001package ca.uhn.fhir.util;
002
003/*
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2018 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
026/**
027 * Used internally by HAPI to log the version of the HAPI FHIR framework
028 * once, when the framework is first loaded by the classloader.
029 */
030public class VersionUtil {
031
032        private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(VersionUtil.class);
033        private static String ourVersion;
034
035        static {
036                initialize();
037        }
038
039        public static String getVersion() {
040                return ourVersion;
041        }
042
043        private static void initialize() {
044                try (InputStream is = VersionUtil.class.getResourceAsStream("/ca/uhn/fhir/hapi-version.properties")) {
045                        Properties p = new Properties();
046                        p.load(is);
047                        ourVersion = p.getProperty("version");
048                        ourLog.info("HAPI FHIR version is: " + ourVersion);
049                } catch (Exception e) {
050                        ourLog.warn("Unable to determine HAPI version information", e);
051                }
052        }
053        
054}