Example usage for org.apache.commons.jci.listeners FileChangeListener FileChangeListener

Introduction

In this page you can find the example usage for org.apache.commons.jci.listeners FileChangeListener FileChangeListener.

Prototype

FileChangeListener

Source Link

Usage

From source file:org.apache.commons.jci.examples.configuration.ConfigurationReloading.java

private void run(String[] args) {

    final File configFile = new File("some.properties");

    System.out.println("Watching " + configFile.getAbsolutePath());

    final Collection<Configurable> configurables = new ArrayList<Configurable>();

    final FilesystemAlterationListener listener = new FileChangeListener() {
        public void onStop(FilesystemAlterationObserver pObserver) {
            super.onStop(pObserver);

            if (hasChanged()) {
                System.out.println("Configuration change detected " + configFile);

                final Properties props = new Properties();
                InputStream is = null;
                try {
                    is = new FileInputStream(configFile);
                    props.load(is);//ww  w .  j  a  va2s  . c o  m

                    System.out.println("Notifying about configuration change " + configFile);

                    for (Configurable configurable : configurables) {
                        configurable.configure(props);
                    }

                } catch (Exception e) {
                    System.err.println("Failed to load configuration " + configFile);
                } finally {
                    try {
                        is.close();
                    } catch (IOException e) {
                    }
                }

            }
        }
    };

    fam.addListener(configFile, listener);
    fam.start();

    configurables.add(new Something());

    while (true) {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
        }
    }
}

---