com.ibm.mqlight.api.impl.logging.Version Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.ibm.mqlight.api.impl.logging;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Map.Entry;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
import com.ibm.mqlight.api.logging.Logger;
import com.ibm.mqlight.api.logging.LoggerFactory;
/**
* Provides information about the product version.
*/
public class Version {
private static final Class cclass = Version.class;
private static final Logger logger = LoggerFactory.getLogger(cclass);
/**
* obtains the MQ Light version information from the manifest.
*
* @return The MQ Light version.
*/
public static String getVersion() {
String version = "unknown";
final URLClassLoader cl = (URLClassLoader)cclass.getClassLoader();
try {
final URL url = cl.findResource("META-INF/MANIFEST.MF");
final Manifest manifest = new Manifest(url.openStream());
for (Entry entry : manifest.getMainAttributes().entrySet()) {
final Attributes.Name key = (Attributes.Name)entry.getKey();
if(Attributes.Name.IMPLEMENTATION_VERSION.equals(key)) {
version = (String)entry.getValue();
}
}
} catch (IOException e) {
logger.error("Unable to determine the product version due to error", e);
}
return version;
}
}