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| 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 | } | ||