001package ca.uhn.fhir.util;
002
003/*
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2017 University Health Network
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import java.io.InputStream;
024import java.util.Properties;
025
026import org.apache.commons.io.IOUtils;
027
028/**
029 * Used internally by HAPI to log the version of the HAPI FHIR framework
030 * once, when the framework is first loaded by the classloader.
031 */
032public class VersionUtil {
033
034        private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(VersionUtil.class);
035        private static String ourVersion;
036
037        static {
038                initialize();
039        }
040
041        public static String getVersion() {
042                return ourVersion;
043        }
044
045        private static void initialize() {
046                InputStream is = null;
047                try {
048                        is = VersionUtil.class.getResourceAsStream("/ca/uhn/fhir/hapi-version.properties");
049                        Properties p = new Properties();
050                        p.load(is);
051                        ourVersion = p.getProperty("version");
052                        ourLog.info("HAPI FHIR version is: " + ourVersion);
053                } catch (Exception e) {
054                        ourLog.warn("Unable to determine HAPI version information", e);
055                } finally {
056                        IOUtils.closeQuietly(is);
057                }
058        }
059        
060}