message-queue

问题 Given: I load a queue of messages at page load. With jGrowl, how can I display each message, one message at a time, in a drip-like fashion? 回答1: I needed to do this for a project, a few months ago. If you use the pooling feature, available in the latest jGrowl (1.2.0 as of this writing), you can simply write: $.jGrowl.defaults.pool = 1; That way, you can load all of them at the same time, jGrowl will take care of only showing one at a time. When a message closes, jGrowl will automatically

问题 I am in the process of developing a Windows Visual C++ application which will monitor the message pump for various events. Here is a skeleton of my main cpp file: LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); int WINAPI WinMain (HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nCmdShow) { HWND hwnd; WNDCLASSEX wincl; // register WindowProcedure() as message callback function wincl.lpfnWndProc = WindowProcedure; // assign other properties... if (

问题 i got this error when i try to connect using php-amqp: Fatal error: Class 'AMQPConnection' not found in $credentials =array('host' => 'localhost','port' => 5672); $cnn = new AMQPConnection($credentials); $cnn->connect(); 回答1: It looks like you don't have the AMQP PECL extension installed. That PECL extension is not a default part of PHP, so you'll need to compile and install it using the pecl tool. 来源： https://stackoverflow.com/questions/5424419/rabbitmq-error-when-connect

问题 I have a storm topology to process messages from Kafka and make HTTP call / saves in Cassandra based on the task in hand. I process the messages as soon as they come. How ever few messages are not processed completely due to the response form external sources such as an HTTP. I would like to implement a exponential backoff mechanism for retrial in-case HTTP server does not respond/returns an error message to retry after some time. I could think of few ideas using which I could achieve them. I

问题 I am refactoring an Analytic system that will do a lot of calculation, and I need some ideas on possible architectural designs to a data consistency issue I am facing. Current Architecture I have a queue based system, in which different requesting applications create messages that are eventually consumed by workers. Each " Requesting App " breaks down a large calculation into smaller pieces that will be sent to the queue and processed by the workers . When all the pieces are finished, the

问题 Is there a way to find out the message queue size and what item is in each message? Is it Looper.getMainLoop or something? 回答1: Hope it's not too late for an answer. You can access the current thread's message queue calling Looper.myQueue() on it. However, the MessageQueue class has no methods to find out its size or what item is in each message. For that purpose, you could try the Handler class. A handler manages a looper, which has a queue, and that handler has methods like hasMessages,

问题 One EventHandler (DatabaseConsumer) of the Disruptor calls stored procedures in database, which is so slow that it blocks the Disruptor for some time. Since I need the Disruptor keep running without blocking. I am thinking adding an extra queue so that EventHandler could serve as Producer and another new-created thread could serve as Consumer to handle database's work, which could be asynchronous without affecting the Disruptor Here is some constrain: The object that Disruptor passed to the

问题 My project is looking at Apache Kafka as a potential replacement for an aging JMS-based messaging approach. In order to make this transition as smooth as possible, it would be ideal if the replacement queuing system (Kafka) had an asynchronous subscription mechanism, similar to our current project's JMS mechanism of using MessageListener and MessageConsumer to subscribe to topics and receive asynchronous notifications. I don't care so much if Kafka doesn't strictly conform to the JMS API, but

问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 6 years ago . I am sending a message to a pretty standard message queue that I have created on my machine running Windows Server 2008 R2. QueueName: directionsTest

问题 I have tested activeMQ JMSProducer in some operating systems. The results are as follows: AIX - Persistent - around 50 messages per second Solaris - Persistent - around 60 messages per second Linux - Persistent - around 500 messages per second Is that normal behaviour because in Linux, it is much much faster? ActiveMQ Performance document is only based on Linux. And, does Slow KahaDB access slow down activeMQ performance? Thanks. 回答1: With persisted connections you are highly dependant on the