/**
* Return the shard for this timestamp
*
* @param message
* @return
*/
private String getShardKey(long messageTime, int modShard) {
long timePartition;
if (metadata.getPartitionDuration() != null)
timePartition =
(messageTime / metadata.getPartitionDuration()) % metadata.getPartitionCount();
else timePartition = 0;
return getName() + ":" + timePartition + ":" + modShard;
}
String fillMessageMutation(MutationBatch mb, Message message) throws MessageQueueException {
// Get the execution time from the message or set to current time so it runs immediately
long curTimeMicros;
if (!message.hasTrigger()) {
curTimeMicros =
TimeUnit.MICROSECONDS.convert(System.currentTimeMillis(), TimeUnit.MILLISECONDS);
} else {
curTimeMicros =
TimeUnit.MICROSECONDS.convert(
message.getTrigger().getTriggerTime(), TimeUnit.MILLISECONDS);
}
curTimeMicros += (counter.incrementAndGet() % 1000);
// Update the message for the new token
message.setToken(TimeUUIDUtils.getMicrosTimeUUID(curTimeMicros));
// Set up the queue entry
MessageQueueEntry entry =
MessageQueueEntry.newMessageEntry(
message.getPriority(), message.getToken(), MessageQueueEntryState.Waiting);
// Convert the message object to JSON
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
mapper.writeValue(baos, message);
baos.flush();
} catch (Exception e) {
throw new MessageQueueException("Failed to serialize message data: " + message, e);
}
// Write the queue entry
String shardKey = getShardKey(message);
mb.withRow(queueColumnFamily, shardKey)
.putColumn(entry, new String(baos.toByteArray()), metadata.getRetentionTimeout());
// Write the lookup from queue key to queue entry
if (message.hasKey()) {
mb.withRow(keyIndexColumnFamily, getCompositeKey(getName(), message.getKey()))
.putEmptyColumn(
MessageMetadataEntry.newMessageId(getCompositeKey(shardKey, entry.getMessageId())),
metadata.getRetentionTimeout());
}
// Allow hook processing
for (MessageQueueHooks hook : hooks) {
hook.beforeSendMessage(message, mb);
}
// Update state and retun the token
stats.incSendMessageCount();
return getCompositeKey(shardKey, entry.getMessageId());
}
@Override
public Map<String, Integer> getShardCounts() throws MessageQueueException {
try {
List<String> keys = Lists.newArrayList();
for (int i = 0; i < metadata.getPartitionCount(); i++) {
for (int j = 0; j < metadata.getShardCount(); j++) {
keys.add(getName() + ":" + i + ":" + j);
}
}
Map<String, Integer> result = Maps.newTreeMap();
result.putAll(
keyspace
.prepareQuery(queueColumnFamily)
.getKeySlice(keys)
.getColumnCounts()
.execute()
.getResult());
return result;
} catch (ConnectionException e) {
throw new MessageQueueException("Failed to get counts", e);
}
}
@Override
public String getName() {
return metadata.getQueueName();
}
public Builder() {
metadata.setQueueName(queueName);
}
