dk.netarkivet.archive.arcrepositoryadmin
Class ReadOnlyAdminData

java.lang.Object
  dk.netarkivet.archive.arcrepositoryadmin.AdminData
      dk.netarkivet.archive.arcrepositoryadmin.ReadOnlyAdminData

Deprecated. This class is only used by the deprecated class FileBasedActiveBitPreservation.

@Deprecated
public class ReadOnlyAdminData
extends AdminData

A version of AdminData that cannot be changed, but which allows synchronization through a file. To avoid excessive reading of the admin data file and constant stat() calls, users of this are required call synchronize() before major chunks of use to ensure that the data are up to date. Implementation note: Two alternative synch strategies are

1) Recreate ReadOnlyAdminData before every use -- this requires reading the entire file again (millions of lines).
2) Synchronize at every entry point (hasEntry, getState etc) -- this requires an expensive stat() call before every action, costly when iterating.

Field Summary

protected long

lastModified Deprecated. The time the underlying file (adminDataFile) was last read in.

Fields inherited from class dk.netarkivet.archive.arcrepositoryadmin.AdminData

ADMIN_FILE_NAME, adminDataFile, adminDir, knownBitArchives, storeEntries, VERSION_NUMBER

Constructor Summary

ReadOnlyAdminData()
Deprecated.

Method Summary

static ReadOnlyAdminData	getInstance() Deprecated. Returns _an_ instance if admin data.
protected void	read() Deprecated. Read admin data.
void	synchronize() Deprecated. Make sure that the internal admin data set is synchronized to the file.

Methods inherited from class dk.netarkivet.archive.arcrepositoryadmin.AdminData

getAllFileNames, getAllFileNames, getCheckSum, getEntry, getReadOnlyInstance, getState, getUpdateableInstance, hasEntry, hasReplyInfo, hasState, toString

Methods inherited from class java.lang.Object

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

Field Detail

lastModified

protected long lastModified

Deprecated.

The time the underlying file (adminDataFile) was last read in. If 0, we have never read admin data (the file doesn't exist).

Constructor Detail

ReadOnlyAdminData

public ReadOnlyAdminData()

Deprecated.

See Also:

AdminData.AdminData()

Method Detail

getInstance

public static ReadOnlyAdminData getInstance()

Deprecated.

Returns _an_ instance if admin data. This is _not_ a singleton.

Returns:

An instance of ReadOnlyAdminData

read

protected void read()

Deprecated.

Read admin data. This should not be used, use synchronize instead, which only rereads when necessary.

Overrides:

read in class AdminData

synchronize

public void synchronize()

Deprecated.

Make sure that the internal admin data set is synchronized to the file.