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PubSub.cpp
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/*
* Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
/**
* @file PubSub.cpp
* @brief Sample demonstrating MQTT operations
*
*/
#include <chrono>
#include <cstring>
#ifdef USE_WEBSOCKETS
#include "WebSocketConnection.hpp"
#elif defined USE_MBEDTLS
#include "MbedTLSConnection.hpp"
#else
#include "OpenSSLConnection.hpp"
#endif
#include "util/logging/Logging.hpp"
#include "util/logging/LogMacros.hpp"
#include "util/logging/ConsoleLogSystem.hpp"
#include "ConfigCommon.hpp"
#include "PubSub.hpp"
#define LOG_TAG_PUBSUB "[Sample - PubSub]"
#define MESSAGE_COUNT 5
#define SDK_SAMPLE_TOPIC "sdk/test/cpp"
namespace awsiotsdk {
namespace samples {
ResponseCode PubSub::RunPublish(int msg_count) {
std::cout << std::endl
<< "******************************Entering Publish with no queuing delay unless queue is full!!**************************"
<< std::endl;
ResponseCode rc;
uint16_t packet_id = 0;
int itr = 1;
util::String p_topic_name_str = SDK_SAMPLE_TOPIC;
do {
util::String payload = "Hello from SDK : ";
payload.append(std::to_string(itr));
std::cout << "Publish Payload : " << payload << std::endl;
std::unique_ptr<Utf8String> p_topic_name = Utf8String::Create(p_topic_name_str);
rc = p_iot_client_->PublishAsync(std::move(p_topic_name), false, false, mqtt::QoS::QOS1,
payload, nullptr, packet_id);
if (ResponseCode::SUCCESS == rc) {
cur_pending_messages_++;
total_published_messages_++;
std::cout << "Publish Packet Id : " << packet_id << std::endl;
} else if (ResponseCode::ACTION_QUEUE_FULL == rc) {
itr--;
std::this_thread::sleep_for(std::chrono::milliseconds(1000));
}
} while (++itr <= msg_count && (ResponseCode::SUCCESS == rc || ResponseCode::ACTION_QUEUE_FULL == rc));
return rc;
}
ResponseCode PubSub::SubscribeCallback(util::String topic_name,
util::String payload,
std::shared_ptr<mqtt::SubscriptionHandlerContextData> p_app_handler_data) {
std::cout << std::endl << "************" << std::endl;
std::cout << "Received message on topic : " << topic_name << std::endl;
std::cout << "Payload Length : " << payload.length() << std::endl;
if (payload.length() < 50) {
std::cout << "Payload : " << payload << std::endl;
}
std::cout << std::endl << "************" << std::endl;
cur_pending_messages_--;
return ResponseCode::SUCCESS;
}
ResponseCode PubSub::DisconnectCallback(util::String client_id,
std::shared_ptr<DisconnectCallbackContextData> p_app_handler_data) {
std::cout << "*******************************************" << std::endl
<< client_id << " Disconnected!" << std::endl
<< "*******************************************" << std::endl;
return ResponseCode::SUCCESS;
}
ResponseCode PubSub::ReconnectCallback(util::String client_id,
std::shared_ptr<ReconnectCallbackContextData> p_app_handler_data,
ResponseCode reconnect_result) {
std::cout << "*******************************************" << std::endl
<< client_id << " Reconnect Attempted. Result " << ResponseHelper::ToString(reconnect_result)
<< std::endl
<< "*******************************************" << std::endl;
return ResponseCode::SUCCESS;
}
ResponseCode PubSub::ResubscribeCallback(util::String client_id,
std::shared_ptr<ResubscribeCallbackContextData> p_app_handler_data,
ResponseCode resubscribe_result) {
std::cout << "*******************************************" << std::endl
<< client_id << " Resubscribe Attempted. Result" << ResponseHelper::ToString(resubscribe_result)
<< std::endl
<< "*******************************************" << std::endl;
return ResponseCode::SUCCESS;
}
ResponseCode PubSub::Subscribe() {
