Examples of ViewPool

com.couchbase.client.http.ViewPool

Extended Pool that allows for explicit removal of {@link HttpHost}s.

org.apache.myfaces.view.facelets.pool.ViewPool

This class defines the necessary operations that a view pool should comply in order to be used by MyFaces.

A View Pool is a set of initialized views that are kept ready to use. The idea is reset and reuse views taking advantage of existing JSF 2.0 Partial State Saving algorithm with some small additions to component's saveState() method.

This technique works by these reasons:

A view is composed by many small objects that are created multiple times per each request, and the time spent creating these objects is usually larger than the time used to traverse the component tree.
The structure of a view usually does not change over application lifetime.
The "delta state" or in other words the elements that change in view are small compared with the elements that does not change.

The implementation proposed uses a lock free view pool structure with soft or weak references. The lock free view pool ensures fast access and the soft or weak references ensured the garbage collection algorithm is not affected by the view pool.


    private RestoreViewFromPoolResult tryRestoreViewFromCache(FacesContext context, UIViewRoot view)
    {
        if (_viewPoolProcessor != null)
        {
            ViewPool viewPool = _viewPoolProcessor.getViewPool(context, view);
            if (viewPool != null)
            {
                ViewStructureMetadata metadata = viewPool.retrieveStaticViewStructureMetadata(context, view);
                if (metadata != null)
                {
                    ViewEntry entry = viewPool.popStaticOrPartialStructureView(context, view);
                    if (entry != null)
                    {
                        _viewPoolProcessor.cloneAndRestoreView(context, view, entry, metadata);
                        return entry.getResult();
                    }

                    states = (Map<String, Object>) state[1];
                    faceletViewState = UIComponentBase.restoreAttachedState(
                            context,states.get(ComponentSupport.FACELET_STATE_INSTANCE));
                    if (faceletViewState != null && _viewPoolProcessor != null)
                    {
                        ViewPool viewPool = _viewPoolProcessor.getViewPool(context, view);
                        if (viewPool != null)
                        {
                            ViewStructureMetadata viewMetadata = viewPool.retrieveDynamicViewStructureMetadata(
                                context, view, (FaceletState) faceletViewState);
                            if (viewMetadata != null)
                            {
                                ViewEntry entry = viewPool.popDynamicStructureView(context, view,
                                        (FaceletState) faceletViewState);
                                if (entry != null)
                                {
                                    skipBuildView = true;
                                    _viewPoolProcessor.cloneAndRestoreView(context, view, entry, viewMetadata);

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Examples of ViewPool

Examples of org.apache.myfaces.view.facelets.pool.ViewPool

Examples of org.apache.myfaces.view.facelets.pool.ViewPool