#550 added in playground examples of splitters

gateleen-playground/src/main/resources/playground/server/admin/v1/queueSplitters

@@ -1,18 +1,23 @@
 {
-    "my-queue-1" : {
+    "queue-static-split": {
         "postfixFromStatic": [
             "A",
             "B",
             "C",
             "D"
         ]
     },
-    "my-queue-[0-9]+" : {
+    "queue-header-[a-z]+": {
         "postfixDelimiter": "+",
-        "postfixFromHeader": "{x-rp-deviceid}"
+        "postfixFromHeader": "x-rp-deviceid"
     },
-    "my-queue-[a-zA-Z]+" : {
+    "queue-path-[a-z]+": {
         "postfixDelimiter": "_",
-        "postfixFromUrl": ".*/path1/(.*)/path3/path4/.*"
+        "postfixFromUrl": ".*/path1/(.*)/.*"
+    },
+    "queue-header-and-path-[a-z]+": {
+        "postfixDelimiter": "_",
+        "postfixFromHeader": "x-rp-deviceid",
+        "postfixFromUrl": ".*/path1/(.*)/.*"
     }
 }

gateleen-queue/src/main/java/org/swisspush/gateleen/queue/queuing/splitter/executors/QueueSplitExecutorFromRequest.java

@@ -25,8 +25,11 @@ public String executeSplit(String queue, HttpServerRequest request) {
                 }
             }
             if (configuration.getPostfixFromHeader() != null) {
-                stringBuilder.append(configuration.getPostfixDelimiter());
-                stringBuilder.append(request.headers().get(configuration.getPostfixFromHeader()));
+                String headerValue = request.headers().get(configuration.getPostfixFromHeader());
+                if (headerValue != null) {
+                    stringBuilder.append(configuration.getPostfixDelimiter());
+                    stringBuilder.append(headerValue);
+                }
             }
         }
         return stringBuilder.toString();

gateleen-queue/src/test/java/org/swisspush/gateleen/queue/queuing/splitter/executors/QueueSplitExecutorFromRequestTest.java

@@ -82,7 +82,7 @@ public void testExecuteSplitWithHeaderButMissingInRequest() {
         when(request.headers()).thenReturn(new HeadersMultiMap());
 
         // Then
-        assertEquals("queue-1-null", executor.executeSplit("queue-1", request));
+        assertEquals("queue-1", executor.executeSplit("queue-1", request));
     }
 
     @Test