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Greatly improve DeferredWorkQueue API (#5357)

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tterrag 2019-01-18 21:10:22 -05:00 committed by GitHub
parent 0d1a2f2af3
commit ff2e35c243
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3 changed files with 183 additions and 20 deletions
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196
src/main/java/net/minecraftforge/fml/DeferredWorkQueue.java
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@ -19,26 +19,190 @@
package net.minecraftforge.fml;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentLinkedDeque;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import static net.minecraftforge.fml.Logging.LOADING;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionException;
import java.util.concurrent.ConcurrentLinkedDeque;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;
import java.util.function.Supplier;
import org.apache.commons.lang3.time.StopWatch;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import com.google.common.base.Function;
import com.google.common.base.Stopwatch;
import net.minecraft.util.IThreadListener;
import net.minecraftforge.forgespi.language.IModInfo;
/**
* Utility for running code on the main launch thread at the next available
* opportunity. There is no guaranteed order that work from various mods will be
* run, but your own work will be run sequentially.
* <p>
* <strong>Use of this class after startup is not possible.</strong> At that
* point, {@link IThreadListener} should be used instead.
* <p>
* Exceptions from tasks will be handled gracefully, causing a mod loading
* error. Tasks that take egregiously long times to run will be logged.
*/
public class DeferredWorkQueue
{
public static ConcurrentLinkedDeque<FutureWorkTask<?>> deferredWorkQueue = new ConcurrentLinkedDeque<>();
public static <T> Future<T> enqueueWork(Callable<T> workToEnqueue) {
final FutureWorkTask<T> workTask = new FutureWorkTask<>(workToEnqueue);
DeferredWorkQueue.deferredWorkQueue.add(workTask);
return workTask;
}
public static class FutureWorkTask<T> extends FutureTask<T>
private static class TaskInfo
{
FutureWorkTask(Callable<T> callable)
{
super(callable);
public final IModInfo owner;
public final Runnable task;
TaskInfo(IModInfo owner, Runnable task) {
this.owner = owner;
this.task = task;
}
}
/**
* {@link Runnable} except it allows throwing checked exceptions.
*
* Is to {@link Runnable} as {@link Callable} is to {@link Supplier}.
*/
@FunctionalInterface
public interface CheckedRunnable
{
void run() throws Exception;
}
private static final Logger LOGGER = LogManager.getLogger();
private static ThreadLocal<ModContainer> currentOwner = new ThreadLocal<>();
private static List<ModLoadingException> raisedExceptions = new ArrayList<>();
private static final ConcurrentLinkedDeque<TaskInfo> taskQueue = new ConcurrentLinkedDeque<>();
private static final Executor deferredExecutor = r -> taskQueue.add(new TaskInfo(currentOwner.get().getModInfo(), r));
private static <T> Function<Throwable, T> handleException() {
final ModContainer owner = currentOwner.get();
return t -> {
LogManager.getLogger(DeferredWorkQueue.class).error("Encountered exception executing deferred work", t);
raisedExceptions.add(new ModLoadingException(owner.getModInfo(), owner.getCurrentState(), "fml.modloading.failedtoprocesswork", t));
return null;
};
}
/**
* Run a task on the loading thread at the next available opportunity, i.e.
* after the current lifecycle event has completed.
* <p>
* If the task must throw a checked exception, use
* {@link #runLaterChecked(CheckedRunnable)}.
* <p>
* If the task has a result, use {@link #getLater(Supplier)} or
* {@link #getLaterChecked(Callable)}.
*
* @param workToEnqueue A {@link Runnable} to execute later, on the loading
* thread
* @return A {@link CompletableFuture} that completes at said time
*/
public static CompletableFuture<Void> runLater(Runnable workToEnqueue) {
currentOwner.set(ModThreadContext.get().getActiveContainer());
return CompletableFuture.runAsync(workToEnqueue, deferredExecutor).exceptionally(DeferredWorkQueue.handleException());
}
/**
* Run a task on the loading thread at the next available opportunity, i.e.
* after the current lifecycle event has completed. This variant allows the task
* to throw a checked exception.
* <p>
* If the task does not throw a checked exception, use
* {@link #runLater(Runnable)}.
* <p>
* If the task has a result, use {@link #getLater(Supplier)} or
* {@link #getLaterChecked(Callable)}.
*
* @param workToEnqueue A {@link CheckedRunnable} to execute later, on the
* loading thread
* @return A {@link CompletableFuture} that completes at said time
*/
public static CompletableFuture<Void> runLaterChecked(CheckedRunnable workToEnqueue) {
return runLater(() -> {
try {
workToEnqueue.run();
} catch (Throwable t) {
throw new CompletionException(t);
}
});
}
/**
* Run a task computing a result on the loading thread at the next available
* opportunity, i.e. after the current lifecycle event has completed.
* <p>
* If the task throws a checked exception, use
* {@link #getLaterChecked(Callable)}.
* <p>
* If the task does not have a result, use {@link #runLater(Runnable)} or
* {@link #runLaterChecked(CheckedRunnable)}.
*
* @param <T> The result type of the task
* @param workToEnqueue A {@link Supplier} to execute later, on the loading
* thread
* @return A {@link CompletableFuture} that completes at said time
*/
public static <T> CompletableFuture<T> getLater(Supplier<T> workToEnqueue) {
currentOwner.set(ModThreadContext.get().getActiveContainer());
return CompletableFuture.supplyAsync(workToEnqueue, deferredExecutor).exceptionally(DeferredWorkQueue.handleException());
}
/**
* Run a task computing a result on the loading thread at the next available
* opportunity, i.e. after the current lifecycle event has completed. This
* variant allows the task to throw a checked exception.
* <p>
* If the task does not throw a checked exception, use
* {@link #getLater(Callable)}.
* <p>
* If the task does not have a result, use {@link #runLater(Runnable)} or
* {@link #runLaterChecked(CheckedRunnable)}.
*
* @param <T> The result type of the task
* @param workToEnqueue A {@link Supplier} to execute later, on the loading
* thread
* @return A {@link CompletableFuture} that completes at said time
*/
public static <T> CompletableFuture<T> getLaterChecked(Callable<T> workToEnqueue) {
return getLater(() -> {
try {
return workToEnqueue.call();
} catch (Throwable t) {
throw new CompletionException(t);
}
});
}
static void clear() {
taskQueue.clear();
}
static void runTasks(ModLoadingStage fromStage, Consumer<List<ModLoadingException>> errorHandler) {
raisedExceptions.clear();
if (taskQueue.isEmpty()) return; // Don't log unnecessarily
LOGGER.info(LOADING, "Dispatching synchronous work after {}: {} jobs", fromStage, taskQueue.size());
StopWatch globalTimer = StopWatch.createStarted();
while (!taskQueue.isEmpty()) {
TaskInfo taskinfo = taskQueue.poll();
Stopwatch timer = Stopwatch.createStarted();
taskinfo.task.run();
timer.stop();
if (timer.elapsed(TimeUnit.SECONDS) >= 1) {
LOGGER.warn(LOADING, "Mod '{}' took {} to run a deferred task.", taskinfo.owner.getModId(), timer);
}
}
LOGGER.info(LOADING, "Synchronous work queue completed in {}", globalTimer);
errorHandler.accept(raisedExceptions);
}
}

