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File lock using Threads in java

Pandian Ranganathan
Greenhorn

Joined: Oct 20, 2009
Posts: 13
Hi,

i am developing file lock concept in java. i am using two threads. first thread is in running state...second thread will wait untill first thread release... i cant make second thread will wait.. i am getting some exception...




i am getting exception like this

Inside Run...
fileC:\CMPS\Migration\Test\Response File.txt
true
Channel sun.nio.ch.FileChannelImpl@addbf1
inside second try.....
inside second try----->sun.nio.ch.FileLockImpl[0:9223372036854775807 exclusive valid]
Inside finally.....
Inside Run...
fileC:\CMPS\Migration\Test\Response File.txt
true
Channel sun.nio.ch.FileChannelImpl@190d11
inside second try.....
Exception java.nio.channels.OverlappingFileLockException
Inside finally.....
java.nio.channels.OverlappingFileLockException
at sun.nio.ch.FileChannelImpl$SharedFileLockTable.checkList(Unknown Source)
at sun.nio.ch.FileChannelImpl$SharedFileLockTable.add(Unknown Source)
at sun.nio.ch.FileChannelImpl.tryLock(Unknown Source)
at java.nio.channels.FileChannel.tryLock(Unknown Source)
at FileTest.run(FileTest.java:26)
at FileTest.main(FileTest.java:53)


Thanks in Advance...
Henry Wong
author
Sheriff

Joined: Sep 28, 2004
Posts: 18717
    
  40

duplicate topic


Books: Java Threads, 3rd Edition, Jini in a Nutshell, and Java Gems (contributor)
 
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subject: File lock using Threads in java