[JCR-2872] DataStore: changing the modified date fails if the file is open for reading (Windows only)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.2.4
• Component/s: jackrabbit-core
• Environment: Windows
• Assignee: Thomas Mueller
• Reporter: Thomas Mueller
• Created: 01/Feb/11 15:02
• Updated: 17/Feb/11 15:49
• Resolved: 02/Feb/11 10:00

Description

If the file is open for reading, Windows doesn't allow to change the last modified time using File.setLastModified():

org.apache.jackrabbit.core.data.DataStoreException: Failed to update record
modified date: 2ac72495fd1e270777821b8a872903c79c84a8d9
at org.apache.jackrabbit.core.data.FileDataStore.addRecord(FileDataStore.java:250)
at org.apache.jackrabbit.core.value.BLOBInDataStore.getInstance(BLOBInDataStore.java:119)
at org.apache.jackrabbit.core.value.InternalValue.getBLOBFileValue(InternalValue.java:619)
at org.apache.jackrabbit.core.value.InternalValue.create(InternalValue.java:369)
at org.apache.jackrabbit.core.value.InternalValueFactory.create(InternalValueFactory.java:94)
at org.apache.jackrabbit.core.value.ValueFactoryImpl.createBinary(ValueFactoryImpl.java:74)

Test case and possible workaround:

import java.io.File;
import java.io.FileInputStream;
import java.io.RandomAccessFile;
public class Test {
public static void main(String... args) throws Exception {
String name = "test.txt";
File test = new File(name);
RandomAccessFile r = new RandomAccessFile(name, "rw");
r.write(0);
r.close();
long mod = test.lastModified();
Thread.sleep(3000);
FileInputStream in = new FileInputStream(name);
if (!test.setLastModified(test.lastModified()+1)) {
if (!test.canWrite())

{ System.out.println("Can't write to " + name); } else { System.out.println("canWrite ok"); r = new RandomAccessFile(name, "rw"); int old = r.read(); r.seek(0); r.write(old); r.close(); }
} else { System.out.println("setLastModified ok"); }
System.out.println("Modified old: " + mod);
System.out.println("Modified now: " + test.lastModified());
in.close();
System.out.println("input closed");
if (!test.setLastModified(test.lastModified()+1)) {
if (!test.canWrite()) { System.out.println("Can't write to " + name); }

else

{ System.out.println("canWrite ok"); }

} else

{ System.out.println("setLastModified ok"); }

new File(name).delete();
}
}