Can I have a Thread running inside another Thread.

I am in the process of trying to (somehow) develop a simple pluginable application. At least for now just to start understanding the concept of such applications (like eclipse).
I tought of loading each plugin inside a thread as a seperate process. So that all the plugins can run concurently. However what if one of the plugins make use of threads? Is that possible? however most important then that, do you think it makes sense?
I must admit I still did not even try an example of this, since I am still coding the refectoring section, and most of the time I have spent it on ant build (I know just acuses ... but :$)
regards,
sim085

Why would every plugin run in it's own thread? Consider the example of Eclipse. I've got an XML editor plugin installed. Now when I only edit Java files, would the code of that xml editor run in it's own Thread and waste resources? No, it would not run at all. In eclipse there is a central resource that knows "when the user wants to open an XML file then let the xml editor plugin handle that" and only when I click on an XML file the code from that plugin is actually run.
Basically you'll have to think about what your plugins should be able to do. Do you simply want to provide additional actions for your menus? Or do you want it to open a seperate window?
Btw, did you consider using Eclipse as a base? It's got the entire plugin concept worked out already and is a rather stable and powerful target platform IMHO.

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http://forums.adobe.com/message/4572897#4572897
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Message was edited by: Laubender

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Regards,
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I think I'm messing up everything and i'm confused with how jsf works.
I've noticed now that my problem doen't have todo with if i'm usin one form or nested forms :(
The problem is (as i understood) that if the backing bean that I'm using for the chart part is a request chart, every time i submit the form a new instance of the bean is created and so the initialization of the selected checkboxes is redone.
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</h:panelGrid>
<h:panelGrid id="calcByDay_grid" columns="2"
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               type="Line" plotColor="#D8D8D8" binding="#{lineChartBean.lineChart}" />
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     <h:panelGroup>
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          <h:commandButton id="lineSubmit" value="Submit"
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</h:panelGrid>
... (other charts) ...
</h:form>
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public class LineChartBean {
     private Logger logger = Logger.getLogger(LineChartBean.class
               .getSimpleName());
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               "13/08/05", "14/08/05", "15/08/05", "16/08/05", "17/08/05",
               "18/08/05", "19/08/05", "20/08/05", "21/08/05", "22/08/05",
               "23/08/05", "24/08/05", "25/08/05", "26/08/05" };
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               new SelectItem("P1(Open)", "P1(Open)"),
               new SelectItem("P2(Open)", "P2(Open)"),
               new SelectItem("Active", "Active"), new SelectItem("Test", "Test"),
               new SelectItem("Evol", "Evol") };
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               { 11, 1, 4, 7, 5, 11.67741935 }, { 11, 1, 4, 7, 5, 11.7016129 },
               { 13, 2, 5, 7, 5, 11.72580645 }, { 14, 2, 5, 7, 5, 11.75 },
               { 12, 3, 4, 9, 5, 11.77419355 }, { 12, 3, 4, 9, 5, 11.7983871 },
               { 12, 3, 4, 9, 5, 11.82258065 }, { 12, 3, 4, 9, 5, 11.84677419 },
               { 12, 3, 4, 9, 5, 11.87096774 }, { 14, 3, 5, 10, 4, 11.89516129 },
               { 13, 2, 6, 12, 4, 11.91935484 }, { 13, 2, 6, 12, 4, 11.94354839 },
               { 13, 2, 6, 12, 4, 11.96774194 }, { 12, 2, 5, 4, 13, 11.99193548 },
               { 12, 2, 5, 4, 13, 12.01612903 }, { 12, 2, 5, 4, 13, 12.04032258 },
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               { 11, 0, 5, 3, 5, 12.16129032 }, { 11, 0, 5, 3, 5, 12.18548387 },
               { 11, 0, 5, 3, 5, 12.20967742 }, { 12, 0, 6, 2, 5, 12.23387097 },
               { 12, 0, 6, 2, 4, 12.25806452 }, { 12, 0, 6, 2, 4, 12.28225806 },
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     private DefaultCategoryDataset lineDataset;
     private String[] lineSelectedSeries;
     private NumberFormat formatter = new DecimalFormat("#,###.##");
     public CategoryDataset getLineDataset() {
          if(firstTime) {
               lineSelectedSeries = new String[lineSeries.length];
               for (int i = 0; i < lineSeries.length; i++) {
                    lineSelectedSeries[i] = (String) lineSeries.getValue();
               firstTime = false;
          lineDataset = new DefaultCategoryDataset();
          for (int serie = 0; serie < lineSeries.length; serie++) {
               String serieName = (String) lineSeries[serie].getValue();
               boolean isSelected = false;
               for (String selectedSerie : lineSelectedSeries) {
                    if (lineSeries[serie].getValue().equals(selectedSerie)) {
                         isSelected = true;
                         break;
               if (!isSelected) {
                    continue;
               } else {
                    for (int category = 0; category < lineCategories.length; category++) {
                         double y = lineValues[category][serie];
                         lineDataset
                                   .addValue(y, serieName, lineCategories[category]);
          return lineDataset;
     public NumberFormat getFormatter() {
          return formatter;
     * @return Returns the lineSelectedSeries.
     public String[] getLineSelectedSeries() {
          return lineSelectedSeries;
     * @return Returns the lineSeries.
     public SelectItem[] getLineSeries() {
          return lineSeries;
     * @param lineSelectedSeries
     * The lineSelectedSeries to set.
     public void setLineSelectedSeries(String[] lineSelectedSeries) {
          this.lineSelectedSeries = lineSelectedSeries;

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