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Java Example of org.apache.commons.io.monitor
Where can I find an example Java code that uses the org.apache.commons.io.monitor package?
✍: FYIcenter.com
org.apache.commons.io.monitor package provides a component for monitoring
file system events (directory and file create, update and delete events).
Andrei Ciobanu provided a good Java example that uses the org.apache.commons.io.monitor package at andreINC.net Website.
// Source: andreINC.net Website // Supports commons-io-2.6 // Supports commons-io-2.5 import java.io.File; import java.io.IOException; import org.apache.commons.io.monitor.FileAlterationListener; import org.apache.commons.io.monitor.FileAlterationListenerAdaptor; import org.apache.commons.io.monitor.FileAlterationMonitor; import org.apache.commons.io.monitor.FileAlterationObserver; public class SimpleTestMonitor { // A hardcoded path to a folder you are monitoring . public static final String FOLDER = "/temp"; public static void main(String[] args) throws Exception { // The monitor will perform polling on the folder every 5 seconds final long pollingInterval = 5 * 1000; File folder = new File(FOLDER); if (!folder.exists()) { // Test to see if monitored folder exists throw new RuntimeException("Directory not found: " + FOLDER); } FileAlterationObserver observer = new FileAlterationObserver(folder); FileAlterationMonitor monitor = new FileAlterationMonitor(pollingInterval); FileAlterationListener listener = new FileAlterationListenerAdaptor() { // Is triggered when a file is created in the monitored folder @Override public void onFileCreate(File file) { try { // "file" is the reference to the newly created file System.out.println("File created: " + file.getCanonicalPath()); } catch (IOException e) { e.printStackTrace(System.err); } } // Is triggered when a file is deleted from the monitored folder @Override public void onFileDelete(File file) { try { // "file" is the reference to the removed file System.out.println("File removed: " + file.getCanonicalPath()); // "file" does not exists anymore in the location System.out.println("File still exists in location: " + file.exists()); } catch (IOException e) { e.printStackTrace(System.err); } } }; observer.addListener(listener); monitor.addObserver(observer); monitor.start(); } }
You can compile and run the above example in a command window as shown below:
C:\fyicenter>javac -cp C:\fyicenter\commons-io-2.6\commons-io-2.6.jar SimpleTestMonitor.java C:\fyicenter>java -cp .;C:\fyicenter\commons-io-2.6\commons-io-2.6.jar SimpleTestMonitor
Then copy and paste the Java code file to the C:\temp folder. You see a new message displayed in the command window:
File created: C:\temp\SimpleTestMonitor.java
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⇒ More Java Example on Apache Commons IO JAR
⇠Java Example of org.apache.commons.io.comparator
2017-04-28, 2638👍, 0💬
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