SONARPLUGINS-1023 Display total running time at the end of analysis

src/main/java/org/sonar/runner/Main.java

@@ -44,6 +44,7 @@ import java.util.Properties;
 public final class Main {
 
   public static void main(String[] args) {
+    long startTime = System.currentTimeMillis();
     try {
       Properties props = loadProperties(args);
       Runner runner = Runner.create(props);
@@ -56,15 +57,26 @@ public final class Main {
     } catch (IOException e) {
       throw new RuntimeException(e);
     } finally {
-      printMemoryUsage();
+      printStats(startTime);
     }
   }
 
-  private static final long MB = 1024 * 1024;
+  private static void printStats(long startTime) {
+    long time = System.currentTimeMillis() - startTime;
+    log("Total time: " + formatTime(time));
 
-  private static void printMemoryUsage() {
+    System.gc();
     Runtime r = Runtime.getRuntime();
-    log("Final Memory: " + (r.totalMemory() - r.freeMemory()) / MB + "M/" + r.totalMemory() / MB + "M");
+    long mb = 1024 * 1024;
+    log("Final Memory: " + (r.totalMemory() - r.freeMemory()) / mb + "M/" + r.totalMemory() / mb + "M");
+  }
+
+  static String formatTime(long time) {
+    long h = time / (60 * 60 * 1000);
+    long m = (time - h * 60 * 60 * 1000) / (60 * 1000);
+    long s = (time - h * 60 * 60 * 1000 - m * 60 * 1000) / 1000;
+    long ms = time % 1000;
+    return String.format("%1$d:%2$02d:%3$02d.%4$03ds", h, m, s, ms);
   }
 
   static Properties loadProperties(String[] args) {

src/test/java/org/sonar/runner/MainTest.java

@@ -100,4 +100,12 @@ public class MainTest {
     assertThat(props.getProperty("overridden.prop"), is("project scope"));
     assertThat(props.getProperty("global.prop"), is("jdbc:mysql:localhost/sonar"));
   }
+
+  @Test
+  public void shouldFormatTime() {
+    assertThat(Main.formatTime(1 * 60 * 60 * 1000 + 2 * 60 * 1000 + 3 * 1000 + 400), is("1:02:03.400s"));
+    assertThat(Main.formatTime(2 * 60 * 1000 + 3 * 1000 + 400), is("0:02:03.400s"));
+    assertThat(Main.formatTime(3 * 1000 + 400), is("0:00:03.400s"));
+    assertThat(Main.formatTime(400), is("0:00:00.400s"));
+  }
 }