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/*
* Copyright 2014 Marios Kogias <marioskogias@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ZTRACER_H
#define ZTRACER_H
#include <string>
extern "C" {
#include <zipkin_c.h>
}
namespace ZTracer {
using std::string;
const char* const CLIENT_SEND = "cs";
const char* const CLIENT_RECV = "cr";
const char* const SERVER_SEND = "ss";
const char* const SERVER_RECV = "sr";
const char* const WIRE_SEND = "ws";
const char* const WIRE_RECV = "wr";
const char* const CLIENT_SEND_FRAGMENT = "csf";
const char* const CLIENT_RECV_FRAGMENT = "crf";
const char* const SERVER_SEND_FRAGMENT = "ssf";
const char* const SERVER_RECV_FRAGMENT = "srf";
static inline int ztrace_init() { return blkin_init(); }
class Endpoint : private blkin_endpoint {
private:
string _ip; // storage for blkin_endpoint.ip, see copy_ip()
string _name; // storage for blkin_endpoint.name, see copy_name()
friend class Trace;
public:
Endpoint(const char *name)
{
blkin_init_endpoint(this, "0.0.0.0", 0, name);
}
Endpoint(const char *ip, int port, const char *name)
{
blkin_init_endpoint(this, ip, port, name);
}
// copy constructor and operator need to account for ip/name storage
Endpoint(const Endpoint &rhs) : _ip(rhs._ip), _name(rhs._name)
{
blkin_init_endpoint(this, _ip.size() ? _ip.c_str() : rhs.ip,
rhs.port,
_name.size() ? _name.c_str(): rhs.name);
}
const Endpoint& operator=(const Endpoint &rhs)
{
_ip.assign(rhs._ip);
_name.assign(rhs._name);
blkin_init_endpoint(this, _ip.size() ? _ip.c_str() : rhs.ip,
rhs.port,
_name.size() ? _name.c_str() : rhs.name);
return *this;
}
// Endpoint assumes that ip and name will be string literals, and
// avoids making a copy and freeing on destruction. if you need to
// initialize Endpoint with a temporary string, copy_ip/copy_name()
// will store it in a std::string and assign from that
void copy_ip(const string &newip)
{
_ip.assign(newip);
ip = _ip.c_str();
}
void copy_name(const string &newname)
{
_name.assign(newname);
name = _name.c_str();
}
void copy_address_from(const Endpoint *endpoint)
{
_ip.assign(endpoint->ip);
ip = _ip.c_str();
port = endpoint->port;
}
void share_address_from(const Endpoint *endpoint)
{
ip = endpoint->ip;
port = endpoint->port;
}
void set_port(int p) { port = p; }
};
class Trace : private blkin_trace {
private:
string _name; // storage for blkin_trace.name, see copy_name()
public:
// default constructor zero-initializes blkin_trace valid()
// will return false on a default-constructed Trace until
// init()
Trace()
{
// zero-initialize so valid() returns false
name = NULL;
info.trace_id = 0;
info.span_id = 0;
info.parent_span_id = 0;
endpoint = NULL;
}
// construct a Trace with an optional parent
Trace(const char *name, const Endpoint *ep, const Trace *parent = NULL)
{
if (parent && parent->valid()) {
blkin_init_child(this, parent, ep ? : parent->endpoint,
name);
} else {
blkin_init_new_trace(this, name, ep);
}
}
// construct a Trace from blkin_trace_info
Trace(const char *name, const Endpoint *ep,
const blkin_trace_info *i, bool child=false)
{
if (child)
blkin_init_child_info(this, i, ep, name);
else {
blkin_init_new_trace(this, name, ep);
set_info(i);
}
}
// copy constructor and operator need to account for name storage
Trace(const Trace &rhs) : _name(rhs._name)
{
name = _name.size() ? _name.c_str() : rhs.name;
info = rhs.info;
endpoint = rhs.endpoint;
}
const Trace& operator=(const Trace &rhs)
{
_name.assign(rhs._name);
name = _name.size() ? _name.c_str() : rhs.name;
info = rhs.info;
endpoint = rhs.endpoint;
return *this;
}
// return true if the Trace has been initialized
bool valid() const { return info.trace_id != 0; }
operator bool() const { return valid(); }
// (re)initialize a Trace with an optional parent
int init(const char *name, const Endpoint *ep,
const Trace *parent = NULL)
{
if (parent && parent->valid())
return blkin_init_child(this, parent,
ep ? : parent->endpoint, name);
return blkin_init_new_trace(this, name, ep);
}
// (re)initialize a Trace from blkin_trace_info
int init(const char *name, const Endpoint *ep,
const blkin_trace_info *i, bool child=false)
{
if (child)
return blkin_init_child_info(this, i, ep, _name.c_str());
return blkin_set_trace_properties(this, i, _name.c_str(), ep);
}
// Trace assumes that name will be a string literal, and avoids
// making a copy and freeing on destruction. if you need to
// initialize Trace with a temporary string, copy_name() will store
// it in a std::string and assign from that
void copy_name(const string &newname)
{
_name.assign(newname);
name = _name.c_str();
}
const blkin_trace_info* get_info() const { return &info; }
void set_info(const blkin_trace_info *i) { info = *i; }
// record key-value annotations
void keyval(const char *key, const char *val) const
{
if (valid())
BLKIN_KEYVAL_STRING(this, endpoint, key, val);
}
void keyval(const char *key, int64_t val) const
{
if (valid())
BLKIN_KEYVAL_INTEGER(this, endpoint, key, val);
}
void keyval(const char *key, const char *val, const Endpoint *ep) const
{
if (valid())
BLKIN_KEYVAL_STRING(this, ep, key, val);
}
void keyval(const char *key, int64_t val, const Endpoint *ep) const
{
if (valid())
BLKIN_KEYVAL_INTEGER(this, ep, key, val);
}
// record timestamp annotations
void event(const char *event) const
{
if (valid())
BLKIN_TIMESTAMP(this, endpoint, event);
}
void event(const char *event, const Endpoint *ep) const
{
if (valid())
BLKIN_TIMESTAMP(this, ep, event);
}
};
}
#endif /* end of include guard: ZTRACER_H */
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