--- /dev/null
+package org.simantics.databoard.channel;\r
+\r
+import java.io.IOException;\r
+import java.util.concurrent.TimeoutException;\r
+\r
+/**\r
+ * RequestException is thrown to a requester of a service when there was a \r
+ * problem fulfilling the request. Typical error is problem with communication \r
+ * channel or with fulfulling the service. \r
+ *\r
+ * Cause is (typically) one of these:\r
+ * o Communication problems {@link IOException}\r
+ * o Timeout {@link TimeoutException}\r
+ * o Service handler problem {@link ServiceException} \r
+ *\r
+ * @author Toni Kalajainen <toni.kalajainen@iki.fi>\r
+ */\r
+public class RequestException extends Exception {\r
+\r
+ private static final long serialVersionUID = 1L;\r
+\r
+ public RequestException(Throwable cause) {\r
+ super(cause);\r
+ }\r
+\r
+}\r