ADF Performance Tuning part-1 - Production tuning

1. animation-enabled=false in trinidad-config.xml file
2. in web.xml file do the following changes if not done already

   1. oracle.adf.view.rich.automation.ENABLE=false
   2. oracle.adf.view.rich.ASSERT_ENABLED=false
   3. org.apache.myfaces.trinidad.CHECK_FILE_MODIFICATION=false
   4.  org.apache.myfaces.trinidad.COMPRESS_VIEW_STATES=true
   5. org.apache.myfaces.trinidad.DEBUG_JAVASCRIPT=false
   6. org.apache.myfaces.trinidad.DISABLE_CONTENT_COMPRESSION=false
   7. oracle.adf.view.rich.libraryPartitioning.DISABLED=false 
   8. oracle.adf.view.rich.LOGGER_LEVEL=false
   9. javax.faces.STATE_SAVING_METHOD=client 
   10. oracle.adf.view.rich.versionString.HIDDEN=true



3.  Use the ADFLogger
4. Don't use System.out.* or System.err.* - These have major impact on performance
5. Remove commented out code
6. Do not import view or controller classes
7. Close callableStatement, preparedStatements and RowSetIterators
8. Use application module JDBC data source only not  JDBC URLs.
9. Run with Enable Application Module pooling on for production .
10. Define at least one entity object key attribute per entity object.
11.  Ensure entity object UI Hints and messages are internationalized
12. Avoid read only view objects as far as possible
13. Use view criteria over editing view object where clauses
14. Never use view object select *
15. Limit custom code in bean accessors -ie. in getters and setters
16. Use beans only defined in the task flow for reuse 
17. Avoid applicationScope and sessionScope variables
18. Define applicationScope and sessionScope beans in adfc-config.xml
19. Only create backing beans when actually needed, do not bind unnecessary component references into backing beans.
20. Avoid long component ID lengths.
21. Avoid unnecessary use of clientComponent=true
22. Use rendered=false over visible=false wherever possible.
23. Never rely on UI side validation.
24. Avoid inline page/fragment JavaScript and CSS
25. Manual tests for UIs should include stretch / shrink behavior.
26. Manual tests for UIs should include changing font size[Zoom-in and Zoom-out testing]
27. url.rewriting.enabled should be false in weblogic.xml
28. Make sure jbo.debugoutput  is disabled for production
29. Make HA available. Add this entry in adf-config.xml file

  <adf-controller-config xmlns="http://xmlns.oracle.com/adf/controller/config">

    <adf-scope-ha-support>true</adf-scope-ha-support>

  </adf-controller-config>

Useful methods in Oracle ADF part-2

//1. Method to call a flow in taskFlow programatically 

 public static void gotoFlow(String flowName) {
        FacesContext context = FacesContext.getCurrentInstance();
        Application app = context.getApplication();
        NavigationHandler handler = app.getNavigationHandler();
        handler.handleNavigation(context, null, flowName);
    }

//2. Util method to show error and Success Msg

 public static void showMsg(String msgBody, String msgSeverity) {
        FacesMessage fm = new FacesMessage(msgBody);
        if (msgSeverity.equals("info")) {
            fm.setSeverity(FacesMessage.SEVERITY_INFO);
        } else if (msgSeverity.equals("warn")) {
            fm.setSeverity(FacesMessage.SEVERITY_WARN);
        } else if (msgSeverity.equals("error")) {
            fm.setSeverity(FacesMessage.SEVERITY_ERROR);
        } else {
            fm.setSeverity(FacesMessage.SEVERITY_FATAL);
        }
        FacesContext fctx = FacesContext.getCurrentInstance();
        fctx.addMessage(null, fm);
    }

//3. Get Cookie value in ADF

 
        public static String getCookieValue(String cookieName) {
        FacesContext fctx = FacesContext.getCurrentInstance();
        ExternalContext ectx = fctx.getExternalContext();
        Map vRequestCookieMap = ectx.getRequestCookieMap();
        Cookie cookie = (Cookie)vRequestCookieMap.get(cookieName);
        if (cookie != null) {
            return cookie.getValue();
        }
        return null;
    }
   
   

//4. Load a jsp or jspx page (redirect to a page)

 
  public static String loadPage(String pageName) {
        FacesContext vFacesContext = FacesContext.getCurrentInstance();
        ExternalContext vExternalContext = vFacesContext.getExternalContext();
        ControllerContext controllerCtx = null;
        controllerCtx = ControllerContext.getInstance();
        String activityURL = controllerCtx.getGlobalViewActivityURL(pageName);
        try {
            vExternalContext.redirect(activityURL.substring(0,
                                                            activityURL.indexOf("?")));
        } catch (IOException e) {
            e.printStackTrace();

        }
        return null;
    }

//5. Initializing the ADFLogger

private static ADFLogger _logger = 
            ADFLogger.createADFLogger(YourClassName.class); 

//6. Clear the ADF table filter

    public static void removeFilter(RichTable tableBind,String processQueryName) {
        FilterableQueryDescriptor queryDescriptor =
            (FilterableQueryDescriptor)tableBind.getFilterModel();
        if (queryDescriptor != null &&
            queryDescriptor.getFilterCriteria() != null) {
            queryDescriptor.getFilterCriteria().clear();
//processQueryName can found in queryListner of table eg:- #{bindings.Employee1Query.processQuery}
            FacesUtils.invokeMethodExpression(processQueryName,
                                              Object.class, QueryEvent.class,
                                              new QueryEvent(tableBind,
                                                             queryDescriptor));
        }
    }

