/** {@inheritDoc} */
@Override
protected final void handleMessages(List<T> messages) {
long start = System.nanoTime();
// Create a batch of message that we want to write.
List<RegularStatement> statements = new ArrayList<>();
for (T t : messages) {
try {
handleMessage(statements, t);
} catch (RuntimeException e) {
LOG.warn("Failed to write message: " + t, e); // Just in case we cannot process a message
}
}
// Try writing the batch
try {
Batch batch = QueryBuilder.batch(statements.toArray(new RegularStatement[statements.size()]));
long beforeSend = System.nanoTime();
ResultSetFuture f = connection.getSession().executeAsync(batch);
f.getUninterruptibly(); // throws QueryValidationExecption etc
long total = System.nanoTime();
// Is this an abnormal slow batch?
boolean isSlow =
TimeUnit.MILLISECONDS.convert(total - start, TimeUnit.NANOSECONDS) > 200
|| messages.size() >= getBatchSize();
if (isSlow || lastSlowBatch > 0) {
LOG.info(
"Total time: "
+ DurationFormatter.DEFAULT.formatNanos(total - start)
+ ", prepping="
+ DurationFormatter.DEFAULT.formatNanos(beforeSend - start)
+ ", sending="
+ DurationFormatter.DEFAULT.formatNanos(total - beforeSend)
+ ", size="
+ messages.size());
// makes sure we write 10 info statements after the last slow batch we insert
lastSlowBatch = isSlow ? 10 : lastSlowBatch - 1;
}
persistedCount.mark(messages.size());
// sink.onSucces(messages);
} catch (QueryValidationException e) {
LOG.error("Could not execute query, this is an internal error", e);
} catch (Exception e) {
onFailure(messages, e);
try {
sleepUntilShutdown(2, TimeUnit.SECONDS);
} catch (InterruptedException ignore) {
Thread.interrupted();
}
}
}
/*
* (non-Javadoc)
*
* @see dal.SchoolDAL#list()
*/
@Override
public List<School> list() {
final ResultSetFuture schoolListFuture =
listAllInTable(School.class.getSimpleName().toLowerCase());
final List<Row> schoolRowList = schoolListFuture.getUninterruptibly().all();
final List<School> schoolList = new ArrayList<>();
School school;
for (Row row : schoolRowList) {
school = createSchoolForRow(row);
schoolList.add(school);
}
return schoolList;
}
/*
* (non-Javadoc)
*
* @see dal.SchoolDAL#getById(java.lang.String)
*/
@Override
public School getById(String id) {
final PreparedStatement statement = session.prepare("SELECT * FROM school WHERE school_id = ?");
final BoundStatement boundedStatement = statement.bind(id);
final ResultSetFuture schoolFuture = session.executeAsync(boundedStatement);
final Row schoolRow = schoolFuture.getUninterruptibly().one();
School school;
if (schoolRow != null) {
school = createSchoolForRow(schoolRow);
} else {
school = null;
}
return school;
}
@Override
public void onQueryComplete(ResultSetFuture rsf) {
log.info("QueryCompleted");
Row row;
try {
row = rsf.get().one();
} catch (Exception e) {
throw new RuntimeException("Failed to get ResultSet from ResultSetFuture", e);
}
book = new Book();
book.setIsbn(row.getString("isbn"));
book.setTitle(row.getString("title"));
book.setAuthor(row.getString("author"));
book.setPages(row.getInt("pages"));
done = true;
log.info("DONE");
}
@Override
public void cancel() {
rsf.cancel(true);
}
