diff options
| -rw-r--r-- | libraries/launcher/org/prismlauncher/EntryPoint.java | 83 |
1 files changed, 49 insertions, 34 deletions
diff --git a/libraries/launcher/org/prismlauncher/EntryPoint.java b/libraries/launcher/org/prismlauncher/EntryPoint.java index 987dcc12..07af4e55 100644 --- a/libraries/launcher/org/prismlauncher/EntryPoint.java +++ b/libraries/launcher/org/prismlauncher/EntryPoint.java @@ -71,22 +71,26 @@ import java.util.logging.Logger; public final class EntryPoint { private static final Logger LOGGER = Logger.getLogger("EntryPoint"); - + + private EntryPoint() { + } + public static void main(String[] args) { ExitCode exitCode = listen(); - + if (exitCode != ExitCode.NORMAL) { LOGGER.warning("Exiting with " + exitCode); - + + //noinspection CallToSystemExit System.exit(exitCode.numericalCode); } } - + private static PreLaunchAction parseLine(String input, Parameters params) throws ParseException { - if (input.isEmpty()) - throw new ParseException("Unexpected empty string!"); - - + if (input.isEmpty()) // TODO: 2022-11-01 Should we just ignore this? + throw new ParseException("Unexpected empty string! You should not pass empty newlines to stdin."); + + if ("launch".equalsIgnoreCase(input)) { return PreLaunchAction.LAUNCH; } else if ("abort".equalsIgnoreCase(input)) { @@ -94,22 +98,26 @@ public final class EntryPoint { } else { String[] pair = StringUtils.splitStringPair(' ', input); if (pair == null) - throw new ParseException("Error while parsing:" + input); - + throw new ParseException(String.format( + "Could not split input string '%s' by space. All input provided from stdin must be either 'launch', 'abort', or " + + "in the format '[param name] [param]'.", + input)); + params.add(pair[0], pair[1]); - + return PreLaunchAction.PROCEED; } } - + private static ExitCode listen() { Parameters parameters = new Parameters(); PreLaunchAction preLaunchAction = PreLaunchAction.PROCEED; - + try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8))) { String line; - + while (preLaunchAction == PreLaunchAction.PROCEED) { + //noinspection NestedAssignment if ((line = reader.readLine()) != null) { preLaunchAction = parseLine(line, parameters); } else { @@ -117,51 +125,58 @@ public final class EntryPoint { } } } catch (IOException | ParseException e) { - LOGGER.log(Level.SEVERE, "Launcher abort due to exception:", e); - - return ExitCode.ERROR; + LOGGER.log(Level.SEVERE, "Launcher abort due to exception", e); + + return ExitCode.ILLEGAL_ARGUMENT; } - + // Main loop if (preLaunchAction == PreLaunchAction.ABORT) { LOGGER.info("Launch aborted by the launcher."); - - return ExitCode.ERROR; + + return ExitCode.ABORT; } - + try { Launcher launcher = LauncherFactory.createLauncher(parameters); - + launcher.launch(); - + return ExitCode.NORMAL; } catch (IllegalArgumentException e) { LOGGER.log(Level.SEVERE, "Wrong argument.", e); - - return ExitCode.ERROR; + + return ExitCode.ILLEGAL_ARGUMENT; + } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException e) { + LOGGER.log(Level.SEVERE, "Caught reflection exception from launcher", e); + + return ExitCode.REFLECTION_EXCEPTION; } catch (Throwable e) { - LOGGER.log(Level.SEVERE, "Exception caught from launcher.", e); - + LOGGER.log(Level.SEVERE, "Exception caught from launcher", e); + return ExitCode.ERROR; } } - + private enum PreLaunchAction { PROCEED, LAUNCH, ABORT } - - + + private enum ExitCode { NORMAL(0), - ERROR(1); - + ABORT(1), + ERROR(2), + ILLEGAL_ARGUMENT(3), + REFLECTION_EXCEPTION(4); + private final int numericalCode; - + ExitCode(int numericalCode) { this.numericalCode = numericalCode; } } - + } |