X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FTrace.py;h=10a55ce140c31b6375ddd012f5b3fde0b65cb07c;hp=8168b909eaf82d86e721c89c91b14b115c0fdfbf;hb=67f247b4015b76641c6fab7c49e7d9862043c856;hpb=da8aebf2e722f2c441a03b300de71f9143d010a3

diff --git a/resources/libraries/python/Trace.py b/resources/libraries/python/Trace.py
index 8168b909ea..10a55ce140 100644
--- a/resources/libraries/python/Trace.py
+++ b/resources/libraries/python/Trace.py
@@ -11,14 +11,40 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from resources.libraries.python.VatExecutor import VatExecutor
+"""Packet trace library."""
+
+from resources.libraries.python.VatExecutor import VatExecutor, VatTerminal
 from resources.libraries.python.topology import NodeType
 
+
 class Trace(object):
+    """This class provides methods to manipulate the VPP packet trace."""
+
+    @staticmethod
+    def show_packet_trace_on_all_duts(nodes, maximum=None):
+        """Show VPP packet trace.
+
+        :param nodes: Nodes from which the packet trace will be displayed.
+        :param maximum: Maximum number of packet traces to be displayed.
+        :type nodes: list
+        :type maximum: int
+        """
+        maximum = "max {count}".format(count=maximum) if maximum is not None\
+            else ""
+        for node in nodes.values():
+            if node['type'] == NodeType.DUT:
+                with VatTerminal(node, json_param=False) as vat:
+                    vat.vat_terminal_exec_cmd_from_template(
+                        'show_trace.vat', maximum=maximum)
 
     @staticmethod
-    def show_packet_trace_on_all_duts(nodes):
+    def clear_packet_trace_on_all_duts(nodes):
+        """Clear VPP packet trace.
+
+        :param nodes: Nodes where the packet trace will be cleared.
+        :type nodes: list
+        """
         for node in nodes.values():
             if node['type'] == NodeType.DUT:
                 vat = VatExecutor()
-                vat.execute_script("show_trace.vat", node, json_out=False)
+                vat.execute_script("clear_trace.vat", node, json_out=False)