add example for cache volume

imagenet-classification-for-raspi/.actdk/dependencies.json

@@ -17,7 +17,8 @@
   },
   "raspberrypi-bullseye": {
     "apt": [
-      "libraspberrypi0"
+      "libraspberrypi0",
+      "libatomic1"
     ],
     "pip": [
       "actfw-raspberrypi"

use-cache-volume/.actdk/dependencies.json

@@ -0,0 +1,15 @@
+{
+  "apt": [
+    "python3",
+    "python3-pil"
+  ],
+  "pip": [],
+  "raspberrypi-bullseye": {
+    "apt": [
+      "libraspberrypi0"
+    ],
+    "pip": [
+      "actfw-raspberrypi"
+    ]
+  }
+}

use-cache-volume/.actdk/files.json

@@ -0,0 +1,5 @@
+{
+  "main": "main",
+  "healthchecker": "healthchecker",
+  "act_setting": "act_settings.json"
+}

use-cache-volume/.actdk/setting.json

@@ -0,0 +1,9 @@
+{
+  "app_id": "use-cache-volume",
+  "app_server_id": 1,
+  "short_description": "example of using cache volume",
+  "short_descriptions": {},
+  "target_types": [
+    "raspberrypi-bullseye"
+  ]
+}

use-cache-volume/README.md

@@ -0,0 +1,7 @@
+# use-cache-volume
+
+**※このサンプルアプリケーションはActcastOS 3 に対応しています**
+
+## 概要
+
+マニフェストの`cache_volume`を指定することで、デバイス再起動後でも利用できるキャッシュボリュームを作成するサンプルアプリです。

use-cache-volume/act_settings.json

@@ -0,0 +1 @@
+{}

use-cache-volume/app/healthchecker

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+true

use-cache-volume/app/main

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+exec python3 main.py

use-cache-volume/app/main.py

@@ -0,0 +1,52 @@
+from time import sleep
+import actfw_core 
+from actfw_core.task.task import Task
+import subprocess
+
+FILE_PATH = "/mnt/cache_volume/cachced_file"
+
+class WritingFileTask(Task):
+    def __init__(self, interval):
+        super().__init__()
+        self.interval = interval
+
+    def run(self):
+        subprocess.run(["touch", FILE_PATH], check=True)
+        while self._is_running():
+            # read count from file
+            with open(FILE_PATH, "r") as f:
+                content = f.read()
+                actfw_core.notify([{ "message": content }])
+                if content == "":
+                    count = 0
+                else:
+                    count = int(content)
+
+            # overwrite count to file
+            with open(FILE_PATH, "w") as f:
+                f.write(str(count + 1))
+
+            # sleep
+            for i in range(self.interval):
+                if not self._is_running():
+                    break
+                sleep(1)
+
+
+def main():
+    # Actcast application
+    app = actfw_core.Application()
+
+    # Load act setting
+    settings = app.get_settings({ 'interval': 60 })
+
+    cmd = actfw_core.CommandServer()
+    actfw_core.notify([{ "message": "start up" }])
+
+    app.register_task(cmd)
+    app.register_task(WritingFileTask(settings.get('interval', 60)))
+
+    app.run()
+
+if __name__ == "__main__":
+    main()

use-cache-volume/data_schema.json

@@ -0,0 +1,11 @@
+
+{
+  "$schema": "https://actcast.io/schema/v8/data_schema_schema.json",
+  "type": "array",
+  "items": {
+    "type": "object",
+    "properties": {
+    },
+    "required": []
+  }
+}

use-cache-volume/manifesto/bullseye.json

@@ -0,0 +1,14 @@
+{
+  "version": 2,
+  "target_type": "raspberrypi-bullseye",
+  "boards": [
+    "RSPi3B",
+    "RSPi3BPlus",
+    "RSPi3APlus",
+    "RSPi4B"
+  ],
+  "devices": [],
+  "cache_volume": {
+    "size": 16
+  }
+}

use-cache-volume/setting_schema.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://actcast.io/schema/v8/setting_schema_schema.json",
+  "type": "object",
+  "properties": {
+    "interval": {
+      "type": "integer",
+      "minimum": 1,
+      "description": "Interval in seconds to count up"
+    }
+  },
+  "required": []
+}