Examples of org.apache.commons.pool.ObjectPool

org.apache.commons.pool.ObjectPool
e the object... } catch(Exception e) { //...handle any exceptions... } finally { // make sure the object is returned to the pool if(null != obj) { pool.returnObject(obj); } } See {@link org.apache.commons.pool.BaseObjectPool BaseObjectPool} for a simple base implementation. @author Rodney Waldhoff @version $Revision: 1.10 $ $Date: 2003/10/09 21:45:56 $


    /**
     * Get the number of active connections in the pool for a given user.
     */
    public int getNumActive(String username, String password) {
        ObjectPool pool = (ObjectPool)pools.get(getPoolKey(username));
        return (pool == null) ? 0 : pool.getNumActive();
    }

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    /**
     * Get the number of idle connections in the pool for a given user.
     */
    public int getNumIdle(String username, String password) {
        ObjectPool pool = (ObjectPool)pools.get(getPoolKey(username));
        return (pool == null) ? 0 : pool.getNumIdle();
    }

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        this.config = properties;
    }


    DataSource createDataSource() {
        boolean connectionNoWrap = config.getBoolean(CONNECTION_NOWRAP, false);
        ObjectPool connectionPool = createConnectionPool();
        PoolingDataSource dataSource = new PoolingDataSource(connectionPool);
        dataSource.setAccessToUnderlyingConnectionAllowed(connectionNoWrap);


        return dataSource;
    }

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        int defaultTransactionIsolation = config.getTransactionIsolation(
                TRANSACTION_ISOLATION,
                Connection.TRANSACTION_SERIALIZABLE);
        String defaultCatalog = config.getString(CATALOG);


        ObjectPool connectionPool = new GenericObjectPool(null, poolConfig);


        // a side effect of PoolableConnectionFactory constructor call is that newly
        // created factory object is assigned to "connectionPool", which is definitely a
        // very confusing part of DBCP - new object is not visibly assigned to anything,
        // still it is preserved...

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        } catch(IllegalArgumentException e) {
            // expected
        }


        try {
            ObjectPool pool = new GenericObjectPool(
                new SimpleFactory(),
                GenericObjectPool.DEFAULT_MAX_ACTIVE, 
                Byte.MAX_VALUE,
                GenericObjectPool.DEFAULT_MAX_WAIT, 
                GenericObjectPool.DEFAULT_MAX_IDLE,

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        assertEquals("should be one active", 1, pool.getNumActive());
        pool.returnObject(obj);
        assertEquals("should be one idle", 1, pool.getNumIdle());
        assertEquals("should be zero active", 0, pool.getNumActive());


        ObjectPool op = new GenericObjectPool();
        try {
            op.addObject();
            fail("Expected IllegalStateException when there is no factory.");
        } catch (IllegalStateException ise) {
            //expected
        }
        op.close();
    }

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    /**
     * Get the number of active connections in the pool for a given user.
     */
    public int getNumActive(String username, String password) {
        ObjectPool pool = (ObjectPool)pools.get(getPoolKey(username));
        return (pool == null) ? 0 : pool.getNumActive();
    }

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    /**
     * Get the number of idle connections in the pool for a given user.
     */
    public int getNumIdle(String username, String password) {
        ObjectPool pool = (ObjectPool)pools.get(getPoolKey(username));
        return (pool == null) ? 0 : pool.getNumIdle();
    }

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        catch (SQLException e) { }
    }
    
    /** @see http://issues.apache.org/bugzilla/show_bug.cgi?id=12400 */
    public void testReportedBug12400() throws Exception {
        ObjectPool connectionPool = new GenericObjectPool(
            null,
            70,
            GenericObjectPool.WHEN_EXHAUSTED_BLOCK,
            60000,
            10);

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    public void testInvalidateConnection() throws Exception {
        Connection conn = DriverManager.getConnection("jdbc:apache:commons:dbcp:test");
        assertNotNull(conn);


        ObjectPool pool = driver.getConnectionPool("test");
        assertEquals(1, pool.getNumActive());
        assertEquals(0, pool.getNumIdle());


        PoolingDriver driver = (PoolingDriver) DriverManager.getDriver("jdbc:apache:commons:dbcp:");
        driver.invalidateConnection(conn);


        assertEquals(0, pool.getNumActive());
        assertEquals(0, pool.getNumIdle());
        assertTrue(conn.isClosed());
    }

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