public void close()

in src/main/java/org/apache/commons/dbcp2/PoolableConnection.java [181:240]
44 lines of code
11 McCabe index (conditional complexity)

    public void close() throws SQLException {
        lock.lock();
        try {
            if (isClosedInternal()) {
                // already closed
                return;
            }

            boolean isUnderlyingConnectionClosed;
            try {
                isUnderlyingConnectionClosed = getDelegateInternal().isClosed();
            } catch (final SQLException e) {
                try {
                    pool.invalidateObject(this);
                } catch (final IllegalStateException ise) {
                    // pool is closed, so close the connection
                    passivate();
                    getInnermostDelegate().close();
                } catch (final Exception ignored) {
                    // DO NOTHING the original exception will be rethrown
                }
                throw new SQLException("Cannot close connection (isClosed check failed)", e);
            }

            /*
             * Can't set close before this code block since the connection needs to be open when validation runs. Can't set
             * close after this code block since by then the connection will have been returned to the pool and may have
             * been borrowed by another thread. Therefore, the close flag is set in passivate().
             */
            if (isUnderlyingConnectionClosed) {
                // Abnormal close: underlying connection closed unexpectedly, so we
                // must destroy this proxy
                try {
                    pool.invalidateObject(this);
                } catch (final IllegalStateException e) {
                    // pool is closed, so close the connection
                    passivate();
                    getInnermostDelegate().close();
                } catch (final Exception e) {
                    throw new SQLException("Cannot close connection (invalidating pooled object failed)", e);
                }
            } else {
                // Normal close: underlying connection is still open, so we
                // simply need to return this proxy to the pool
                try {
                    pool.returnObject(this);
                } catch (final IllegalStateException e) {
                    // pool is closed, so close the connection
                    passivate();
                    getInnermostDelegate().close();
                } catch (final SQLException | RuntimeException e) {
                    throw e;
                } catch (final Exception e) {
                    throw new SQLException("Cannot close connection (return to pool failed)", e);
                }
            }
        } finally {
            lock.unlock();
        }
    }