Add km module kafka gateway

tests/kafkatest/services/trogdor/round_trip_workload.py

@@ -0,0 +1,49 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from ducktape.services.service import Service
+from kafkatest.services.trogdor.task_spec import TaskSpec
+
+
+class RoundTripWorkloadSpec(TaskSpec):
+    def __init__(self, start_ms, duration_ms, client_node, bootstrap_servers,
+                 target_messages_per_sec, max_messages, active_topics):
+        super(RoundTripWorkloadSpec, self).__init__(start_ms, duration_ms)
+        self.message["class"] = "org.apache.kafka.trogdor.workload.RoundTripWorkloadSpec"
+        self.message["clientNode"] = client_node
+        self.message["bootstrapServers"] = bootstrap_servers
+        self.message["targetMessagesPerSec"] = target_messages_per_sec
+        self.message["maxMessages"] = max_messages
+        self.message["activeTopics"] = active_topics
+
+
+class RoundTripWorkloadService(Service):
+    def __init__(self, context, kafka):
+        Service.__init__(self, context, num_nodes=1)
+        self.bootstrap_servers = kafka.bootstrap_servers(validate=False)
+        self.client_node = self.nodes[0].account.hostname
+
+    def free(self):
+        Service.free(self)
+
+    def wait_node(self, node, timeout_sec=None):
+        pass
+
+    def stop_node(self, node):
+        pass
+
+    def clean_node(self, node):
+        pass