added apply_configurations function

scripts/hostcfgd

@@ -1702,55 +1702,70 @@ class MemoryStatsCfg(object):
     2) Handle change of retention period
     3) Handle change of sampling interval
     """
+
     def __init__(self):
         self.cache = {}
+        self.memory_statistics_defaults = {
+            "enabled": "false",
+            "retention_time": "24h",
+            "sampling_interval": "5m"
+        }
 
     def load(self, memory_stats_config: dict):
-        """Memory stats configuration
-        Force load memory statistics configuration.
+        """
+        Load memory statistics configuration when the daemon starts.
         Args:
             memory_stats_config: Configured memory statistics settings.
         """
         syslog.syslog(syslog.LOG_INFO, "Memory_StatisticsCfg init ...")
-        memory_statistics_conf = memory_statistics_table.get("config", {})
-        for row in self.memory_statistics_defaults:
-            value = self.memory_statistics_defaults.get(row)
+        memory_statistics_conf = memory_stats_config.get("config", {})
+
+        # Apply default configurations if not present
+        for row, value in self.memory_statistics_defaults.items():
             if not memory_statistics_conf.get(row):
                 self.config_db.mod_entry("MEMORY_STATISTICS", "config", {row: value})
 
+        # Apply configurations to ensure they are set correctly on startup
+        self.apply_configuration(memory_statistics_conf)
+
+    def apply_configuration(self, config):
+        """
+        Apply the memory statistics configuration settings.
+        Args:
+            config: Configuration data for memory statistics.
+        """
+        # Determine if the feature is enabled or disabled
+        enabled = config.get("enabled", self.memory_statistics_defaults["enabled"]).lower() == "true"
+        retention_time = config.get("retention_time", self.memory_statistics_defaults["retention_time"])
+        sampling_interval = config.get("sampling_interval", self.memory_statistics_defaults["sampling_interval"])
+
+        # Enable or disable memory statistics
+        if enabled:
+            self.run_cmd(["sonic-memory_statistics-config", "--enable"])
+        else:
+            self.run_cmd(["sonic-memory_statistics-config", "--disable"])
+
+        # Set retention time and sampling interval
+        self.run_cmd(["sonic-memory_statistics-config", "--retention_time", retention_time])
+        self.run_cmd(["sonic-memory_statistics-config", "--sampling_interval", sampling_interval])
+
     def memory_statistics_update(self, key, data):
+        """
+        Handle updates to the memory statistics configuration.
+        Args:
+            key: Key identifying the config type.
+            data: Updated configuration data.
+        """
         syslog.syslog(syslog.LOG_INFO, "Memory_Statistics global configuration update")
         if key == "config":
-            # Admin mode
-            memory_statistics_enabled = self.memory_statistics_defaults["enabled"]
-            if data.get("enabled") is not None:
-                memory_statistics_enabled = data.get("enabled")
-            if memory_statistics_enabled.lower() == "true":
-                enabled = True
-            else:
-                enabled = False
-            if enabled:
-                run_cmd(["sonic-memory_statistics-conifg", "--enable"])
-            else:
-                run_cmd(["sonic-memory_statistics-config", "--disable"])
-
-            # Memory configuration
-            retention_time = self.memory_statistics_defaults["retention_time"]
-            if data.get("retention_time") is not None:
-                retention_time = data.get("retention_time")
-            run_cmd(["sonic-memory_statistics-config", "--retention_time", retention_time])
-
-            # Sampling interval
-            sampling_interval = self.memory_statistics_defaults["sampling_interval"]
-            if data.get("sampling_interval") is not None:
-                sampling_interval = data.get("sampling_interval")
-            run_cmd(["sonic-memory_statistics-config", "--sampling_interval", sampling_interval])
-
-    def run_cmd(cmd):
+            self.apply_configuration(data)
+
+    def run_cmd(self, cmd):
         """
-        Execute a shell command and return the output
+        Execute a shell command and return the output.
+        Args:
+            cmd: List of command arguments.
         """
-        import subprocess
         try:
             output = subprocess.check_output(cmd, stderr=subprocess.STDOUT)
             syslog.syslog(syslog.LOG_INFO, output.decode('utf-8'))