net.dv8tion.jda.internal.requests.restaction.operator.FlatMapErrorRestAction Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of JDA Show documentation
Show all versions of JDA Show documentation
Java wrapper for the popular chat & VOIP service: Discord https://discord.com
/*
* 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.requests.restaction.operator;
import net.dv8tion.jda.api.exceptions.RateLimitedException;
import net.dv8tion.jda.api.requests.RestAction;
import net.dv8tion.jda.internal.utils.Helpers;
import org.jetbrains.annotations.Contract;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.concurrent.CompletableFuture;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
public class FlatMapErrorRestAction extends RestActionOperator
{
private final Predicate check;
private final Function> map;
public FlatMapErrorRestAction(RestAction action, Predicate check, Function> map)
{
super(action);
this.check = check;
this.map = map;
}
@Override
public void queue(@Nullable Consumer success, @Nullable Consumer failure)
{
Consumer contextFailure = contextWrap(failure);
action.queue(success, contextWrap((error) -> {
try
{
if (check.test(error))
{
// If check passed we can apply the fallback function and flatten it
RestAction then = map.apply(error);
if (then == null)
doFailure(failure, new IllegalStateException("FlatMapError operand is null", error)); // No contextFailure because error already has context
else
then.queue(success, contextFailure); // Use contextFailure here to apply new context to new errors
}
else doFailure(failure, error); // No contextFailure because error already has context
}
catch (Throwable e)
{
doFailure(failure, Helpers.appendCause(e, error)); // No contextFailure because error already has context
}
}));
}
@Override
public T complete(boolean shouldQueue) throws RateLimitedException
{
try
{
return action.complete(shouldQueue);
}
catch (Throwable error)
{
try
{
if (check.test(error))
{
RestAction then = map.apply(error);
if (then == null)
throw new IllegalStateException("FlatMapError operand is null", error);
return then.complete(shouldQueue);
}
}
catch (Throwable e)
{
if (e instanceof IllegalStateException && e.getCause() == error)
throw (IllegalStateException) e;
else if (e instanceof RateLimitedException)
throw (RateLimitedException) Helpers.appendCause(e, error);
else
fail(Helpers.appendCause(e, error));
}
fail(error);
}
throw new AssertionError("Unreachable");
}
@Nonnull
@Override
public CompletableFuture submit(boolean shouldQueue)
{
return action.submit(shouldQueue)
.handle((result, error) -> {
if (check.test(error))
return map.apply(error).submit(shouldQueue).thenApply(x -> (T) x);
else
return CompletableFuture.completedFuture(result);
}).thenCompose(Function.identity());
}
@Contract("_ -> fail")
private void fail(Throwable error)
{
if (error instanceof RuntimeException)
throw (RuntimeException) error;
else if (error instanceof Error)
throw (Error) error;
else
throw new RuntimeException(error);
}
}