How to define a Timer with JSON

[RedAtman]

Thank you very much for sharing this module.

I tried to define a timer using JSON, and there is an example in the reference document（ https://github.com/jruizgit/rules/blob/master/docs/json/reference.md#timers ）, but received an error message at runtime.

Error:

Traceback (most recent call last):
  File "/Users/nut/ruler/durable_rules/testpy/Dynamic JSON object rules documentation.py", line 65, in <module>
    host.set_rulesets(rulesets)
  File "/Users/nut/.pyenv/versions/durable_rules/lib/python3.6/site-packages/durable/engine.py", line 778, in set_rulesets
    self.register_rulesets(ruleset_definitions)
  File "/Users/nut/.pyenv/versions/durable_rules/lib/python3.6/site-packages/durable/engine.py", line 887, in register_rulesets
    rulesets = Ruleset.create_rulesets(self, ruleset_definitions)
  File "/Users/nut/.pyenv/versions/durable_rules/lib/python3.6/site-packages/durable/engine.py", line 444, in create_rulesets
    branches[name] = Ruleset(name, host, definition)
  File "/Users/nut/.pyenv/versions/durable_rules/lib/python3.6/site-packages/durable/engine.py", line 317, in __init__
    self._actions[rule_name] = Promise(host.get_action(action))
  File "/Users/nut/.pyenv/versions/durable_rules/lib/python3.6/site-packages/durable/engine.py", line 761, in get_action
    raise Exception('Action with name {0} not found'.format(action_name))
Exception: Action with name restartTimer not found

Example:

from durable.lang import *

rulesets = {
    "timer": {
        "r_0": {
            "any": [
               {
                   "m_0$all": [
                       {
                           "m_0.m": {
                               "$and": [
                                   {
                                       "count": 0
                                   },
                                   {
                                       "$s": 1
                                   }
                               ]
                           }
                       }
                   ]
               },
                {
                   "m_1$all": [
                       {
                           "m_1.m_0": {
                               "$and": [
                                   {
                                       "$lt": {
                                           "count": 5
                                       }
                                   },
                                   {
                                       "$s": 1
                                   }
                               ]
                           }
                       },
                       {
                           "m_1.m_1": {
                               "$t": "MyTimer"
                           }
                       }
                   ]
               }
            ],
            "run": "restartTimer"
        },
        "r_1": {
            "all": [
                {
                    "m": {
                        "cancel": True
                    }
                }
            ],
            "run": "cancelTimer"
        }
    }
}

host = get_host()

host.set_rulesets(rulesets)

post('timer', {'t': 'deposit', 'count': 0, "$s": 1});
post('timer', {'t': 'withrawal', 'count': 1, "$s": 1});
post('timer', {'t': 'chargeback', 'count': 1});