/**
* param @ table - name of table for which we are maintaining this commit log. param @
* recoverymode - is commit log being instantiated in in recovery mode.
*/
private CommitLog() {
try {
DatabaseDescriptor.createAllDirectories();
segmentSize = DatabaseDescriptor.getCommitLogSegmentSize();
} catch (IOException e) {
throw new IOError(e);
}
// all old segments are recovered and deleted before CommitLog is instantiated.
// All we need to do is create a new one.
segments.add(new CommitLogSegment());
executor =
DatabaseDescriptor.getCommitLogSync() == Config.CommitLogSync.batch
? new BatchCommitLogExecutorService()
: new PeriodicCommitLogExecutorService(this);
}
@VisibleForTesting
CommitLog(String location, CommitLogArchiver archiver) {
compressorClass = DatabaseDescriptor.getCommitLogCompression();
this.location = location;
ICompressor compressor =
compressorClass != null ? CompressionParameters.createCompressor(compressorClass) : null;
DatabaseDescriptor.createAllDirectories();
this.compressor = compressor;
this.archiver = archiver;
metrics = new CommitLogMetrics();
executor =
DatabaseDescriptor.getCommitLogSync() == Config.CommitLogSync.batch
? new BatchCommitLogService(this)
: new PeriodicCommitLogService(this);
allocator = new CommitLogSegmentManager(this);
// register metrics
metrics.attach(executor, allocator);
}
private static void mkdirs() {
DatabaseDescriptor.createAllDirectories();
}