com.arangodb.shaded.vertx.core.spi.cluster.impl.selector.SimpleRoundRobinSelector Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2020 Contributors to the Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
* which is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
*/
package com.arangodb.shaded.vertx.core.spi.cluster.impl.selector;
import java.util.Collections;
import java.util.List;
/**
* @author Thomas Segismont
*/
class SimpleRoundRobinSelector implements RoundRobinSelector {
private final List nodeIds;
private final Index index;
SimpleRoundRobinSelector(List nodeIds) {
if (nodeIds.size() > 1) {
this.nodeIds = Collections.unmodifiableList(nodeIds);
index = new Index(nodeIds.size());
} else {
this.nodeIds = Collections.singletonList(nodeIds.get(0));
index = null;
}
}
@Override
public String selectForSend() {
if (index == null) return nodeIds.get(0);
return nodeIds.get(index.nextVal());
}
@Override
public Iterable selectForPublish() {
return nodeIds;
}
}