Running ADF in High availability

Some of the things you should consider when developing ADF application running in HA environment is changes to pageFlowScope or ViewScope during a request. Making ADF aware of the changes you made to a ViewScope or pageFlowScope params is essential to replicate the changes across cluster.


To accomplish this:
1- Set the adf-scope-ha-support parameter inside adf-config.xml config file to true, this will make sure that changes will automatically replicated within a cluster.
 < adf-controller-config xmlns="http://xmlns.oracle.com/adf/controller/config">
 < adf-scope-ha-support>true</adf-scope-ha-support> </adf-controller-config>

2-  marking the scope is Dirty by adding additional code after scope changes:
    ControllerContext ctx = ControllerContext.getInstance();
    ctx.markScopeDirty(AdfFacesContext.getCurrentInstance().getViewScope());

note if you are making a change by reference without putting (replacing) param value in the Map you must call markScopeDirty.

Example:

Map<String, Object> viewScope = AdfFacesContext.getCurrentInstance().getViewScope();

MyObject obj = (MyObject)viewScope.get("myObjectName");

Obj.setFoo("newValue");

Putting value again in the map will replicate the change across cluster without calling markScopeDirty method.
viewScope.put("myObjectName");

http://docs.oracle.com/cd/E12839_01/core.1111/e10106/adf.htm