10g: BI Beans Graph sometimes not shown

Question

Hi,
I have an ADF 10g BC jsf application which includes a graph (BI Beans Graph version [3.2.2.0.24]). Next to the graph is a selectable legend. The use case is as follows:
The graph shows the forecast algorithms for the selected material.
By default, the AlgorithmUser and AlgorithmSystem should be selected. There has to be a legend containing a selection box for every algorithm that should be selectable on the graph. By default algorithms SFA and AF should be selected
All shoud work synchroneously:
-     When next, previous or a material from the listbox is selected, than the graph and legend should be updated with new algorithmUser and algorithmSystem
-     When an other algorithmUser is selected, this should be directly visible on the graph and legend
-     When checkboxes on the graph are clicked, the graph should update and show the corresponding algorithms.
This is implemented as follows:
1.     The first thing needed is something to keep track of the selected algorithms. For this, we create a new Set in the application module together with the get accessor.
private Set<String> currentGraphData = new HashSet<String>();
public Set<String> getCurrentGraphData() {
return currentGraphData;
Expose the accessor in the application module.
2.     Now, this set should be filled with AF, SFA, algorithmSystem and algorithmUser when we move to the next, previous, first, last record, or by selecting a record by its index. To add this behaviour, open the VAdfLtf3SyfMaterialsViewImpl.java.
Add helper method:
private void updateAlgorithmList(Row row) {
if (row != null) {
String algoUser = (String)row.getAttribute("AlgorithmUser");
String algoSystem = (String)row.getAttribute("AlgorithmSystem");
FCSyfReviewModule mod = (FCSyfReviewModule)this.getApplicationModule();
Set data = mod.getCurrentGraphData();
data.clear();
data.add("SFA");
data.add("AF");
data.add(algoUser);
data.add(algoSystem);
This will insert the four default algorithms into the set when there is a current row (if the dataset is empty, there is no need to add the default algorithms)
Call the helper method for next, previous, … as mentioned above:
public boolean setCurrentRowAtRangeIndex(int i) {
boolean result = super.setCurrentRowAtRangeIndex(i);
updateAlgorithmList(getCurrentRow());
return result;
public boolean setCurrentRow(Row row) {
updateAlgorithmList(row);
return super.setCurrentRow(row);
public Row next() {
Row row = super.next();
updateAlgorithmList(row);
return row;
public Row first() {
Row row = super.first();
updateAlgorithmList(row);
return row;
public Row last() {
Row row = super.last();
updateAlgorithmList(row);
return row;
public Row previous() {
Row row = super.previous();
updateAlgorithmList(row);
return row;
So, if we now select an other record in any thinkable way, the Set will contain the correct four default algorithms.
3.     Now, we need only the graph data for the algorithms set in the Set. For this, open the Ltf3AdfSyfGraphDataRowImp.java
Add the following helper method
private boolean showData(String algorithm){
FCSyfReviewModule am = (FCSyfReviewModule)this.getApplicationModule();
Set set = am.getCurrentGraphData();
return set.contains(algorithm);
This method will take an algorithm code as input(MA3, MA6, EXP, PZD3, …) and returns true if it is in the Set.
Now, update the getMethods of all algorithms to use this helper method:
public Number getVolMa3() {
return showData("MA3")?(Number) getAttributeInternal(VOLMA3):null;
4.     Finally, the clickable legend has to be defined.
For this, create a new view object: Ltf3AdfSyfGraphLegend. Select ‘Rows Populated Progra;;atically, not Based on a Query’ Create a transient updatable attribute for every legend that can be selected. The transient attribute should be of type Boolean.
For query statement, enter “Select 1 from dual” a query has to be defined to make sure that the getters/setters are called on the userinterface page.
Create two new helper methods:
public Boolean getLegend(String algorithm) {
FCSyfReviewModule am = (FCSyfReviewModule)this.getApplicationModule();
Set set = am.getCurrentGraphData();
return set.contains(algorithm);
public void updateLegend(int AttributeId, Boolean value, String algorithm){
FCSyfReviewModule am = (FCSyfReviewModule)this.getApplicationModule();
Set set = am.getCurrentGraphData();
if (value.booleanValue())
set.add(algorithm);
else
set.remove(algorithm);
The first one will return true when the parameter algorithm is available in the Set. The getter methods will use this method.
The second one will update the Set object. If the value is true, than this means that it was false before, so the algorithm needs to be added to the set. If the value is false, than it was true before, and the algorithm needs to be removed from the set.
Now, getters and setters can be implemented as shown below.
public Boolean getMA3() {
return getLegend("MA3");
public void setMA3(Boolean value) {
updateLegend(value, "MA3");
and so on..
5.     Now, all logic is implemented. The only thing to do is to drag drop the components on the screen and update partial triggers:
a.     Drop materials as form
i.     bind algorithmUser to LOV and give it id algoUserList
b.     Create detail graph (see tutorial on graphs)
c.     Create previous and next button.
d.     Drop GraphLegend as ADF form
i.     By default all attributes are created as inputText, convert them all to SelectBooleanCheckbox, give every checkbox an id (use name of the algorithm for simplicity)
e.     Drop materials as navigation list, give it ID matList
f.     Set partial triggers
i.     On panelGroup surrounding the graph, add partial triggers from legend id’s, matList and algoUserList and prev/next button
ii.     On panelGroup surrounding the legend, add triggers: matList and algoUserList and prev/next button
Now, here is my problem: When this application is deployed on a server, this works fine most of the time. But sometimes when I click a legend the graph image just disappears. But when I reclick twice the graph is correctly shown. Can someone tell what the cause of this problem could be (rendering delay???).

Answer 1

dont worry too much about
oracle.dss.graph.GraphModelAdapter::setSupportedDataLayerFlags (): Current DataSource does not support requested type: MetadataMap.METADATA_VIEWSTYLE
its not a real error message more a warning one
have you looked at addiotional trace files and have other trace/warning/error messages ?
is your server running under unix and if so, is your display variable set ?
regards,
thomas