TxnEnd.java

package com.sleepycat.je.txn;
import java.nio.ByteBuffer;
import java.sql.Timestamp;
import com.sleepycat.je.log.LogEntryType;
import com.sleepycat.je.log.LogReadable;
import com.sleepycat.je.log.LogUtils;
import com.sleepycat.je.log.LoggableObject;
import com.sleepycat.je.utilint.DbLsn;
import de.ovgu.cide.jakutil.*;
/** 
 * This class writes out a transaction commit or transaction end record.
 */
public abstract class TxnEnd implements LoggableObject, LogReadable {
  protected long id;
  protected Timestamp time;
  private long lastLsn;
  TxnEnd(  long id,  long lastLsn){
    this.id=id;
    time=new Timestamp(System.currentTimeMillis());
    this.lastLsn=lastLsn;
  }
  /** 
 * For constructing from the log
 */
  public TxnEnd(){
    lastLsn=DbLsn.NULL_LSN;
  }
  public long getId(){
    return id;
  }
  long getLastLsn(){
    return lastLsn;
  }
  protected abstract String getTagName();
  /** 
 * @see LoggableObject#getLogType
 */
  public abstract LogEntryType getLogType();
  /** 
 * @see LoggableObject#marshallOutsideWriteLatchCan be marshalled outside the log write latch.
 */
  public boolean marshallOutsideWriteLatch(){
    return true;
  }
  /** 
 * @see LoggableObject#countAsObsoleteWhenLogged
 */
  public boolean countAsObsoleteWhenLogged(){
    return false;
  }
  /** 
 * @see LoggableObject#postLogWork
 */
  public void postLogWork(  long justLoggedLsn){
  }
  /** 
 * @see LoggableObject#getLogSize
 */
  public int getLogSize(){
    return LogUtils.LONG_BYTES + LogUtils.getTimestampLogSize() + LogUtils.getLongLogSize();
  }
  /** 
 * @see LoggableObject#writeToLog
 */
  public void writeToLog(  ByteBuffer logBuffer){
    LogUtils.writeLong(logBuffer,id);
    LogUtils.writeTimestamp(logBuffer,time);
    LogUtils.writeLong(logBuffer,lastLsn);
  }
  /** 
 * @see LogReadable#readFromLog
 */
  public void readFromLog(  ByteBuffer logBuffer,  byte entryTypeVersion){
    id=LogUtils.readLong(logBuffer);
    time=LogUtils.readTimestamp(logBuffer);
    lastLsn=LogUtils.readLong(logBuffer);
  }
  /** 
 * @see LogReadable#dumpLog
 */
  public void dumpLog(  StringBuffer sb,  boolean verbose){
    sb.append("<").append(getTagName());
    sb.append(" id=\"").append(id);
    sb.append("\" time=\"").append(time);
    sb.append("\">");
    sb.append(DbLsn.toString(lastLsn));
    sb.append("</").append(getTagName()).append(">");
  }
  /** 
 * @see LogReadable#logEntryIsTransactional
 */
  public boolean logEntryIsTransactional(){
    return true;
  }
  /** 
 * @see LogReadable#getTransactionId
 */
  public long getTransactionId(){
    return id;
  }
}