szaszm commented on a change in pull request #743: Minificpp 1169 - Simplify C2 
metrics collection and reporting
URL: https://github.com/apache/nifi-minifi-cpp/pull/743#discussion_r393121094
 
 

 ##########
 File path: extensions/http-curl/tests/C2JstackTest.cpp
 ##########
 @@ -16,152 +16,63 @@
  * limitations under the License.
  */
 
-#include <sys/stat.h>
 #undef NDEBUG
-#include <cassert>
-#include <utility>
-#include <chrono>
-#include <fstream>
-#include <memory>
 #include <string>
-#include <thread>
-#include <type_traits>
-#include <vector>
-#include <iostream>
-#include <sstream>
-#include "HTTPClient.h"
-#include "InvokeHTTP.h"
 #include "TestBase.h"
-#include "utils/StringUtils.h"
-#include "core/Core.h"
-#include "core/logging/Logger.h"
-#include "core/ProcessGroup.h"
-#include "core/yaml/YamlConfiguration.h"
-#include "FlowController.h"
-#include "properties/Configure.h"
-#include "unit/ProvenanceTestHelper.h"
-#include "io/StreamFactory.h"
-#include "c2/C2Agent.h"
-#include "CivetServer.h"
-#include <cstring>
-#include "protocols/RESTSender.h"
+#include "HTTPIntegrationBase.h"
+#include "HTTPHandlers.h"
 
-void waitToVerifyProcessor() {
-  std::this_thread::sleep_for(std::chrono::seconds(10));
-}
-
-
-class ConfigHandler : public CivetHandler {
+class VerifyC2DescribeJstack : public VerifyC2Describe {
  public:
-  ConfigHandler() {
-    calls_ = 0;
-  }
-  bool handlePost(CivetServer *server, struct mg_connection *conn) {
-    calls_++;
-    std::string heartbeat_response = "{\"operation\" : 
\"heartbeat\",\"requested_operations\": [  {"
-          "\"operation\" : \"describe\", "
-          "\"operationid\" : \"8675309\", "
-          "\"name\": \"jstack\""
-          "}]}";
-      mg_printf(conn, "HTTP/1.1 200 OK\r\nContent-Type: "
-                "text/plain\r\nContent-Length: %lu\r\nConnection: 
close\r\n\r\n",
-                heartbeat_response.length());
-      mg_printf(conn, "%s", heartbeat_response.c_str());
-
-
-    return true;
+  explicit VerifyC2DescribeJstack(bool isSecure)
+      : VerifyC2Describe(isSecure) {
   }
 
-  bool handleGet(CivetServer *server, struct mg_connection *conn) {
-    std::ifstream myfile(test_file_location_.c_str());
-
-    if (myfile.is_open()) {
-      std::stringstream buffer;
-      buffer << myfile.rdbuf();
-      std::string str = buffer.str();
-      myfile.close();
-      mg_printf(conn, "HTTP/1.1 200 OK\r\nContent-Type: "
-                "text/plain\r\nContent-Length: %lu\r\nConnection: 
close\r\n\r\n",
-                str.length());
-      mg_printf(conn, "%s", str.c_str());
-    } else {
-      mg_printf(conn, "HTTP/1.1 500 Internal Server Error\r\n");
-    }
-
-    return true;
+  virtual void runAssertions() {
+    assert(LogTestController::getInstance().contains("SchedulingAgent") == 
true);
   }
-  std::string test_file_location_;
-  std::atomic<size_t> calls_;
 };
 
-int main(int argc, char **argv) {
-  mg_init_library(0);
-  LogTestController::getInstance().setInfo<minifi::FlowController>();
-  LogTestController::getInstance().setDebug<minifi::utils::HTTPClient>();
-  LogTestController::getInstance().setDebug<minifi::c2::RESTSender>();
-  LogTestController::getInstance().setTrace<minifi::c2::C2Agent>();
+class DescribeJstackHandler : public HeartbeatHandler {
+ public:
+  explicit DescribeJstackHandler(bool isSecure)
+     : HeartbeatHandler(isSecure) {
+  }
 
-  const char *options[] = { "document_root", ".", "listening_ports", "0", 0 };
-  std::vector<std::string> cpp_options;
-  for (int i = 0; i < (sizeof(options) / sizeof(options[0]) - 1); i++) {
-    cpp_options.push_back(options[i]);
+  virtual void handleHeartbeat(const rapidjson::Document& root, struct 
mg_connection * conn) {
+    sendHeartbeatResponse("DESCRIBE", "jstack", "889398", conn);
   }
 
