1 | #region License Information
|
---|
2 | /* HeuristicLab
|
---|
3 | * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
|
---|
4 | *
|
---|
5 | * This file is part of HeuristicLab.
|
---|
6 | *
|
---|
7 | * HeuristicLab is free software: you can redistribute it and/or modify
|
---|
8 | * it under the terms of the GNU General Public License as published by
|
---|
9 | * the Free Software Foundation, either version 3 of the License, or
|
---|
10 | * (at your option) any later version.
|
---|
11 | *
|
---|
12 | * HeuristicLab is distributed in the hope that it will be useful,
|
---|
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
15 | * GNU General Public License for more details.
|
---|
16 | *
|
---|
17 | * You should have received a copy of the GNU General Public License
|
---|
18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
|
---|
19 | */
|
---|
20 | #endregion
|
---|
21 |
|
---|
22 | using System;
|
---|
23 | using System.Collections.Generic;
|
---|
24 | using System.IO;
|
---|
25 | using System.Threading;
|
---|
26 | using HeuristicLab.Common;
|
---|
27 | using HeuristicLab.Core;
|
---|
28 | using HeuristicLab.Services.Hive.Common.DataTransfer;
|
---|
29 | using HeuristicLab.Services.Hive.Common;
|
---|
30 | using HeuristicLab.Clients.Hive.Slave;
|
---|
31 |
|
---|
32 |
|
---|
33 | namespace HeuristicLab.Clients.Hive.Salve {
|
---|
34 | /// <summary>
|
---|
35 | /// The core component of the Hive Client
|
---|
36 | /// </summary>
|
---|
37 | public class Core : MarshalByRefObject {
|
---|
38 | public static bool abortRequested { get; set; }
|
---|
39 |
|
---|
40 | public static ILog Log { get; set; }
|
---|
41 |
|
---|
42 | private Dictionary<Guid, Executor> engines = new Dictionary<Guid, Executor>();
|
---|
43 | private Dictionary<Guid, AppDomain> appDomains = new Dictionary<Guid, AppDomain>();
|
---|
44 | private Dictionary<Guid, Job> jobs = new Dictionary<Guid, Job>();
|
---|
45 |
|
---|
46 | private WcfService wcfService;
|
---|
47 | private HeartbeatManager heartbeatManager;
|
---|
48 |
|
---|
49 | private bool currentlyFetching;
|
---|
50 | private bool CurrentlyFetching {
|
---|
51 | get {
|
---|
52 | return currentlyFetching;
|
---|
53 | }
|
---|
54 | set {
|
---|
55 | currentlyFetching = value;
|
---|
56 | Logger.Debug("Set CurrentlyFetching to " + currentlyFetching);
|
---|
57 | }
|
---|
58 | }
|
---|
59 |
|
---|
60 | public Dictionary<Guid, Executor> ExecutionEngines {
|
---|
61 | get { return engines; }
|
---|
62 | }
|
---|
63 |
|
---|
64 | internal Dictionary<Guid, Job> Jobs {
|
---|
65 | get { return jobs; }
|
---|
66 | }
|
---|
67 |
|
---|
68 | /// <summary>
|
---|
69 | /// Main Method for the client
|
---|
70 | /// </summary>
|
---|
71 | public void Start() {
|
---|
72 | abortRequested = false;
|
---|
73 | Logger.Info("Hive Slave started");
|
---|
74 | //TODO: implement slave console server
|
---|
75 | //SlaveConsoleServer server = new SlaveConsoleServer();
|
---|
76 | //server.Start();
|
---|
77 |
|
---|
78 | ConfigManager manager = ConfigManager.Instance;
|
---|
79 | manager.Core = this;
|
---|
80 |
|
---|
81 | wcfService = WcfService.Instance;
|
---|
82 | RegisterServiceEvents();
|
---|
83 |
|
---|
84 | StartHeartbeats(); // Start heartbeats thread
|
---|
85 | DispatchMessageQueue(); // dispatch messages until abortRequested
|
---|
86 |
|
---|
87 | DeRegisterServiceEvents();
|
---|
88 |
|
---|
89 | //server.Close();
|
---|
90 | Logger.Info("Program shutdown");
|
---|
91 | }
|
---|
92 |
|
---|
93 | private void StartHeartbeats() {
|
---|
94 | //Initialize the heartbeat
|
---|
