Examples of org.apache.commons.configuration2.reloading.ReloadingController

Package org.apache.commons.configuration2.reloading

Examples of org.apache.commons.configuration2.reloading.ReloadingController

org.apache.commons.configuration2.io.FileLocator
A class for adding support for reload operations in a generic way.

A {@code ReloadingController} monitors a specific source and triggersreloading events if necessary. So it does not perform reloading itself, but only sends out notifications when it thinks that this should be done. This allows for a very generic setup in which different components involved in reloading are loosely coupled via events.

A typical usage scenario is as follows:
- A {@code ReloadingController} instance is created and initialized with a{@link ReloadingDetector} object.
- A number of {@link EventListener} objects for reloading events can beregistered at the controller.
- Now the controller's {@code checkForReloading()} method is calledwhenever a check is to be performed. This could be done for instance by a timer in regular intervals or by any other means appropriate for a specific application.
- When a check reveals that a reload operation is necessary all registered event listeners are notified.
- Typically one of the listeners is responsible to perform the actual reload operation. (How this is done is not in the scope of the controller object.) After this has been done, the controller's {@code resetReloadingState()} method must be called. It tells the controllerthat the last notification has been processed and that new checks are possible again. It is important that this method is called. Otherwise, {@code checkForReloading()} will not do any new checks or send out eventnotifications any more.
This class can be accessed from multiple threads concurrently. It shields the associated {@link ReloadingDetector} object for concurrent access, so that aconcrete detector implementation does not have to be thread-safe.
@version $Id: ReloadingController.java 1624601 2014-09-12 18:04:36Z oheger $ @since 2.0

    protected void cloneInterpolator(AbstractConfiguration orgConfig)
    {
        interpolator = new AtomicReference<ConfigurationInterpolator>();
        ConfigurationInterpolator orgInterpolator = orgConfig.getInterpolator();
        List<Lookup> defaultLookups = orgInterpolator.getDefaultLookups();
        Lookup lookup = findConfigurationLookup(orgInterpolator, orgConfig);
        if (lookup != null)
        {
            defaultLookups.remove(lookup);
        }

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    @Before
    public void setUp() throws Exception
    {
        // any concrete class will do
        PropertiesConfiguration c = new PropertiesConfiguration();
        new FileHandler(c).load(ConfigurationAssert
                .getTestFile("test.properties"));
        sync = new SynchronizerTestImpl();
        c.setSynchronizer(sync);
        config = c;
    }

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    @Before
    public void setUp() throws Exception
    {
        CompositeConfiguration cc = new CompositeConfiguration();
        PropertiesConfiguration pc = new PropertiesConfiguration();
        FileHandler handler = new FileHandler(pc);
        handler.setFileName(testProperties);
        handler.load();
        cc.addConfiguration(pc);
        conf = cc;
        nonStringTestHolder.setConfiguration(conf);
    }

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    @Before
    public void setUp() throws Exception
    {
        XMLConfiguration c = new XMLConfiguration();
        testFile = ConfigurationAssert.getTestFile("test.xml");
        new FileHandler(c).load(testFile);
        sync = new SynchronizerTestImpl();
        c.setSynchronizer(sync);
        config = c;
    }

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        {
            throw new ConfigurationException("Cannot resolve include file "
                    + fileName);
        }


        FileHandler fh = new FileHandler(this);
        fh.load(url);
    }

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    @Test
    public void testEquals() throws Exception
    {
        PropertiesConfiguration conf = new PropertiesConfiguration();
        FileHandler handler = new FileHandler(conf);
        handler.setFileName(testProperties);
        handler.load();


        String equals = conf.getString("test.equals");
        assertEquals("value=one", equals);
    }

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    public void testSetSystemPropertiesFromPropertiesFile()
            throws ConfigurationException, IOException
    {
        File file = folder.newFile("sys.properties");
        PropertiesConfiguration pconfig = new PropertiesConfiguration();
        FileHandler handler = new FileHandler(pconfig);
        pconfig.addProperty("fromFile", Boolean.TRUE);
        handler.setFile(file);
        handler.save();
        SystemConfiguration.setSystemProperties(handler.getBasePath(),
                handler.getFileName());
        SystemConfiguration sconf = new SystemConfiguration();
        assertTrue("Property from file not found", sconf.getBoolean("fromFile"));
    }

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        XMLConfiguration x3 = new XMLConfiguration(config);
        assertEquals("Wrong element value", "value2.2", x3.getString("key2"));
        assertEquals("Wrong attribute value", "USER2",
                x3.getString("key2[@override]"));
        StringWriter w = new StringWriter();
        new FileHandler(x3).save(w);
        String s = w.toString();
        x3 = new XMLConfiguration();
        new FileHandler(x3).load(new StringReader(s));
        assertEquals("Wrong element value after load", "value2.2",
                x3.getString("key2"));
        assertEquals("Wrong attribute value after load", "USER2",
                x3.getString("key2[@override]"));
    }

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            InterruptedException
    {
        // populate the test combined configuration
        setUpSourceTest();
        XMLConfiguration xmlConf = new XMLConfiguration();
        new FileHandler(xmlConf).load(ConfigurationAssert
                .getTestFile("test.xml"));
        config.addConfiguration(xmlConf);
        PropertiesConfiguration propConf = new PropertiesConfiguration();
        new FileHandler(propConf).load(ConfigurationAssert
                .getTestFile("test.properties"));
        for (int i = 0; i < 8; i++)
        {
            config.addConfiguration(new BaseHierarchicalConfiguration());
        }

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     * @return the URL of the include file or <b>null</b> if it cannot be
     *         resolved
     */
    private URL locateIncludeFile(String basePath, String fileName)
    {
        FileLocator includeLocator =
                FileLocatorUtils.fileLocator(locator).sourceURL(null)
                        .basePath(basePath).fileName(fileName).create();
        return FileLocatorUtils.locate(includeLocator);
    }

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