com.sap.cds.maven.plugin.util

Class DirectoryWatcher

java.lang.Object

com.sap.cds.maven.plugin.util.DirectoryWatcher

public class DirectoryWatcher
extends Object

Watches a directory, including the sub-tree, for changes on files. With lists of include and exclude GLOB pattern, the watched files can be configured. Only if one of those files has changed, the event listener is notified.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	DirectoryWatcher.FileChangedListener An interface used to listen on file changed events.

Constructor Summary

Constructors

Constructor and Description
DirectoryWatcher(Path root, DirectoryWatcher.FileChangedListener listener, CdsMojoLogger logger, List<String> includes, List<String> excludes) Constructs a new DirectoryWatcher instance.

Method Summary

Modifier and Type	Method and Description
void	join() Joins the watch thread and blocks until it's finished or interrupted.
void	start() Starts asynchronously watching for changes on the file system.
void	stop() Stops watching for changes on file system.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DirectoryWatcher

public DirectoryWatcher(Path root,
                        DirectoryWatcher.FileChangedListener listener,
                        CdsMojoLogger logger,
                        List<String> includes,
                        List<String> excludes)

Constructs a new DirectoryWatcher instance.

Parameters:

root - the root of the directory sub-tree to watch

listener - the event listener

logger - the mandatory logger

includes - an optional list with GLOB patterns describing the files to be include

excludes - an optional list with GLOB patterns describing the files to be exclude

Throws:

NullPointerException - if any of the required arguments is null

Method Detail

start

public void start()
           throws IOException

Starts asynchronously watching for changes on the file system.

Throws:

IOException - if registering for watching failed

join

public void join()
          throws InterruptedException

Joins the watch thread and blocks until it's finished or interrupted.

Throws:

InterruptedException - if current thread is interrupted

stop

public void stop()

Stops watching for changes on file system.