/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002, 2011 Oracle and/or its affiliates. All rights reserved.
*
*/
package com.sleepycat.je.recovery;
import java.nio.ByteBuffer;
import java.util.Calendar;
import com.sleepycat.je.log.LogUtils;
import com.sleepycat.je.log.Loggable;
import com.sleepycat.je.utilint.Timestamp;
/**
* CheckpointStart creates a log entry that marks the beginning of a
* checkpoint.
*/
public class CheckpointStart implements Loggable {
private Timestamp startTime;
private long id;
/*
* invoker is just a way to tag each checkpoint in the log for easier log
* based debugging. It will tell us whether the checkpoint was invoked by
* recovery, the daemon, the api, or the cleaner.
*/
private String invoker;
public CheckpointStart(long id, String invoker) {
Calendar cal = Calendar.getInstance();
this.startTime = new Timestamp(cal.getTime().getTime());
this.id = id;
if (invoker == null) {
this.invoker = "";
} else {
this.invoker = invoker;
}
}
/* For logging only. */
public CheckpointStart() {
}
/*
* Logging support for writing.
*/
/**
* @see Loggable#getLogSize
*/
public int getLogSize() {
return LogUtils.getTimestampLogSize(startTime) +
LogUtils.getPackedLongLogSize(id) +
LogUtils.getStringLogSize(invoker);
}
/**
* @see Loggable#writeToLog
*/
public void writeToLog(ByteBuffer logBuffer) {
LogUtils.writeTimestamp(logBuffer, startTime);
LogUtils.writePackedLong(logBuffer, id);
LogUtils.writeString(logBuffer, invoker);
}
/**
* @see Loggable#readFromLog
*/
public void readFromLog(ByteBuffer logBuffer, int entryVersion) {
boolean unpacked = (entryVersion < 6);
startTime = LogUtils.readTimestamp(logBuffer, unpacked);
id = LogUtils.readLong(logBuffer, unpacked);
invoker = LogUtils.readString(logBuffer, unpacked);
}
/**
* @see Loggable#dumpLog
*/
public void dumpLog(StringBuilder sb, boolean verbose) {
sb.append("<CkptStart invoker=\"").append(invoker);
sb.append("\" time=\"").append(startTime);
sb.append("\" id=\"").append(id);
sb.append("\"/>");
}
/**
* @see Loggable#getTransactionId
*/
public long getTransactionId() {
return 0;
}
/**
* @see Loggable#logicalEquals
* Always return false, this item should never be compared.
*/
public boolean logicalEquals(Loggable other) {
return false;
}
}