perf: 补回get_terminal_latest_stat 方法

apps/terminal/models/component/status.py

@@ -1,11 +1,12 @@
 import uuid
 
+from django.core.cache import cache
 from django.db import models
+from django.forms.models import model_to_dict
 from django.utils.translation import ugettext_lazy as _
 
 from common.utils import get_logger
 
-
 logger = get_logger(__name__)
 
 
@@ -21,9 +22,44 @@ class Status(models.Model):
     terminal = models.ForeignKey('terminal.Terminal', null=True, on_delete=models.CASCADE)
     date_created = models.DateTimeField(auto_now_add=True)
 
+    CACHE_KEY = 'TERMINAL_STATUS_{}'
+
     class Meta:
         db_table = 'terminal_status'
         get_latest_by = 'date_created'
         verbose_name = _("Status")
 
+    @classmethod
+    def get_terminal_latest_stat(cls, terminal):
+        key = cls.CACHE_KEY.format(terminal.id)
+        data = cache.get(key)
+        if not data:
+            return None
+        data.pop('terminal', None)
+        stat = cls(**data)
+        stat.terminal = terminal
+        stat.is_alive = terminal.is_alive
+        stat.keep_one_decimal_place()
+        return stat
 
+    def keep_one_decimal_place(self):
+        keys = ['cpu_load', 'memory_used', 'disk_used']
+        for key in keys:
+            value = getattr(self, key, 0)
+            if not isinstance(value, (int, float)):
+                continue
+            value = '%.1f' % value
+            setattr(self, key, float(value))
+
+    def save(self, force_insert=False, force_update=False, using=None,
+             update_fields=None):
+        self.terminal.set_alive(ttl=120)
+        return self.save_to_cache()
+
+    def save_to_cache(self):
+        if not self.terminal:
+            return
+        key = self.CACHE_KEY.format(self.terminal.id)
+        data = model_to_dict(self)
+        cache.set(key, data, 60 * 3)
+        return data

apps/terminal/models/component/terminal.py

@@ -1,6 +1,7 @@
 import time
 
 from django.conf import settings
+from django.core.cache import cache
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
@@ -35,6 +36,10 @@ class TerminalStatusMixin:
             return False
         return time.time() - self.last_stat.date_created.timestamp() < 150
 
+    def set_alive(self, ttl=120):
+        key = self.ALIVE_KEY.format(self.id)
+        cache.set(key, True, ttl)
+
 
 class StorageMixin:
     command_storage: str