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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Reinforcement Learning: basic_usage_cpp.cc</title>
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<div class="title">basic_usage_cpp.cc</div> </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"> </div>
<div class="line"><span class="preprocessor">#include "basic_usage_cpp.h"</span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> main()</div>
<div class="line">{</div>
<div class="line"> <span class="comment">// return basic_usage_cb();</span></div>
<div class="line"> <span class="comment">// return basic_usage_ca();</span></div>
<div class="line"> <span class="comment">// return basic_usage_ccb();</span></div>
<div class="line"> <span class="comment">// return basic_usage_slates();</span></div>
<div class="line"> <span class="keywordflow">return</span> basic_usage_multistep();</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> basic_usage_cb()</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">char</span> <span class="keyword">const</span>* <span class="keyword">const</span> event_id = <span class="stringliteral">"event_id"</span>;</div>
<div class="line"> <span class="keywordtype">char</span> <span class="keyword">const</span>* <span class="keyword">const</span> context = R<span class="stringliteral">"({"shared":{"sf":1},"_multi":[ { "TAction":{"af":1} },{"TAction":{"af":2}}]})";</span></div>
<div class="line"><span class="stringliteral"> </span><span class="keywordtype">float</span> outcome = 1.0f;</div>
<div class="line"> </div>
<div class="line"> u::configuration config;</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (load_config_from_json(<span class="stringliteral">"client.json"</span>, config) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << <span class="stringliteral">"Unable to Load file: client.json"</span> << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> r::api_status status;</div>
<div class="line"> </div>
<div class="line"> r::cb_loop rl(config);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (rl.init(&status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Response class</span></div>
<div class="line"> r::ranking_response response;</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (rl.choose_rank(event_id, context, response, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordtype">size_t</span> chosen_action = 0;</div>
<div class="line"> <span class="keywordflow">if</span> (response.get_chosen_action_id(chosen_action, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> std::cout << <span class="stringliteral">"Chosen action id is: "</span> << chosen_action << std::endl;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Report received outcome (Optional: if this call is not made, default missing outcome is applied)</span></div>
<div class="line"> <span class="comment">// Missing outcome can be thought of as negative reinforcement</span></div>
<div class="line"> <span class="keywordflow">if</span> (rl.report_outcome(event_id, outcome, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> basic_usage_ca()</div>
<div class="line">{</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span>* event_id = <span class="stringliteral">"event_id"</span>;</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span>* context = R<span class="stringliteral">"({"f1":1,"f2":1,"f3":1,"f4":1,"f5":1})";</span></div>
<div class="line"><span class="stringliteral"> </span><span class="keywordtype">float</span> outcome = 1.0f;</div>
<div class="line"> </div>
<div class="line"> u::configuration config;</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (load_config_from_json(<span class="stringliteral">"client.json"</span>, config) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << <span class="stringliteral">"Unable to Load file: client.json"</span> << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> r::api_status status;</div>
<div class="line"> </div>
<div class="line"> r::ca_loop rl(config);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (rl.init(&status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Response class</span></div>
<div class="line"> r::continuous_action_response response;</div>
<div class="line"> </div>
<div class="line"> RL_IGNORE_DEPRECATED_USAGE_START</div>
<div class="line"> <span class="keywordflow">if</span> (rl.request_continuous_action(event_id, context, response, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> RL_IGNORE_DEPRECATED_USAGE_END</div>
<div class="line"> </div>
<div class="line"> <span class="keywordtype">float</span> chosen_action = response.get_chosen_action();</div>
<div class="line"> </div>
<div class="line"> std::cout << <span class="stringliteral">"Chosen continuous action is: "</span> << chosen_action << std::endl;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Report received outcome (Optional: if this call is not made, default missing outcome is applied)</span></div>
