com.datastax.oss.driver.api.testinfra.loadbalancing.NodeComparator Maven / Gradle / Ivy
/*
* Copyright DataStax, Inc.
*
* 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 com.datastax.oss.driver.api.testinfra.loadbalancing;
import com.datastax.oss.driver.api.core.metadata.Node;
import com.datastax.oss.driver.shaded.guava.common.primitives.UnsignedBytes;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.Comparator;
public final class NodeComparator implements Comparator {
public static final NodeComparator INSTANCE = new NodeComparator();
private static final byte[] EMPTY = {};
private NodeComparator() {}
@Override
public int compare(Node node1, Node node2) {
// compare address bytes, byte by byte.
byte[] address1 =
node1
.getBroadcastAddress()
.map(InetSocketAddress::getAddress)
.map(InetAddress::getAddress)
.orElse(EMPTY);
byte[] address2 =
node2
.getBroadcastAddress()
.map(InetSocketAddress::getAddress)
.map(InetAddress::getAddress)
.orElse(EMPTY);
int result = UnsignedBytes.lexicographicalComparator().compare(address1, address2);
if (result != 0) {
return result;
}
int port1 = node1.getBroadcastAddress().map(InetSocketAddress::getPort).orElse(0);
int port2 = node2.getBroadcastAddress().map(InetSocketAddress::getPort).orElse(0);
return port1 - port2;
}
}