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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.utils.concurrent.Task;
import net.dv8tion.jda.internal.requests.WebSocketClient;
import net.dv8tion.jda.internal.utils.Checks;
import javax.annotation.Nonnull;
import java.util.concurrent.CompletableFuture;
import java.util.function.Consumer;
public class GatewayTask<T> implements Task<T>
{
private final Runnable onCancel;
private final CompletableFuture<T> future;
private Consumer<? super T> success;
private Consumer<? super Throwable> failure;
public GatewayTask(CompletableFuture<T> future, Runnable onCancel)
{
this.future = future;
this.onCancel = onCancel;
}
@Override
public boolean isStarted()
{
return true;
}
@Nonnull
@Override
public Task<T> onError(@Nonnull Consumer<? super Throwable> callback)
{
Checks.notNull(callback, "Callback");
future.exceptionally(error -> {
callback.accept(error);
return null;
});
return this;
}
@Nonnull
@Override
public Task<T> onSuccess(@Nonnull Consumer<? super T> callback)
{
Checks.notNull(callback, "Callback");
future.thenAccept(callback);
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();
}
}