|  | @@ -16,6 +16,7 @@
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				|  |  |   *
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				|  |  |   */
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				|  |  |  
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				|  |  | +#include <fstream>
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				|  |  |  #include <iostream>
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				|  |  |  #include <memory>
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				|  |  |  #include <set>
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				|  | @@ -57,6 +58,8 @@ DEFINE_string(qps_server_target_override, "",
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				|  |  |                "Override QPS server target to configure in client configs."
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				|  |  |                "Only applicable if there is a single benchmark server.");
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				|  |  |  
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				|  |  | +DEFINE_string(json_file_out, "", "File to write the JSON output to.");
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				|  |  | +
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				|  |  |  namespace grpc {
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				|  |  |  namespace testing {
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				|  |  |  
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				|  | @@ -88,6 +91,13 @@ static std::unique_ptr<ScenarioResult> RunAndReport(const Scenario& scenario,
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				|  |  |      *success = result->server_success(i);
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				|  |  |    }
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				|  |  |  
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				|  |  | +  if (FLAGS_json_file_out != "") {
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				|  |  | +    std::ofstream json_outfile;
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				|  |  | +    json_outfile.open(FLAGS_json_file_out);
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				|  |  | +    json_outfile << "{\"qps\": " << result->summary().qps() << "}\n";
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				|  |  | +    json_outfile.close();
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				|  |  | +  }
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				|  |  | +
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				|  |  |    return result;
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				|  |  |  }
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				|  |  |  
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