connection-pool

问题 Now the project is using springmvc+ spring + mybatis + druid + postgresql The users in the project correspond to the users in the database, so each time you run SQL, you switch the users with the (set role user) command and then perform the crud operations of the database. My question: Because there are many connections in the connection pool, the first step is to get the connection of the database, then switch users, and then perform the operation of business SQL on the database. But I don't

问题 Now the project is using springmvc+ spring + mybatis + druid + postgresql The users in the project correspond to the users in the database, so each time you run SQL, you switch the users with the (set role user) command and then perform the crud operations of the database. My question: Because there are many connections in the connection pool, the first step is to get the connection of the database, then switch users, and then perform the operation of business SQL on the database. But I don't

问题 The concept is that, after a successfull save of my object, it should update a text in the database (With a Hook). Lets call the field ' succText '. The table i would like to access is the sys_file but i only get the sys_file_reference id when i save the object. So i thought i could use the ConnectionPool to select the sys_file row of this file reference and then insert the data on the field ' succText '. I tried this: public function processDatamap_preProcessFieldArray(array &$fieldArray,

问题 There are numerous questions about using a db connection pool with Google App Engine, but a lot has changed recently. Up to this point, I could never get a connection pool to work with GAE. However, I think some recent develops may allow connection pooling to work, which may be why it is mentioned in the Google documentation (which seems to have recently been updated). https://cloud.google.com/sql/docs/mysql/connect-app-engine Can someone confirm that connection pools can be used? 1) We used

问题 In my spark streaming app, I have many I/O operations, such as codis, hbase, etc. I want to make sure exactly one connection pool in each executor, how can I do this elegantly? Now, I implement some static class dispersedly, this is not good for management. How about centralize them into one class like xxContext, some what like SparkContext, and need I broadcast it? I know it's good to broadcast large read-only dataset, but how about these connection pools? Java or scala are both acceptable.