[6983] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[17181] | 3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[6983] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.ServiceModel;
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| 24 | using HeuristicLab.Clients.Hive.SlaveCore.ServiceContracts;
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| 25 | using HeuristicLab.Clients.Hive.SlaveCore.Views.Properties;
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| 26 | using HeuristicLab.Common;
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| 27 | using HeuristicLab.Core;
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| 28 |
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| 29 | namespace HeuristicLab.Clients.Hive.SlaveCore.Views {
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| 30 |
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| 31 | public enum SlaveDisplayStat {
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| 32 | Offline, // not connected to Hive
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| 33 | Idle, // slave has no jobs to calculate
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| 34 | Busy, // jobs are currently running on slave
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| 35 | Asleep, // we are not accepting jobs at the moment
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| 36 | NoService // the slave windows service is currently not running
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| 37 | }
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| 38 |
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| 39 | public enum CoreConnection {
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| 40 | Connected,
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| 41 | Offline
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| 42 | }
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| 43 |
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[7185] | 44 | [CallbackBehavior(ConcurrencyMode = ConcurrencyMode.Reentrant, UseSynchronizationContext = false)]
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[6983] | 45 | [Item("SlaveItem", "Represents a slave which receives messages from the core")]
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| 46 | public class SlaveItem : Item, ISlaveCommunicationCallbacks, IDisposable {
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| 47 | private ISlaveCommunication pipeProxy;
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| 48 | private DuplexChannelFactory<ISlaveCommunication> pipeFactory;
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| 49 | private int lastJobsFetched = 0;
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| 50 |
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| 51 | public SlaveItem() {
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| 52 | }
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| 53 |
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| 54 | private void RegisterEvents() {
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| 55 | pipeFactory.Faulted += new EventHandler(pipeFactory_Faulted);
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| 56 | pipeFactory.Closed += new EventHandler(pipeFactory_Closed);
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| 57 | pipeFactory.Opened += new EventHandler(pipeFactory_Opened);
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| 58 | }
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| 59 |
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| 60 | private void DeregisterEvents() {
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| 61 | pipeFactory.Faulted -= new EventHandler(pipeFactory_Faulted);
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| 62 | pipeFactory.Closed -= new EventHandler(pipeFactory_Closed);
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| 63 | pipeFactory.Opened -= new EventHandler(pipeFactory_Opened);
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| 64 | }
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| 65 |
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| 66 | void pipeFactory_Opened(object sender, EventArgs e) {
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| 67 | OnMessageLogged("Connection to Slave core opened");
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| 68 | OnCoreConnectionChanged(CoreConnection.Connected);
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| 69 | }
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| 70 |
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| 71 | void pipeFactory_Closed(object sender, EventArgs e) {
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| 72 | OnMessageLogged("Connection to Slave core closed");
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| 73 | OnCoreConnectionChanged(CoreConnection.Offline);
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| 74 | }
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| 75 |
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| 76 | void pipeFactory_Faulted(object sender, EventArgs e) {
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| 77 | OnMessageLogged("Connection to Slave core faulted");
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| 78 | OnCoreConnectionChanged(CoreConnection.Offline);
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| 79 | }
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| 80 |
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| 81 | public void Open() {
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| 82 | try {
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| 83 | pipeFactory = new DuplexChannelFactory<ISlaveCommunication>(this, Settings.Default.SlaveCommunicationServiceEndpoint);
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| 84 | RegisterEvents();
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| 85 | }
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| 86 | catch (Exception ex) {
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| 87 | OnMessageLogged("Error establishing connection to Core. Are you missing a configuration file?" + Environment.NewLine + ex.ToString());
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| 88 | }
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| 89 | }
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| 90 |
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| 91 | public bool ReconnectToSlaveCore() {
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| 92 | try {
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[7135] | 93 | DeregisterEvents();
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[6983] | 94 | pipeProxy = pipeFactory.CreateChannel();
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| 95 | StatusCommons st = pipeProxy.Subscribe();
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| 96 | if (st != null) {
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[7135] | 97 | RegisterEvents();
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[6983] | 98 | OnStatusChanged(st);
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| 99 | return true;
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| 100 | } else {
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| 101 | return false;
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| 102 | }
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| 103 | }
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| 104 | catch (Exception) {
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| 105 | OnMessageLogged("Couldn't connect to Slave core. Is it possible that the core isn't running?");
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| 106 | return false;
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | public bool IsClosed() {
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| 111 | if (pipeFactory == null) return true;
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| 112 | return pipeFactory.State == CommunicationState.Closed || pipeFactory.State == CommunicationState.Faulted;
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| 113 | }
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| 114 |
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| 115 | public void PauseAll() {
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| 116 | try {
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| 117 | if (pipeFactory.State != CommunicationState.Faulted && pipeFactory.State != CommunicationState.Closed)
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| 118 | pipeProxy.PauseAll();
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| 119 | }
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| 120 | catch (Exception e) {
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| 121 | OnMessageLogged("Error soft pausening core: " + e.ToString());
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| 122 | }
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| 123 | }
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| 124 |
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| 125 | public void StopAll() {
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| 126 | try {
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| 127 | if (pipeFactory.State != CommunicationState.Faulted && pipeFactory.State != CommunicationState.Closed)
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| 128 | pipeProxy.StopAll();
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| 129 | }
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| 130 | catch (Exception e) {
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| 131 | OnMessageLogged("Error hard pausening core: " + e.ToString());
