Improved lengthy warning details messages when resource not found

Details:

* Improved the lengthy warning details messages when resources have not been
  found to a more condensed and useful format. (issue #473)

Signed-off-by: Andreas Maier <maiera@de.ibm.com>

docs/changes.rst

@@ -139,6 +139,9 @@ will also work with the prior version of the file (but not vice versa).
 * Disabled the use of Python builtins in the evaluation of 'fetch-condition' and
   'export-condition' in the metric definition file. (issue #463)
 
+* Improved the lengthy warning details messages when resources have not been
+  found to a more condensed and useful format. (issue #473)
+
 **Known issues:**
 
 * See `list of open issues`_.

zhmc_prometheus_exporter/zhmc_prometheus_exporter.py

@@ -966,19 +966,19 @@ def resource(self, uri, object_value):
                          format(uri, mgd.name))
                 for mgr in exc.managers:
                     res_class = mgr.class_name
-                    logprint(logging.WARNING, PRINT_ALWAYS,
+                    logprint(logging.WARNING, PRINT_VV,
                              "Warning details: List of {} resources found:".
                              format(res_class))
-                    res_dict = {}
-                    resources = mgr.list()
-                    for res in resources:
-                        res_dict[res.uri] = res
-                    logprint(logging.WARNING, PRINT_ALWAYS,
-                             repr(res_dict))
-                logprint(logging.WARNING, PRINT_ALWAYS,
+                    for res in mgr.list():
+                        logprint(logging.WARNING, PRINT_VV,
+                                 "Warning details: Resource found: {} ({})".
+                                 format(res.uri, res.name))
+                logprint(logging.WARNING, PRINT_VV,
                          "Warning details: Current resource cache:")
-                logprint(logging.WARNING, PRINT_ALWAYS,
-                         repr(self._resources))
+                for res in self._resources.values():
+                    logprint(logging.WARNING, PRINT_VV,
+                             "Warning details: Resource cache: {} ({})".
+                             format(res.uri, res.name))
                 raise
             self._resources[uri] = _resource
         return _resource