-  CivetServer server(cpp_options);
+  virtual void handleAcknowledge(const rapidjson::Document& root) {
+    assert(root.HasMember("Flowcontroller threadpool #0") == true);
+  }
 
-  std::string port_str = std::to_string(server.getListeningPorts()[0]);
+};
 
-  ConfigHandler h_ex;
-  server.addHandler("/update", h_ex);
-  std::string key_dir, test_file_location;
+int main(int argc, char **argv) {
+  std::string key_dir, test_file_location, url;
+  url = "http://localhost:0/api/heartbeat";;
   if (argc > 1) {
-    h_ex.test_file_location_ = test_file_location = argv[1];
-    key_dir = argv[2];
+    test_file_location = argv[1];
+    if (argc > 2) {
+      url = "https://localhost:0/api/heartbeat";;
+      key_dir = argv[2];
+    }
   }
 
+  bool isSecure = false;
+  if (url.find("https") != std::string::npos) {
+    isSecure = true;
+  }
 
-  std::shared_ptr<minifi::Configure> configuration = 
std::make_shared<minifi::Configure>();
-
-  std::string c2_rest_url = "http://localhost:"; + port_str + "/update";
-
-  configuration->set("c2.rest.url", c2_rest_url);
-  configuration->set("c2.agent.heartbeat.period", "1000");
-
-  std::shared_ptr<core::Repository> test_repo = 
std::make_shared<TestRepository>();
-  std::shared_ptr<core::Repository> test_flow_repo = 
std::make_shared<TestFlowRepository>();
-
-  configuration->set(minifi::Configure::nifi_flow_configuration_file, 
test_file_location);
-
-  std::shared_ptr<minifi::io::StreamFactory> stream_factory = 
minifi::io::StreamFactory::getInstance(configuration);
-  std::shared_ptr<core::ContentRepository> content_repo = 
std::make_shared<core::repository::VolatileContentRepository>();
-  std::unique_ptr<core::FlowConfiguration> yaml_ptr = 
std::unique_ptr<core::YamlConfiguration>(
-      new core::YamlConfiguration(test_repo, test_repo, content_repo, 
stream_factory, configuration, test_file_location));
-  std::shared_ptr<TestRepository> repo = 
std::static_pointer_cast<TestRepository>(test_repo);
-
-  std::shared_ptr<minifi::FlowController> controller = 
std::make_shared<minifi::FlowController>(test_repo, test_flow_repo, 
configuration, std::move(yaml_ptr), content_repo, DEFAULT_ROOT_GROUP_NAME,
-  true);
-
-  core::YamlConfiguration yaml_config(test_repo, test_repo, content_repo, 
stream_factory, configuration, test_file_location);
+  VerifyC2DescribeJstack harness(isSecure);
 
-  std::unique_ptr<core::ProcessGroup> ptr = 
yaml_config.getRoot(test_file_location);
-  std::shared_ptr<core::ProcessGroup> pg = 
std::shared_ptr<core::ProcessGroup>(ptr.get());
-  ptr.release();
-  auto start = std::chrono::system_clock::now();
+  harness.setKeyDir(key_dir);
 
-  controller->load();
-  controller->start();
-  waitToVerifyProcessor();
+  DescribeJstackHandler responder(isSecure);
 
-  controller->waitUnload(60000);
-  auto then = std::chrono::system_clock::now();
+  harness.setUrl(url, &responder);
 
-  auto milliseconds = 
std::chrono::duration_cast<std::chrono::milliseconds>(then - start).count();
-  std::string logs = LogTestController::getInstance().log_output.str();
-  #ifndef WIN32
-  assert(logs.find("SchedulingAgent") != std::string::npos);
-  #endif
-  LogTestController::getInstance().reset();
-  assert(h_ex.calls_ <= (milliseconds / 1000) + 1);
+  harness.run(test_file_location);
 
