src/xapp-utils/xapp_rmr.hpp

   1 /*
   2 ==================================================================================
   3
   4         Copyright (c) 2019-2020 AT&T Intellectual Property.
   5
   6    Licensed under the Apache License, Version 2.0 (the "License");
   7    you may not use this file except in compliance with the License.
   8    You may obtain a copy of the License at
   9
  10        http://www.apache.org/licenses/LICENSE-2.0
  11
  12    Unless required by applicable law or agreed to in writing, software
  13    distributed under the License is distributed on an "AS IS" BASIS,
  14    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15    See the License for the specific language governing permissions and
  16    limitations under the License.
  17 ==================================================================================
  18 */
  19
  20 #ifndef XAPP_RMR_XAPP_RMR_H_
  21 #define XAPP_RMR_XAPP_RMR_H_
  22
  23
  24 #ifdef __GNUC__
  25 #define likely(x)  __builtin_expect((x), 1)
  26 #define unlikely(x) __builtin_expect((x), 0)
  27 #else
  28 #define likely(x) (x)
  29 #define unlikely(x) (x)
  30 #endif
  31
  32 #include <iostream>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #include <string.h>
  36 #include <error.h>
  37 #include <assert.h>
  38 #include <sstream>
  39 #include <thread>
  40 #include <functional>
  41 #include <map>
  42 #include <mutex>
  43 #include <sys/epoll.h>
  44 #include <rmr/rmr.h>
  45 #include <rmr/RIC_message_types.h>
  46 #include <mdclog/mdclog.h>
  47 #include <vector>
  48
  49 typedef struct{
  50         struct timespec ts;
  51         int32_t message_type;
  52         int32_t state;
  53         int32_t payload_length;
  54         unsigned char sid[RMR_MAX_SID]; //Subscription ID.
  55         unsigned char src[RMR_MAX_SRC]; //Xapp Name
  56         unsigned char meid[RMR_MAX_MEID]={};
  57
  58 }  xapp_rmr_header;
  59
  60
  61 class XappRmr{
  62 private:
  63         std::string _proto_port;
  64         int _nattempts;
  65         bool _rmr_is_ready;
  66     bool _listen;
  67         void* _xapp_rmr_ctx;
  68         rmr_mbuf_t*             _xapp_send_buff;                                        // send buffer
  69         rmr_mbuf_t*             _xapp_received_buff;                                    // received buffer
  70
  71
  72 public:
  73
  74         XappRmr(std::string, int rmrattempts=10);
  75         ~XappRmr(void);
  76         void xapp_rmr_init(bool);
  77
  78         template <class MessageProcessor>
  79         void xapp_rmr_receive(MessageProcessor&&, XappRmr *parent);
  80
  81         bool xapp_rmr_send(xapp_rmr_header*, void*);
  82
  83         bool rmr_header(xapp_rmr_header*);
  84         void set_listen(bool);
  85         bool get_listen(void);
  86         int get_is_ready(void);
  87         bool get_isRunning(void);
  88         void* get_rmr_context(void);
  89
  90 };
  91
  92
  93 // main workhorse thread which does the listen->process->respond loop
  94 template <class MsgHandler>
  95 void XappRmr::xapp_rmr_receive(MsgHandler&& msgproc, XappRmr *parent){
  96
  97         bool* resend = new bool(false);
  98         // Get the thread id
  99         std::thread::id my_id = std::this_thread::get_id();
 100         std::stringstream thread_id;
 101         std::stringstream ss;
 102
 103         thread_id << my_id;
 104
 105         // Get the rmr context from parent (all threads and parent use same rmr context. rmr context is expected to be thread safe)
 106         if(!parent->get_is_ready()){
 107                         mdclog_write( MDCLOG_ERR, "RMR Shows Not Ready in RECEIVER, file= %s, line=%d ",__FILE__,__LINE__);
 108                         return;
 109         }
 110         void *rmr_context = parent->get_rmr_context();
 111         assert(rmr_context != NULL);
 112
 113         // Get buffer specific to this thread
 114         this->_xapp_received_buff = NULL;
 115         this->_xapp_received_buff = rmr_alloc_msg(rmr_context, RMR_DEF_SIZE);
 116         assert(this->_xapp_received_buff != NULL);
 117
 118         mdclog_write(MDCLOG_INFO, "Starting receiver thread %s",  thread_id.str().c_str());
 119
 120         while(parent->get_listen()) {
 121                 mdclog_write(MDCLOG_INFO, "Listening at Thread: %s",  thread_id.str().c_str());
 122
 123                 this->_xapp_received_buff = rmr_rcv_msg( rmr_context, this->_xapp_received_buff );
 124                 //this->_xapp_received_buff = rmr_call( rmr_context, this->_xapp_received_buff);
 125
 126                 if( this->_xapp_received_buff->mtype < 0 || this->_xapp_received_buff->state != RMR_OK ) {
 127                         mdclog_write(MDCLOG_ERR, "bad msg:  state=%d  errno=%d, file= %s, line=%d", this->_xapp_received_buff->state, errno, __FILE__,__LINE__ );
 128                         return;
 129                 }
 130                 else
 131                 {
 132                         mdclog_write(MDCLOG_INFO,"RMR Received Message of Type: %d",this->_xapp_received_buff->mtype);
 133                         mdclog_write(MDCLOG_INFO,"RMR Received Message: %s",(char*)this->_xapp_received_buff->payload);
 134
 135                     //in case message handler returns true, need to resend the message.
 136                         msgproc(this->_xapp_received_buff, resend);
 137
 138                         if(*resend){
 139                                 mdclog_write(MDCLOG_INFO,"RMR Return to Sender Message of Type: %d",this->_xapp_received_buff->mtype);
 140                                 mdclog_write(MDCLOG_INFO,"RMR Return to Sender Message: %s",(char*)this->_xapp_received_buff->payload);
 141                                 rmr_rts_msg(rmr_context, this->_xapp_received_buff );
 142                                 sleep(1);
 143                                 *resend = false;
 144                         }
 145                         continue;
 146
 147                 }
 148
 149         }
 150         // Clean up
 151         try{
 152                 delete resend;
 153                 rmr_free_msg(this->_xapp_received_buff);
 154         }
 155         catch(std::runtime_error &e){
 156                 std::string identifier = __FILE__ +  std::string(", Line: ") + std::to_string(__LINE__) ;
 157                 std::string error_string = identifier = " Error freeing RMR message ";
 158                 mdclog_write(MDCLOG_ERR, error_string.c_str(), "");
 159         }
 160
 161         return;
 162 }
 163
 164
 165
 166
 167 #endif /* XAPP_RMR_XAPP_RMR_H_ */