pollymc/libraries/launcher/org/multimc/EntryPoint.java

144 lines
3.9 KiB
Java
Raw Normal View History

package org.multimc;/*
2021-01-18 12:58:54 +05:30
* Copyright 2012-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.multimc.exception.ParseException;
import org.multimc.utils.ParamBucket;
2022-04-24 19:15:01 +05:30
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.logging.Level;
import java.util.logging.Logger;
public final class EntryPoint {
2022-04-24 19:15:01 +05:30
private static final Logger LOGGER = Logger.getLogger("EntryPoint");
2022-04-24 19:15:01 +05:30
private final ParamBucket params = new ParamBucket();
private String launcherType;
public static void main(String[] args) {
2018-07-15 18:21:05 +05:30
EntryPoint listener = new EntryPoint();
2022-04-24 19:15:01 +05:30
2018-07-15 18:21:05 +05:30
int retCode = listener.listen();
2022-04-24 19:15:01 +05:30
if (retCode != 0) {
LOGGER.info("Exiting with " + retCode);
2018-07-15 18:21:05 +05:30
System.exit(retCode);
}
}
private Action parseLine(String inData) throws ParseException {
2022-04-25 15:52:56 +05:30
String[] tokens = inData.split("\\s+", 2);
2022-04-25 15:52:56 +05:30
if (tokens.length == 0)
2022-04-24 19:15:01 +05:30
throw new ParseException("Unexpected empty string!");
2022-04-25 15:52:56 +05:30
switch (tokens[0]) {
2022-04-24 19:15:01 +05:30
case "launch": {
2018-07-15 18:21:05 +05:30
return Action.Launch;
2022-04-24 19:15:01 +05:30
}
2022-04-24 19:15:01 +05:30
case "abort": {
2018-07-15 18:21:05 +05:30
return Action.Abort;
2022-04-24 19:15:01 +05:30
}
2022-04-24 19:15:01 +05:30
case "launcher": {
2022-04-25 15:52:56 +05:30
if (tokens.length != 2)
throw new ParseException("Expected 2 tokens, got " + tokens.length);
launcherType = tokens[1];
return Action.Proceed;
2022-04-24 19:15:01 +05:30
}
default: {
2022-04-25 15:52:56 +05:30
if (tokens.length != 2)
throw new ParseException("Error while parsing:" + inData);
2022-04-24 19:15:01 +05:30
2022-04-25 15:52:56 +05:30
params.add(tokens[0], tokens[1]);
2018-07-15 18:21:05 +05:30
return Action.Proceed;
}
}
}
public int listen() {
2022-04-24 19:15:01 +05:30
Action action = Action.Proceed;
try (BufferedReader reader = new BufferedReader(new InputStreamReader(
System.in,
StandardCharsets.UTF_8
))) {
String line;
while (action == Action.Proceed) {
if ((line = reader.readLine()) != null) {
action = parseLine(line);
} else {
action = Action.Abort;
}
}
} catch (IOException | ParseException e) {
LOGGER.log(Level.SEVERE, "Launcher ABORT due to exception:", e);
2022-04-24 19:15:01 +05:30
2018-07-15 18:21:05 +05:30
return 1;
}
2022-04-24 19:15:01 +05:30
2018-07-15 18:21:05 +05:30
// Main loop
if (action == Action.Abort) {
LOGGER.info("Launch aborted by the launcher.");
2018-07-15 18:21:05 +05:30
return 1;
}
2022-04-24 19:15:01 +05:30
if (launcherType != null) {
try {
Launcher launcher =
LauncherFactory
.getInstance()
.createLauncher(launcherType, params);
launcher.launch();
return 0;
} catch (IllegalArgumentException e) {
LOGGER.log(Level.SEVERE, "Wrong argument.", e);
return 1;
} catch (Exception e) {
LOGGER.log(Level.SEVERE, "Exception caught from launcher.", e);
return 1;
}
2018-07-15 18:21:05 +05:30
}
2022-04-24 19:15:01 +05:30
LOGGER.log(Level.SEVERE, "No valid launcher implementation specified.");
2022-04-24 19:15:01 +05:30
2018-07-15 18:21:05 +05:30
return 1;
}
2022-04-24 19:15:01 +05:30
private enum Action {
Proceed,
Launch,
Abort
}
}