Compiler extension to check connection is closed

[anukeshi]

Description:

• When using the DB connectors (eg: mysql), the connection should be closed after the usage otherwise the connection will be exhausted. But currently there's no way to identify if user code has the connection close statement:

  check mysqlEndpoint.close(); 

• Hence it would be better if a compiler extension would support this requirement to do a static analysis on the code and check and throw a warning if user's code is missing the close statement.

• Related similar issue: https://github.com/ballerina-platform/ballerina-standard-library/issues/2400

[niveathika]

As discussed in the demo. Currently we cannot do code flow analysis to identify this specific use case.

For this compiler plugin extension must support code flow analysis.