com.boxysystems.jgogleanalytics is now an optional dependency

diff --git a/src/jalview/bin/Cache.java b/src/jalview/bin/Cache.java
index ccd1393..1a22859 100755 (executable)
--- a/src/jalview/bin/Cache.java
+++ b/src/jalview/bin/Cache.java
@@ -23,9 +23,6 @@ import java.util.*;
 
 import org.apache.log4j.*;
 
-import com.boxysystems.jgoogleanalytics.FocusPoint;
-import com.boxysystems.jgoogleanalytics.JGoogleAnalyticsTracker;
-
 /**
  * Stores and retrieves Jalview Application Properties Lists and fields within
  * list entries are separated by '|' symbols unless otherwise stated (|) clauses
@@ -486,9 +483,11 @@ public class Cache
   }
 
   /**
-   * GA tracker object - null if tracking not enabled.
+   * GA tracker object - actually JGoogleAnalyticsTracker null if tracking not enabled.
    */
-  public static JGoogleAnalyticsTracker tracker = null;
+  protected static Object tracker = null;
+  protected static Class trackerfocus = null;
+  protected static Class jgoogleanalyticstracker = null;
 
   /**
    * Initialise the google tracker if it is not done already.
@@ -497,39 +496,96 @@ public class Cache
   {
     if (tracker == null)
     {
+      if (jgoogleanalyticstracker==null)
+      {
+        // try to get the tracker class
+        try {
+          jgoogleanalyticstracker = Cache.class.getClassLoader().loadClass(
+          "com.boxysystems.jgoogleanalytics.JGoogleAnalyticsTracker");
+          trackerfocus = Cache.class.getClassLoader().loadClass(
+          "com.boxysystems.jgoogleanalytics.FocusPoint");
+        } catch (Exception e)
+        {
+          log.debug("com.boxysystems.jgoogleanalytics package is not present - tracking not enabled.");
+          tracker = null;
+          jgoogleanalyticstracker=null;
+          trackerfocus=null;
+          return;
+        }
+      }
+      // now initialise tracker
+      Exception re = null, ex = null;
+      Error err = null;
       String vrs = "No Version Accessible";
       try
       {
         // Google analytics tracking code for Library Finder
-        tracker = new JGoogleAnalyticsTracker("Jalview Desktop",
+        tracker = jgoogleanalyticstracker.getConstructor(new Class[] { String.class,String.class,String.class}).newInstance(new Object[] { "Jalview Desktop",
                 (vrs = jalview.bin.Cache.getProperty("VERSION")
                         + "_"
                         + jalview.bin.Cache.getDefault("BUILD_DATE",
-                                "unknown")), "UA-9060947-1");
-        tracker.trackAsynchronously(new FocusPoint("Application Started."));
+                                "unknown")), "UA-9060947-1"});
+        jgoogleanalyticstracker.getMethod("trackAsynchronously", new Class[] { trackerfocus })
+        .invoke(tracker, new Object[] { trackerfocus.getConstructor(
+                new Class[] { String.class}).newInstance(new Object[] { "Application Started." })});
       } catch (RuntimeException e)
       {
-        if (log != null)
-        {
-          log.debug("Caught runtime exception in googletracker init:", e);
-        }
-        // quietly return.
+        re = e;
       } catch (Exception e)
       {
-        // unexpected error
+        ex = e;
+      } catch (Error e)
+      {
+        err = e;
+      }
+      if (re != null || ex != null || err != null)
+      {
         if (log != null)
         {
-          log.warn(
-                  "Failed to initialise GoogleTracker for Jalview Desktop with version "
-                          + vrs, e);
+          if (re != null)
+            log
+                    .debug(
+                            "Caught runtime exception in googletracker init:",
+                            re);
+          if (ex != null)
+            log.warn(
+                    "Failed to initialise GoogleTracker for Jalview Desktop with version "
+                            + vrs, ex);
+          if (err != null)
+            log.error(
+                    "Whilst initing GoogleTracker for Jalview Desktop version "
+                            + vrs, err);
         }
         else
         {
-          log.warn(
-                  "Failed to initialise GoogleTracker for Jalview Desktop with version "
-                          + vrs, e);
+          if (re != null)
+          {
+            System.err
+                    .println("Debug: Caught runtime exception in googletracker init:"
+                            + vrs);
+            re.printStackTrace();
+          }
+          if (ex != null)
+          {
+            System.err
+                    .println("Warning:  Failed to initialise GoogleTracker for Jalview Desktop with version "
+                            + vrs);
+            ex.printStackTrace();
+          }
+
+          if (err != null)
+          {
+            System.err
+                    .println("ERROR: Whilst initing GoogleTracker for Jalview Desktop version "
+                            + vrs);
+            err.printStackTrace();
+          }
         }
       }
+      else
+      {
+        log.debug("Successfully initialised tracker.");
+      }
     }
   }