package com.ibm.jnio;
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
public class UseFileLocks
{
static private final int start = 10;
static private final int end = 20;
static public void main( String args[] ) throws Exception {
// Get file channel
RandomAccessFile raf = new RandomAccessFile( "usefilelocks.txt", "rw" );
FileChannel fc = raf.getChannel();
// Get lock
System.out.println( "trying to get lock" );
FileLock lock = fc.lock( start, end, false );
System.out.println( "got lock!" );
// Pause
System.out.println( "pausing" );
try { Thread.sleep( 3000 ); } catch( InterruptedException ie ) {}
// Release lock
System.out.println( "going to release lock" );
lock.release();
System.out.println( "released lock" );
raf.close();
}
}