added PushStateDispatcher for production and development to WebResourceServlet

scm-webapp/src/main/java/sonia/scm/PushStateDispatcher.java

@@ -0,0 +1,28 @@
+package sonia.scm;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * The PushStateDispatcher is responsible for dispatching the request, to the main entry point of the ui, if no resource
+ * could be found for the requested path. This allows us the implementation of a ui which work with "pushstate" of
+ * html5.
+ *
+ * @since 2.0.0
+ * @see <a href="https://developer.mozilla.org/en-US/docs/Web/API/History_API">HTML5 Push State</a>
+ */
+public interface PushStateDispatcher {
+
+  /**
+   * Dispatches the request to the main entry point of the ui.
+   *
+   * @param request http request
+   * @param response http response
+   * @param uri request uri
+   *
+   * @throws IOException
+   */
+  void dispatch(HttpServletRequest request, HttpServletResponse response, String uri) throws IOException;
+
+}