+ /**
+ * Blocking method that initialises and returns the shared instance of the SequenceFetcher client
+ * @param guiWindow - where the initialisation delay message should be shown
+ * @return the singleton instance of the sequence fetcher client
+ */
+ public static jalview.ws.SequenceFetcher getSequenceFetcherSingleton(final IProgressIndicator guiWindow) {
+ if (sfetch == null
+ || dasRegistry != DasSourceBrowser.getDasRegistryURL())
+ {
+ /**
+ * give a visual indication that sequence fetcher construction is
+ * occuring
+ */
+ if (guiWindow != null)
+ {
+ guiWindow.setProgressBar(
+ "Initialising Sequence Database Fetchers", Thread.currentThread()
+ .hashCode());
+ }
+ dasRegistry = DasSourceBrowser.getDasRegistryURL();
+ jalview.ws.SequenceFetcher sf = new jalview.ws.SequenceFetcher();
+ if (guiWindow != null)
+ {
+ guiWindow.setProgressBar(
+ "Initialising Sequence Database Fetchers", Thread.currentThread().hashCode());
+ }
+ sfetch = sf;