95 | heartbeatManager = new HeartbeatManager { Interval = new TimeSpan(0, 0, 10) };
|
---|
96 | heartbeatManager.StartHeartbeat();
|
---|
97 | }
|
---|
98 |
|
---|
99 | private void DispatchMessageQueue() {
|
---|
100 | MessageQueue queue = MessageQueue.GetInstance();
|
---|
101 | while (!abortRequested) {
|
---|
102 | MessageContainer container = queue.GetMessage();
|
---|
103 | DetermineAction(container);
|
---|
104 | }
|
---|
105 | }
|
---|
106 |
|
---|
107 | private void RegisterServiceEvents() {
|
---|
108 | //TODO
|
---|
109 | }
|
---|
110 |
|
---|
111 | private void DeRegisterServiceEvents() {
|
---|
112 | //TODO
|
---|
113 | }
|
---|
114 |
|
---|
115 | /// <summary>
|
---|
116 | /// Reads and analyzes the Messages from the MessageQueue and starts corresponding actions
|
---|
117 | /// </summary>
|
---|
118 | /// <param name="container">The Container, containing the message</param>
|
---|
119 | private void DetermineAction(MessageContainer container) {
|
---|
120 | Logger.Info("Message: " + container.Message.ToString() + " for job: " + container.JobId);
|
---|
121 | switch (container.Message) {
|
---|
122 | //Server requests to abort a job
|
---|
123 | case MessageContainer.MessageType.AbortJob:
|
---|
124 | if (engines.ContainsKey(container.JobId))
|
---|
125 | try {
|
---|
126 | engines[container.JobId].Abort();
|
---|
127 | }
|
---|
128 | catch (AppDomainUnloadedException) {
|
---|
129 | // appdomain already unloaded. Finishing job probably ongoing
|
---|
130 | }
|
---|
131 | else
|
---|
132 | Logger.Error("AbortJob: Engine doesn't exist");
|
---|
133 | break;
|
---|
134 |
|
---|
135 | //Pull a Job from the Server
|
---|
136 | case MessageContainer.MessageType.AquireJob:
|
---|
137 | if (!CurrentlyFetching) {
|
---|
138 | //TODO: handle in own thread!!
|
---|
139 | Job myJob = wcfService.AquireJob();
|
---|
140 | JobData jobData = wcfService.GetJobData(myJob.Id);
|
---|
141 | wcfService_GetJobCompleted(myJob, jobData);
|
---|
142 | CurrentlyFetching = true;
|
---|
143 | } else
|
---|
144 | Logger.Info("Currently fetching, won't fetch this time!");
|
---|
145 | break;
|
---|
146 |
|
---|
147 | //A Job has finished and can be sent back to the server
|
---|
148 | case MessageContainer.MessageType.JobStopped:
|
---|
149 | SendFinishedJob(container.JobId);
|
---|
150 | break;
|
---|
151 |
|
---|
152 | case MessageContainer.MessageType.JobFailed:
|
---|
153 | SendFinishedJob(container.JobId);
|
---|
154 | break;
|
---|
155 |
|
---|
156 | //Hard shutdown of the client
|
---|
157 | case MessageContainer.MessageType.ShutdownSlave:
|
---|
158 | ShutdownCore();
|
---|
159 | break;
|
---|
160 | }
|
---|
161 | }
|
---|
162 |
|
---|
163 | public void ShutdownCore() {
|
---|
164 | Logger.Info("Shutdown Signal received");
|
---|
165 |
|
---|
166 | Logger.Debug("Stopping heartbeat");
|
---|
167 | heartbeatManager.StopHeartBeat();
|
---|
168 | abortRequested = true;
|
---|
169 | Logger.Debug("Logging out");
|
---|
170 |
|
---|
171 | lock (engines) {
|
---|
172 | Logger.Debug("engines locked");
|
---|
173 | foreach (KeyValuePair<Guid, AppDomain> kvp in appDomains) {
|
---|
174 | Logger.Debug("Shutting down Appdomain for " + kvp.Key);
|
---|
175 | appDomains[kvp.Key].UnhandledException -= new UnhandledExceptionEventHandler(appDomain_UnhandledException);
|
---|
176 | AppDomain.Unload(kvp.Value);
|
---|
177 | }
|
---|
178 | }
|
---|
179 |
|
---|
180 | WcfService.Instance.Disconnect();
|
---|
181 | }
|
---|
182 |
|
---|
183 | //TODO: make synchronized
|
---|
184 | //TODO: start own thread?
|
---|
185 | //only called when waiting for child jobs?
