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

Package org.apache.commons.configuration2.reloading

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

org.apache.commons.configuration2.sync.Synchronizer

A specialized implementation of {@code ReloadingDetector} which monitors afile specified by a {@link FileHandler}.

An instance of this class is passed a {@code FileHandler} at constructiontime. Each time the {@code isReloadingRequired()} method is called, it checkswhether the {@code FileHandler} points to a valid location. If this is thecase, the file's last modification time is obtained and compared with the last stored time. If it has changed, a reload operation should be performed.

Because file I/O may be expensive it is possible to configure a refresh delay as a time in milliseconds. This is the minimum interval between two checks. If the {@code isReloadingRequired()} method is called in shorter intervals,it does not perform a check, but directly returns false.

To initialize an instance either {@code isReloadingRequired()} or{@code reloadingPerformed()} can be called. The first call of{@code isReloadingRequired} does not perform a check, but obtains the initialmodification date of the monitored file. {@code reloadingPerformed()} alwaysobtains the file's modification date and stores it internally.
@version $Id: FileHandlerReloadingDetector.java 1624601 2014-09-12 18:04:36Z oheger $ @since 2.0

        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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    public ReloadingDetector createReloadingDetector(FileHandler handler,
            FileBasedBuilderParametersImpl params)
            throws ConfigurationException
    {
        Long refreshDelay = params.getReloadingRefreshDelay();
        return (refreshDelay != null) ? new FileHandlerReloadingDetector(
                handler, refreshDelay) : new FileHandlerReloadingDetector(
                handler);
    }

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        FileHandler handler = new FileHandler();
        FileBasedBuilderParametersImpl params =
                new FileBasedBuilderParametersImpl();
        final Long refreshDelay = 10000L;
        params.setReloadingRefreshDelay(refreshDelay);
        FileHandlerReloadingDetector detector =
                (FileHandlerReloadingDetector) factory.createReloadingDetector(
                        handler, params);
        assertSame("Wrong file handler", handler, detector.getFileHandler());
        assertEquals("Wrong refresh delay", refreshDelay.longValue(),
                detector.getRefreshDelay());
    }

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            throws ConfigurationException
    {
        FileHandler handler = new FileHandler();
        FileBasedBuilderParametersImpl params =
                new FileBasedBuilderParametersImpl();
        FileHandlerReloadingDetector detector =
                (FileHandlerReloadingDetector) factory.createReloadingDetector(
                        handler, params);
        assertTrue("No default refresh delay", detector.getRefreshDelay() != 0);
    }

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                        PropertiesConfiguration.class);
        FileHandler handler = new FileHandler();
        FileBasedBuilderParametersImpl params = new FileBasedBuilderParametersImpl();
        long refreshDelay = 60000L;
        params.setReloadingRefreshDelay(refreshDelay);
        FileHandlerReloadingDetector detector =
                (FileHandlerReloadingDetector) builder.createReloadingDetector(
                        handler, params);
        assertSame("Wrong file handler", handler, detector.getFileHandler());
        assertEquals("Wrong refresh delay", refreshDelay,
                detector.getRefreshDelay());
    }

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            config.addConfiguration(new BaseHierarchicalConfiguration());
        }
        config.getConfiguration(0).addProperty(KEY_CONCURRENT, TEST_NAME);


        // Set a single synchronizer for all involved configurations
        Synchronizer sync = new ReadWriteSynchronizer();
        config.setSynchronizer(sync);
        for (Configuration c : config.getConfigurations())
        {
            c.setSynchronizer(sync);
        }

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     * @since 2.0
     */
    @Override
    public final Synchronizer getSynchronizer()
    {
        Synchronizer sync = synchronizer;
        return (sync != null) ? sync : NoOpSynchronizer.INSTANCE;
    }

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            config.addConfiguration(new BaseHierarchicalConfiguration());
        }
        config.getConfiguration(0).addProperty(KEY_CONCURRENT, TEST_NAME);


        // Set a single synchronizer for all involved configurations
        Synchronizer sync = new ReadWriteSynchronizer();
        config.setSynchronizer(sync);
        for (Configuration c : config.getConfigurations())
        {
            c.setSynchronizer(sync);
        }

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