public long getEntryCount(final String dbName) {
        LmdbDb lmdbDb = databaseMap.get(dbName);
        if (lmdbDb == null) {
            throw new IllegalArgumentException(LogUtil.message("No database with name {} exists", dbName));
        }
        return lmdbDb.getEntryCount();
    }
For use in testing at SMALL scale. Dumps the content of each DB to the logger.
stroom-pipeline/src/main/java/stroom/pipeline/refdata/store/offheapstore/RefDataLmdbEnv.java