How do I check for an open connection in jdbc for oracle database?
Note: conn.isClosed() cannot be used for this.
How do I check for an open connection in jdbc for oracle database? Note:
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How do I check for an open connection in jdbc for oracle database?
Note: conn.isClosed() cannot be used for this.
Usually a Connection Pool will also use the Connection.isClosed() method to check if the Connection is still valid. The problem is that not all JDBC drivers will handle this call correctly. So I assume that there are some simple check statements just like RealHowTo said. For Oracle he already mentioned the ‘SELECT 1 FROM Dual’ which should succeed always for Oracle databases. I think that there are similar queries for the different database. I can remember that in a previous project we also implemented an own Connection Pool which used such validation queries.