transactions

问题 Does anyone have a good tutorial or some advice on how to implement one's own XAResource? I need Spring's MailSender to be transactional, so that the mail will only be sent once the transaction commits, and it seems there isn't any existing transactional wrapper. 回答1: If you just need to wait for the commit, as you say in a comment, you can investigate using TransactionSynchronizationManager.registerSynchronization() to trigger email sending on commit. 回答2: You can use a

问题 I am working with wso2dss3.0.1 and wso2esb4.8.0.I wish to work with Transactions for that i enabled box_carying in wso2dss and its working fine.Means i wish insert the data into 2 tables if 2nd table failed my first table also need to rollback.This functionality working in wso2dss.While i am calling same service using wso2esb that time transaction rollback is not working box_carying is not working fine my configuration is like this <?xml version="1.0" encoding="UTF-8"?> <proxy xmlns="http:/

问题 I have a code like below public abstract class AffltTransactionService implements IAffltTransactionService { .... @Override @Transactional public void processTransactions(List<? extends AffltTransaction> transactions) { for (AffltTransaction transaction : transactions) { if (transaction != null) { processTransaction(transaction); } } } private void processTransaction(AffltTransaction transaction) { try { processTransactionInternal(transaction); } catch (Exception exception) {

问题 I am trying to learn NoSQL with Google Datastore but I am running into a problem with uniqueness. Consider an ecommerce store, it has categories and products. You do not want two products of the same SKU in the database. So I insert an entity with JSON: {"sku": 1234, "product_name": "Test product"} And it shows up with two fields. But then I can do that again and I have two or more identical products. How do you avoid this? Can you make the sku field unique? Do I need to do a query before

问题 static void clean() throws Exception { final UserTransaction tx = InitialContext.doLookup("UserTransaction"); tx.begin(); try { final DataSource ds = InitialContext.doLookup(Databases.ADMIN); Connection connection1 = ds.getConnection(); Connection connection2 = ds.getConnection(); PreparedStatement st1 = connection1.prepareStatement("XXX delete records XXX"); // delete data PreparedStatement st2 = connection2.prepareStatement("XXX insert records XXX"); // insert new data that is same primary

问题 Is there a limit to the amount of inserts you can do within an Access transaction before you need to commit or before Access/Jet throws an error? I'm currently running the following code in hopes to determine what this maximum is. OleDbConnection cn = new OleDbConnection( @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\temp\myAccessFile.accdb;Persist Security Info=False;"); try { cn.Open(); oleCommand = new OleDbCommand("BEGIN TRANSACTION", cn); oleCommand.ExecuteNonQuery(); oleCommand

问题 How can I use classes from System.Transactions namespace to achieve similar effect as I can get when using SqlTransaction.Save(savePoint) and SqlTransaction.Rollback(savePoint). The effect of using these two methods is ability to create named save point in the running transaction and in case of issue rollback only to the save point (operations created before save point are not rolled back). 回答1: Save Points are database specific in part of their implementation. Oracle implements them, and

问题 I have a table like the following: transaction_id user_id other_user_id trans_type amount This table is used to maintain the account transactions for a finance type app. Its double entry accounting so a transfer from User A to B would insert two rows into the table looking like. 1, A, B, Sent, -100 1, B, A, Received, 100 The balance on any account is calculated by summing up the transactions for that account. For example: select sum(amount) from transactions where user_id=A What is the best

问题 MongoDB 4.0 are going to introduce transactions support with ACID guarantees. Does Spring Data MongoDB already supports the transactions in MongoDB and if no, when this awesome feature will be available. I really need it, taking into account the following issue - MongoDB schema design in order to support application horizontal scaling 回答1: Does Spring Data MongoDB already supports the transactions in MongoDB Spring Data Lovelace M3 (2.1.0.M3) supports synchronous transaction for MongoDB v4.0,

问题 I'm trying to get a Spring MVC Controller method which has been annotated with @Transactional to rollback if the network cable in pulled on the client before the method returns, I just can't seem to get it to work, here is an example of what I'm trying to achieve. @Transactional(rollbackFor = IOException.class) @RequestMapping(value = "/test") public @ResponseBody Integer testMethod(HttpServletResponse response) throws Exception { LOG.debug("Put breakpoint here, and pull network cable on