Configure xApp metrics in xApp description

[ric-plt/vespamgr.git] / cmd / vesmgr / subscribexAPPNotifications.go

diff --git a/cmd/vesmgr/subscribexAPPNotifications.go b/cmd/vesmgr/subscribexAPPNotifications.go
new file mode 100644 (file)
index 0000000..6f8ed77
--- /dev/null
+++ b/cmd/vesmgr/subscribexAPPNotifications.go
@@ -0,0 +1,89 @@
+/*
+ *  Copyright (c) 2019 AT&T Intellectual Property.
+ *  Copyright (c) 2018-2019 Nokia.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package main
+
+import (
+       "bytes"
+       "encoding/json"
+       "errors"
+       "fmt"
+       "io/ioutil"
+       "net/http"
+       "time"
+)
+
+// appmgr API
+const appmgrSubsPath = "/ric/v1/subscriptions"
+
+var errPostingFailed error = errors.New("Posting subscriptions failed")
+var errWrongStatusCode error = errors.New("Wrong subscriptions response StatusCode")
+
+func subscribexAppNotifications(targetUrl string, subscriptions chan subsChannel, timeout time.Duration, subsUrl string) {
+       requestBody := []byte(fmt.Sprintf(`{"maxRetries": 5, "retryTimer": 5, "eventType":"all", "targetUrl": "%v"}`, targetUrl))
+       req, err := http.NewRequest("POST", subsUrl, bytes.NewBuffer(requestBody))
+       if err != nil {
+               logger.Error("Setting NewRequest failed: %s", err)
+               subscriptions <- subsChannel{false, err}
+               return
+       }
+       req.Header.Set("Content-Type", "application/json")
+       client := &http.Client{}
+       client.Timeout = time.Second * timeout
+       for {
+               err := subscribexAppNotificationsClientDo(req, client)
+               if err == nil {
+                       break
+               } else if err != errPostingFailed && err != errWrongStatusCode {
+                       subscriptions <- subsChannel{false, err}
+                       return
+               }
+               time.Sleep(5 * time.Second)
+       }
+       subscriptions <- subsChannel{true, nil}
+}
+
+func subscribexAppNotificationsClientDo(req *http.Request, client *http.Client) error {
+       resp, err := client.Do(req)
+       if err != nil {
+               logger.Error("Posting subscriptions failed: %s", err)
+               return errPostingFailed
+       } else {
+               defer resp.Body.Close()
+               if resp.StatusCode == http.StatusCreated {
+                       logger.Info("Subscriptions response StatusCode: %d", resp.StatusCode)
+                       logger.Info("Subscriptions response headers: %s", resp.Header)
+                       body, err := ioutil.ReadAll(resp.Body)
+                       if err != nil {
+                               logger.Error("Subscriptions response Body read failed: %s", err)
+                               return err
+                       }
+                       logger.Info("Response Body: %s", body)
+                       var result map[string]interface{}
+                       if err := json.Unmarshal([]byte(body), &result); err != nil {
+                               logger.Error("json.Unmarshal failed: %s", err)
+                               return err
+                       }
+                       logger.Info("Subscription id from the response: %s", result["id"].(string))
+                       vesmgr.appmgrSubsId = result["id"].(string)
+                       return nil
+               } else {
+                       logger.Error("Wrong subscriptions response StatusCode: %d", resp.StatusCode)
+                       return errWrongStatusCode
+               }
+       }
+}