-  return 0;
 }
 
 Review comment:
   The new C2JstackTest sometimes crashes (segfault) during UUID generation, in 
`IdGenerator::generateWithUuidImpl` because `uuid_impl_` is null for some 
reason. I don't think the root cause is in your changes but we need to address 
this before merging.
   The interesting part of the backtrace:
   ```
   #4  0x0000555555dc4bf3 in 
org::apache::nifi::minifi::utils::IdGenerator::generateWithUuidImpl 
(this=0x5555566c5e70, mode=1, output=0x7ffff5720a40 "`\vr\365\377\177") at 
/home/szaszm/nifi-minifi-cpp-2/libminifi/src/utils/Id.cpp:288
   #5  0x0000555555dc4e6b in 
org::apache::nifi::minifi::utils::IdGenerator::generate (this=0x5555566c5e70, 
ident=...) at /home/szaszm/nifi-minifi-cpp-2/libminifi/src/utils/Id.cpp:332
   #6  0x0000555555bf5fc9 in 
org::apache::nifi::minifi::core::CoreComponent::CoreComponent 
(this=0x7ffff5720de0, name="HTTPClient") at 
/home/szaszm/nifi-minifi-cpp-2/libminifi/include/core/Core.h:166
   #7  0x0000555555d02989 in 
org::apache::nifi::minifi::core::Connectable::Connectable (this=0x7ffff5720de0, 
name="HTTPClient") at 
/home/szaszm/nifi-minifi-cpp-2/libminifi/src/core/Connectable.cpp:43
   #8  0x0000555555ee28b2 in 
org::apache::nifi::minifi::utils::HTTPClient::HTTPClient (this=0x7ffff5720d70, 
url="https://localhost:41931/api/heartbeat";, 
       
ssl_context_service=std::shared_ptr<org::apache::nifi::minifi::controllers::SSLContextService>
 (empty) = {...}) at 
/home/szaszm/nifi-minifi-cpp-2/extensions/http-curl/client/HTTPClient.cpp:51
   #9  0x0000555555edc383 in 
org::apache::nifi::minifi::c2::RESTSender::sendPayload (this=0x5555568e5b40, 
url="https://localhost:41931/api/heartbeat";, 
direction=org::apache::nifi::minifi::c2::TRANSMIT, payload=..., 
       outputConfig="{\n    \"operation\": \"heartbeat\",\n    \"agentInfo\": 
{\n        \"status\": {\n", ' ' <repeats 12 times>, "\"repositories\": {\n", ' 
' <repeats 16 times>, "\"ff\": {\n", ' ' <repeats 20 times>, "\"size\": 0,\n", 
' ' <repeats 20 times>, "\"running\": false,\n      "...) at 
/home/szaszm/nifi-minifi-cpp-2/extensions/http-curl/protocols/RESTSender.cpp:106
   #10 0x0000555555edbd61 in 
org::apache::nifi::minifi::c2::RESTSender::consumePayload (this=0x5555568e5b40, 
url="https://localhost:41931/api/heartbeat";, payload=..., 
direction=org::apache::nifi::minifi::c2::TRANSMIT, async=false)
       at 
/home/szaszm/nifi-minifi-cpp-2/extensions/http-curl/protocols/RESTSender.cpp:69
   #11 0x0000555555edbeab in 
org::apache::nifi::minifi::c2::RESTSender::consumePayload (this=0x5555568e5b40, 
payload=..., direction=org::apache::nifi::minifi::c2::TRANSMIT, async=false)
       at 
/home/szaszm/nifi-minifi-cpp-2/extensions/http-curl/protocols/RESTSender.cpp:76
   #12 0x0000555555c90ad2 in 
org::apache::nifi::minifi::c2::C2Agent::performHeartBeat (this=0x5555568db8b0) 
at /home/szaszm/nifi-minifi-cpp-2/libminifi/src/c2/C2Agent.cpp:318
   #13 0x0000555555c8dcbc in 
org::apache::nifi::minifi::c2::C2Agent::<lambda()>::operator()(void) const 
(__closure=0x7ffff5721b80) at 
/home/szaszm/nifi-minifi-cpp-2/libminifi/src/c2/C2Agent.cpp:100
   #14 0x0000555555c96478 in 
std::_Function_handler<org::apache::nifi::minifi::utils::TaskRescheduleInfo(), 
org::apache::nifi::minifi::c2::C2Agent::C2Agent(const 
std::shared_ptr<org::apache::nifi::minifi::core::controller::ControllerServiceProvider>&,
 const std::shared_ptr<org::apache::nifi::minifi::state::StateMonitor>&, const 
std::shared_ptr<org::apache::nifi::minifi::Configure>&, 
org::apache::nifi::minifi::utils::ThreadPool<org::apache::nifi::minifi::utils::TaskRescheduleInfo>&)::<lambda()>
 >::_M_invoke(const std::_Any_data &) (__functor=...) at 
/usr/include/c++/7/bits/std_function.h:302
   #15 0x0000555555ca6fc6 in 
std::function<org::apache::nifi::minifi::utils::TaskRescheduleInfo 
()>::operator()() const (this=0x7ffff5721b80) at 
/usr/include/c++/7/bits/std_function.h:706
   #16 0x0000555555ca6c13 in 
org::apache::nifi::minifi::utils::Worker<org::apache::nifi::minifi::utils::TaskRescheduleInfo>::run
 (this=0x7ffff5721b50) at 
/home/szaszm/nifi-minifi-cpp-2/libminifi/include/utils/ThreadPool.h:97
   ```

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