144 lines
3.8 KiB
Java
144 lines
3.8 KiB
Java
package org.multimc;/*
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* Copyright 2012-2021 MultiMC Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import org.multimc.exception.ParseException;
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import org.multimc.utils.Parameters;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.nio.charset.StandardCharsets;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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public final class EntryPoint {
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private static final Logger LOGGER = Logger.getLogger("EntryPoint");
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private final Parameters params = new Parameters();
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private String launcherType;
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public static void main(String[] args) {
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EntryPoint listener = new EntryPoint();
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int retCode = listener.listen();
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if (retCode != 0) {
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LOGGER.info("Exiting with " + retCode);
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System.exit(retCode);
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}
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}
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private Action parseLine(String inData) throws ParseException {
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String[] tokens = inData.split("\\s+", 2);
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if (tokens.length == 0)
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throw new ParseException("Unexpected empty string!");
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switch (tokens[0]) {
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case "launch": {
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return Action.Launch;
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}
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case "abort": {
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return Action.Abort;
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}
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case "launcher": {
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if (tokens.length != 2)
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throw new ParseException("Expected 2 tokens, got " + tokens.length);
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launcherType = tokens[1];
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return Action.Proceed;
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}
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default: {
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if (tokens.length != 2)
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throw new ParseException("Error while parsing:" + inData);
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params.add(tokens[0], tokens[1]);
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return Action.Proceed;
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}
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}
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}
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public int listen() {
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Action action = Action.Proceed;
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try (BufferedReader reader = new BufferedReader(new InputStreamReader(
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System.in,
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StandardCharsets.UTF_8
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))) {
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String line;
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while (action == Action.Proceed) {
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if ((line = reader.readLine()) != null) {
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action = parseLine(line);
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} else {
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action = Action.Abort;
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}
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}
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} catch (IOException | ParseException e) {
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LOGGER.log(Level.SEVERE, "Launcher ABORT due to exception:", e);
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return 1;
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}
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// Main loop
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if (action == Action.Abort) {
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LOGGER.info("Launch aborted by the launcher.");
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return 1;
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}
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if (launcherType != null) {
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try {
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Launcher launcher =
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LauncherFactory
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.getInstance()
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.createLauncher(launcherType, params);
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launcher.launch();
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return 0;
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} catch (IllegalArgumentException e) {
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LOGGER.log(Level.SEVERE, "Wrong argument.", e);
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return 1;
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} catch (Exception e) {
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LOGGER.log(Level.SEVERE, "Exception caught from launcher.", e);
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return 1;
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}
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}
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LOGGER.log(Level.SEVERE, "No valid launcher implementation specified.");
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return 1;
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}
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private enum Action {
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Proceed,
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Launch,
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Abort
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}
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}
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