private synchronized void syncLog(ILogRecord logRecord) throws ACIDException {
ITransactionContext txnCtx = null;
if (logRecord.getLogType() != LogType.FLUSH) {
txnCtx = logRecord.getTxnCtx();
if (txnCtx.getTxnState() == ITransactionManager.ABORTED
&& logRecord.getLogType() != LogType.ABORT) {
throw new ACIDException(
"Aborted job(" + txnCtx.getJobId() + ") tried to write non-abort type log record.");
}
}
if (getLogFileOffset(appendLSN.get()) + logRecord.getLogSize() > logFileSize) {
prepareNextLogFile();
appendPage.isFull(true);
getAndInitNewPage();
} else if (!appendPage.hasSpace(logRecord.getLogSize())) {
appendPage.isFull(true);
getAndInitNewPage();
}
if (logRecord.getLogType() == LogType.UPDATE) {
logRecord.setPrevLSN(txnCtx.getLastLSN());
}
appendPage.append(logRecord, appendLSN.get());
if (logRecord.getLogType() == LogType.FLUSH) {
logRecord.setLSN(appendLSN.get());
}
appendLSN.addAndGet(logRecord.getLogSize());
}
@Override
public void log(ILogRecord logRecord) throws ACIDException {
if (logRecord.getLogSize() > logPageSize) {
throw new IllegalStateException();
}
syncLog(logRecord);
if ((logRecord.getLogType() == LogType.JOB_COMMIT || logRecord.getLogType() == LogType.ABORT)
&& !logRecord.isFlushed()) {
synchronized (logRecord) {
while (!logRecord.isFlushed()) {
try {
logRecord.wait();
} catch (InterruptedException e) {
// ignore
}
}
}
}
}