Fetching of data from database while updating data watch hitched or ditched online dating
Local Connection Specifying the handle Name as indicates that the connection resource is recreated for every template that makes use of the same handle Name.
Please note that, you can make use of the same handle Name across templates.
I'm going to take classic and the most popular approach which makes use of Jdbc Template class of the framework.
This is the central framework class that manages all the database communication and exception handling.
You can configure the Data Source in the XML file with a piece of code as shown in the following code snippet − DAO stands for Data Access Object, which is commonly used for database interaction.
DAOs exist to provide a means to read and write data to the database and they should expose this functionality through an interface by which the rest of the application will access them.
Similarly, the resultset obtained by executing the SQLCommand present in the SQLInput5, is used to populate the SQLInput with IDs 6, 7 and 8.
One or more Context tags can be used to fetch/update inventory data from one or more databases as per the provisioning operation performed. The connection obtained from the database to fetch/update the inventory data could be created locally or globally.
Locally created connection resource is destructed, once the template completes the provisioning operation.
Instances of the Jdbc Template class are threadsafe once configured.
So you can configure a single instance of a Jdbc Template and then safely inject this shared reference into multiple DAOs.
While working with the database using plain old JDBC, it becomes cumbersome to write unnecessary code to handle exceptions, opening and closing database connections, etc.