content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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 io.activej.crdt.storage.cluster;
  
  import io.activej.async.function.AsyncRunnable;
  import io.activej.async.function.AsyncRunnables;
  import io.activej.jmx.api.attribute.JmxAttribute;
  import io.activej.promise.Promise;
  import io.activej.promise.jmx.PromiseStats;
  import io.activej.reactor.AbstractReactive;
  import io.activej.reactor.Reactor;
  import io.activej.reactor.jmx.ReactiveJmxBeanWithStats;
  
  import java.time.Duration;
  
  import static io.activej.reactor.Reactive.checkInReactorThread;
  
  public final class CrdtRepartitionController<K extends Comparable<K>, S, P> extends AbstractReactive
  	implements ReactiveJmxBeanWithStats {
  
  	private final P localPartitionId;
  	private final ClusterCrdtStorage<K, S, P> cluster;
  
  	private final AsyncRunnable repartition = AsyncRunnables.reuse(this::doRepartition);
  
  	private CrdtRepartitionController(Reactor reactor, ClusterCrdtStorage<K, S, P> cluster, P localPartitionId) {
  		super(reactor);
  		this.cluster = cluster;
  		this.localPartitionId = localPartitionId;
  	}
  
  	public static <K extends Comparable<K>, S, P> CrdtRepartitionController<K, S, P> create(
  		Reactor reactor, ClusterCrdtStorage<K, S, P> cluster, P localPartitionId
  	) {
  		return new CrdtRepartitionController<>(reactor, cluster, localPartitionId);
  	}
  
  	private final PromiseStats repartitionPromise = PromiseStats.create(Duration.ofMinutes(5));
  
  	public Promise<Void> repartition() {
  		checkInReactorThread(this);
  		return repartition.run();
  	}
  
  	private Promise<Void> doRepartition() {
  		return cluster.repartition(localPartitionId)
  			.whenComplete(repartitionPromise.recordStats());
  	}
  
  	@JmxAttribute
  	public PromiseStats getRepartitionPromise() {
  		return repartitionPromise;
  	}
  }
  