@Override
    protected String doBuildColumnString(String dm) {
        StringBuilder sb = new StringBuilder();
        sb.append(dm).append(boostExpr);
        sb.append(dm).append(createdBy);
        sb.append(dm).append(createdTime);
        sb.append(dm).append(sortOrder);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        sb.append(dm).append(urlExpr);
        if (sb.length() > dm.length()) {

    @Override
    protected String doBuildColumnString(String dm) {
        StringBuilder sb = new StringBuilder();
        sb.append(dm).append(createdBy);
        sb.append(dm).append(createdTime);
        sb.append(dm).append(name);
        sb.append(dm).append(sortOrder);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        sb.append(dm).append(value);
        if (sb.length() > dm.length()) {

    @Override
    protected String doBuildColumnString(String dm) {
        StringBuilder sb = new StringBuilder();
        sb.append(dm).append(endTime);
        sb.append(dm).append(jobName);
        sb.append(dm).append(jobStatus);
        sb.append(dm).append(lastUpdated);
        sb.append(dm).append(scriptData);
        sb.append(dm).append(scriptResult);
        sb.append(dm).append(scriptType);
        sb.append(dm).append(startTime);

    protected String doBuildColumnString(String dm) {
        StringBuilder sb = new StringBuilder();
        sb.append(dm).append(boost);
        sb.append(dm).append(createdBy);
        sb.append(dm).append(createdTime);
        sb.append(dm).append(maxSize);
        sb.append(dm).append(query);
        sb.append(dm).append(term);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);

    @Override
    protected String doBuildColumnString(String dm) {
        StringBuilder sb = new StringBuilder();
        sb.append(dm).append(createdTime);
        sb.append(dm).append(expiredTime);
        sb.append(dm).append(name);
        sb.append(dm).append(sessionId);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");

        sb.append(dm).append(excludedUrls);
        sb.append(dm).append(includedDocUrls);
        sb.append(dm).append(includedUrls);
        sb.append(dm).append(intervalTime);
        sb.append(dm).append(maxAccessCount);
        sb.append(dm).append(name);
        sb.append(dm).append(numOfThread);
        sb.append(dm).append(permissions);
        sb.append(dm).append(sortOrder);
        sb.append(dm).append(timeToLive);

        sb.append(dm).append(queryTime);
        sb.append(dm).append(referer);
        sb.append(dm).append(requestedAt);
        sb.append(dm).append(responseTime);
        sb.append(dm).append(roles);
        sb.append(dm).append(searchWord);
        sb.append(dm).append(user);
        sb.append(dm).append(userAgent);
        sb.append(dm).append(userInfoId);
        sb.append(dm).append(userSessionId);

    @Override
    protected String doBuildColumnString(String dm) {
        StringBuilder sb = new StringBuilder();
        sb.append(dm).append(createdAt);
        sb.append(dm).append(docId);
        sb.append(dm).append(queryId);
        sb.append(dm).append(url);
        sb.append(dm).append(userInfoId);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");

    @Override
    protected String doBuildColumnString(String dm) {
        StringBuilder sb = new StringBuilder();
        sb.append(dm).append(available);
        sb.append(dm).append(boost);
        sb.append(dm).append(createdBy);
        sb.append(dm).append(createdTime);
        sb.append(dm).append(description);
        sb.append(dm).append(handlerName);
        sb.append(dm).append(handlerParameter);

	dm.Unlock(context.Background())

	dm.Lock(id, source)
	time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
	dm.Unlock(context.Background())

	dm.Lock(id, source)
	time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
	dm.Unlock(context.Background())

	dm.Lock(id, source)
	time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
	dm.Unlock(context.Background())

	dm.Lock(id, source)