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fixing-busy waiting loop #server session #3126

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39 changes: 20 additions & 19 deletions server-session/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -64,29 +64,30 @@ public class App {

private static void sessionExpirationTask() {
new Thread(() -> {
while (true) {
try {
Thread.sleep(SESSION_EXPIRATION_TIME);
Instant currentTime = Instant.now();
synchronized (sessions) {
synchronized (sessionCreationTimes) {
Iterator<Map.Entry<String, Instant>> iterator =
sessionCreationTimes.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<String, Instant> entry = iterator.next();
if (entry.getValue().plusMillis(SESSION_EXPIRATION_TIME).isBefore(currentTime)) {
sessions.remove(entry.getKey());
iterator.remove();
while (true) {
try {
Thread.sleep(SESSION_EXPIRATION_TIME);
Instant currentTime = Instant.now();
synchronized (sessions) {
synchronized (sessionCreationTimes) {
Iterator<Map.Entry<String, Instant>> iterator =
sessionCreationTimes.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<String, Instant> entry = iterator.next();
if (entry.getValue().plusMillis(SESSION_EXPIRATION_TIME).isBefore(currentTime)) {
sessions.remove(entry.getKey());
iterator.remove();
System.out.println("Session expired for user: " + entry.getKey());
}
}
}
}
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
break;
}
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}).start();
}
}
```

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