public interface C3P0ProxyConnection extends java.sql.Connection
Most clients need never use or know about this interface -- c3p0-provided Connections can be treated like any other Connection.
An interface implemented by proxy Connections returned by c3p0 PooledDataSources. It provides protected access to the underlying dbms-vendor specific Connection, which may be useful if you want to access non-standard API offered by your jdbc driver.
|Modifier and Type||Field and Description|
A token representing an unwrapped, unproxied jdbc Connection for use in
|Modifier and Type||Method and Description|
Allows one to work with the unproxied, raw Connection.
abort, clearWarnings, close, commit, createArrayOf, createBlob, createClob, createNClob, createSQLXML, createStatement, createStatement, createStatement, createStruct, getAutoCommit, getCatalog, getClientInfo, getClientInfo, getHoldability, getMetaData, getNetworkTimeout, getSchema, getTransactionIsolation, getTypeMap, getWarnings, isClosed, isReadOnly, isValid, nativeSQL, prepareCall, prepareCall, prepareCall, prepareStatement, prepareStatement, prepareStatement, prepareStatement, prepareStatement, prepareStatement, releaseSavepoint, rollback, rollback, setAutoCommit, setCatalog, setClientInfo, setClientInfo, setHoldability, setNetworkTimeout, setReadOnly, setSavepoint, setSavepoint, setSchema, setTransactionIsolation, setTypeMap
static final java.lang.Object RAW_CONNECTION
rawConnectionOperation(java.lang.reflect.Method, java.lang.Object, java.lang.Object)
java.lang.Object rawConnectionOperation(java.lang.reflect.Method m, java.lang.Object target, java.lang.Object args) throws java.lang.IllegalAccessException, java.lang.IllegalArgumentException, java.lang.reflect.InvocationTargetException, java.sql.SQLException
Allows one to work with the unproxied, raw Connection. Some database companies never got over the "common interfaces mean no more vendor lock-in!" thing, and offer non-standard API on their Connections. This method permits you to "pierce" the connection-pooling layer to call non-standard methods on the original Connection, or to pass the original Connections to functions that are not implementation neutral.
To use this functionality, you'll need to cast a Connection retrieved from a c3p0 PooledDataSource to a C3P0ProxyConnection.
This method works by making a reflective call of method m on Object target (which may be null for static methods), passing and argument list args. For the method target, or for any argument, you may substitute the special token C3P0ProxyConnection.RAW_CONNECTION
Any Statements or ResultSets returned by the operation will be proxied and c3p0-managed, meaning that these resources will be automatically closed if the user does not close them first when this Connection is checked back into the pool. Any other resources returned by the operation are the user's responsibility to clean up!
Incautious use of this method can corrupt the Connection pool, by breaking the invariant that all checked-in Connections should be equivalent. If your vendor supplies API that allows you to modify the state or configuration of a Connection in some nonstandard way, you might use this method to do so, and then check the Connection back into the pool. When you fetch another Connection from the PooledDataSource, it will be undefined whether the Connection returned will have your altered configuration, or the default configuration of a "fresh" Connection. Thus, it is inadvisable to use this method to call nonstandard mutators.