|
---|
186 | public void PauseJob(JobData data ) {
|
---|
187 | if(!Jobs.ContainsKey(data.JobId)) {
|
---|
188 | //TODO: error handling
|
---|
189 | }
|
---|
190 | Job job = Jobs[data.JobId];
|
---|
191 | job.JobState = JobState.WaitingForChildJobs;
|
---|
192 |
|
---|
193 | wcfService.UpdateJob(job, data);
|
---|
194 | KillAppDomain(data.JobId);
|
---|
195 | }
|
---|
196 |
|
---|
197 |
|
---|
198 | /// <summary>
|
---|
199 | /// serializes the finished job and submits it to the server. If, at the time, a network connection is unavailable, the Job gets stored on the disk.
|
---|
200 | /// once the connection gets reestablished, the job gets submitted
|
---|
201 | /// </summary>
|
---|
202 | /// <param name="jobId"></param>
|
---|
203 | public void SendFinishedJob(object jobId) {
|
---|
204 | try {
|
---|
205 | Guid jId = (Guid)jobId;
|
---|
206 | Logger.Info("Getting the finished job with id: " + jId);
|
---|
207 | if (!engines.ContainsKey(jId)) {
|
---|
208 | Logger.Info("Engine doesn't exist");
|
---|
209 | return;
|
---|
210 | }
|
---|
211 | if (!jobs.ContainsKey(jId)) {
|
---|
212 | Logger.Info("Job doesn't exist");
|
---|
213 | return;
|
---|
214 | }
|
---|
215 | Job cJob = jobs[jId];
|
---|
216 |
|
---|
217 | JobData sJob = engines[jId].GetFinishedJob();
|
---|
218 | cJob.Exception = engines[jId].CurrentException;
|
---|
219 | cJob.ExecutionTime = engines[jId].ExecutionTime;
|
---|
220 |
|
---|
221 | try {
|
---|
222 | Logger.Info("Sending the finished job with id: " + jId);
|
---|
223 | wcfService.UpdateJob(cJob, sJob);
|
---|
224 | SlaveStatusInfo.JobsProcessed++;
|
---|
225 | }
|
---|
226 | catch (Exception e) {
|
---|
227 | Logger.Info("Transmitting to server failed. Storing the finished job with id: " + jId + " to hdd (" + e.ToString() + ")");
|
---|
228 | }
|
---|
229 | finally {
|
---|
230 | KillAppDomain(jId); // kill app-domain in every case
|
---|
231 | heartbeatManager.AwakeHeartBeatThread();
|
---|
232 | }
|
---|
233 | }
|
---|
234 | catch (Exception e) {
|
---|
235 | OnExceptionOccured(e);
|
---|
236 | }
|
---|
237 | }
|
---|
238 |
|
---|
239 | /// <summary>
|
---|
240 | /// A new Job from the wcfService has been received and will be started within a AppDomain.
|
---|
241 | /// </summary>
|
---|
242 | /// <param name="sender"></param>
|
---|
243 | /// <param name="e"></param>
|
---|
244 | void wcfService_GetJobCompleted(Job myJob, JobData jobData) {
|
---|
245 | Logger.Info("Received new job with id " + myJob.Id);
|
---|
246 | String pluginDir = Path.Combine(PluginCache.Instance.PluginTempBaseDir, myJob.Id.ToString());
|
---|
247 | bool pluginsPrepared = false;
|
---|
248 |
|
---|
249 | try {
|
---|
250 | PluginCache.Instance.PreparePlugins(myJob, jobData);
|
---|
251 | Logger.Debug("Plugins fetched for job " + myJob.Id);
|
---|
252 | pluginsPrepared = true;
|
---|
253 | }
|
---|
254 | catch (Exception exception) {
|
---|
255 | Logger.Error(string.Format("Copying plugins for job {0} failed: {1}", myJob.Id, exception));
|
---|
256 | }
|
---|
257 |
|
---|
258 | if (pluginsPrepared) {
|
---|
259 | try {
|
---|
260 | AppDomain appDomain = HeuristicLab.PluginInfrastructure.Sandboxing.SandboxManager.CreateAndInitSandbox(myJob.Id.ToString(), pluginDir, Path.Combine(pluginDir, PluginCache.ConfigFileName));
|
---|
261 | appDomain.UnhandledException += new UnhandledExceptionEventHandler(appDomain_UnhandledException);
|
