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1   package ca.uhn.fhir.util;
2   
3   /*
4    * #%L
5    * HAPI FHIR - Core Library
6    * %%
7    * Copyright (C) 2014 - 2018 University Health Network
8    * %%
9    * Licensed under the Apache License, Version 2.0 (the "License");
10   * you may not use this file except in compliance with the License.
11   * You may obtain a copy of the License at
12   * 
13   *      http://www.apache.org/licenses/LICENSE-2.0
14   * 
15   * Unless required by applicable law or agreed to in writing, software
16   * distributed under the License is distributed on an "AS IS" BASIS,
17   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18   * See the License for the specific language governing permissions and
19   * limitations under the License.
20   * #L%
21   */
22  
23  import java.io.InputStream;
24  import java.util.Properties;
25  
26  /**
27   * Used internally by HAPI to log the version of the HAPI FHIR framework
28   * once, when the framework is first loaded by the classloader.
29   */
30  public class VersionUtil {
31  
32  	private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(VersionUtil.class);
33  	private static String ourVersion;
34  
35  	static {
36  		initialize();
37  	}
38  
39  	public static String getVersion() {
40  		return ourVersion;
41  	}
42  
43  	private static void initialize() {
44  		try (InputStream is = VersionUtil.class.getResourceAsStream("/ca/uhn/fhir/hapi-version.properties")) {
45  			Properties p = new Properties();
46  			p.load(is);
47  			ourVersion = p.getProperty("version");
48  			ourLog.info("HAPI FHIR version is: " + ourVersion);
49  		} catch (Exception e) {
50  			ourLog.warn("Unable to determine HAPI version information", e);
51  		}
52  	}
53  	
54  }