Examples of org.apache.tomcat.dbcp.dbcp2.PoolingDriver$PoolGuardConnectionWrapper

org.apache.tomcat.dbcp.dbcp2.SwallowedExceptionLogger
PoolGuardConnectionWrapper is a Connection wrapper that makes sure a closed connection cannot be used anymore. @since 2.0


        //
        // Finally, we create the PoolingDriver itself...
        //
        Class.forName("org.apache.commons.dbcp2.PoolingDriver");
        PoolingDriver driver = (PoolingDriver) DriverManager.getDriver("jdbc:apache:commons:dbcp:");


        //
        // ...and register our pool with it.
        //
        driver.registerPool("example",connectionPool);


        //
        // Now we can just use the connect string "jdbc:apache:commons:dbcp:example"
        // to access our pool of Connections.
        //

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        // to access our pool of Connections.
        //
    }


    public static void printDriverStats() throws Exception {
        PoolingDriver driver = (PoolingDriver) DriverManager.getDriver("jdbc:apache:commons:dbcp:");
        ObjectPool<? extends Connection> connectionPool = driver.getConnectionPool("example");


        System.out.println("NumActive: " + connectionPool.getNumActive());
        System.out.println("NumIdle: " + connectionPool.getNumIdle());
    }

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        System.out.println("NumActive: " + connectionPool.getNumActive());
        System.out.println("NumIdle: " + connectionPool.getNumIdle());
    }


    public static void shutdownDriver() throws Exception {
        PoolingDriver driver = (PoolingDriver) DriverManager.getDriver("jdbc:apache:commons:dbcp:");
        driver.closePool("example");
    }

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     */
    @Override
    public PreparedStatement prepareStatement(String sql) throws SQLException {
        checkOpen();
        try {
            return new DelegatingPreparedStatement
                (this, pooledConnection.prepareStatement(sql));
        }
        catch (SQLException e) {
            handleException(e); // Does not return
            return null;

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    public PreparedStatement prepareStatement(String sql, int resultSetType,
                                              int resultSetConcurrency)
            throws SQLException {
        checkOpen();
        try {
            return new DelegatingPreparedStatement
                (this, pooledConnection.prepareStatement
                    (sql,resultSetType,resultSetConcurrency));
        }
        catch (SQLException e) {
            handleException(e);

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                                              int resultSetConcurrency,
                                              int resultSetHoldability)
            throws SQLException {
        checkOpen();
        try {
            return new DelegatingPreparedStatement(this,
                    pooledConnection.prepareStatement(sql, resultSetType,
                            resultSetConcurrency, resultSetHoldability));
        }
        catch (SQLException e) {
            handleException(e);

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    @Override
    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
            throws SQLException {
        checkOpen();
        try {
            return new DelegatingPreparedStatement(this,
                    pooledConnection.prepareStatement(sql, autoGeneratedKeys));
        }
        catch (SQLException e) {
            handleException(e);
            return null;

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    @Override
    public PreparedStatement prepareStatement(String sql, int columnIndexes[])
            throws SQLException {
        checkOpen();
        try {
            return new DelegatingPreparedStatement(this,
                    pooledConnection.prepareStatement(sql, columnIndexes));
        }
        catch (SQLException e) {
            handleException(e);
            return null;

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    @Override
    public PreparedStatement prepareStatement(String sql, String columnNames[])
            throws SQLException {
        checkOpen();
        try {
            return new DelegatingPreparedStatement(this,
                    pooledConnection.prepareStatement(sql, columnNames));
        }
        catch (SQLException e) {
            handleException(e);
            return null;

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        pool.setTestOnReturn(getPerUserTestOnReturn(username));
        pool.setTestWhileIdle(getPerUserTestWhileIdle(username));
        pool.setTimeBetweenEvictionRunsMillis(
                getPerUserTimeBetweenEvictionRunsMillis(username));


        pool.setSwallowedExceptionListener(new SwallowedExceptionLogger(log));


        Object old = managers.put(getPoolKey(username), factory);
        if (old != null) {
            throw new IllegalStateException("Pool already contains an entry for this user/password: " + username);
        }

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