<div class="line"> <span class="comment">// Missing outcome can be thought of as negative reinforcement</span></div>
<div class="line"> <span class="keywordflow">if</span> (rl.report_outcome(event_id, outcome, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> basic_usage_ccb()</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">char</span> <span class="keyword">const</span>* <span class="keyword">const</span> context =</div>
<div class="line"> R<span class="stringliteral">"({"shared":{"sf":1},"_multi":[ { "TAction":{"af":1} },{"TAction":{"af":2}},{"TAction":{"af":3}}],"_slots":[{"f":1}, {"f":2}]})";</span></div>
<div class="line"><span class="stringliteral"></span> </div>
<div class="line"><span class="stringliteral"> u::configuration config;</span></div>
<div class="line"><span class="stringliteral"></span> </div>
<div class="line"><span class="stringliteral"> </span><span class="keywordflow">if</span> (load_config_from_json(<span class="stringliteral">"client.json"</span>, config) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << <span class="stringliteral">"Unable to Load file: client.json"</span> << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> r::api_status status;</div>
<div class="line"> </div>
<div class="line"> r::ccb_loop rl(config);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (rl.init(&status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Response class</span></div>
<div class="line"> r::decision_response response;</div>
<div class="line"> </div>
<div class="line"> RL_IGNORE_DEPRECATED_USAGE_START</div>
<div class="line"> <span class="keywordflow">if</span> (rl.request_decision(context, response, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> RL_IGNORE_DEPRECATED_USAGE_END</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& r : response)</div>
<div class="line"> {</div>
<div class="line"> <span class="keyword">const</span> <span class="keyword">auto</span> chosen_action = r.get_action_id();</div>
<div class="line"> <span class="keywordflow">if</span> (rl.report_outcome(r.get_slot_id(), <span class="stringliteral">"slot_id"</span>, 1.0f, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> basic_usage_slates()</div>
<div class="line">{</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span>* context =</div>
<div class="line"> R<span class="stringliteral">"({"shared":{"sf":1},"_multi":[ {"_slot_id":0,"TAction":{"af":1} },{"_slot_id":0,"TAction":{"af":2}},{"_slot_id":1,"TAction":{"af":3}},{"_slot_id":1,"TAction":{"af":4}}],"_slots":[{"f":1}, {"f":2}]})";</span></div>
<div class="line"><span class="stringliteral"></span> </div>
<div class="line"><span class="stringliteral"> u::configuration config;</span></div>
<div class="line"><span class="stringliteral"></span> </div>
<div class="line"><span class="stringliteral"> </span><span class="keywordflow">if</span> (load_config_from_json(<span class="stringliteral">"client.json"</span>, config) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << <span class="stringliteral">"Unable to Load file: client.json"</span> << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> r::api_status status;</div>
<div class="line"> </div>
<div class="line"> r::slates_loop rl(config);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (rl.init(&status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Response class</span></div>
<div class="line"> r::multi_slot_response response;</div>
<div class="line"> </div>
<div class="line"> RL_IGNORE_DEPRECATED_USAGE_START</div>
<div class="line"> <span class="keywordflow">if</span> (rl.request_multi_slot_decision(<span class="stringliteral">"event_id"</span>, context, response, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> RL_IGNORE_DEPRECATED_USAGE_END</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& r : response) { <span class="keyword">const</span> <span class="keyword">auto</span> chosen_action = r.get_action_id(); }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (rl.report_outcome(<span class="stringliteral">"event_id"</span>, 1.0f, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> basic_usage_multistep()</div>
<div class="line">{</div>
<div class="line"> u::configuration config;</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (load_config_from_json(<span class="stringliteral">"client.json"</span>, config) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << <span class="stringliteral">"Unable to Load file: client.json"</span> << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> r::api_status status;</div>
<div class="line"> </div>
<div class="line"> r::multistep_loop rl(config);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (rl.init(&status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> r::episode_state episode1(<span class="stringliteral">"my_episode_id_1"</span>);</div>
