private void updateCommits(List<IndexCommit> commits) {
// to be safe, we should only call delete on a commit point passed to us
// in this specific call (may be across diff IndexWriter instances).
// this will happen rarely, so just synchronize everything
// for safety and to avoid race conditions
synchronized (this) {
long maxCommitAgeTimeStamp = -1L;
IndexCommit newest = commits.get(commits.size() - 1);
log.info("newest commit = " + newest.getVersion());
int singleSegKept = (newest.getSegmentCount() == 1) ? 1 : 0;
int totalKept = 1;
// work our way from newest to oldest, skipping the first since we always want to keep it.
for (int i = commits.size() - 2; i >= 0; i--) {
IndexCommit commit = commits.get(i);
// delete anything too old, regardless of other policies
try {
if (maxCommitAge != null) {
if (maxCommitAgeTimeStamp == -1) {
DateMathParser dmp = new DateMathParser(DateField.UTC, Locale.US);
maxCommitAgeTimeStamp = dmp.parseMath(maxCommitAge).getTime();
}
if (commit.getTimestamp() < maxCommitAgeTimeStamp) {
commit.delete();
continue;
}
}
} catch (Exception e) {
log.warn("Exception while checking commit point's age for deletion", e);
}
if (singleSegKept < maxOptimizedCommitsToKeep && commit.getSegmentCount() == 1) {
totalKept++;
singleSegKept++;
continue;
}
if (totalKept < maxCommitsToKeep) {
totalKept++;
continue;
}
commit.delete();
}
} // end synchronized
}
/**
* Parses a String which may be a date followed by an optional math expression.
*
* @param now an optional fixed date to use as "NOW" in the DateMathParser
* @param val the string to parse
*/
public Date parseMathLenient(Date now, String val, SolrQueryRequest req) {
String math = null;
final DateMathParser p = new DateMathParser();
if (null != now) p.setNow(now);
if (val.startsWith(NOW)) {
math = val.substring(NOW.length());
} else {
final int zz = val.indexOf(Z);
if (0 < zz) {
math = val.substring(zz + 1);
try {
// p.setNow(toObject(val.substring(0,zz)));
p.setNow(parseDateLenient(val.substring(0, zz + 1), req));
} catch (ParseException e) {
throw new SolrException(
SolrException.ErrorCode.BAD_REQUEST,
"Invalid Date in Date Math String:'" + val + '\'',
e);
}
} else {
throw new SolrException(
SolrException.ErrorCode.BAD_REQUEST, "Invalid Date String:'" + val + '\'');
}
}
if (null == math || math.equals("")) {
return p.getNow();
}
try {
return p.parseMath(math);
} catch (ParseException e) {
throw new SolrException(
SolrException.ErrorCode.BAD_REQUEST, "Invalid Date Math String:'" + val + '\'', e);
}
}
@Override
public Date parseAndAddGap(Date value, String gap) throws java.text.ParseException {
final DateMathParser dmp = new DateMathParser();
dmp.setNow(value);
return dmp.parseMath(gap);
}