// 7.Implementing like type filter in ADF table filter

public static void likeFilter(RichTable tableBind,String processQueryName) {
        FilterableQueryDescriptor queryDescriptor =
            (FilterableQueryDescriptor)tableBind.getFilterModel();
        if (queryDescriptor != null &&
            queryDescriptor.getFilterCriteria() != null) {
            Map m=queryDescriptor.getFilterCriteria();
           
            Set keys = m.keySet();
           Map modified=new HashMap();
            for (Iterator i = keys.iterator(); i.hasNext();) {
                  String key = (String) i.next();
                  String value = (String) m.get(key);
                if(value!=null && !value.equals("")){
                    value="%"+value+"%";
                   
                }
                    modified.put(key,value);
                  System.out.println(key + " = " + value);
                }
            queryDescriptor.getFilterCriteria().clear();
            FacesUtils.invokeMethodExpression(processQueryName,
                                              Object.class, QueryEvent.class,
                                              new QueryEvent(tableBind,
                                                             queryDescriptor));
            queryDescriptor.setFilterCriteria(modified);
            FacesUtils.invokeMethodExpression(processQueryName,
                                              Object.class, QueryEvent.class,
                                              new QueryEvent(tableBind,
                                                             queryDescriptor));
        }
    }

// 8. Launching / Invoking a PopUp from Bean. [popupBind is binding of popup inside the bean]

RichPopup.PopupHints hints = new RichPopup.PopupHints();
                    popBind.show(hints);

Merge two Columns into one column while showing data Seperately

Use case scenario:  You may need to show your two column header as well as data into a single ADF Table column. 
Please refer the below image for use case:

ADF has made this use case very simple.

You have just wrap your existing(required) Columns into a single column and its done.

Here is the required code sample:

 <af:column headerText="Emplyee Name"  id="c5" align="center">

          <af:column headerText="First Name" id="c8">

                     <af:outputText value="F_Name #{vs.index+1} " id="ot6"/>

          </af:column>

          <af:column headerText="Last Name" id="c9">

                    <af:outputText value="L_Name #{vs.index+1}" id="ot5"/>

          </af:column>

 </af:column>

Implement selectBooleanRadio in Table Column and show it selected by row selection

Here is use case scenarios:
1. A column with radio button. At a single point of time only one radio button should be shown selected in that column.
2. Selecting the radio button will select that row and vice-versa.

Point no. 1 is achieved by simply drag and drop of selectBooleanRadio component.

 <af:column headerText="Select" id="cs4" rowHeader="true" width="50">       <af:selectBooleanRadio text="" label="Label 1" group="RadioButtons"                                 id="sbr1"/> </af:column>

 Remember to add group="RadioButtons" attribute.

For point no. 2 we have to make a javaScript call.
And here is the required code in jspx or jsff.

  <af:resource type="javascript" source="/js/custom.js"/>

And in custom.js add these Lines.

function rowSelectionListener(evt) {
    var table = evt.getSource();
    var selectedRowKey;
    for (key in table.getSelectedRowKeys()) {
        table.findComponent('sbr1', key).setValue(false);
        selectedRowKey = key;
        break;
    }
    table.findComponent('sbr1', selectedRowKey).setValue(true);
} 

Special thanks for point 2 goes to ADF Goodies.
Here is the Link

Insert new row at the end of an ADF Table

In some of case you may want to insert a new row at the end of the table then this method will come handy.

 public String CreateInsert() { 

DCBindingContainer bindings = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();

        DCIteratorBinding dcIterBind =
            (DCIteratorBinding)bindings.get("EmployeeView1Iterator");
        Row newRow = dcIterBind.getViewObject().createRow();
        newRow.setNewRowState(Row.STATUS_INITIALIZED);
        ViewObject vo = dcIterBind.getViewObject();
        vo.last();
        // to insert row at the end of the table
        vo.next();
        vo.insertRow(newRow);
        return null; 

}

Useful shortcut keys for Jdeveloper and Oracle ADF

Here are few Jdeveloper shortcuts that can come handy while development [ mostly for Jdev 12c }

1. Surround with popUp :  ALT+Shift+Z
2. System.out.println(); : sop+Ctrl+Enter

JSF Lifecycle in short

1. JSF Restore View: First phase receives the page request from JSF servlet and attempts to find and restore server side components state (A set of server side memory objects that builds the server side hierarchical page structure.). If view can't found as identified by requested view id , a new view is created on the server and the current page's view is stored in FacesContext static object.
2. Apply request values: The requested values are read and converted to the data type requested by underlying model attributes. The values are accessed from UI components submitted values and passed to local value. When an input component's immediate attribute is set to true, its component validation is performed and component's listeners are executed within this phase. This is one of two phases in which page navigation can occur.
3. Process Validation: Components are validated for missing data. At the end of this phase value change events are fired.
4. Update Model Values: Model is updated with the validated value of UI components local values. Then local values of UI components are discarded.
5. Invoke Application: During this phase , all application level events such as Form Submits are executed. This phase also executes a view layer logic that is stored in action listeners. Page navigation can occur in this phase.
6. Render Response: Prepares the page view for display on client (Browser). If page view is called for first time, then restore view phase directly passed control to this phase.