//准备转账
private TransactionDocument PrepareTransfer(double amt, string source, string destination)
{
string strGUID = System.Guid.NewGuid().ToString("N"); //类似e0a953c3ee6040eaa9fae2b667060e09
//创建事务文档
TransactionDocument tDoc = new TransactionDocument
{
_id = strGUID, //这个应该是随机生成的一个串
State = "new",
Ts = DateTime.Now,
Amt = amt,
Src = source,
Dst = destination
};
//将事务文档插入事务集合
bool isSu = mongoDBService.Insert(TransactionCollectionName, tDoc);
if (!isSu)
{
throw new Exception("构建事务文档失败！");
}
FilterDefinitionBuilder <Account> filterBuilder = Builders <Account> .Filter;
//更新source账户
FilterDefinition <Account> filterS = filterBuilder.Eq(m => m._id, source) & filterBuilder.Gte(m => m.Balance, amt);
UpdateDefinition <Account> updateS = Builders <Account> .Update.Push(m => m.Txns, tDoc._id).Inc(m => m.Balance, -amt);
UpdateResult updateResult = mongoDBService.DocumentUpdate(AccountsCollectionName, filterS, updateS);
//检测更新是否成功
bool isSuccess = updateResult.ModifiedCount > 0 && updateResult.ModifiedCount == updateResult.MatchedCount?
true:false;
if (!isSuccess)
{
mongoDBService.Delete <TransactionDocument>(TransactionCollectionName, m => m._id == tDoc._id);
throw new Exception("更新source账户失败");
}
//更新destination账户
FilterDefinition <Account> filterD = filterBuilder.Eq(m => m._id, destination);
var updateD = Builders <Account> .Update.Push(m => m.Txns, tDoc._id).Inc(m => m.Balance, amt);
UpdateResult updateResultD = mongoDBService.DocumentUpdate(AccountsCollectionName, filterD, updateD);
bool isSuccessD = updateResultD.ModifiedCount > 0 && updateResultD.ModifiedCount == updateResultD.MatchedCount ?
true : false;
if (!isSuccessD)
{
throw new Exception("更新destination账户失败");
}
return(tDoc);
}
/// <summary>
/// 插入文档
/// </summary>
public void Insert()
{
//Model2 model = new Model2
//{
// Id = Guid.NewGuid().ToString("N"),
// Field2A = "2",
// Field2B = DateTime.Now.Date,
// Field2C = new List<Model1>()
//};
//for (int i = 0; i < 3; i++)
//{
// Model1 model1 = new Model1
// {
// Field1A = "Welcome to the MongoDB",
// Field1B = i,
// Field1C = 3.1415926,
// Field1D = 3.1415926F,
// Field1E = new List<string> { "asd","dsa","sad"}
// };
// model.Field2C.Add(model1);
//}
Model1 model1 = new Model1
{
Field1A = "Welcome to the MongoDB",
Field1B = 0,
Field1C = 3.1415926,
Field1D = 3.1415926F,
Field1E = new List <string> {
"asd", "dsa", "sad"
}
};
//插入一个collection
bool t = mongoDBService.Insert(collectionName, model1);
}
private static void CreateAccount()
{
AccountP accA = new AccountP
{
_id = "A001",
Balance = 2010,
PendingTransactions = new List <string>()
};
AccountP accB = new AccountP
{
_id = "B001",
Balance = 2010,
PendingTransactions = new List <string>()
};
mongoDBService.Insert(AccountsCollectionName, accA);
mongoDBService.Insert(AccountsCollectionName, accB);
}
//创建事务文档
private void PrepareTransfer(decimal value, string source, string destination)
{
//创建事务文档
TransactionDocumentP tDoc = new TransactionDocumentP
{
_id = string.Format("{0}For{1}", source, destination),
State = "initial",
LastModified = DateTime.Now,
Value = value,
Source = source,
Destination = destination
};
FilterDefinitionBuilder <TransactionDocumentP> filterBuilder = Builders <TransactionDocumentP> .Filter;
FilterDefinition <TransactionDocumentP> filter1 = filterBuilder.Eq(doc => doc._id, tDoc._id);
if (mongoDBService.ExistDocument(TransactionCollectionName, filter1))
{
return;
}
//将事务文档插入事务集合
mongoDBService.Insert(TransactionCollectionName, tDoc);
}