78 lines
2.5 KiB
Java
78 lines
2.5 KiB
Java
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/**
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* The MIT License
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* Copyright (c) 2014 Ilkka Seppälä
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package com.iluwatar.mute;
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import java.io.ByteArrayOutputStream;
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import java.sql.Connection;
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import java.sql.SQLException;
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public class App {
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public static void main(String[] args) {
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useOfLoggedMute();
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useOfMute();
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}
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/*
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* Typically used when the API declares some exception but cannot do so. Usually a signature mistake.
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* In this example out is not supposed to throw exception as it is a ByteArrayOutputStream. So we
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* utilize mute, which will throw AssertionError if unexpected exception occurs.
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*/
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private static void useOfMute() {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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Mute.mute(() -> out.write("Hello".getBytes()));
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}
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private static void useOfLoggedMute() {
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Connection connection = openConnection();
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try {
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readStuff(connection);
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} catch (SQLException ex) {
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ex.printStackTrace();
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} finally {
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closeConnection(connection);
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}
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}
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/*
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* All we can do while failed close of connection is to log it.
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*/
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private static void closeConnection(Connection connection) {
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if (connection != null) {
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Mute.loggedMute(() -> connection.close());
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}
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}
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private static void readStuff(Connection connection) throws SQLException {
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if (connection != null) {
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connection.createStatement();
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}
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}
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private static Connection openConnection() {
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return null;
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}
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}
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