/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002-2010 Oracle. All rights reserved.
*
*/
package com.sleepycat.je.rep.stream;
import java.nio.ByteBuffer;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.log.LogEntryHeader;
import com.sleepycat.je.log.LogEntryType;
import com.sleepycat.je.log.LogUtils;
import com.sleepycat.je.log.entry.LogEntry;
import com.sleepycat.je.utilint.VLSN;
/**
* Format for messages received at across the wire for replication. Instead of
* sending a direct copy of the log entry as it is stored on the JE log files
* (LogEntryHeader + LogEntry), select parts of the header are sent.
*
* An InputWireRecord de-serializes the logEntry from the message bytes and
* releases any claim on the backing ByteBuffer.
*/
public class InputWireRecord extends WireRecord {
private final LogEntry logEntry;
/**
* Make a InputWireRecord from an incoming replication message buffer for
* applying at a replica.
* @throws DatabaseException
*/
InputWireRecord(ByteBuffer msgBuffer)
throws DatabaseException {
byte entryType = msgBuffer.get();
int entryVersion = LogUtils.readInt(msgBuffer);
int itemSize = LogUtils.readInt(msgBuffer);
VLSN vlsn = new VLSN(LogUtils.readLong(msgBuffer));
this.header = new LogEntryHeader(entryType, entryVersion,
itemSize, vlsn);
/* The entryBuffer is positioned at 0, and is limited to this entry. */
ByteBuffer entryBuffer = msgBuffer.slice();
entryBuffer.limit(itemSize);
logEntry = instantiateEntry(entryBuffer);
}
/**
* Unit test support.
* @throws DatabaseException
*/
InputWireRecord(byte entryType,
int entryVersion,
int itemSize,
VLSN vlsn,
ByteBuffer entryBuffer)
throws DatabaseException {
header = new LogEntryHeader(entryType, entryVersion, itemSize, vlsn);
logEntry = LogEntryType.findType(header.getType()).
getNewLogEntry();
logEntry.readEntry(header, entryBuffer, true /* readFullItem */);
}
public VLSN getVLSN() {
return header.getVLSN();
}
public byte getEntryType() {
return header.getType();
}
public LogEntry getLogEntry() {
return logEntry;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
header.dumpRep(sb);
sb.append(" ");
logEntry.dumpRep(sb);
return sb.toString();
}
/**
* Convert the full version of the log entry to a string.
*/
public String dumpLogEntry() {
StringBuilder sb = new StringBuilder();
sb.append(header);
sb.append(" ").append(logEntry);
return sb.toString();
}
}