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| 132 | }
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| 133 | }
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| 134 |
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| 135 | public void RestartCore() {
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| 136 | try {
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| 137 | if (pipeFactory.State != CommunicationState.Faulted && pipeFactory.State != CommunicationState.Closed)
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| 138 | pipeProxy.Restart();
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| 139 | }
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| 140 | catch (Exception e) {
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| 141 | OnMessageLogged("Error restarting core: " + e.ToString());
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| 142 | }
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| 143 | }
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| 144 |
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| 145 | public void Sleep() {
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| 146 | try {
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| 147 | if (pipeFactory.State != CommunicationState.Faulted && pipeFactory.State != CommunicationState.Closed) {
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| 148 | pipeProxy.Sleep();
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| 149 | }
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| 150 | }
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| 151 | catch (Exception e) {
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| 152 | OnMessageLogged("Error sending core to sleep: " + e.ToString());
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| 153 | }
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| 154 | }
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| 155 |
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| 156 | public void Close() {
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| 157 | if (pipeFactory.State != CommunicationState.Closed) {
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| 158 | pipeProxy.Unsubscribe();
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| 159 | pipeFactory.Close();
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| 160 | }
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| 161 | }
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| 162 |
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| 163 | public event EventHandler<EventArgs<string>> UserVisibleMessageFired;
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| 164 | public void OnUserVisibleMessageFired(string msg) {
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| 165 | var handler = UserVisibleMessageFired;
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| 166 | if (handler != null) handler(this, new EventArgs<string>(msg));
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| 167 | }
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| 168 |
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| 169 | public event EventHandler<EventArgs<SlaveDisplayStat>> SlaveDisplayStateChanged;
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| 170 | public void OnSlaveDisplayStateChanged(StatusCommons status) {
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| 171 | SlaveDisplayStat stat;
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| 172 |
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| 173 | if (status.Jobs.Count > 0) {
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| 174 | stat = SlaveDisplayStat.Busy;
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| 175 | } else {
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| 176 | stat = SlaveDisplayStat.Idle;
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| 177 | }
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| 178 | if (status.Asleep) {
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| 179 | stat = SlaveDisplayStat.Asleep;
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| 180 | }
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| 181 | if (status.Status == NetworkEnum.WcfConnState.Disconnected || status.Status == NetworkEnum.WcfConnState.Failed) {
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| 182 | stat = SlaveDisplayStat.Offline;
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| 183 | }
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| 184 |
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| 185 | var handler = SlaveDisplayStateChanged;
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| 186 | if (handler != null) handler(this, new EventArgs<SlaveDisplayStat>(stat));
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| 187 | }
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| 188 |
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| 189 | public void OnSlaveDisplayStateChanged(SlaveDisplayStat stat) {
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| 190 | var handler = SlaveDisplayStateChanged;
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| 191 | if (handler != null) handler(this, new EventArgs<SlaveDisplayStat>(stat));
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| 192 | }
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| 193 |
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| 194 | public event EventHandler<EventArgs<StatusCommons>> SlaveStatusChanged;
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| 195 | public void OnStatusChanged(StatusCommons status) {
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| 196 | var handler = SlaveStatusChanged;
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| 197 | if (handler != null) handler(this, new EventArgs<StatusCommons>(status));
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| 198 |
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| 199 | OnSlaveDisplayStateChanged(status);
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| 200 |
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| 201 | int diff = status.JobsFetched - lastJobsFetched;
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| 202 | lastJobsFetched = status.JobsFetched;
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| 203 | if (diff > 0) {
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| 204 | if (diff == 1) {
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| 205 | OnUserVisibleMessageFired("HeuristicLab Hive received 1 new task!");
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| 206 | } else {
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| 207 | OnUserVisibleMessageFired(string.Format("HeuristicLab Hive received {0} new jobs!", diff));
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| 208 | }
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| 209 | }
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| 210 | }
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| 211 |
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| 212 | public event EventHandler<EventArgs<string>> SlaveMessageLogged;
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| 213 | public void OnMessageLogged(string message) {
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| 214 | var handler = SlaveMessageLogged;
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| 215 | if (handler != null) handler(this, new EventArgs<string>(message));
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| 216 | }
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| 217 |
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| 218 | public event EventHandler SlaveShutdown;
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| 219 | public void OnShutdown() {
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| 220 | var handler = SlaveShutdown;
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| 221 | if (handler != null) handler(this, EventArgs.Empty);
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| 222 | OnSlaveDisplayStateChanged(SlaveDisplayStat.NoService);
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| 223 | }
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| 224 |
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| 225 | public event EventHandler<EventArgs<CoreConnection>> CoreConnectionChanged;
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| 226 | public void OnCoreConnectionChanged(CoreConnection conn) {
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| 227 | var handler = CoreConnectionChanged;
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| 228 | if (handler != null) handler(this, new EventArgs<CoreConnection>(conn));
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| 229 | }
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| 230 |
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| 231 | public void Dispose() {
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| 232 | DeregisterEvents();
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| 233 | Close();
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| 234 | }
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| 235 |
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| 236 | public override Common.IDeepCloneable Clone(Common.Cloner cloner) {
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| 237 | throw new NotImplementedException("It's not allowed to clone a SlaveItem!");
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| 238 | }
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| 239 | }
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| 240 | }
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