Use SharedVariables to persist the topic.

Author: m0ver

src/main/java/custom/application/v1/smalltalk.java

@@ -8,6 +8,7 @@
 import org.tinystruct.ApplicationException;
 import org.tinystruct.ApplicationRuntimeException;
 import org.tinystruct.application.Context;
+import org.tinystruct.application.SharedVariables;
 import org.tinystruct.data.FileEntity;
 import org.tinystruct.data.component.Builder;
 import org.tinystruct.data.component.Builders;
@@ -110,7 +111,7 @@ public smalltalk index() {
         this.setVariable("session_id", request.getSession().getId());
 
         Variable<?> topic;
-        if ((topic = this.getVariable("meeting_code")) != null) {
+        if ((topic = SharedVariables.getInstance().getVariable(meetingCode.toString())) != null) {
             this.setVariable("topic", topic.getValue().toString().replaceAll("[\r\n]", "<br />"), true);
         } else {
             this.setVariable("topic", "");