public static int processNotification(String queueArn, String remoteAddress) {
int messageCount = 0;
long ts1 = System.currentTimeMillis();
CMBControllerServlet.valueAccumulator.initializeAllCounters();
contextQueues.putIfAbsent(queueArn, new ConcurrentLinkedQueue<AsyncContext>());
ConcurrentLinkedQueue<AsyncContext> contextQueue = contextQueues.get(queueArn);
AsyncContext asyncContext = contextQueue.poll();
if (asyncContext == null) {
logger.debug(
"event=no_pending_receive queue_arn=" + queueArn + " remote_address=" + remoteAddress);
return messageCount;
}
if (asyncContext.getRequest() == null) {
logger.info(
"event=skipping_invalid_context queue_arn="
+ queueArn
+ " remote_address="
+ remoteAddress);
return messageCount;
}
if (!(asyncContext.getRequest() instanceof CQSHttpServletRequest)) {
logger.info(
"event=skipping_invalid_request queue_arn="
+ queueArn
+ " remote_address="
+ remoteAddress);
return messageCount;
}
CQSHttpServletRequest request = (CQSHttpServletRequest) asyncContext.getRequest();
// skip if request is already finished or outdated
if (!request.isActive()
|| System.currentTimeMillis() - request.getRequestReceivedTimestamp()
> request.getWaitTime()) {
logger.info(
"event=skipping_outdated_context queue_arn="
+ queueArn
+ " remote_address="
+ remoteAddress);
return messageCount;
}
logger.debug(
"event=notification_received queue_arn=" + queueArn + " remote_address=" + remoteAddress);
try {
CQSQueue queue = request.getQueue();
List<CQSMessage> messageList =
PersistenceFactory.getCQSMessagePersistence()
.receiveMessage(queue, request.getReceiveAttributes());
if (messageList.size() > 0) {
messageCount = messageList.size();
List<String> receiptHandles = new ArrayList<String>();
for (CQSMessage message : messageList) {
receiptHandles.add(message.getReceiptHandle());
}
request.setReceiptHandles(receiptHandles);
request.setAttribute("lp", "yy"); // found lp call with messages
CQSMonitor.getInstance()
.addNumberOfMessagesReturned(queue.getRelativeUrl(), messageList.size());
String out =
CQSMessagePopulator.getReceiveMessageResponseAfterSerializing(
messageList, request.getFilterAttributes(), request.getFilterMessageAttributes());
Action.writeResponse(out, (HttpServletResponse) asyncContext.getResponse());
long lp_ms = System.currentTimeMillis() - ts1;
request.setAttribute("lp_ms", lp_ms);
String cass_msString =
String.valueOf(
CQSControllerServlet.valueAccumulator.getCounter(AccumulatorName.CassandraTime));
request.setAttribute("cass_ms", cass_msString);
request.setAttribute(
"cass_num_rd",
CQSControllerServlet.valueAccumulator.getCounter(AccumulatorName.CassandraRead));
request.setAttribute(
"cass_num_wr",
CQSControllerServlet.valueAccumulator.getCounter(AccumulatorName.CassandraWrite));
request.setAttribute(
"redis_ms",
CQSControllerServlet.valueAccumulator.getCounter(AccumulatorName.RedisTime));
request.setAttribute(
"io_ms", CQSControllerServlet.valueAccumulator.getCounter(AccumulatorName.IOTime));
asyncContext.complete();
} else {
// if there's longpoll time left, put back on queue
if (request.getWaitTime()
- System.currentTimeMillis()
+ request.getRequestReceivedTimestamp()
> 0) {
logger.info(
"event=no_messages_found_for_longpoll_receive action=re_queueing time_left_ms="
+ (request.getWaitTime()
- System.currentTimeMillis()
+ request.getRequestReceivedTimestamp())
+ " queue_arn="
+ queueArn
+ " remote_address="
+ remoteAddress);
contextQueue.offer(asyncContext);
}
}
} catch (Exception ex) {
logger.error("event=longpoll_queue_error queue_arn=" + queueArn, ex);
} finally {
CMBControllerServlet.valueAccumulator.deleteAllCounters();
}
return messageCount;
}
@Override
public boolean doAction(User user, AsyncContext asyncContext) throws Exception {
CQSHttpServletRequest request = (CQSHttpServletRequest) asyncContext.getRequest();
HttpServletResponse response = (HttpServletResponse) asyncContext.getResponse();
CQSQueue queue = CQSCache.getCachedQueue(user, request);
List<CQSMessage> msgList = new ArrayList<CQSMessage>();
List<String> idList = new ArrayList<String>();
List<CQSBatchResultErrorEntry> invalidBodyIdList = new ArrayList<CQSBatchResultErrorEntry>();
int totalMessageSize = 0;
int index = 1;
String suppliedId =
request.getParameter(this.actionName + CQSConstants.REQUEST_ENTRY + index + ".Id");
String messageBody =
request.getParameter(
this.actionName + CQSConstants.REQUEST_ENTRY + index + "." + CQSConstants.MESSAGE_BODY);
while (suppliedId != null) {
if (!Util.isValidId(suppliedId)) {
throw new CMBException(
CQSErrorCodes.InvalidBatchEntryId,
"Id "
+ suppliedId
+ " is invalid. Only alphanumeric, hyphen, and underscore are allowed. It can be at most "
+ CMBProperties.getInstance().getCQSMaxMessageSuppliedIdLength()
+ " letters long.");
}
if (idList.contains(suppliedId)) {
throw new CMBException(
CQSErrorCodes.BatchEntryIdsNotDistinct, "Id " + suppliedId + " repeated");
}
idList.add(suppliedId);
if (messageBody == null || messageBody.isEmpty()) {
invalidBodyIdList.add(
new CQSBatchResultErrorEntry(
suppliedId,
true,
"EmptyValue",
"No value found for "
+ this.actionName
+ CQSConstants.REQUEST_ENTRY
+ index
+ "."
