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Here's an example of using Oracle-specific API to call a static method on a raw Connection: C3P0Proxy Connection cast Con = (C3P0Proxy Connection) c3p0Data Connection(); Method m = CLOB.Method("create Temporary", new Class); Object args = new Object ; CLOB oracle CLOB = (CLOB) cast Connection Operation(m, null, args); C3P0 includes special support for some Oracle-specific methods. While c3p0 does not require very much configuration, it is very tweakable.Most of the interesting knobs and dials are represented as Java Bean properties.(See Appendix A for a comprehensive list of configuration properties.) All pooling is entirely transparent to users once a Data Source has been created.There are three ways of acquiring c3p0 pool-backed Data Sources: 1) directly instantiate and configure a to be the most convenient approach.Driver" ); //loads the jdbc driver Jdbc Url( "jdbc:postgresql://localhost/testdb" ); User("dbuser"); Password("dbpassword"); Do whatever you want with your Data Source, which will be backed by a Connection pool set up with default parameters.You can bind the Data Source to a JNDI name service, or use it directly, as you prefer.When you are done, you can clean up the Data Source you've created like this: c3p0 is an easy-to-use library for making traditional JDBC drivers "enterprise-ready" by augmenting them with functionality defined by the jdbc3 spec and the optional extensions to jdbc2.As of version 0.9.5, c3p0 fully supports the jdbc4 spec.
If you are sure your application only makes one Pooled Data Sources, or you can distinguish between the Data Sources by their configuration properties (inspected via "getters"), the first method may be sufficient.c3p0 does support property modifications midstream, however.If you obtain a Data Source by instantiating a , and wish to use a non-default configuration, you can supply a Map of property names (beginning with lower-case letters) to property values (either as Strings or "boxed" Java primitives like Integer or Boolean).Following Java Bean conventions, we note that if an Object has a property of type ..both, depending upon whether the property is read-only, write-only, or read-writable.There are several ways to modify c3p0 properties: You can directly alter the property values associated with a particular Data Source in your code, or you can configure c3p0 externally... Data Sources are usually configured before they are used, either during or immediately following their construction.
If you wish to use a named configuration, construct your Data Source ds_unpooled = Data Sources.unpooled Data Source("jdbc:postgresql://localhost/testdb", "swaldman", "test-password"); Data Source ds_pooled = Data Sources.pooled Data Source( ds_unpooled ); // The Data Source ds_pooled is now a fully configured and usable pooled Data Source. Data Source ds_unpooled = Data Sources.unpooled Data Source("jdbc:postgresql://localhost/testdb", "swaldman", "test-password"); Map overrides = new Hash Map(); overrides.put("max Statements", "200"); //Stringified property values work overrides.put("max Pool Size", new Integer(50)); //"boxed primitives" also work // create the Pooled Data Source using the default configuration and our overrides ds_pooled = Data Sources.pooled Data Source( ds_unpooled, overrides ); // The Data Source ds_pooled is now a fully configured and usable pooled Data Source, // with Statement caching enabled for a maximum of up to 200 statements and a maximum // of 50 Connections. // create the Pooled Data Source using the a named configuration and specified overrides // "intergalacto App" is a named configuration ds_pooled = Data Sources.pooled Data Source( ds_unpooled, "intergalacto App", overrides ); Data Source ds_unpooled = Data Sources.unpooled Data Source("jdbc:postgresql://localhost/testdb", "swaldman", "test-password"); Pool Config pc = new Pool Config(); Max Statements(200); //turn on Statement pooling // pass our overriding Pool Config to the Data Sources.pooled Data Source() factory method.