1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
package org.multimc;/*
* 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;
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 {
private static final Logger LOGGER = Logger.getLogger("EntryPoint");
private final ParamBucket params = new ParamBucket();
private String launcherType;
public static void main(String[] args) {
EntryPoint listener = new EntryPoint();
int retCode = listener.listen();
if (retCode != 0) {
LOGGER.info("Exiting with " + retCode);
System.exit(retCode);
}
}
private Action parseLine(String inData) throws ParseException {
String[] tokens = inData.split("\\s+", 2);
if (tokens.length == 0)
throw new ParseException("Unexpected empty string!");
switch (tokens[0]) {
case "launch": {
return Action.Launch;
}
case "abort": {
return Action.Abort;
}
case "launcher": {
if (tokens.length != 2)
throw new ParseException("Expected 2 tokens, got " + tokens.length);
launcherType = tokens[1];
return Action.Proceed;
}
default: {
if (tokens.length != 2)
throw new ParseException("Error while parsing:" + inData);
params.add(tokens[0], tokens[1]);
return Action.Proceed;
}
}
}
public int listen() {
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);
return 1;
}
// Main loop
if (action == Action.Abort) {
LOGGER.info("Launch aborted by the launcher.");
return 1;
}
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;
}
}
LOGGER.log(Level.SEVERE, "No valid launcher implementation specified.");
return 1;
}
private enum Action {
Proceed,
Launch,
Abort
}
}
|
