Showing the changes to Source/Libraries/TimeSeriesPlatformLibrary/Samples/SimpleSubscribe.cpp (1 of 25 files). Show all
Unified · Split
| @@ -0,0 +1,130 @@ | ||
| 1 | +//****************************************************************************************************** | |
| 2 | +// SimpleSubscribe.cpp - Gbtc | |
| 3 | +// | |
| 4 | +// Copyright � 2010, Grid Protection Alliance. All Rights Reserved. | |
| 5 | +// | |
| 6 | +// Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See | |
| 7 | +// the NOTICE file distributed with this work for additional information regarding copyright ownership. | |
| 8 | +// The GPA licenses this file to you under the Eclipse Public License -v 1.0 (the "License"); you may | |
| 9 | +// not use this file except in compliance with the License. You may obtain a copy of the License at: | |
| 10 | +// | |
| 11 | +// http://www.opensource.org/licenses/eclipse-1.0.php | |
| 12 | +// | |
| 13 | +// Unless agreed to in writing, the subject software distributed under the License is distributed on an | |
| 14 | +// "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the | |
| 15 | +// License for the specific language governing permissions and limitations. | |
| 16 | +// | |
| 17 | +// Code Modification History: | |
| 18 | +// ---------------------------------------------------------------------------------------------------- | |
| 19 | +// 04/05/2012 - Stephen C. Wills | |
| 20 | +// Generated original version of source code. | |
| 21 | +// | |
| 22 | +//****************************************************************************************************** | |
| 23 | + | |
| 24 | +#include <iostream> | |
| 25 | +#include <string> | |
| 26 | +#include <vector> | |
| 27 | + | |
| 28 | +#include "../Common/Convert.h" | |
| 29 | +#include "../Common/Measurement.h" | |
| 30 | +#include "../Transport/DataSubscriber.h" | |
| 31 | + | |
| 32 | +namespace gsfts = GSF::TimeSeries; | |
| 33 | +namespace tst = gsfts::Transport; | |
| 34 | + | |
| 35 | +tst::DataSubscriber Subscriber; | |
| 36 | + | |
| 37 | +void RunSubscriber(std::string hostname, gsfts::uint16_t port); | |
| 38 | +void ProcessMeasurements(std::vector<gsfts::Measurement> newMeasurements); | |
| 39 | + | |
| 40 | +// Sample application to demonstrate the most simple use of the subscriber API. | |
| 41 | +// | |
| 42 | +// This application accepts the hostname and port of the publisher via command | |
| 43 | +// line arguments, connects to the publisher, subscribes, and displays information | |
| 44 | +// about the measurements it receives. It assumes that the publisher is providing | |
| 45 | +// fourteen measurements (PPA:1 through PPA:14) and that the publisher is running | |
| 46 | +// smoothly (no reconnection attempts are made if the connection fails). | |
| 47 | +// | |
| 48 | +// Measurements are transmitted via the TCP command channel. | |
| 49 | +int main(int argc, char* argv[]) | |
| 50 | +{ | |
| 51 | + std::string hostname; | |
| 52 | + gsfts::uint16_t port; | |
| 53 | + | |
| 54 | + // Ensure that the necessary | |
| 55 | + // command line arguments are given. | |
| 56 | + if (argc < 3) | |
| 57 | + { | |
| 58 | + std::cout << "Usage:" << std::endl; | |
| 59 | + std::cout << " SimpleSubscribe HOSTNAME PORT" << std::endl; | |
| 60 | + return 0; | |
| 61 | + } | |
| 62 | + | |
| 63 | + // Get hostname and port. | |
| 64 | + hostname = argv[1]; | |
| 65 | + std::stringstream(argv[2]) >> port; | |
| 66 | + | |
| 67 | + // Run the subscriber. | |
| 68 | + RunSubscriber(hostname, port); | |
| 69 | + | |
| 70 | + // Wait until the user presses enter before quitting. | |
| 71 | + std::string line; | |
| 72 | + std::getline(std::cin, line); | |
| 73 | + | |
| 74 | + // Disconnect the subscriber to stop background threads. | |
| 75 | + Subscriber.Disconnect(); | |
| 76 | + | |
| 77 | + return 0; | |
| 78 | +} | |
| 79 | + | |
| 80 | +// The proper procedure when creating and running a subscriber is: | |
| 81 | +// - Create subscriber | |
| 82 | +// - Register callbacks | |
| 83 | +// - Connect to publisher | |
| 84 | +// - Subscribe | |
| 85 | +void RunSubscriber(std::string hostname, gsfts::uint16_t port) | |
| 86 | +{ | |
| 87 | + // SubscriptionInfo is a helper object which allows the user | |
| 88 | + // to set up their subscription and reuse subscription settings. | |
| 89 | + tst::SubscriptionInfo info; | |
| 90 | + info.FilterExpression = "PPA:1;PPA:2;PPA:3;PPA:4;PPA:5;PPA:6;PPA:7;PPA:8;PPA:9;PPA:10;PPA:11;PPA:12;PPA:13;PPA:14"; | |
| 91 | + | |
| 92 | + Subscriber.RegisterNewMeasurementsCallback(&ProcessMeasurements); | |
| 93 | + Subscriber.Connect(hostname, port); | |
| 94 | + Subscriber.Subscribe(info); | |
| 95 | +} | |
| 96 | + | |
| 97 | +// Callback which is called when the subscriber has | |
| 98 | +// received a new packet of measurements from the publisher. | |
| 99 | +void ProcessMeasurements(std::vector<gsfts::Measurement> newMeasurements) | |
| 100 | +{ | |
| 101 | + const std::string TimestampFormat = "%Y-%m-%d %H:%M:%S.%f"; | |
| 102 | + const std::size_t MaxTimestampSize = 80; | |
| 103 | + | |
| 104 | + static int processCount = 0; | |
| 105 | + std::size_t i; | |
| 106 | + | |
| 107 | + char timestamp[MaxTimestampSize]; | |
| 108 | + | |
| 109 | + // Only display messages every five | |
| 110 | + // seconds (assuming 30 calls per second). | |
| 111 | + if (processCount % 150 == 0) | |
| 112 | + { | |
| 113 | + std::cout << Subscriber.GetTotalMeasurementsReceived() << " measurements received so far..." << std::endl; | |
| 114 | + | |
| 115 | + if (newMeasurements.size() > 0) | |
| 116 | + { | |
| 117 | + if (gsfts::TicksToString(timestamp, MaxTimestampSize, TimestampFormat, newMeasurements[0].Timestamp)) | |
| 118 | + std::cout << "Timestamp: " << std::string(timestamp) << std::endl; | |
| 119 | + | |
| 120 | + std::cout << "Point\tValue" << std::endl; | |
| 121 | + | |
| 122 | + for (i = 0; i < newMeasurements.size(); ++i) | |
| 123 | + std::cout << newMeasurements[i].ID << '\t' << newMeasurements[i].Value << std::endl; | |
| 124 | + | |
| 125 | + std::cout << std::endl; | |
| 126 | + } | |
| 127 | + } | |
| 128 | + | |
| 129 | + ++processCount; | |
| 130 | +} | |