storage_resource.py 文件源码

def dehydrate_stats(self, bundle):
        from chroma_core.models import SimpleHistoStoreTime
        from chroma_core.models import SimpleHistoStoreBin
        stats = {}
        for s in StorageResourceStatistic.objects.filter(storage_resource = bundle.obj):
            from django.db import transaction
            stat_props = s.storage_resource.get_statistic_properties(s.name)
            if isinstance(stat_props, statistics.BytesHistogram):
                with transaction.commit_manually():
                    transaction.commit()
                    try:
                        time = SimpleHistoStoreTime.objects.filter(storage_resource_statistic = s).latest('time')
                        bins = SimpleHistoStoreBin.objects.filter(histo_store_time = time).order_by('bin_idx')
                    finally:
                        transaction.commit()
                type_name = 'histogram'
                # Composite type
                data = {
                    'bin_labels': [u'\u2264%s' % (bin[1:] or '') for bin in stat_props.bins],
                    'values': [bin.value for bin in bins],
                }
            else:
                type_name = 'timeseries'
                # Go get the data from <resource>/metrics/
                data = None

            label = stat_props.label
            if not label:
                label = s.name

            stat_data = {'name': s.name,
                         'label': label,
                         'type': type_name,
                         'unit_name': stat_props.get_unit_name(),
                         'data': data}
            stats[s.name] = stat_data

        return stats