JDK detection algorithm improvements and small tweaks

- Improve JDK detection algorithm (fix #55, #56, #63, #65)
- Change statistics endpoint to a new one
- Remove unused code

core/usages.py

@@ -68,11 +68,6 @@ def send_packages_usages(self):
         if Settings().get("send_stats_and_usages"):
             params = self.get_usages_data()
             params["package"] = "true"
-            # Downloader.request(
-            #     Constant.get_usages_host(),
-            #     params,
-            #     on_complete=self.on_usages_sent
-            # )
 
 
 def Usages():

threads/jdk_manager.py

@@ -58,8 +58,44 @@ def get_jdk_version(cls, path=None, executable=None):
                 return version
         return None
 
-    @classmethod
-    def get_java_home(cls, path=None):
+    def is_java_home_path(self, path):
+        """
+        Check whether the specified path is contains all Java runtime files
+
+        @param path: a directory path
+        """
+        required_files = set([
+            file
+            for files in
+            Settings().get("java_runtime_files").values()
+            for file in files
+        ])
+
+        existing_files = (
+            name
+            for name in os.listdir(path)
+            if os.path.isfile(os.path.join(path, name))
+        )
+        return required_files.issubset(existing_files)
+
+    def find_java_home(self, path):
+        """
+        Find all subfolder of specified path and return the path if it contains
+            all Java runtime files
+
+        @param path: a path to find
+        """
+        for name in os.listdir(path):
+            path_name = os.path.join(path, name)
+            if os.path.isdir(path_name):
+                if self.is_java_home_path(path_name):
+                    return os.path.dirname(path_name)
+                java_home = self.find_java_home(path_name)
+                if java_home:
+                    return java_home
+        return None
+
+    def get_java_home(self, path=None):
         """
         Returns the Java home directory
 
@@ -81,6 +117,9 @@ def get_java_home(cls, path=None):
         ))
         if output["data"] and os.path.exists(output["data"]):
             return output["data"]
+        if path:
+            # Move one level up, so we ends up on the JDK root directory
+            return self.find_java_home(os.path.dirname(path))
         return None
 
     def is_jdk_path(self, path):

utils/constant.py

@@ -25,15 +25,15 @@ class Constant:
 
     @staticmethod
     def get_version():
-        return "2.0.0-prebeta.5"
+        return "2.0.0-prebeta.6"
 
     @staticmethod
     def get_usages_schema_version():
         return "2.0"
 
     @staticmethod
     def get_usages_host():
-        return "http://javatar.digitalparticle.com/"
+        return "http://api.digitalparticle.com/1/stats/"
 
     @staticmethod
     def get_packages_schema_version():