package at.gv.egovernment.moa.spss.server.service;

import java.util.Date;

import iaik.pki.revocation.RevocationSourceTypes;
import iaik.pki.store.revocation.archive.Archive;
import iaik.pki.store.revocation.archive.ArchiveFactory;

import at.gv.egovernment.moa.logging.LogMsg;
import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.BoolUtils;

import at.gv.egovernment.moa.spss.server.config.ConfigurationProvider;
import at.gv.egovernment.moa.spss.server.logging.TransactionId;
import at.gv.egovernment.moa.spss.util.MessageProvider;

/**
 * A <code>Runnable</code> for periodically cleaning up the revocation archive. 
 * @author Patrick Peck
 * @version $Id$
 */
public class RevocationArchiveCleaner implements Runnable {

  /** The inverval between two clean-ups of the revocation archive. */
  private long archiveCleanupInterval;

  /**
   * Create a new <code>RevocationArchiveCleaner</code>.
   * 
   * @param archiveCleanupInterval The interval between two clean-ups of the
   * revocation archive.
   */
  public RevocationArchiveCleaner(long archiveCleanupInterval) {
    this.archiveCleanupInterval = archiveCleanupInterval;
  }

  /**
   * Run the <code>RevocationArchiveCleaner</code> in its own 
   * <code>Thread</code>.
   */
  public void run() {
    while (true) {
      try {
        ConfigurationProvider config =
          ConfigurationProvider.getInstance();
        String archiveInfo =
          config.getGenericConfiguration(
            ConfigurationProvider.ARCHIVE_REVOCATION_INFO_PROPERTY,
            "false");

        if (BoolUtils.valueOf(archiveInfo)) {
          Archive archive = ArchiveFactory.getInstance().getArchive();
          long archiveDurationMillis =
            (long) config.getCRLArchiveDuration() * 86400000;

          // delete old archive data
          if (archiveDurationMillis > 0) {
            Date olderThan =
              new Date(System.currentTimeMillis() - archiveDurationMillis);

            archive.deleteOldArchiveEntries(
              RevocationSourceTypes.CRL,
              olderThan,
              new TransactionId("RevocationArchiveCleaner"));
          }
        }

      } catch (Exception e) {
        MessageProvider msg = MessageProvider.getInstance();
        Logger.error(new LogMsg(msg.getMessage("init.02", null)), e);
      }

      // sleep 
      try {
        Thread.sleep(archiveCleanupInterval * 1000);
      } catch (InterruptedException e) {
        // ok to do nothing here
      }

    }
  }

}