/
GatewayTask.java
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/
GatewayTask.java
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/*
* Copyright 2015 Austin Keener, Michael Ritter, Florian Spieß, and the JDA contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.dv8tion.jda.internal.utils.concurrent.task;
import net.dv8tion.jda.api.exceptions.ContextException;
import net.dv8tion.jda.api.utils.concurrent.Task;
import net.dv8tion.jda.internal.requests.WebSocketClient;
import net.dv8tion.jda.internal.utils.Checks;
import net.dv8tion.jda.internal.utils.JDALogger;
import org.slf4j.Logger;
import javax.annotation.Nonnull;
import java.time.Duration;
import java.util.concurrent.CompletableFuture;
import java.util.function.Consumer;
import java.util.function.LongConsumer;
public class GatewayTask<T> implements Task<T>
{
private static final Logger log = JDALogger.getLog(Task.class);
private final Runnable onCancel;
private final CompletableFuture<T> future;
private LongConsumer setTimeout;
public GatewayTask(CompletableFuture<T> future, Runnable onCancel)
{
this.future = future;
this.onCancel = onCancel;
}
public GatewayTask<T> onSetTimeout(LongConsumer setTimeout)
{
this.setTimeout = setTimeout;
return this;
}
@Override
public boolean isStarted()
{
return true;
}
@Nonnull
@Override
public Task<T> onError(@Nonnull Consumer<? super Throwable> callback)
{
Checks.notNull(callback, "Callback");
Consumer<Throwable> failureHandler = ContextException.here((error) -> log.error("Task Failure callback threw error", error));
future.exceptionally(error -> {
try
{
callback.accept(error);
}
catch (Throwable e)
{
failureHandler.accept(e);
if (e instanceof Error)
throw e;
}
return null;
});
return this;
}
@Nonnull
@Override
public Task<T> onSuccess(@Nonnull Consumer<? super T> callback)
{
Checks.notNull(callback, "Callback");
Consumer<Throwable> failureHandler = ContextException.here((error) -> log.error("Task Success callback threw error", error));
future.thenAccept(result -> {
try
{
callback.accept(result);
}
catch (Throwable error)
{
failureHandler.accept(error);
if (error instanceof Error)
throw error;
}
});
return this;
}
@Nonnull
@Override
public Task<T> setTimeout(@Nonnull Duration timeout)
{
Checks.notNull(timeout, "Timeout");
long millis = timeout.toMillis();
Checks.positive(millis, "Timeout");
if (this.setTimeout != null)
this.setTimeout.accept(millis);
return this;
}
@Nonnull
@Override
public T get()
{
if (WebSocketClient.WS_THREAD.get())
throw new UnsupportedOperationException("Blocking operations are not permitted on the gateway thread");
return future.join();
}
@Override
public void cancel()
{
onCancel.run();
}
}