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  • getConnection() and OracleDataSource

    I am using the OracleDataSource for ConnectionPooling and setting a max
    limit to the Pool size. I am also using the
    TransactionAwareDataSourceProxy class, the AbstractRoutingDataSource
    class and the DataSourceUtils.getConnection() method to get a Connection
    from the DataSource.

    When I attempt to get a Connection from an OracleDataSource which has
    reached the max, the OracleDataSource returns a null for the Connection
    (not an Exception) The code in DataSourceUtils.getConnection() does not
    check for null and the Connection Proxy class is created with a null
    target for the Connection. An Exception is not thrown until an attempt
    is made to use the Connection here:

    java.lang.NullPointerException
    at
    org.springframework.jdbc.datasource.TransactionAwa reDataSourceProxy$Tran
    sactionAwareInvocationHandler.invoke(TransactionAw areDataSourceProxy.jav
    a:168)
    at $Proxy0.createStatement(Unknown Source)


    I would prefer to get some Exception or indicator when the
    getConnection() fails (for whatever reason). Since I am using the
    AbstractRoutingDataSource(), I could then try to get a Connection from
    another DataSouce which may have Connections available.

    Is it correct to create a Proxy class around a null Connection? Is this a bug?
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