Cleaner version of removing project's directory

src/com/sheepit/client/Client.java

@@ -27,6 +27,8 @@ import java.io.StringWriter;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Date;
+import java.util.Observable;
+import java.util.Observer;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ThreadLocalRandom;
@@ -565,7 +567,7 @@ public class Client {
 		}
 	}
 	
-	public Error.Type work(Job ajob) {
+	public Error.Type work(final Job ajob) {
 		int ret;
 		
 		gui.setRenderingProjectName(ajob.getName());
@@ -613,8 +615,15 @@ public class Client {
 			this.config.cleanWorkingDirectory();
 			return Error.Type.MISSING_RENDERER;
 		}
-		
-		Error.Type err = ajob.render();
+
+		Observer removeSceneDirectoryOnceRenderHasStartedObserver = new Observer() {
+			@Override public void update(Observable observable, Object o) {
+				System.out.println("Client::work got an event");
+				removeSceneDirectory(ajob);
+			}
+		};
+
+		Error.Type err = ajob.render(removeSceneDirectoryOnceRenderHasStartedObserver);
 		gui.setRenderingProjectName("");
 		gui.setRemainingTime("");
 		gui.setRenderingTime("");

src/com/sheepit/client/Job.java

@@ -35,6 +35,8 @@ import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Observable;
+import java.util.Observer;
 import java.util.TimeZone;
 import java.util.Timer;
 import java.util.TimerTask;
@@ -70,14 +72,10 @@ public class Job {
 	private boolean serverBlockJob;
 	private Gui gui;
 	private Configuration config;
-	private Client client;
 	private Log log;
-
-	private boolean directoryRemoved;
 	
-	public Job(Configuration config_, Client client_, Gui gui_, Log log_, String id_, String frame_, String path_, boolean use_gpu, String command_, String script_, String sceneMd5_, String rendererMd5_, String name_, String password_, String extras_, boolean synchronous_upload_, String update_method_) {
+	public Job(Configuration config_, Gui gui_, Log log_, String id_, String frame_, String path_, boolean use_gpu, String command_, String script_, String sceneMd5_, String rendererMd5_, String name_, String password_, String extras_, boolean synchronous_upload_, String update_method_) {
 		config = config_;
-		client = client_;
 		id = id_;
 		numFrame = frame_;
 		path = path_;
@@ -98,7 +96,6 @@ public class Job {
 		serverBlockJob = false;
 		log = log_;
 		render = new RenderProcess();
-		directoryRemoved = false;
 	}
 	
 	public void block() {
@@ -230,7 +227,7 @@ public class Job {
 		return synchronousUpload;
 	}
 	
-	public Error.Type render() {
+	public Error.Type render(Observer renderStarted) {
 		gui.status("Rendering");
 		RenderProcess process = getProcessRender();
 		Timer timerOfMaxRenderTime = null;
@@ -326,6 +323,7 @@ public class Job {
 		}
 		
 		try {
+			renderStartedObservable event = new renderStartedObservable(renderStarted);
 			String line;
 			log.debug(command.toString());
 			OS os = OS.getOS();
@@ -377,9 +375,8 @@ public class Job {
 						return error;
 					}
 
-					if (directoryRemoved == false && (process.getMemoryUsed() > 0 || process.getRemainingDuration() > 0)) {
-						client.removeSceneDirectory(this);
-						directoryRemoved = true;
+					if (event.isStarted() == false && (process.getMemoryUsed() > 0 || process.getRemainingDuration() > 0)) {
+						event.doNotifyIsStarted();
 					}
 				}
 				input.close();
@@ -859,4 +856,23 @@ public class Job {
 			return config.getTileSize();
 		}
 	}
+
+	public static class renderStartedObservable extends Observable {
+		private boolean isStarted;
+
+		public renderStartedObservable(Observer observer) {
+			super();
+			addObserver(observer);
+		}
+
+		public void doNotifyIsStarted() {
+			setChanged();
+			notifyObservers();
+			isStarted = true;
+		}
+
+		public boolean isStarted() {
+			return isStarted;
+		}
+	}
 }

src/com/sheepit/client/Server.java

@@ -464,7 +464,6 @@ public class Server extends Thread implements HostnameVerifier, X509TrustManager
 				
 				Job a_job = new Job(
 						this.user_config,
-						this.client,
 						this.client.getGui(),
 						this.client.getLog(),
 						job_node.getAttribute("id"),