<div class="line"> r::episode_state episode2(<span class="stringliteral">"my_episode_id_2"</span>);</div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <span class="keyword">const</span> std::string context1 = R<span class="stringliteral">"({"shared":{"F1": 1.0}, "_multi": [{"AF1": 2.0}, {"AF1": 3.0}]})";</span></div>
<div class="line"><span class="stringliteral"> r::ranking_response response1;</span></div>
<div class="line"><span class="stringliteral"> </span><span class="keywordflow">if</span> (rl.request_episodic_decision(<span class="stringliteral">"event1"</span>, <span class="keyword">nullptr</span>, context1.c_str(), response1, episode1, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <span class="keyword">const</span> std::string context1 = R<span class="stringliteral">"({"shared":{"F2": 1.0}, "_multi": [{"AF2": 2.0}, {"AF2": 3.0}]})";</span></div>
<div class="line"><span class="stringliteral"> r::ranking_response response1;</span></div>
<div class="line"><span class="stringliteral"> </span><span class="keywordflow">if</span> (rl.request_episodic_decision(<span class="stringliteral">"event1"</span>, <span class="keyword">nullptr</span>, context1.c_str(), response1, episode2, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <span class="keyword">const</span> std::string context2 = R<span class="stringliteral">"({"shared":{"F1": 4.0}, "_multi": [{"AF1": 2.0}, {"AF1": 3.0}]})";</span></div>
<div class="line"><span class="stringliteral"> r::ranking_response response2;</span></div>
<div class="line"><span class="stringliteral"> </span><span class="keywordflow">if</span> (rl.request_episodic_decision(<span class="stringliteral">"event2"</span>, <span class="stringliteral">"event1"</span>, context2.c_str(), response2, episode1, &status) !=</div>
<div class="line"> err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <span class="keyword">const</span> std::string context2 = R<span class="stringliteral">"({"shared":{"F2": 4.0}, "_multi": [{"AF2": 2.0}, {"AF2": 3.0}]})";</span></div>
<div class="line"><span class="stringliteral"> r::ranking_response response2;</span></div>
<div class="line"><span class="stringliteral"> </span><span class="keywordflow">if</span> (rl.request_episodic_decision(<span class="stringliteral">"event2"</span>, <span class="stringliteral">"event1"</span>, context2.c_str(), response2, episode2, &status) !=</div>
<div class="line"> err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <span class="keywordflow">if</span> (rl.report_outcome(episode1.get_episode_id(), <span class="stringliteral">"event1"</span>, 1.0f, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <span class="keywordflow">if</span> (rl.report_outcome(episode2.get_episode_id(), <span class="stringliteral">"event2"</span>, 1.0f, &status) != err::success)</div>
<div class="line"> {</div>
<div class="line"> std::cout << status.get_error_msg() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> -1;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="comment">// Helper methods</span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> load_config_from_json(<span class="keyword">const</span> std::string& file_name, u::configuration& config)</div>
<div class="line">{</div>
<div class="line"> std::string config_str;</div>
<div class="line"> <span class="comment">// Load contents of config file into a string</span></div>
<div class="line"> <span class="keyword">const</span> <span class="keyword">auto</span> scode = load_file(file_name, config_str);</div>
<div class="line"> <span class="keywordflow">if</span> (scode != 0) { <span class="keywordflow">return</span> scode; }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Use library supplied convenience method to parse json and build config object</span></div>
<div class="line"> <span class="comment">// namespace cfg=reinforcement_learning::utility::config;</span></div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> cfg::create_from_json(config_str, config);</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> load_file(<span class="keyword">const</span> std::string& file_name, std::string& config_str)</div>
<div class="line">{</div>
<div class="line"> std::ifstream fs;</div>
<div class="line"> fs.open(file_name);</div>
<div class="line"> <span class="keywordflow">if</span> (!fs.good()) { <span class="keywordflow">return</span> reinforcement_learning::error_code::invalid_argument; }</div>
<div class="line"> std::stringstream buffer;</div>
<div class="line"> buffer << fs.rdbuf();</div>
<div class="line"> config_str = buffer.str();</div>
<div class="line"> <span class="keywordflow">return</span> reinforcement_learning::error_code::success;</div>
<div class="line">}</div>
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