Examples with DALChangeListener com.cosylab.CDB.DALChangeListener used on opensource projects

Example 1 with DALChangeListener

use of com.cosylab.CDB.DALChangeListener in project ACS by ACS-Community.

the class TestJDAL method testChangeListener.

/**
	 * Test ChangeListener
	 * Creates a changeListener object and registers for a curl
	 * then invokes clear_cache for that function in order to get 
	 * a call from JDAL server
	 */
public void testChangeListener() {
    try {
        // we will have change listener so we have to activate POA
        POA rootpoa = POAHelper.narrow(orb.resolve_initial_references("RootPOA"));
        rootpoa.the_POAManager().activate();
        // create our listener
        ChangeListener changeListener = new ChangeListener();
        DALChangeListener cl = changeListener._this(orb);
        // register it
        int listenerID = dal.add_change_listener(cl);
        // tell add that we will listen for 'test'
        dal.listen_for_changes("test", listenerID);
        // our change listener will set objectChanged
        objectChanged = false;
        dal.clear_cache("test");
        // give DAL chance (1s) to call us
        for (int i = 0; i < 10; i++) {
            Thread.sleep(100);
            if (objectChanged)
                break;
        }
        // by now the DAL should call us
        assertTrue(objectChanged);
        // remove it from DAL listeners
        dal.remove_change_listener(listenerID);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Example 2 with DALChangeListener

use of com.cosylab.CDB.DALChangeListener in project ACS by ACS-Community.

the class HibernateWDALImpl method loadListeners.

/**
	 * 
	 */
public void loadListeners() {
    File storageFile = getStorageFile();
    if (storageFile == null || !storageFile.exists())
        return;
    try {
        InputStream in = new FileInputStream(storageFile);
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        // load listeners
        String line;
        while (true) {
            line = reader.readLine();
            if (line == null || line.length() == 0)
                break;
            Integer id = new Integer(line);
            line = reader.readLine();
            if (line == null || line.length() == 0)
                break;
            // try to narrow it 
            DALChangeListener listener = DALChangeListenerHelper.narrow(orb.string_to_object(line));
            synchronized (regListeners) {
                regListeners.put(id, listener);
            }
        }
        // then listened curls
        String curl;
        while (true) {
            curl = reader.readLine();
            if (curl == null)
                break;
            ArrayList<Integer> arr = new ArrayList<Integer>();
            while (true) {
                line = reader.readLine();
                if (line == null || line.length() == 0)
                    break;
                arr.add(new Integer(line));
            }
            synchronized (listenedCurls) {
                listenedCurls.put(curl, arr);
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Example 3 with DALChangeListener

use of com.cosylab.CDB.DALChangeListener in project ACS by ACS-Community.

the class DALImpl method clear_cache.

public void clear_cache(String curl) {
    totalDALInvocationCounter.incrementAndGet();
    // first take care of our own map
    object_changed(curl);
    // then all registered listeners
    ArrayList<Integer> listeners;
    boolean needToSave = false;
    synchronized (listenedCurls) {
        listeners = listenedCurls.get(curl);
    }
    if (listeners == null)
        return;
    ArrayList<Integer> invalidListeners = new ArrayList<Integer>();
    for (int i = 0; i < listeners.size(); i++) {
        DALChangeListener listener;
        synchronized (listenedCurls) {
            listener = regListeners.get(listeners.get(i));
        }
        try {
            //System.out.println("Calling " + listener + " ...");
            listener.object_changed(curl);
        //System.out.println("Done " + listener);
        } catch (RuntimeException e) {
            // silent here because who knows what happened with clients
            invalidListeners.add(listeners.get(i));
        }
    }
    synchronized (listenedCurls) {
        // now remove invalid listeners if any
        for (int i = 0; i < invalidListeners.size(); i++) {
            listeners.remove(invalidListeners.get(i));
            regListeners.remove(invalidListeners.get(i));
            needToSave = true;
        }
        if (needToSave) {
            cleanListenedCurls();
            saveListeners();
        }
    }
}

Example 4 with DALChangeListener

use of com.cosylab.CDB.DALChangeListener in project ACS by ACS-Community.

the class DALImpl method cleanListenedCurls.

/**
	 * Cleans listened curls from invalid listeners
	 * to avoid repeatedly calling invalid listeners
	 */
protected void cleanListenedCurls() {
    Iterator<String> iter = listenedCurls.keySet().iterator();
    while (iter.hasNext()) {
        String curl = iter.next();
        ArrayList<Integer> listeners = listenedCurls.get(curl);
        if (listeners == null)
            continue;
        for (int i = 0; i < listeners.size(); i++) {
            DALChangeListener listener = regListeners.get(listeners.get(i));
            if (listener == null) {
                listeners.remove(i);
                i--;
            }
        }
    }
}

Example 5 with DALChangeListener

use of com.cosylab.CDB.DALChangeListener in project ACS by ACS-Community.

the class DALImpl method loadListeners.

/**
	 * 
	 */
public void loadListeners() {
    if (disableRecoveryFile)
        return;
    File storageFile = getStorageFile();
    if (storageFile == null || !storageFile.exists()) {
        return;
    }
    BufferedReader reader = null;
    try {
        InputStream in = new FileInputStream(storageFile);
        reader = new BufferedReader(new InputStreamReader(in));
        synchronized (listenedCurls) {
            // load listeners
            String line;
            while (true) {
                line = reader.readLine();
                if (line == null || line.length() == 0)
                    break;
                Integer id = new Integer(line);
                line = reader.readLine();
                if (line == null || line.length() == 0)
                    break;
                // try to narrow it 
                DALChangeListener listener = DALChangeListenerHelper.narrow(orb.string_to_object(line));
                regListeners.put(id, listener);
            }
            // then listened curls
            String curl;
            while (true) {
                curl = reader.readLine();
                if (curl == null)
                    break;
                ArrayList<Integer> arr = new ArrayList<Integer>();
                while (true) {
                    line = reader.readLine();
                    if (line == null || line.length() == 0)
                        break;
                    arr.add(new Integer(line));
                }
                listenedCurls.put(curl, arr);
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }
}