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diff --git a/vnftest/onap/runners/sequence.py b/vnftest/onap/runners/sequence.py
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+##############################################################################
+# Copyright 2018 EuropeanSoftwareMarketingLtd.
+# ===================================================================
+# Licensed under the ApacheLicense, Version2.0 (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
+#
+# 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
+##############################################################################
+# vnftest comment: this is a modified copy of
+# rally/rally/benchmark/runners/sequence.py
+
+"""A runner that every run changes a specified input value to the step.
+The input value in the sequence is specified in a list in the input file.
+"""
+
+from __future__ import absolute_import
+
+import logging
+import multiprocessing
+import time
+import traceback
+
+import os
+
+from vnftest.onap.runners import base
+
+LOG = logging.getLogger(__name__)
+
+
+def _worker_process(queue, cls, method_name, step_cfg,
+ context_cfg, aborted, output_queue):
+
+ sequence = 1
+
+ runner_cfg = step_cfg['runner']
+
+ interval = runner_cfg.get("interval", 1)
+ arg_name = runner_cfg.get('step_option_name')
+ sequence_values = runner_cfg.get('sequence')
+
+ if 'options' not in step_cfg:
+ step_cfg['options'] = {}
+
+ options = step_cfg['options']
+
+ runner_cfg['runner_id'] = os.getpid()
+
+ LOG.info("worker START, sequence_values(%s, %s), class %s",
+ arg_name, sequence_values, cls)
+
+ step = cls(step_cfg, context_cfg)
+ step.setup()
+ method = getattr(step, method_name)
+
+ sla_action = None
+ if "sla" in step_cfg:
+ sla_action = step_cfg["sla"].get("action", "assert")
+
+ for value in sequence_values:
+ options[arg_name] = value
+
+ LOG.debug("runner=%(runner)s seq=%(sequence)s START",
+ {"runner": runner_cfg["runner_id"], "sequence": sequence})
+
+ data = {}
+ errors = ""
+
+ try:
+ result = method(data)
+ except AssertionError as assertion:
+ # SLA validation failed in step, determine what to do now
+ if sla_action == "assert":
+ raise
+ elif sla_action == "monitor":
+ LOG.warning("SLA validation failed: %s", assertion.args)
+ errors = assertion.args
+ except Exception as e:
+ errors = traceback.format_exc()
+ LOG.exception(e)
+ else:
+ if result:
+ output_queue.put(result)
+
+ time.sleep(interval)
+
+ step_output = {
+ 'timestamp': time.time(),
+ 'sequence': sequence,
+ 'data': data,
+ 'errors': errors
+ }
+
+ queue.put(step_output)
+
+ LOG.debug("runner=%(runner)s seq=%(sequence)s END",
+ {"runner": runner_cfg["runner_id"], "sequence": sequence})
+
+ sequence += 1
+
+ if (errors and sla_action is None) or aborted.is_set():
+ break
+
+ try:
+ step.teardown()
+ except Exception:
+ # catch any exception in teardown and convert to simple exception
+ # never pass exceptions back to multiprocessing, because some exceptions can
+ # be unpicklable
+ # https://bugs.python.org/issue9400
+ LOG.exception("")
+ raise SystemExit(1)
+ LOG.info("worker END")
+ LOG.debug("queue.qsize() = %s", queue.qsize())
+ LOG.debug("output_queue.qsize() = %s", output_queue.qsize())
+
+
+class SequenceRunner(base.Runner):
+ """Run a step by changing an input value defined in a list
+
+ Parameters
+ interval - time to wait between each step invocation
+ type: int
+ unit: seconds
+ default: 1 sec
+ step_option_name - name of the option that is increased each invocation
+ type: string
+ unit: na
+ default: none
+ sequence - list of values which are executed in their respective steps
+ type: [int]
+ unit: na
+ default: none
+ """
+
+ __execution_type__ = 'Sequence'
+
+ def _run_step(self, cls, method, step_cfg, context_cfg):
+ name = "{}-{}-{}".format(self.__execution_type__, step_cfg.get("type"), os.getpid())
+ self.process = multiprocessing.Process(
+ name=name,
+ target=_worker_process,
+ args=(self.result_queue, cls, method, step_cfg,
+ context_cfg, self.aborted, self.output_queue))
+ self.process.start()