6
src/main/java/net/minecraftforge/fml/ModList.java
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@ -91,7 +91,7 @@ public class ModList
public void dispatchLifeCycleEvent(LifecycleEventProvider.LifecycleEvent lifecycleEvent, final Consumer<List<ModLoadingException>> errorHandler) {
FMLLoader.getLanguageLoadingProvider().forEach(lp->lp.consumeLifecycleEvent(()->lifecycleEvent));
DeferredWorkQueue.deferredWorkQueue.clear();
DeferredWorkQueue.clear();
try
{
modLoadingThreadPool.submit(()->this.mods.parallelStream().forEach(m->m.transitionState(lifecycleEvent, errorHandler))).get();
@ -100,9 +100,7 @@ public class ModList
{
LOGGER.error(LOADING, "Encountered an exception during parallel processing", e);
}
LOGGER.debug(LOADING, "Dispatching synchronous work, {} jobs", DeferredWorkQueue.deferredWorkQueue.size());
DeferredWorkQueue.deferredWorkQueue.forEach(FutureTask::run);
LOGGER.debug(LOADING, "Synchronous work queue complete");
DeferredWorkQueue.runTasks(lifecycleEvent.fromStage(), errorHandler);
FMLLoader.getLanguageLoadingProvider().forEach(lp->lp.consumeLifecycleEvent(()->lifecycleEvent));
}

1
src/main/resources/assets/forge/lang/en_us.json
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@ -25,6 +25,7 @@
"fml.modloading.errorduringevent":"{0,modinfo,name} ({0,modinfo,id}) encountered an error during the {1,lower} event phase\n\u00a77{2,exc,msg}",
"fml.modloading.failedtoloadforge": "Failed to load forge",
"fml.modloading.missingdependency": "Mod \u00a7e{4}\u00a7r requires \u00a76{3}\u00a7r \u00a7o{5,vr}\u00a7r\n\u00a77Currently, \u00a76{3}\u00a7r\u00a77 is \u00a7o{6,i18n,fml.messages.artifactversion.ornotinstalled}",
"fml.modloading.failedtoprocesswork":"{0,modinfo,name} ({0,modinfo,id}) encountered an error processing deferred work\n\u00a77{2,exc,msg}",
"fml.messages.artifactversion.ornotinstalled":"{0,ornull,fml.messages.artifactversion.notinstalled}",
"fml.messages.artifactversion":"{0,ornull,fml.messages.artifactversion.none}",