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RateLimiter.java
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/
RateLimiter.java
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/*
* Copyright 2015-2017 Austin Keener & Michael Ritter
*
* 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.core.requests;
import com.mashape.unirest.http.HttpResponse;
import net.dv8tion.jda.core.entities.impl.JDAImpl;
import net.dv8tion.jda.core.requests.Route.CompiledRoute;
import net.dv8tion.jda.core.requests.ratelimit.IBucket;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
public abstract class RateLimiter
{
//Implementations of this class exist in the net.dv8tion.jda.core.requests.ratelimit package.
protected final Requester requester;
protected final ScheduledExecutorService pool;
protected volatile boolean isShutdown;
protected volatile ConcurrentHashMap<String, IBucket> buckets = new ConcurrentHashMap<>();
protected volatile ConcurrentLinkedQueue<IBucket> submittedBuckets = new ConcurrentLinkedQueue<>();
protected RateLimiter(Requester requester, int poolSize)
{
this.requester = requester;
this.isShutdown = false;
this.pool = Executors.newScheduledThreadPool(poolSize, new RateLimitThreadFactory(requester.getJDA()));
}
// -- Required Implementations --
public abstract Long getRateLimit(CompiledRoute route);
protected abstract void queueRequest(Request request);
protected abstract Long handleResponse(CompiledRoute route, HttpResponse<String> response);
// --- Default Implementations --
public boolean isRateLimited(CompiledRoute route)
{
return getRateLimit(route) != null;
}
public List<IBucket> getRouteBuckets()
{
synchronized (buckets)
{
return Collections.unmodifiableList(new ArrayList<>(buckets.values()));
}
}
public List<IBucket> getQueuedRouteBuckets()
{
synchronized (submittedBuckets)
{
return Collections.unmodifiableList(new ArrayList<>(submittedBuckets));
}
}
protected void shutdown()
{
isShutdown = true;
pool.shutdownNow();
}
private class RateLimitThreadFactory implements ThreadFactory
{
final String identifier;
AtomicInteger threadCount = new AtomicInteger(1);
public RateLimitThreadFactory(JDAImpl api)
{
identifier = api.getIdentifierString() + " RateLimit-Queue Pool";
}
@Override
public Thread newThread(Runnable r)
{
Thread t = new Thread(r, identifier + " - Thread " + threadCount.getAndIncrement());
t.setDaemon(true);
return t;
}
}
}