Provide data source status in order to manage auto-reconnect

Hi,

We encountered a disconnection issue with our PostgreSQL database, after our application was running during several hours.

In order to re-open the connection in these cases, we used reflection to check the status of the closed private field of the C3P0DataSource class :

Field closedField = C3P0DataSource.class.getDeclaredField("closed");
closedField.setAccessible(true);
AtomicBoolean closed = (AtomicBoolean)closedField.get(graph.getSqlgDataSource());

if(closed.get()) {
    graph = SqlgGraph.open(graphConfiguration.getConfiguration());
}

When I close manually the connection, this field is correctly updated and I am able to re-open it, but as this is a private field I am not confident using it and don’t know if it will be reliable in case of random connection loose.

Is that field reliable for our needs ? If so, is it possible to provide it with a public accessor ?

If no, is there any auto-reconnect mechanism available ? Or is it possible to provide some ?

Thank you very much

[pietermartin]

Not sure if you are still interested in this. C3P0 pool has a jmx interface that one can check and call operations on. I tested resetting the pool from there and it works fine. I am adding some code to make the data source’s name readable.

Sqlg also makes some stats available via json. sqlgGraph.getSqlgDataSource().getPoolStatsAsJson()

[niushapaks]

Hi, I’m not working on the project using sqlg anymore, but thank you for looking on it 👍