util::String p_topic_name_str = SDK_SAMPLE_TOPIC;
std::unique_ptr<Utf8String> p_topic_name = Utf8String::Create(p_topic_name_str);
mqtt::Subscription::ApplicationCallbackHandlerPtr p_sub_handler = std::bind(&PubSub::SubscribeCallback,
this,
std::placeholders::_1,
std::placeholders::_2,
std::placeholders::_3);
std::shared_ptr<mqtt::Subscription> p_subscription =
mqtt::Subscription::Create(std::move(p_topic_name), mqtt::QoS::QOS0, p_sub_handler, nullptr);
util::Vector<std::shared_ptr<mqtt::Subscription>> topic_vector;
topic_vector.push_back(p_subscription);
ResponseCode rc = p_iot_client_->Subscribe(topic_vector, ConfigCommon::mqtt_command_timeout_);
std::this_thread::sleep_for(std::chrono::seconds(3));
return rc;
}
ResponseCode PubSub::Unsubscribe() {
util::String p_topic_name_str = SDK_SAMPLE_TOPIC;
std::unique_ptr<Utf8String> p_topic_name = Utf8String::Create(p_topic_name_str);
util::Vector<std::unique_ptr<Utf8String>> topic_vector;
topic_vector.push_back(std::move(p_topic_name));
ResponseCode rc = p_iot_client_->Unsubscribe(std::move(topic_vector), ConfigCommon::mqtt_command_timeout_);
std::this_thread::sleep_for(std::chrono::seconds(1));
return rc;
}
ResponseCode PubSub::InitializeTLS() {
ResponseCode rc = ResponseCode::SUCCESS;
#ifdef USE_WEBSOCKETS
p_network_connection_ = std::shared_ptr<NetworkConnection>(
new network::WebSocketConnection(ConfigCommon::endpoint_, ConfigCommon::endpoint_https_port_,
ConfigCommon::root_ca_path_, ConfigCommon::aws_region_,
ConfigCommon::aws_access_key_id_,
ConfigCommon::aws_secret_access_key_,
ConfigCommon::aws_session_token_,
ConfigCommon::tls_handshake_timeout_,
ConfigCommon::tls_read_timeout_,
ConfigCommon::tls_write_timeout_, true));
if (nullptr == p_network_connection_) {
AWS_LOG_ERROR(LOG_TAG_PUBSUB, "Failed to initialize Network Connection. %s",
ResponseHelper::ToString(rc).c_str());
rc = ResponseCode::FAILURE;
}
#elif defined USE_MBEDTLS
p_network_connection_ = std::make_shared<network::MbedTLSConnection>(ConfigCommon::endpoint_,
ConfigCommon::endpoint_mqtt_port_,
ConfigCommon::root_ca_path_,
ConfigCommon::client_cert_path_,
ConfigCommon::client_key_path_,
ConfigCommon::tls_handshake_timeout_,
ConfigCommon::tls_read_timeout_,
ConfigCommon::tls_write_timeout_,
true);
if (nullptr == p_network_connection_) {
AWS_LOG_ERROR(LOG_TAG_PUBSUB, "Failed to initialize Network Connection. %s",
ResponseHelper::ToString(rc).c_str());
rc = ResponseCode::FAILURE;
}
#else
std::shared_ptr<network::OpenSSLConnection> p_network_connection =
std::make_shared<network::OpenSSLConnection>(ConfigCommon::endpoint_,
ConfigCommon::endpoint_mqtt_port_,
ConfigCommon::root_ca_path_,
ConfigCommon::client_cert_path_,
ConfigCommon::client_key_path_,
ConfigCommon::tls_handshake_timeout_,
ConfigCommon::tls_read_timeout_,
ConfigCommon::tls_write_timeout_, true);
rc = p_network_connection->Initialize();
if (ResponseCode::SUCCESS != rc) {
AWS_LOG_ERROR(LOG_TAG_PUBSUB,
"Failed to initialize Network Connection. %s",
ResponseHelper::ToString(rc).c_str());
rc = ResponseCode::FAILURE;
} else {
p_network_connection_ = std::dynamic_pointer_cast<NetworkConnection>(p_network_connection);
}
#endif
return rc;
}
ResponseCode PubSub::RunSample() {
total_published_messages_ = 0;
cur_pending_messages_ = 0;
ResponseCode rc = InitializeTLS();
if (ResponseCode::SUCCESS != rc) {
return rc;
}
ClientCoreState::ApplicationDisconnectCallbackPtr p_disconnect_handler =
std::bind(&PubSub::DisconnectCallback, this, std::placeholders::_1, std::placeholders::_2);
ClientCoreState::ApplicationReconnectCallbackPtr p_reconnect_handler =
std::bind(&PubSub::ReconnectCallback,
this,
std::placeholders::_1,
std::placeholders::_2,
std::placeholders::_3);
