transactions

问题 I am working on a Hibernate project.I had used Hibernate 4.3.1 libraries of Netbeans. Then I needed to use Apache Lucene for fulltext searching. To be able to use Lucene I needed to switch to Hibernate 5.x jars.I can define a new Transaction object but wasRollecBack method of Transaction class is not working. I used this method in several places and now I'm stuck. When I look at javadoc of Hibernate 5.0.6 there is nothing like org.hibernate.transaction . There is org.hibernate.engine

问题 I want to process something after commit on spring batch . And I tried this example (https://dzone.com/articles/transaction-synchronization-and-spring-application). That example works perfectly on springboot like this flow. 1. some update query and event publish by ApplicationEventPublisher 2. some update query and event publish by ApplicationEventPublisher 3. some update query and event publish by ApplicationEventPublisher 4. commit 5. after commit logic I maked 6. after commit logic I maked

问题 Got some bunch of code: Session session = sessionFactory.openSession(); Transaction tx = session.getTransaction(); try { tx.begin(); Person person = Person.builder().name("JAN").surname("NOWAK").age(30).build(); session.save(person); tx.commit(); } While debugging i see that person is reflected in data base before transaction commit. I set explicitly <property name="hibernate.connection.autocommit">false</property> and tried with various hibernate versions but still get the issue. Even if i

问题 Got some bunch of code: Session session = sessionFactory.openSession(); Transaction tx = session.getTransaction(); try { tx.begin(); Person person = Person.builder().name("JAN").surname("NOWAK").age(30).build(); session.save(person); tx.commit(); } While debugging i see that person is reflected in data base before transaction commit. I set explicitly <property name="hibernate.connection.autocommit">false</property> and tried with various hibernate versions but still get the issue. Even if i

问题 Does anybody know the PayPal transactions types (from API point of view) for which PayPal does not provide details when using GetTransactionDetails API? The official documentation is very frugal regarding this topic: " You cannot obtain details of bank transfer withdrawals, for example." Thank you. 回答1: I would assume anything that doesn't pertain to the API itself can't be retrieved via API. You can't start a bank transfer via the API so it would make sense that you can't get the details

问题 Does anybody know the PayPal transactions types (from API point of view) for which PayPal does not provide details when using GetTransactionDetails API? The official documentation is very frugal regarding this topic: " You cannot obtain details of bank transfer withdrawals, for example." Thank you. 回答1: I would assume anything that doesn't pertain to the API itself can't be retrieved via API. You can't start a bank transfer via the API so it would make sense that you can't get the details

问题 After some googling I have found: Note from mysql docs: MySQL Cluster automatically shards (partitions) tables across nodes, enabling databases to scale horizontally on low cost, commodity hardware to serve read and write-intensive workloads, accessed both from SQL and directly via NoSQL APIs. Can relational database be horizontal scaling? Will it be somehow based on NoSQL database? Do someone have any real world example? How can I manage sql requests, transactions, and so on in such database

问题 I have very simple table: CREATE TABLE `d` ( `id` int(11) DEFAULT NULL, UNIQUE KEY `id` (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 without records: select * from d; Empty set (0,01 sec) Then I try to open two transactions in different sessions: Session #1: begin; Query OK, 0 rows affected (0,00 sec) select * from d where id = 100 for update; Empty set (0,00 sec) Session #2: begin; Query OK, 0 rows affected (0,00 sec) select * from d where id = 700 for update; Empty set (0,00 sec) Now I try

问题 In my (greatly simplified) model I have users, accounts and account_types. Each user can have multiple accounts of each account_type. When an account of type TT is created I'm updating the "users" field of that object so it keeps the users which have accounts of that types, and the number of such accounts they have. users: { some fields }, accounts: { userID: UU, type: TT }, account_type: users: { UU: 31 } } I use the onCreate and onDelete cloud triggers for accounts to update the account

问题 In my (greatly simplified) model I have users, accounts and account_types. Each user can have multiple accounts of each account_type. When an account of type TT is created I'm updating the "users" field of that object so it keeps the users which have accounts of that types, and the number of such accounts they have. users: { some fields }, accounts: { userID: UU, type: TT }, account_type: users: { UU: 31 } } I use the onCreate and onDelete cloud triggers for accounts to update the account