from pyutilib.component.core import (Interface, ExtensionPoint, implements,
                                     Plugin, PluginGlobals, SingletonPlugin)
import pyutilib.component.loader
import threading

print '[interfaces] %s' % threading.current_thread()

PluginGlobals.push_env('microdrop.managed')
PluginGlobals.pop_env()


PluginGlobals.push_env('microdrop')


if 'IFoo' in PluginGlobals.interface_registry:
    IFoo = PluginGlobals.interface_registry['IFoo']
else:
    class IFoo(Interface):
        pass


if 'ILoggingPlugin' in PluginGlobals.interface_registry:
    ILoggingPlugin = PluginGlobals.interface_registry['ILoggingPlugin']
else:
    class ILoggingPlugin(Interface):
        def on_debug(self, record):
            pass

        def on_info(self, record):
            pass

        def on_warning(self, record):
            pass

        def on_error(self, record):
            pass

        def on_critical(self, record):
            pass


if 'IWaveformGenerator' in PluginGlobals.interface_registry:
    IWaveformGenerator = PluginGlobals.interface_registry['IWaveformGenerator']
else:
    class IWaveformGenerator(Interface):
        def set_voltage(self, voltage):
            """
            Set the waveform voltage.

            Parameters:
                voltage : RMS voltage
            """
            pass

        def set_frequency(self, frequency):
            """
            Set the waveform frequency.

            Parameters:
                frequency : frequency in Hz
            """
            pass


if 'IPlugin' in PluginGlobals.interface_registry:
    IPlugin = PluginGlobals.interface_registry['IPlugin']
else:
    class IPlugin(Interface):
        def get_schedule_requests(self, function_name):
            """
            Returns a list of scheduling requests (i.e., ScheduleRequest
            instances) for the function specified by function_name.
            """
            return []

        def on_plugin_disable(self):
            """
            Handler called once the plugin instance is disabled.
            """
            pass

        def on_plugin_enable(self):
            """
            Handler called once the plugin instance is enabled.

            Note: if you inherit your plugin from AppDataController and don't
            implement this handler, by default, it will automatically load all
            app options from the config file. If you decide to overide the
            default handler, you should call:

                AppDataController.on_plugin_enable(self)

            to retain this functionality.
            """
            pass

        def on_plugin_enabled(self, env, plugin):
            """
            Handler called to notify that a plugin has been enabled.

            Note that this signal is broadcast to all plugins
            implementing the IPlugin interface, whereas the
            on_plugin_enable method is called directly on the plugin
            that is being enabled.
            """
            pass

        def on_plugin_disabled(self, env, plugin):
            """
            Handler called to notify that a plugin has been disabled.

            Note that this signal is broadcast to all plugins
            implementing the IPlugin interface, whereas the
            on_plugin_disable method is called directly on the plugin
            that is being disabled.
            """
            pass

        def on_app_exit(self):
            """
            Handler called just before the Microdrop application exits.
            """
            pass

        def on_protocol_swapped(self, old_protocol, protocol):
            """
            Handler called when a different protocol is swapped in (e.g., when
            a protocol is loaded or a new protocol is created).
            """
            pass

        def on_protocol_changed(self):
            """
            Handler called when a protocol is modified.
            """
            pass

        def on_protocol_run(self):
            """
            Handler called when a protocol starts running.
            """
            pass

        def on_protocol_pause(self):
            """
            Handler called when a protocol is paused.
            """
            pass

        def on_dmf_device_swapped(self, old_dmf_device, dmf_device):
            """
            Handler called when a different DMF device is swapped in (e.g., when
            a new device is loaded).
            """
            pass

        def on_dmf_device_changed(self):
            """
            Handler called when a DMF device is modified (e.g., channel
            assignment, scaling, etc.). This signal is also sent when a new
            device is imported or loaded from outside of the main device
            directory.
            """
            pass

        def on_experiment_log_changed(self, experiment_log):
            """
            Handler called when the current experiment log changes (e.g., when a
            protocol finishes running.
            """
            pass

        def on_experiment_log_selection_changed(self, data):
            """
            Handler called whenever the experiment log selection changes.

            Parameters:
                data : experiment log data (list of dictionaries, one per step)
                    for the selected steps
            """
            pass

        def on_app_options_changed(self, plugin_name):
            """
            Handler called when the app options are changed for a particular
            plugin.  This will, for example, allow for GUI elements to be
            updated.

            Parameters:
                plugin : plugin name for which the app options changed
            """
            pass

        def on_step_options_changed(self, plugin, step_number):
            """
            Handler called when the step options are changed for a particular
            plugin.  This will, for example, allow for GUI elements to be
            updated based on step specified.

            Parameters:
                plugin : plugin instance for which the step options changed
                step_number : step number that the options changed for
            """
            pass

        def on_step_options_swapped(self, plugin, old_step_number, step_number):
            """
            Handler called when the step options are changed for a particular
            plugin.  This will, for example, allow for GUI elements to be
            updated based on step specified.

            Parameters:
                plugin : plugin instance for which the step options changed
                step_number : step number that the options changed for
            """
            pass

        def on_step_swapped(self, old_step_number, step_number):
            """
            Handler called when the current step is swapped.
            """
            pass

        def on_step_run(self):
            """
            Handler called whenever a step is executed. Note that this signal
            is only emitted in realtime mode or if a protocol is running.

            Plugins that handle this signal must emit the on_step_complete
            signal once they have completed the step. The protocol controller
            will wait until all plugins have completed the current step before
            proceeding.

            return_value can be one of:
                None
                'Repeat' - repeat the step
                or 'Fail' - unrecoverable error (stop the protocol)
            """
            pass

        def on_step_complete(self, plugin_name, return_value=None):
            """
            Handler called whenever a plugin completes a step.

            return_value can be one of:
                None
                'Repeat' - repeat the step
                or 'Fail' - unrecoverable error (stop the protocol)
            """
            pass

        def on_step_created(self, step_number):
            pass

        def get_step_form_class(self):
            pass

        def get_step_values(self, step_number=None):
            pass

        def on_metadata_changed(self, original_metadata, metadata):
            '''
            Handler called each time the experiment metadata has changed.
            '''
            pass

@@ -8165,16 +8165,24 @@
 ed(self,
+ schema,
  origina

Update reference on_metadata_changed signature