ceph/src/common/zipkin_trace.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 #ifndef COMMON_ZIPKIN_TRACE_H
   4 #define COMMON_ZIPKIN_TRACE_H
   5
   6 #include "acconfig.h"
   7 #include "include/encoding.h"
   8
   9 #ifdef WITH_BLKIN
  10
  11 #include <ztracer.hpp>
  12
  13 #else // !WITH_BLKIN
  14
  15 // add stubs for noop Trace and Endpoint
  16
  17 // match the "real" struct
  18 struct blkin_trace_info {
  19     int64_t trace_id;
  20     int64_t span_id;
  21     int64_t parent_span_id;
  22 };
  23
  24 namespace ZTracer
  25 {
  26 static inline int ztrace_init() { return 0; }
  27
  28 class Endpoint {
  29  public:
  30   Endpoint(const char *name) {}
  31   Endpoint(const char *ip, int port, const char *name) {}
  32
  33   void copy_ip(const std::string &newip) {}
  34   void copy_name(const std::string &newname) {}
  35   void copy_address_from(const Endpoint *endpoint) {}
  36   void share_address_from(const Endpoint *endpoint) {}
  37   void set_port(int p) {}
  38 };
  39
  40 class Trace {
  41  public:
  42   Trace() {}
  43   Trace(const char *name, const Endpoint *ep, const Trace *parent = NULL) {}
  44   Trace(const char *name, const Endpoint *ep,
  45         const blkin_trace_info *i, bool child=false) {}
  46
  47   bool valid() const { return false; }
  48   operator bool() const { return false; }
  49
  50   int init(const char *name, const Endpoint *ep, const Trace *parent = NULL) {
  51     return 0;
  52   }
  53   int init(const char *name, const Endpoint *ep,
  54            const blkin_trace_info *i, bool child=false) {
  55     return 0;
  56   }
  57
  58   void copy_name(const std::string &newname) {}
  59
  60   const blkin_trace_info* get_info() const { return NULL; }
  61   void set_info(const blkin_trace_info *i) {}
  62
  63   void keyval(const char *key, const char *val) const {}
  64   void keyval(const char *key, int64_t val) const {}
  65   void keyval(const char *key, const char *val, const Endpoint *ep) const {}
  66   void keyval(const char *key, int64_t val, const Endpoint *ep) const {}
  67
  68   void event(const char *event) const {}
  69   void event(const char *event, const Endpoint *ep) const {}
  70 };
  71 } // namespace ZTrace
  72
  73 #endif // !WITH_BLKIN
  74
  75 static inline void encode(const blkin_trace_info& b, bufferlist& bl)
  76 {
  77   ::encode(b.trace_id, bl);
  78   ::encode(b.span_id, bl);
  79   ::encode(b.parent_span_id, bl);
  80 }
  81
  82 static inline void decode(blkin_trace_info& b, bufferlist::iterator& p)
  83 {
  84   ::decode(b.trace_id, p);
  85   ::decode(b.span_id, p);
  86   ::decode(b.parent_span_id, p);
  87 }
  88
  89
  90
  91 #endif // COMMON_ZIPKIN_TRACE_H