com.alibaba.nacos.common.utils.VersionUtils Maven / Gradle / Ivy
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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.alibaba.nacos.common.utils;
import java.io.InputStream;
import java.util.Comparator;
import java.util.Objects;
import java.util.Properties;
/**
* Version utils.
*
* @author xingxuechao on:2019/2/27 12:32 PM
*/
public class VersionUtils {
private VersionUtils() {
}
public static String version;
private static String clientVersion;
/**
* current version.
*/
public static final String VERSION_PLACEHOLDER = "${project.version}";
private static final String NACOS_VERSION_FILE = "nacos-version.txt";
static {
try (InputStream in = VersionUtils.class.getClassLoader().getResourceAsStream(NACOS_VERSION_FILE)) {
Properties props = new Properties();
props.load(in);
String val = props.getProperty("version");
if (val != null && !VERSION_PLACEHOLDER.equals(val)) {
version = val;
clientVersion = "Nacos-Java-Client:v" + VersionUtils.version;
}
} catch (Exception e) {
e.printStackTrace();
}
}
private static final Comparator STRING_COMPARATOR = String::compareTo;
/**
* compare two version who is latest.
*
* @param versionA version A, like x.y.z(-beta)
* @param versionB version B, like x.y.z(-beta)
* @return compare result
*/
public static int compareVersion(final String versionA, final String versionB) {
final String[] sA = versionA.split("\\.");
final String[] sB = versionB.split("\\.");
int expectSize = 3;
if (sA.length != expectSize || sB.length != expectSize) {
throw new IllegalArgumentException("version must be like x.y.z(-beta)");
}
int first = Objects.compare(sA[0], sB[0], STRING_COMPARATOR);
if (first != 0) {
return first;
}
int second = Objects.compare(sA[1], sB[1], STRING_COMPARATOR);
if (second != 0) {
return second;
}
return Objects.compare(sA[2].split("-")[0], sB[2].split("-")[0], STRING_COMPARATOR);
}
public static String getFullClientVersion() {
return clientVersion;
}
}