co.cask.cdap.etl.tool.ETLVersion Maven / Gradle / Ivy
/*
* Copyright © 2016 Cask Data, 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 co.cask.cdap.etl.tool;
import java.io.InputStream;
import java.util.Properties;
/**
* Utility to get etl app version.
*/
public final class ETLVersion {
private static String version;
private ETLVersion() {
}
// reads current version from the etl.properties file contained in resources.
public static String getVersion() {
if (version != null) {
return version;
}
Properties prop = new Properties();
try {
try (InputStream in = UpgradeTool.class.getResourceAsStream("/etl.properties")) {
prop.load(in);
}
version = prop.getProperty("version");
return version;
} catch (Exception e) {
throw new RuntimeException("Error determining version. Please check that the jar was built correctly.", e);
}
}
}