feat: Ef 556 upload predefined provision watchers

src/c/config.c

@@ -86,6 +86,7 @@ iot_data_t *edgex_common_config_defaults (const char *svcname)
   iot_data_string_map_add (result, "Device/Labels", iot_data_alloc_typed_vector (0, IOT_DATA_STRING));
   iot_data_string_map_add (result, "Device/ProfilesDir", iot_data_alloc_string ("", IOT_DATA_REF));
   iot_data_string_map_add (result, "Device/DevicesDir", iot_data_alloc_string ("", IOT_DATA_REF));
+  iot_data_string_map_add (result, "Device/ProvisionWatchersDir", iot_data_alloc_string ("", IOT_DATA_REF));
   iot_data_string_map_add (result, "Device/EventQLength", iot_data_alloc_ui32 (0));
   iot_data_string_map_add (result, "Device/AllowedFails", iot_data_alloc_i32 (0));
   iot_data_string_map_add (result, "Device/DeviceDownTimeout", iot_data_alloc_ui64 (0));
@@ -510,6 +511,7 @@ static void edgex_device_populateCommonConfigFromMap (edgex_device_config *confi
   config->device.maxeventsize = iot_data_ui32 (iot_data_string_map_get (map, "MaxEventSize"));
   config->device.profilesdir = iot_data_string_map_get_string (map, "Device/ProfilesDir");
   config->device.devicesdir = iot_data_string_map_get_string (map, "Device/DevicesDir");
+  config->device.provisionwatchersdir = iot_data_string_map_get_string (map, "Device/ProvisionWatchersDir");
   config->device.allowed_fails = iot_data_ui32 (iot_data_string_map_get (map, "Device/AllowedFails"));
   config->device.dev_downtime = iot_data_ui64 (iot_data_string_map_get (map, "Device/DeviceDownTimeout"));
 
@@ -736,6 +738,7 @@ static JSON_Value *edgex_device_config_toJson (devsdk_service_t *svc)
   json_object_set_uint (dobj, "MaxEventSize", svc->config.device.maxeventsize);
   json_object_set_string (dobj, "ProfilesDir", svc->config.device.profilesdir);
   json_object_set_string (dobj, "DevicesDir", svc->config.device.devicesdir);
+  json_object_set_string (dobj, "ProvisionWatchersDir", svc->config.device.provisionwatchersdir);
   json_object_set_boolean
     (dobj, "UpdateLastConnected", svc->config.device.updatelastconnected);
   json_object_set_uint (dobj, "EventQLength", svc->config.device.eventqlen);

src/c/config.h

@@ -59,6 +59,7 @@ typedef struct edgex_device_deviceinfo
   _Atomic(uint32_t) maxeventsize;
   const char *profilesdir;
   const char *devicesdir;
+  const char *provisionwatchersdir;
   atomic_bool updatelastconnected;
   uint32_t eventqlen;
   uint32_t allowed_fails;

