transactions

问题 I use following declarative Spring transaction: <!-- Declare a transaction manager--> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" p:sessionFactory-ref="sessionFactory" /> <!-- enable the configuration of transactional behavior based on annotations --> <tx:annotation-driven transaction-manager="transactionManager" mode="proxy" proxy-target-class="true"/> Here is the DAO: @Repository @Transactional(readOnly = true, propagation=Propagation

问题 I need to download file from folder /uploads, but I just get timeOut error when the action is called, Anyone can help me :( public function actionDownload() { $path = Yii::getAlias('@webroot') . '/uploads'; $file = $path . '/1.pdf'; if (file_exists($file)) { Yii::$app->response->sendFile($file); } } 回答1: If a download takes too much time, I see 2 possibilities You can increase the max execution time of your script. That's not the best solution as the script will still time out for too big

问题 I want to know what isolation level is set for current Mysql database. How can find it out? I tried searching it on the google but did not find it. 回答1: There are potentially six different transaction isolation level values in MySQL/MariaDB - and they could have different values. They are: Value defined in the configuration file(s). Value used in the command line option used to start mysqld . The global transaction isolation level. The session transaction isolation level. The level that will

问题 I am trying to apply Trasnactions ( beginTransaction , rollback and commit . however if the query of adding invoice (Frst Query) executed successfully I want to update the supplier amount (Second Query). I intended to write wrong syntax in the second query by changing UPDATE to UPDATEEE . I assumed this should rollback . I got query syntax error message but the invoice added (first query successfully executed). What is the wrong thing i am doing? Invoice.addNewInvoice = function (invoice_data

问题 How to support transaction in Loopback4? Is there a decorator for the same, something like @Transaction? I looked into the documentation here https://loopback.io/doc/en/lb4/Repositories.html but nothing is mentioned about the transaction. 回答1: LoopBack 4 does not support transactions out of the box. Please open a new GitHub issue to discuss how to implement this feature: https://github.com/strongloop/loopback-next/issues/new 回答2: LoopBack 4 now supports database transactions for quite a while

问题 I am new to MongoDB as I was a SuperFan of MySQL before. I recently moved to this NoSQL thing and loved it but now I am badly trapped at Transactions in MongoDB . I found some related questions on SO but with no answers or obsolete which does not work with new MongoDB PHP Driver as there are many changes in syntax/functions and I could see many newbie like me are confused between MongoDB Docs and PHP Driver. I found this way of committing transactions in MongoDB Docs $client = new MongoDB

问题 I am new to MongoDB as I was a SuperFan of MySQL before. I recently moved to this NoSQL thing and loved it but now I am badly trapped at Transactions in MongoDB . I found some related questions on SO but with no answers or obsolete which does not work with new MongoDB PHP Driver as there are many changes in syntax/functions and I could see many newbie like me are confused between MongoDB Docs and PHP Driver. I found this way of committing transactions in MongoDB Docs $client = new MongoDB

问题 My program needs to add data to two lists in Redis as a transaction. Data should be consistent in both lists. If there is an exception or system failure and thus program only added data to one list, system should be able to recover and rollback. But based on Redis doc, it doesn't support rollback. How can I implement this? The language I use is Java. 回答1: If you need transaction rollback, I recommend using something other than Redis. Redis transactions are not the same as for other datastores

问题 I'm trying to run a transaction with a variable number of read operations. I put the read () operations before than update (). Reading the Firestore doc on https://cloud.google.com/firestore/docs/manage-data/transactions "A transaction consists of any number of get() operations followed by any number of write operations such as set(), update(), or delete()" And When using transactions, note that: Read operations must come before write operations. A function calling a transaction (transaction

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