<T>)
org.springframework.data.mongodb.core.MongoTemplate#findOne(org.springframework.data.mongodb.core.query.Query, java.lang.Class<T>, java.lang.String)
org.springframework.data.mongodb.core.MongoTemplate#doFindOne(java.lang.String, org.bson.Document, org.bson.Document, org.springframework.data.mongodb.core.CursorPreparer, java.lang.Class<T>)
org.springframework.data.mongodb.core.MongoTemplate#executeFindOneInternal
org.springframework.data.mongodb.core.MongoTemplate.FindOneCallback#doInCollection
com.mongodb.client.internal.FindIterableImpl#first
com.mongodb.client.internal.MongoClientDelegate.DelegateOperationExecutor#execute(com.mongodb.internal.operation.ReadOperation<T>, com.mongodb.ReadPreference, com.mongodb.ReadConcern, com.mongodb.client.ClientSession)
com.mongodb.internal.operation.FindOperation#execute
com.mongodb.internal.operation.CommandOperationHelper#createReadCommandAndExecute
com.mongodb.internal.connection.DefaultServerConnection#command(java.lang.String, org.bson.BsonDocument, org.bson.FieldNameValidator, com.mongodb.ReadPreference, org.bson.codecs.Decoder<T>, com.mongodb.internal.session.SessionContext, com.mongodb.ServerApi, com.mongodb.RequestContext)
com.mongodb.internal.connection.DefaultServerConnection#command(java.lang.String, org.bson.BsonDocument, org.bson.FieldNameValidator, com.mongodb.ReadPreference, org.bson.codecs.Decoder<T>, com.mongodb.internal.session.SessionContext, com.mongodb.ServerApi, com.mongodb.RequestContext, boolean, com.mongodb.internal.connection.SplittablePayload, org.bson.FieldNameValidator)
com.mongodb.internal.connection.DefaultServerConnection#executeProtocol(com.mongodb.internal.connection.CommandProtocol<T>, com.mongodb.internal.session.SessionContext)
com.mongodb.internal.connection.DefaultServer.DefaultServerProtocolExecutor#execute(com.mongodb.internal.connection.CommandProtocol<T>, com.mongodb.internal.connection.InternalConnection, com.mongodb.internal.session.SessionContext)
com.mongodb.internal.connection.CommandProtocolImpl#execute
com.mongodb.internal.connection.DefaultConnectionPool.PooledConnection#sendAndReceive
com.mongodb.internal.connection.UsageTrackingInternalConnection#sendAndReceive