ClientCoreState::ApplicationResubscribeCallbackPtr p_resubscribe_handler =
std::bind(&PubSub::ResubscribeCallback,
this,
std::placeholders::_1,
std::placeholders::_2,
std::placeholders::_3);
p_iot_client_ = std::shared_ptr<MqttClient>(MqttClient::Create(p_network_connection_,
ConfigCommon::mqtt_command_timeout_,
p_disconnect_handler, nullptr,
p_reconnect_handler, nullptr,
p_resubscribe_handler, nullptr));
if (nullptr == p_iot_client_) {
return ResponseCode::FAILURE;
}
util::String client_id_tagged = ConfigCommon::base_client_id_;
client_id_tagged.append("_pub_sub_tester_");
client_id_tagged.append(std::to_string(rand()));
std::unique_ptr<Utf8String> client_id = Utf8String::Create(client_id_tagged);
rc = p_iot_client_->Connect(ConfigCommon::mqtt_command_timeout_, ConfigCommon::is_clean_session_,
mqtt::Version::MQTT_3_1_1, ConfigCommon::keep_alive_timeout_secs_,
std::move(client_id), nullptr, nullptr, nullptr);
if (ResponseCode::MQTT_CONNACK_CONNECTION_ACCEPTED != rc) {
return rc;
}
rc = Subscribe();
if (ResponseCode::SUCCESS != rc) {
AWS_LOG_ERROR(LOG_TAG_PUBSUB, "Subscribe failed. %s", ResponseHelper::ToString(rc).c_str());
} else {
// Test with delay between each action being queued up
rc = RunPublish(MESSAGE_COUNT);
if (ResponseCode::SUCCESS != rc) {
std::cout << std::endl << "Publish runner failed. " << ResponseHelper::ToString(rc) << std::endl;
AWS_LOG_ERROR(LOG_TAG_PUBSUB, "Publish runner failed. %s",
ResponseHelper::ToString(rc).c_str());
p_iot_client_->Disconnect(ConfigCommon::mqtt_command_timeout_);
}
std::cout << ResponseHelper::ToString(rc) << std::endl;
if (ResponseCode::SUCCESS == rc) {
//Sleep for 10 seconds and wait for all messages to be received
int cur_sleep_sec_count = 0;
do {
std::this_thread::sleep_for(std::chrono::milliseconds(100));
if (0 == cur_pending_messages_) {
break;
}
cur_sleep_sec_count++;
std::cout << "Waiting!!! " << cur_sleep_sec_count << std::endl;
} while (cur_sleep_sec_count < 100);
}
do {
rc = Unsubscribe();
if (ResponseCode::ACTION_QUEUE_FULL == rc) {
std::cout << "Message queue full on Unsub, waiting!!!" << std::endl;
std::this_thread::sleep_for(std::chrono::milliseconds(1000));
}
} while (ResponseCode::ACTION_QUEUE_FULL == rc);
if (ResponseCode::SUCCESS != rc) {
AWS_LOG_ERROR(LOG_TAG_PUBSUB, "Unsubscribe failed. %s",
ResponseHelper::ToString(rc).c_str());
}
}
rc = p_iot_client_->Disconnect(ConfigCommon::mqtt_command_timeout_);
if (ResponseCode::SUCCESS != rc) {
AWS_LOG_ERROR(LOG_TAG_PUBSUB, "Disconnect failed. %s", ResponseHelper::ToString(rc).c_str());
}
std::cout << std::endl << "*************************Results**************************" << std::endl;
std::cout << "Pending published messages : " << cur_pending_messages_ << std::endl;
std::cout << "Total published messages : " << total_published_messages_ << std::endl;
std::cout << "Exiting Sample!!!!" << std::endl;
return ResponseCode::SUCCESS;
}
}
}
int main(int argc, char **argv) {
std::shared_ptr<awsiotsdk::util::Logging::ConsoleLogSystem> p_log_system =
std::make_shared<awsiotsdk::util::Logging::ConsoleLogSystem>(awsiotsdk::util::Logging::LogLevel::Info);
awsiotsdk::util::Logging::InitializeAWSLogging(p_log_system);
std::unique_ptr<awsiotsdk::samples::PubSub>
pub_sub = std::unique_ptr<awsiotsdk::samples::PubSub>(new awsiotsdk::samples::PubSub());
awsiotsdk::ResponseCode rc = awsiotsdk::ConfigCommon::InitializeCommon("config/SampleConfig.json");
if (awsiotsdk::ResponseCode::SUCCESS == rc) {
rc = pub_sub->RunSample();
}
#ifdef WIN32
std::cout<<"Press any key to continue!!!!"<<std::endl;
getchar();
#endif
awsiotsdk::util::Logging::ShutdownAWSLogging();
return static_cast<int>(rc);
}