src/c/examples/discovery/README.md

@@ -43,13 +43,7 @@ curl -X POST 0:59999/api/v3/discovery
 ```
 
 Initially, none of the discovered devices will be added to EdgeX, but by
-using appropriate Provision Watchers they can be accepted. To upload the
-supplied Provision Watchers to core-metadata:
-
-```
-curl -X POST [email protected] 0:59881/api/v3/provisionwatcher
-curl -X POST [email protected] 0:59881/api/v3/provisionwatcher
-```
+using appropriate Provision Watchers they can be accepted.  The structure of an example provision watcher can be found in res/watchers.  The SDK will parse all watcher objects inside of the directory defined by the `Device/ProvisionWatcherDir` configuration value and automatically upload them to core-metadata.  If a provision watcher already exists and is registered in core-metadata, it is skipped.
 
 The Provision Watchers each match one of the discovered devices. They work by
 specifying acceptance criteria (`identifiers`) that match potentially many

src/c/examples/discovery/res/configuration.yaml

@@ -18,6 +18,7 @@ Service:
 Device:
   ProfilesDir: ./res/profiles
   DevicesDir: ./res/devices
+  ProvisionWatchersDir: ./res/watchers
 
 MessageBus:
   Optional:

src/c/examples/discovery/res/watchers/watcher1.json

@@ -0,0 +1,25 @@
+{
+    "apiVersion": "v3",
+    "name": "watcher1",
+    "identifiers": {
+        "MAC": "00-05-1B-A1-99-[0-9A-Fa-f][0-9A-Fa-f]"
+    },
+    "blockingIdentifiers": {
+        "MAC": [
+            "00-05-1B-A1-99-99"
+        ]
+    },
+    "serviceName": "device-template",
+    "adminState": "UNLOCKED",
+    "discoveredDevice": {
+        "profileName": "TemplateSensor",
+        "serviceName": "device-template",
+        "adminState": "UNLOCKED",
+        "properties": {
+            "DeviceNameTemplate": {
+                "valueReplace": true,
+                "template": "device-name-{{MAC}}"
+            }
+        }
+    }
+}

src/c/examples/discovery/res/watchers/watcher2.json

@@ -0,0 +1,26 @@
+{
+    "apiVersion": "v3",
+    "name": "watcher2",
+    "identifiers": {
+        "HTTP": "10\\.0\\.0\\.[0-9]*"
+    },
+    "blockingIdentifiers": {
+        "HTTP": [
+            "10.0.0.1",
+            "10.0.0.255"
+        ]
+    },
+    "profileName": "TemplateSensor",
+    "adminstate": "UNLOCKED",
+    "discoveredDevice": {
+        "profileName": "TemplateSensor",
+        "serviceName": "device-template",
+        "adminState": "UNLOCKED",
+        "properties": {
+            "DeviceNameTemplate": {
+                "valueReplace": true,
+                "template": "device-name-{{HTTP}}"
+            }
+        }
+    }
+}

src/c/metadata.c

@@ -747,3 +747,57 @@ edgex_watcher *edgex_metadata_client_get_watchers
   *err = EDGEX_OK;
   return result;
 }
+
+void edgex_metadata_client_add_watcher_jobj(iot_logger_t *lc, edgex_service_endpoints *endpoints, edgex_secret_provider_t *secretprovider, const char *servicename, JSON_Object *jobj, devsdk_error *err)
+{
+
+  if (!json_object_get_string(jobj, "serviceName")) {
+    json_object_set_string (jobj, "serviceName", servicename);
+  }
+
+  if (!json_object_get_string(jobj, "adminState")) {
+    json_object_set_string (jobj, "adminState", "UNLOCKED");
+  }
+
+  if (!json_object_get_string(jobj, "apiVersion")) {
+    json_object_set_string (jobj, "apiVersion", EDGEX_API_VERSION);
+  }
+
+  JSON_Value *reqval = edgex_wrap_request("ProvisionWatcher", json_object_get_wrapping_value (jobj));
+  char *json = json_serialize_to_string(reqval);
+  edgex_ctx ctx;
+  *err = EDGEX_OK;
+  char url[URL_BUF_SIZE];
+
+  memset (&ctx, 0, sizeof (edgex_ctx));
+
+  snprintf
+  (
+    url,
+    URL_BUF_SIZE - 1,
+    "http://%s:%u/api/" EDGEX_API_VERSION "/provisionwatcher",
+    endpoints->metadata.host,
+    endpoints->metadata.port
+  );
+
+  iot_data_t *jwt_data = edgex_secrets_request_jwt (secretprovider);
+  ctx.jwt_token = iot_data_string (jwt_data);
+
+  edgex_http_post (lc, &ctx, url, json, edgex_http_write_cb, err);
+
+  iot_data_free(jwt_data);
+  ctx.jwt_token = NULL;
+
+  if (err->code == 0)
+  {
+    iot_log_info(lc, "Provision watcher %s created", json_object_get_string(jobj, "name"));
+  }
+  else
+  {
+    iot_log_info(lc, "edgex_metadata_client_add_watcher_jobj: %s: %s", err->reason, ctx.buff);
+  }
+
+  json_value_free (reqval);
