E2Manager/clients/routing_manager_client.go

   1 //
   2 // Copyright 2019 AT&T Intellectual Property
   3 // Copyright 2019 Nokia
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the "License");
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 //      http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16
  17 //  This source code is part of the near-RT RIC (RAN Intelligent Controller)
  18 //  platform project (RICP).
  19
  20 package clients
  21
  22 import (
  23         "bytes"
  24         "e2mgr/configuration"
  25         "e2mgr/e2managererrors"
  26         "e2mgr/logger"
  27         "e2mgr/models"
  28         "encoding/json"
  29         "net/http"
  30 )
  31
  32 const (
  33         AddE2TInstanceApiSuffix            = "e2t"
  34         AssociateRanToE2TInstanceApiSuffix = "associate-ran-to-e2t"
  35         DissociateRanE2TInstanceApiSuffix  = "dissociate-ran"
  36         DeleteE2TInstanceApiSuffix         = "e2t"
  37 )
  38
  39 type RoutingManagerClient struct {
  40         logger     *logger.Logger
  41         config     *configuration.Configuration
  42         httpClient IHttpClient
  43 }
  44
  45 type IRoutingManagerClient interface {
  46         AddE2TInstance(e2tAddress string) error
  47         AssociateRanToE2TInstance(e2tAddress string, ranName string) error
  48         DissociateRanE2TInstance(e2tAddress string, ranName string) error
  49         DissociateAllRans(e2tAddresses []string) error
  50         DeleteE2TInstance(e2tAddress string, ransToBeDissociated []string, e2tToRansAssociations map[string][]string) error
  51 }
  52
  53 func NewRoutingManagerClient(logger *logger.Logger, config *configuration.Configuration, httpClient IHttpClient) *RoutingManagerClient {
  54         return &RoutingManagerClient{
  55                 logger:     logger,
  56                 config:     config,
  57                 httpClient: httpClient,
  58         }
  59 }
  60
  61 func (c *RoutingManagerClient) AddE2TInstance(e2tAddress string) error {
  62
  63         data := models.NewRoutingManagerE2TData(e2tAddress)
  64         url := c.config.RoutingManager.BaseUrl + AddE2TInstanceApiSuffix
  65
  66         return c.PostMessage(url, data)
  67 }
  68
  69 func (c *RoutingManagerClient) AssociateRanToE2TInstance(e2tAddress string, ranName string) error {
  70
  71         data := models.RoutingManagerE2TDataList{models.NewRoutingManagerE2TData(e2tAddress, ranName)}
  72         url := c.config.RoutingManager.BaseUrl + AssociateRanToE2TInstanceApiSuffix
  73
  74         return c.PostMessage(url, data)
  75 }
  76
  77 func (c *RoutingManagerClient) DissociateRanE2TInstance(e2tAddress string, ranName string) error {
  78
  79         data := models.RoutingManagerE2TDataList{models.NewRoutingManagerE2TData(e2tAddress, ranName)}
  80         url := c.config.RoutingManager.BaseUrl + DissociateRanE2TInstanceApiSuffix
  81
  82         return c.PostMessage(url, data)
  83 }
  84
  85 func (c *RoutingManagerClient) DissociateAllRans(e2tAddresses []string) error {
  86
  87         data := mapE2TAddressesToE2DataList(e2tAddresses)
  88         url := c.config.RoutingManager.BaseUrl + DissociateRanE2TInstanceApiSuffix
  89
  90         return c.PostMessage(url, data)
  91 }
  92
  93 func (c *RoutingManagerClient) DeleteE2TInstance(e2tAddress string, ransTobeDissociated []string, e2tToRansAssociations map[string][]string) error {
  94         e2tDataList := convertE2TToRansAssociationsMapToE2TDataList(e2tToRansAssociations)
  95         data := models.NewRoutingManagerDeleteRequestModel(e2tAddress, ransTobeDissociated, e2tDataList)
  96         url := c.config.RoutingManager.BaseUrl + DeleteE2TInstanceApiSuffix
  97         return c.DeleteMessage(url, data)
  98 }
  99
 100 func (c *RoutingManagerClient) sendMessage(method string, url string, data interface{}) error {
 101         marshaled, err := json.Marshal(data)
 102
 103         if err != nil {
 104                 return e2managererrors.NewRoutingManagerError()
 105         }
 106
 107         body := bytes.NewBuffer(marshaled)
 108         c.logger.Infof("[E2 Manager -> Routing Manager] #RoutingManagerClient.sendMessage - %s url: %s, request body: %+v", method, url, body)
 109
 110         var resp *http.Response
 111
 112         if method == http.MethodPost {
 113                 resp, err = c.httpClient.Post(url, "application/json", body)
 114         } else if method == http.MethodDelete {
 115                 resp, err = c.httpClient.Delete(url, "application/json", body)
 116         }
 117
 118         if err != nil {
 119                 c.logger.Errorf("#RoutingManagerClient.sendMessage - failed sending request. error: %s", err)
 120                 return e2managererrors.NewRoutingManagerError()
 121         }
 122
 123         defer resp.Body.Close()
 124
 125         if resp.StatusCode >= http.StatusOK && resp.StatusCode < http.StatusMultipleChoices {
 126                 c.logger.Infof("[Routing Manager -> E2 Manager] #RoutingManagerClient.sendMessage - success. http status code: %d", resp.StatusCode)
 127                 return nil
 128         }
 129
 130         c.logger.Errorf("[Routing Manager -> E2 Manager] #RoutingManagerClient.sendMessage - failure. http status code: %d", resp.StatusCode)
 131         return e2managererrors.NewRoutingManagerError()
 132 }
 133
 134 func (c *RoutingManagerClient) DeleteMessage(url string, data interface{}) error {
 135         return c.sendMessage(http.MethodDelete, url, data)
 136 }
 137
 138 func (c *RoutingManagerClient) PostMessage(url string, data interface{}) error {
 139         return c.sendMessage(http.MethodPost, url, data)
 140 }
 141
 142 func mapE2TAddressesToE2DataList(e2tAddresses []string) models.RoutingManagerE2TDataList {
 143         e2tDataList := make(models.RoutingManagerE2TDataList, len(e2tAddresses))
 144
 145         for i, v := range e2tAddresses {
 146                 e2tDataList[i] = models.NewRoutingManagerE2TData(v)
 147         }
 148
 149         return e2tDataList
 150 }
 151
 152 func convertE2TToRansAssociationsMapToE2TDataList(e2tToRansAssociations map[string][]string) models.RoutingManagerE2TDataList {
 153         e2tDataList := make(models.RoutingManagerE2TDataList, len(e2tToRansAssociations))
 154         i := 0
 155         for k, v := range e2tToRansAssociations {
 156                 e2tDataList[i] = models.NewRoutingManagerE2TData(k, v...)
 157                 i++
 158         }
 159
 160         return e2tDataList
 161 }