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| 1 | +//****************************************************************************************************** | |
| 2 | +// SimpleSubscribe.java - 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 | +// 04/19/2012 - Stephen C. Wills | |
| 20 | +// Generated original version of source code. | |
| 21 | +// | |
| 22 | +//****************************************************************************************************** | |
| 23 | + | |
| 24 | +package org.gpa.tsf.sample; | |
| 25 | + | |
| 26 | +import java.io.IOException; | |
| 27 | +import java.util.Scanner; | |
| 28 | + | |
| 29 | +import org.gpa.tsf.transport.DataSubscriber; | |
| 30 | +import org.gpa.tsf.transport.SubscriptionInfo; | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * Provides an example of how to use the Subscriber API. | |
| 34 | + * | |
| 35 | + * @see DataSubscriber | |
| 36 | + */ | |
| 37 | +public class SimpleSubscribe | |
| 38 | +{ | |
| 39 | + private static DataSubscriber s_subscriber; | |
| 40 | + | |
| 41 | + /** | |
| 42 | + * Main method. Entry point into the program. | |
| 43 | + * | |
| 44 | + * @param args command line arguments | |
| 45 | + */ | |
| 46 | + public static void main(String[] args) | |
| 47 | + { | |
| 48 | + String hostname; | |
| 49 | + int port; | |
| 50 | + | |
| 51 | + // Ensure that the necessary | |
| 52 | + // command line arguments are given | |
| 53 | + if (args.length < 2) | |
| 54 | + { | |
| 55 | + System.err.println("Error: requires two command line arguments"); | |
| 56 | + System.err.println(" 1. hostname of publisher"); | |
| 57 | + System.err.println(" 2. port used to initiate connection"); | |
| 58 | + return; | |
| 59 | + } | |
| 60 | + | |
| 61 | + // Get hostname and port | |
| 62 | + hostname = args[0]; | |
| 63 | + port = Integer.parseInt(args[1]); | |
| 64 | + | |
| 65 | + // Run the subscriber | |
| 66 | + runSubscriber(hostname, port); | |
| 67 | + | |
| 68 | + // Wait until user presses enter before quitting | |
| 69 | + waitForUserInput(); | |
| 70 | + | |
| 71 | + // Disconnect the subscriber to stop background threads | |
| 72 | + if (s_subscriber != null) | |
| 73 | + s_subscriber.disconnect(); | |
| 74 | + } | |
| 75 | + | |
| 76 | + // The proper procedure when creating and running a subscriber is: | |
| 77 | + // - Create subscriber | |
| 78 | + // - Add listeners | |
| 79 | + // - Connect to publisher | |
| 80 | + // - Subscribe | |
| 81 | + private static void runSubscriber(String hostname, int port) | |
| 82 | + { | |
| 83 | + try | |
| 84 | + { | |
| 85 | + s_subscriber = new DataSubscriber(); | |
| 86 | + s_subscriber.addSubscriberListener(new SampleSubscriberListener()); | |
| 87 | + s_subscriber.connect(hostname, port); | |
| 88 | + s_subscriber.subscribe(createSubscriptionInfo()); | |
| 89 | + } | |
| 90 | + catch (IOException ex) | |
| 91 | + { | |
| 92 | + ex.printStackTrace(); | |
| 93 | + } | |
| 94 | + } | |
| 95 | + | |
| 96 | + // SubscriptionInfo is a helper object which allows the user | |
| 97 | + // to set up their subscription and reuse subscription settings | |
| 98 | + private static SubscriptionInfo createSubscriptionInfo() | |
| 99 | + { | |
| 100 | + SubscriptionInfo info = new SubscriptionInfo(); | |
| 101 | + info.setFilterExpression("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"); | |
| 102 | + return info; | |
| 103 | + } | |
| 104 | + | |
| 105 | + // Waits for the user to press Enter before proceeding | |
| 106 | + private static void waitForUserInput() | |
| 107 | + { | |
| 108 | + Scanner scan = new Scanner(System.in); | |
| 109 | + scan.nextLine(); | |
| 110 | + } | |
| 111 | +} | |