+  free(ctx.buff);
+  json_free_serialized_string (json);
+}

src/c/metadata.h

@@ -151,4 +151,14 @@ edgex_watcher *edgex_metadata_client_get_watchers
   devsdk_error * err
 );
 
+void edgex_metadata_client_add_watcher_jobj
+(
+  iot_logger_t *lc,
+  edgex_service_endpoints *endpoints,
+  edgex_secret_provider_t *secretprovider,
+  const char *servicename,
+  JSON_Object *obj,
+  devsdk_error *err
+);
+
 #endif

src/c/service.c

@@ -761,6 +761,17 @@ static void startConfigured (devsdk_service_t *svc, const devsdk_timeout *deadli
     edgex_watcher_free (w);
   }
 
+  /* Load Provision Watchers from files and register in metadata */
+  if (svc->config.device.provisionwatchersdir && strlen (svc->config.device.provisionwatchersdir))
+  {
+    edgex_device_watchers_upload (svc, err);
+    if (err->code)
+    {
+      iot_log_error (svc->logger, "Failed to upload provision watchers from directory");
+      return;
+    }
+  }
+
   /* Start scheduled events */
 
   iot_scheduler_start (svc->scheduler);

src/c/watchers.c

@@ -8,7 +8,10 @@
 
 #include "watchers.h"
 #include "edgex-rest.h"
-
+#include "service.h"
+#include "errorlist.h"
+#include "metadata.h"
+#include "filesys.h"
 #include <regex.h>
 
 typedef struct edgex_watchlist_t
@@ -179,6 +182,24 @@ static bool matchpw (const edgex_watcher *pw, const iot_data_t *ids)
   return true;
 }
 
+static bool edgex_watcher_exists (const edgex_watchlist_t *wl, const char *name)
+{
+  bool exists = false;
+  pthread_rwlock_rdlock ((pthread_rwlock_t *)&wl->lock);
+
+  for (const edgex_watcher *w = wl->list; w; w = w->next)
+  {
+    if (strcmp (w->name, name) == 0)
+    {
+      exists = true;
+      break;
+    }
+  }
+
+  pthread_rwlock_unlock ((pthread_rwlock_t *)&wl->lock);
+  return exists;
+}
+
 edgex_watcher *edgex_watchlist_match (const edgex_watchlist_t *wl, const iot_data_t *ids)
 {
   pthread_rwlock_rdlock ((pthread_rwlock_t *)&wl->lock);
@@ -199,3 +220,60 @@ edgex_watcher *edgex_watchlist_match (const edgex_watchlist_t *wl, const iot_dat
   pthread_rwlock_unlock ((pthread_rwlock_t *)&wl->lock);
   return result;
 }
+
+static void edgex_add_watcher_json (devsdk_service_t *svc, const char *fname, devsdk_error *err)
+{
+
+  JSON_Value *jval = json_parse_file (fname);
+  if (jval)
+  {
+    JSON_Object *jobj = json_value_get_object (jval);
+    const char *name = json_object_get_string (jobj, "name");
+    if (name)
+    {
+      iot_log_debug(svc->logger, "Checking existence of ProvisionWatcher %s", name);
+      if (edgex_watcher_exists (svc->watchlist, name))
+      {
+        iot_log_info(svc->logger, "ProvisionWatcher %s already exists: skipped", name);
+      } 
+      else 
+      {
+        JSON_Value *copy = json_value_deep_copy(jval);
+        JSON_Object *watchobj = json_value_get_object(copy);
+        edgex_metadata_client_add_watcher_jobj(svc->logger, &svc->config.endpoints, svc->secretstore, svc->name, watchobj, err);
+      }
+    }
+    else
+    {
+      iot_log_warn (svc->logger, "Provision watcher upload: Missing provisionwatcher name in %s", fname);
+    }
+
+    json_value_free (jval);
+  }
+  else
+  {
+    iot_log_error (svc->logger, "File %s does not parse as JSON", fname);
+    *err = EDGEX_CONF_PARSE_ERROR;
+  }
+}
+
+void edgex_device_watchers_upload (devsdk_service_t *svc, devsdk_error *err)
+{
+  *err = EDGEX_OK;
+
+  if (!svc->config.device.provisionwatchersdir || !strlen(svc->config.device.provisionwatchersdir))
+  {
+    return;  // No directory configured
+  }
+
+  iot_log_info (svc->logger, "Processing Provision Watchers from %s", svc->config.device.provisionwatchersdir);
+
+  devsdk_strings *filenames = devsdk_scandir (svc->logger, svc->config.device.provisionwatchersdir, "json");
+
+  for (devsdk_strings *f = filenames; f; f = f->next)
+  {
+    edgex_add_watcher_json (svc, f->str, err);
+  }
+
+  devsdk_strings_free (filenames);
+}

src/c/watchers.h

@@ -31,5 +31,6 @@ extern bool edgex_watchlist_remove_watcher (edgex_watchlist_t *list, const char
 extern void edgex_watchlist_update_watcher (edgex_watchlist_t *list, const edgex_watcher *updated);
 
 extern edgex_watcher *edgex_watchlist_match (const edgex_watchlist_t *list, const iot_data_t *ids);
+extern void edgex_device_watchers_upload (devsdk_service_t *svc, devsdk_error *err);
 
 #endif