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Fix concurrency issue in StartupMessageManager (#7483)

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Take Weiland 2020-11-20 19:17:00 +01:00 committed by GitHub
parent 6ec5a8f2c1
commit fa46f3dd49
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1 changed files with 28 additions and 11 deletions
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39
src/fmllauncher/java/net/minecraftforge/fml/loading/progress/StartupMessageManager.java
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@ -24,15 +24,12 @@ import com.google.common.base.CharMatcher;
import org.apache.commons.lang3.tuple.Pair;
import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.function.Consumer;
import java.util.stream.Collectors;
public class StartupMessageManager {
private static final EnumMap<MessageType, List<Message>> messages = new EnumMap<>(MessageType.class);
static {
Arrays.stream(MessageType.values()).forEach(mt->messages.computeIfAbsent(mt, k->new CopyOnWriteArrayList<>()));
}
private static volatile EnumMap<MessageType, List<Message>> messages = new EnumMap<>(MessageType.class);
public static List<Pair<Integer,Message>> getMessages() {
final long ts = System.nanoTime();
@ -88,22 +85,42 @@ public class StartupMessageManager {
}
}
private synchronized static void addMessage(MessageType type, String message, int maxSize)
{
EnumMap<MessageType, List<Message>> newMessages = new EnumMap<>(messages);
newMessages.compute(type, (key, existingList) -> {
List<Message> newList = new ArrayList<>();
if (existingList != null)
{
if (maxSize < 0)
{
newList.addAll(existingList);
}
else
{
newList.addAll(existingList.subList(0, Math.min(existingList.size(), maxSize)));
}
}
newList.add(new Message(message, type));
return newList;
});
messages = newMessages;
}
public static void addModMessage(final String message) {
final String safeMessage = Ascii.truncate(CharMatcher.ascii().retainFrom(message),80,"~");
final List<Message> messages = StartupMessageManager.messages.get(MessageType.MOD);
messages.subList(0, Math.max(0, messages.size() - 20)).clear();
messages.add(new Message(safeMessage, MessageType.MOD));
addMessage(MessageType.MOD, safeMessage, 20);
}
public static Optional<Consumer<String>> modLoaderConsumer() {
return Optional.of(s-> messages.get(MessageType.ML).add(new Message(s, MessageType.ML)));
return Optional.of(s-> addMessage(MessageType.ML, s, -1));
}
public static Optional<Consumer<String>> locatorConsumer() {
return Optional.of(s -> messages.get(MessageType.LOC).add(new Message(s, MessageType.LOC)));
return Optional.of(s -> addMessage(MessageType.LOC, s, -1));
}
public static Optional<Consumer<String>> mcLoaderConsumer() {
return Optional.of(s-> messages.get(MessageType.MC).add(new Message(s, MessageType.MC)));
return Optional.of(s-> addMessage(MessageType.MC, s, -1));
}
}