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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  import org.apache.commons.io.IOUtils;
27  
28  /**
29   * Used internally by HAPI to log the version of the HAPI FHIR framework
30   * once, when the framework is first loaded by the classloader.
31   */
32  public class VersionUtil {
33  
34  	private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(VersionUtil.class);
35  	private static String ourVersion;
36  
37  	static {
38  		initialize();
39  	}
40  
41  	public static String getVersion() {
42  		return ourVersion;
43  	}
44  
45  	private static void initialize() {
46  		InputStream is = null;
47  		try {
48  			is = VersionUtil.class.getResourceAsStream("/ca/uhn/fhir/hapi-version.properties");
49  			Properties p = new Properties();
50  			p.load(is);
51  			ourVersion = p.getProperty("version");
52  			ourLog.info("HAPI FHIR version is: " + ourVersion);
53  		} catch (Exception e) {
54  			ourLog.warn("Unable to determine HAPI version information", e);
55  		} finally {
56  			IOUtils.closeQuietly(is);
57  		}
58  	}
59  	
60  }