Examples with IndexingDaemonEventObject org.apache.stanbol.entityhub.indexing.core.impl.IndexingDaemon.IndexingDaemonEventObject used on opensource projects

Example 1 with IndexingDaemonEventObject

use of org.apache.stanbol.entityhub.indexing.core.impl.IndexingDaemon.IndexingDaemonEventObject in project stanbol by apache.

the class IndexerImpl method startAndWait.

/**
     * Internally used to start the indexing/post-processing daemons and wait
     * until they have finished.
     * @param activeIndexingDeamons the deamos to start
     */
private void startAndWait(final SortedSet<IndexingDaemon<?, ?>> activeIndexingDeamons) {
    //We need an listener for the IndexingDaemons we are about to start!
    final IndexingDaemonListener listener = new IndexingDaemonListener() {

        @Override
        public void indexingDaemonFinished(IndexingDaemonEventObject indexingDaemonEventObject) {
            //looks like one has finished
            IndexingDaemon<?, ?> indexingDaemon = indexingDaemonEventObject.getSource();
            //handle the finished indexing daemon
            handleFinishedIndexingDaemon(activeIndexingDeamons, indexingDaemon);
            //finally remove the listener
            indexingDaemon.removeIndexingDaemonListener(this);
        }
    };
    //now start the IndexingDaemons in their own Threads
    Set<IndexingDaemon<?, ?>> deamonCopy = new HashSet<IndexingDaemon<?, ?>>(activeIndexingDeamons);
    for (IndexingDaemon<?, ?> deamon : deamonCopy) {
        //add the listener
        deamon.addIndexingDaemonListener(listener);
        // create the thread
        Thread thread = new Thread(deamon);
        //ensure that the JVM can terminate
        thread.setDaemon(true);
        // set the name of the thread
        thread.setName(deamon.getName());
        //start the Thread
        thread.start();
    }
    //now we need to wait until all Threads have finished ...
    while (!activeIndexingDeamons.isEmpty()) {
        synchronized (activeIndexingDeamons) {
            try {
                activeIndexingDeamons.wait();
            } catch (InterruptedException e) {
            //year ... looks like we are done
            }
        }
    }
//done!
}