From 2f0e0792fa0db960407242d0f00641fe3cba2b52 Mon Sep 17 00:00:00 2001
From: Dexter Fryar <dexter.fryar@outlook.com>
Date: Wed, 18 Mar 2015 23:43:44 +0000
Subject: [PATCH] Added version information to jar which can be used on the
 command line e.g. java -jar monasca-thresh.jar --version

Change-Id: If1b6dc46ddac063d78b956fa43372cc4d30787fc
---
 thresh/pom.xml                                | 17 ++++++++++++++++
 .../monasca/thresh/ThresholdingEngine.java    | 20 +++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/thresh/pom.xml b/thresh/pom.xml
index b8d6268..acdaf8b 100644
--- a/thresh/pom.xml
+++ b/thresh/pom.xml
@@ -21,6 +21,8 @@
         <skipITs>false</skipITs>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <timestamp>${maven.build.timestamp}</timestamp>
+        <maven.build.timestamp.format>yyyy-MM-dd'T'HH:mm:ss</maven.build.timestamp.format>
         <artifactNamedVersion>${project.artifactId}-${project.version}-${timestamp}-${buildNumber}
         </artifactNamedVersion>
         <shadedJarName>${project.artifactId}-${project.version}-shaded
@@ -200,6 +202,21 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>2.4</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <packageName>monasca.thresh</packageName>
+                        </manifest>
+                        <manifestEntries>
+                            <Implementation-Version>${artifactNamedVersion}</Implementation-Version>
+                        </manifestEntries>
+                    </archive>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
diff --git a/thresh/src/main/java/monasca/thresh/ThresholdingEngine.java b/thresh/src/main/java/monasca/thresh/ThresholdingEngine.java
index 1defe27..8095014 100644
--- a/thresh/src/main/java/monasca/thresh/ThresholdingEngine.java
+++ b/thresh/src/main/java/monasca/thresh/ThresholdingEngine.java
@@ -59,8 +59,20 @@ public class ThresholdingEngine {
 
   public static void main(String... args) throws Exception {
 
+    /*
+     * This should allow command line options to show the current version java
+     * -jar monasca-thresh.jar --version java -jar monasca-thresh.jar -version
+     * java -jar monasca-thresh.jar version Really anything with the word
+     * version in it will show the version as long as there is only one argument
+     */
+    if (args.length == 1 && args[0].toLowerCase().contains("version")) {
+      showVersion();
+      System.exit(0);
+    }
+
     // Let's show the logging status.
     StatusPrinter.print((LoggerContext) LoggerFactory.getILoggerFactory());
+    showVersion();
 
     if (args.length < 2) {
       logger.error("Expected configuration file name and topology name arguments");
@@ -76,6 +88,14 @@ public class ThresholdingEngine {
     engine.run();
   }
 
+  private static void showVersion() {
+    Package pkg;
+    pkg = Package.getPackage("monasca.thresh");
+
+    logger.info("-------- Version Information --------");
+    logger.info("{}", pkg.getImplementationVersion());
+  }
+
   protected void configure() {
     Injector.registerModules(new TopologyModule(threshConfig));
   }