Example usage for org.apache.commons.dbcp DelegatingConnection DelegatingConnection

Introduction

In this page you can find the example usage for org.apache.commons.dbcp DelegatingConnection DelegatingConnection.

Prototype

public DelegatingConnection(Connection c) 

Source Link

Document

Create a wrapper for the Connection which traces this Connection in the AbandonedObjectPool.

Usage

From source file:com.p6spy.engine.common.P6WrapperIsWrapperDelegateTest.java

@Test
public void testProxyOfWrappedConnection() throws SQLException {
    // this will be the actual connection
    Connection con = new TestConnectionImpl();

    // use a wrapper from DBCP to create a proxy of a proxy
    // Note: DBCP implements with JDBC 4.0 API so the Wrapper interface
    // is implemented here.
    DelegatingConnection underlying = new DelegatingConnection(con);

    Connection proxy = ProxyFactory.createProxy(underlying,
            new GenericInvocationHandler<Connection>(underlying));

    // TestConnection is an interface of the wrapped underlying object.
    assertTrue(proxy.isWrapperFor(TestConnection.class));

    // ResultSet is not implemented at all - false should be returned
    assertFalse(proxy.isWrapperFor(ResultSet.class));

}

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From source file:com.p6spy.engine.common.P6WrapperUnwrapDelegateTest.java

@Test
public void testProxyOfWrappedConnection() throws SQLException {
    // this will be the actual connection
    Connection con = new TestConnectionImpl();

    // use a wrapper from DBCP to create a proxy of a proxy
    // Note: DBCP implements with JDBC 4.0 API so the Wrapper interface
    // is implemented here.
    DelegatingConnection underlying = new DelegatingConnection(con);

    Connection proxy = ProxyFactory.createProxy(underlying,
            new GenericInvocationHandler<Connection>(underlying));

    // TestConnection is an interface of the actual connection but not of the proxy.  Unwrapping works
    // but a proxy is not returned
    {/*from  w  w  w. ja v a 2s.co  m*/
        TestConnection unwrapped = proxy.unwrap(TestConnection.class);
        assertFalse(ProxyFactory.isProxy(unwrapped));
    }

    // ResultSet is not implemented at all - an exception will be thrown
    try {
        proxy.unwrap(ResultSet.class);
        fail("Expected exception not thrown");
    } catch (SQLException e) {
    }

}

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