davsclaus commented on code in PR #27516:
URL: https://github.com/apache/camel/pull/27516#discussion_r4212579932
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dsl/camel-jbang/camel-jbang-plugin-tui/src/main/java/org/apache/camel/dsl/jbang/core/commands/tui/LaunchManager.java:
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@@ -414,6 +509,49 @@ private void notify(String msg, boolean error) {
*/
static final long WATCH_MS = 5 * 60_000;
+ // how the latest launch of each name went, for an agent that asks
(tui_run_example waits for it)
+ private final Map<String, LaunchOutcome> outcomes = new
ConcurrentHashMap<>();
+
+ /**
+ * How a launch went: started (Camel said so), or failed with the end of
its output; null while it is starting.
+ */
+ record LaunchOutcome(boolean ok, String log) {
+
+ private static final Pattern ANSI =
Pattern.compile("\u001B\\[[0-9;]*m");
+
+ static LaunchOutcome started() {
+ return new LaunchOutcome(true, null);
+ }
+
+ static LaunchOutcome failed(Path outputFile) {
+ String tail = null;
+ try {
+ // without colors and stack frames: the messages and their
causes are what tell why
+ List<String> lines = Files.readAllLines(outputFile,
StandardCharsets.UTF_8).stream()
+ .map(l -> ANSI.matcher(l).replaceAll(""))
+ .filter(l -> !l.stripLeading().startsWith("at ") &&
!l.stripLeading().startsWith("... "))
+ .toList();
+ tail = String.join("\n", lines.subList(Math.max(0,
lines.size() - 30), lines.size()));
+ } catch (Exception e) {
+ // no output to show
+ }
+ return new LaunchOutcome(false, tail);
+ }
Review Comment:
The suggested version collects every line into a list as well, so it holds
the same in memory. The file is read once, when a start has failed, and it is
the output of one start. Keeping it as is.
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