+ CQSConstants.MESSAGE_BODY));
} else if (!com.comcast.cmb.common.util.Util.isValidUnicode(messageBody)) {
invalidBodyIdList.add(
new CQSBatchResultErrorEntry(
suppliedId,
true,
"InvalidMessageContents",
"Invalid character was found in the message body."));
} else {
HashMap<String, String> attributes = new HashMap<String, String>();
String delaySecondsStr =
request.getParameter(
this.actionName
+ CQSConstants.REQUEST_ENTRY
+ index
+ "."
+ CQSConstants.DELAY_SECONDS);
if (delaySecondsStr != null) {
Integer delaySeconds = 0;
try {
delaySeconds = Integer.parseInt(delaySecondsStr);
} catch (NumberFormatException ex) {
throw new CMBException(
CMBErrorCodes.InvalidParameterValue, "DelaySeconds must be integer value");
}
if (delaySeconds < 0
|| delaySeconds > CMBProperties.getInstance().getCQSMaxMessageDelaySeconds()) {
throw new CMBException(
CMBErrorCodes.InvalidParameterValue,
"DelaySeconds should be from 0 to "
+ CMBProperties.getInstance().getCQSMaxMessageDelaySeconds());
} else {
attributes.put(CQSConstants.DELAY_SECONDS, "" + delaySeconds);
}
}
attributes.put(CQSConstants.SENDER_ID, user.getUserId());
attributes.put(CQSConstants.SENT_TIMESTAMP, "" + Calendar.getInstance().getTimeInMillis());
attributes.put(CQSConstants.APPROXIMATE_RECEIVE_COUNT, "0");
attributes.put(CQSConstants.APPROXIMATE_FIRST_RECEIVE_TIMESTAMP, "");
CQSMessage msg = new CQSMessage(messageBody, attributes);
msg.setSuppliedMessageId(suppliedId);
msgList.add(msg);
}
if (msgList.size() > CMBProperties.getInstance().getCQSMaxMessageCountBatch()) {
throw new CMBException(
CQSErrorCodes.TooManyEntriesInBatchRequest,
"Maximum number of entries per request are "
+ CMBProperties.getInstance().getCQSMaxMessageCountBatch()
+ ". You have sent "
+ msgList.size()
+ ".");
}
totalMessageSize += messageBody == null ? 0 : messageBody.length();
if (totalMessageSize > CMBProperties.getInstance().getCQSMaxMessageSizeBatch()) {
throw new CMBException(
CQSErrorCodes.BatchRequestTooLong,
"Batch requests cannot be longer than "
+ CMBProperties.getInstance().getCQSMaxMessageSizeBatch()
+ " bytes");
}
index++;
suppliedId =
request.getParameter(this.actionName + CQSConstants.REQUEST_ENTRY + index + ".Id");
messageBody =
request.getParameter(
this.actionName
+ CQSConstants.REQUEST_ENTRY
+ index
+ "."
+ CQSConstants.MESSAGE_BODY);
}
if (msgList.size() == 0) {
throw new CMBException(
CMBErrorCodes.InvalidQueryParameter,
"Both user supplied message Id and message body are required");
}
int shard = 0;
if (queue.getNumberOfShards() > 1) {
shard = rand.nextInt(queue.getNumberOfShards());
}
Map<String, String> result =
PersistenceFactory.getCQSMessagePersistence().sendMessageBatch(queue, shard, msgList);
try {
CQSLongPollSender.send(queue.getArn());
} catch (Exception ex) {
logger.warn("event=failed_to_send_longpoll_notification", ex);
}
List<String> receiptHandles = new ArrayList<String>();
for (CQSMessage message : msgList) {
message.setMessageId(result.get(message.getSuppliedMessageId()));
message.setReceiptHandle(result.get(message.getSuppliedMessageId()));
receiptHandles.add(message.getReceiptHandle());
}
request.setReceiptHandles(receiptHandles);
String out = CQSMessagePopulator.getSendMessageBatchResponse(msgList, invalidBodyIdList);
writeResponse(out, response);
CQSMonitor.getInstance().addNumberOfMessagesReceived(queue.getRelativeUrl(), msgList.size());
return true;
}