---|
262 | lock (engines) {
|
---|
263 | if (!jobs.ContainsKey(myJob.Id)) {
|
---|
264 | jobs.Add(myJob.Id, myJob);
|
---|
265 | appDomains.Add(myJob.Id, appDomain);
|
---|
266 | Logger.Debug("Creating AppDomain");
|
---|
267 | Executor engine = (Executor)appDomain.CreateInstanceAndUnwrap(typeof(Executor).Assembly.GetName().Name, typeof(Executor).FullName);
|
---|
268 | Logger.Debug("Created AppDomain");
|
---|
269 | engine.JobId = myJob.Id;
|
---|
270 | engine.core = this;
|
---|
271 | Logger.Debug("Starting Engine for job " + myJob.Id);
|
---|
272 | engines.Add(myJob.Id, engine);
|
---|
273 | engine.Start(jobData.Data);
|
---|
274 | SlaveStatusInfo.JobsFetched++;
|
---|
275 | Logger.Info("Increment FetchedJobs to:" + SlaveStatusInfo.JobsFetched);
|
---|
276 | }
|
---|
277 | }
|
---|
278 | heartbeatManager.AwakeHeartBeatThread();
|
---|
279 | }
|
---|
280 | catch (Exception exception) {
|
---|
281 | Logger.Error("Creating the Appdomain and loading the job failed for job " + myJob.Id);
|
---|
282 | Logger.Error("Error thrown is: ", exception);
|
---|
283 | CurrentlyFetching = false;
|
---|
284 | KillAppDomain(myJob.Id);
|
---|
285 | }
|
---|
286 | }
|
---|
287 | CurrentlyFetching = false;
|
---|
288 | }
|
---|
289 |
|
---|
290 | public event EventHandler<EventArgs<Exception>> ExceptionOccured;
|
---|
291 | private void OnExceptionOccured(Exception e) {
|
---|
292 | Logger.Error("Error: " + e.ToString());
|
---|
293 | var handler = ExceptionOccured;
|
---|
294 | if (handler != null) handler(this, new EventArgs<Exception>(e));
|
---|
295 | }
|
---|
296 |
|
---|
297 | void appDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) {
|
---|
298 | Logger.Error("Exception in AppDomain: " + e.ExceptionObject.ToString());
|
---|
299 | KillAppDomain(new Guid(e.ExceptionObject.ToString()));
|
---|
300 | }
|
---|
301 |
|
---|
302 | /// <summary>
|
---|
303 | /// Kill a appdomain with a specific id.
|
---|
304 | /// </summary>
|
---|
305 | /// <param name="id">the GUID of the job</param>
|
---|
306 | public void KillAppDomain(Guid id) {
|
---|
307 | Logger.Debug("Shutting down Appdomain for Job " + id);
|
---|
308 | lock (engines) {
|
---|
309 | try {
|
---|
310 | if (engines.ContainsKey(id))
|
---|
311 | engines[id].Dispose();
|
---|
312 | if (appDomains.ContainsKey(id)) {
|
---|
313 | appDomains[id].UnhandledException -= new UnhandledExceptionEventHandler(appDomain_UnhandledException);
|
---|
314 |
|
---|
315 | int repeat = 5;
|
---|
316 | while (repeat > 0) {
|
---|
317 | try {
|
---|
318 | AppDomain.Unload(appDomains[id]);
|
---|
319 | repeat = 0;
|
---|
320 | }
|
---|
321 | catch (CannotUnloadAppDomainException) {
|
---|
322 | Logger.Error("Could not unload AppDomain, will try again in 1 sec.");
|
---|
323 | Thread.Sleep(1000);
|
---|
324 | repeat--;
|
---|
325 | if (repeat == 0) {
|
---|
326 | throw; // rethrow and let app crash
|
---|
327 | }
|
---|
328 | }
|
---|
329 | }
|
---|
330 | appDomains.Remove(id);
|
---|
331 | }
|
---|
332 |
|
---|
333 | engines.Remove(id);
|
---|
334 | jobs.Remove(id);
|
---|
335 | PluginCache.Instance.DeletePluginsForJob(id);
|
---|
336 | GC.Collect();
|
---|
337 | }
|
---|
338 | catch (Exception ex) {
|
---|
339 | Logger.Error("Exception when unloading the appdomain: ", ex);
|
---|
340 | }
|
---|
341 | }
|
---|
342 | GC.Collect();
|
---|
343 | }
|
---|
344 | }
|
---|
345 |
|
---|
346 |
|
---|
347 | }
|
---|