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diff --git a/vnftest/onap/runners/iteration.py b/vnftest/onap/runners/iteration.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/iteration.py
+
+"""A runner that runs a configurable number of times before it returns
+"""
+
+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__)
+
+
+QUEUE_PUT_TIMEOUT = 10
+
+
+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)
+ iterations = runner_cfg.get("iterations", 1)
+ run_step = runner_cfg.get("run_step", "setup,run,teardown")
+
+ delta = runner_cfg.get("delta", 2)
+ LOG.info("worker START, iterations %d times, class %s", iterations, cls)
+
+ runner_cfg['runner_id'] = os.getpid()
+
+ step = cls(step_cfg, context_cfg)
+ if "setup" in run_step:
+ step.setup()
+
+ method = getattr(step, method_name)
+
+ sla_action = None
+ if "sla" in step_cfg:
+ sla_action = step_cfg["sla"].get("action", "assert")
+ if "run" in run_step:
+ while True:
+
+ 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
+ elif sla_action == "rate-control":
+ try:
+ step_cfg['options']['rate']
+ except KeyError:
+ step_cfg.setdefault('options', {})
+ step_cfg['options']['rate'] = 100
+
+ step_cfg['options']['rate'] -= delta
+ sequence = 1
+ continue
+ except Exception:
+ errors = traceback.format_exc()
+ LOG.exception("")
+ else:
+ if result:
+ # add timeout for put so we don't block test
+ # if we do timeout we don't care about dropping individual KPIs
+ output_queue.put(result, True, QUEUE_PUT_TIMEOUT)
+
+ time.sleep(interval)
+
+ step_output = {
+ 'timestamp': time.time(),
+ 'sequence': sequence,
+ 'data': data,
+ 'errors': errors
+ }
+
+ queue.put(step_output, True, QUEUE_PUT_TIMEOUT)
+
+ 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 \
+ (sequence > iterations or aborted.is_set()):
+ LOG.info("worker END")
+ break
+ if "teardown" in run_step:
+ 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.debug("queue.qsize() = %s", queue.qsize())
+ LOG.debug("output_queue.qsize() = %s", output_queue.qsize())
+
+
+class IterationRunner(base.Runner):
+ """Run a step for a configurable number of times
+
+If the step ends before the time has elapsed, it will be started again.
+
+ Parameters
+ iterations - amount of times the step will be run for
+ type: int
+ unit: na
+ default: 1
+ interval - time to wait between each step invocation
+ type: int
+ unit: seconds
+ default: 1 sec
+ """
+ __execution_type__ = 'Iteration'
+
+ 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()