Add nice error message when renderer is not available

src/com/sheepit/client/Client.java

@@ -34,6 +34,7 @@ import com.sheepit.client.Error.ServerCode;
 import com.sheepit.client.Error.Type;
 import com.sheepit.client.exception.FermeException;
 import com.sheepit.client.exception.FermeExceptionBadResponseFromServer;
+import com.sheepit.client.exception.FermeExceptionNoRendererAvailable;
 import com.sheepit.client.exception.FermeExceptionNoRightToRender;
 import com.sheepit.client.exception.FermeExceptionNoSession;
 import com.sheepit.client.exception.FermeExceptionNoSpaceLeftOnDevice;
@@ -188,6 +189,17 @@ public class Client {
 						}
 					}
 				}
+				catch (FermeExceptionNoRendererAvailable e) {
+					this.gui.error(Error.humanString(Error.Type.RENDERER_NOT_AVAILABLE));
+					// should wait forever to actually display the message to the user
+					while (true) {
+						try {
+							Thread.sleep(100000);
+						}
+						catch (InterruptedException e1) {
+						}
+					}
+				}
 				catch (FermeExceptionNoSession e) {
 					// User has no session need to re-authenticate
 					ret = this.server.getConfiguration();

src/com/sheepit/client/Server.java

@@ -74,6 +74,7 @@ import com.sheepit.client.Configuration.ComputeType;
 import com.sheepit.client.Error.ServerCode;
 import com.sheepit.client.exception.FermeException;
 import com.sheepit.client.exception.FermeExceptionBadResponseFromServer;
+import com.sheepit.client.exception.FermeExceptionNoRendererAvailable;
 import com.sheepit.client.exception.FermeExceptionNoRightToRender;
 import com.sheepit.client.exception.FermeExceptionNoSession;
 import com.sheepit.client.exception.FermeExceptionNoSpaceLeftOnDevice;
@@ -331,6 +332,9 @@ public class Server extends Thread implements HostnameVerifier, X509TrustManager
 					else if (ret == ServerCode.JOB_REQUEST_ERROR_DEAD_SESSION) {
 						throw new FermeExceptionNoSession();
 					}
+					else if (ret == ServerCode.JOB_REQUEST_ERROR_RENDERER_NOT_AVAILABLE) {
+						throw new FermeExceptionNoRendererAvailable();
+					}
 					else if (ret == ServerCode.JOB_REQUEST_ERROR_SESSION_DISABLED) {
 						throw new FermeExceptionSessionDisabled();
 					}

src/com/sheepit/client/exception/FermeExceptionNoRendererAvailable.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 Laurent CLOUET
+ * Author Laurent CLOUET <laurent.clouet@nopnop.net>
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+package com.sheepit.client.exception;
+
+public class FermeExceptionNoRendererAvailable extends FermeException {
+	public FermeExceptionNoRendererAvailable() {
+		super();
+	}
+	
+	public FermeExceptionNoRendererAvailable(String message_) {
+		super(message_);
+	}
+}