stomp | Go language library for STOMP protocol
kandi X-RAY | stomp Summary
kandi X-RAY | stomp Summary
Go language implementation of a STOMP client library.
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Top functions reviewed by kandi - BETA
- processLoop reads frames from the connection and sends them to the connection .
- Connect opens a connection to a net . Conn
- determineVersion returns the protocol version of the given frame .
- newConnOptions returns ConnOptions struct .
- Send sends a frame to the remote peer .
- Get the heart - beat header from the frame
- connected handles the given frame .
- createSendFrame creates a SEND frame .
- Convenience function for creating a new subscription .
- ParseHeartBeat is the same as ParseHeartbeat but accepts a string as input .
stomp Key Features
stomp Examples and Code Snippets
Community Discussions
Trending Discussions on stomp
QUESTION
I am trying to create a table (150 rows, 165 columns) in which :
- Each row is the name of a Pokemon (original Pokemon, 150)
- Each column is the name of an "attack" that any of these Pokemon can learn (first generation)
- Each element is either "1" or "0", indicating if that Pokemon can learn that "attack" (e.g. 1 = yes, 0 = no)
I was able to manually create this table in R:
Here are all the names:
...ANSWER
Answered 2022-Apr-04 at 22:59Here is the a solution taking the list of url to webpages of interest, collecting the moves from each table and creating a dataframe with the "1s".
Then combining the individual tables into the final answer
QUESTION
My ActiveMQ messaging instance (ActiveMQ 5.16.2 on Amazon MQ) uses STOMP. I cannot use the JMS QueueBrowser, and there is no way to "unack" a message. As soon as there is a consumer that pulled that message from the queue i.e. marked as "unconsumed" as stated in the docs here.
Assuming the broker cannot be changed, I was looking at the REST API mapping of JMS here, but I do not see any endpoint that mimic the ActiveMQ admin pages (JSP), that is capable to browse the queue, consumers and message content without actively "pulling" those messages from the queue.
So, how to implement that JMS logic we can see in the ActiveMQ admin pages programmatically (e.g. via REST apis)?
Looking at the docs of REST API, assumed having the logon, this approach works
...ANSWER
Answered 2022-Mar-07 at 17:15The REST/JMS mapping doesn't offer any message browsing functionality.
However, it's worth noting that the REST/JMS mapping is independent of the management functionality exposed by Jolokia. Jolokia is an HTTP-JMX bridge so anything exposed via JMX can be accessed via HTTP (e.g. using curl). The DestinationViewMBean has various "browse" methods you can use, e.g.:
QUESTION
I have a Node.js app in which I use stomp-client to connect and subscribe to an ActiveMQ topic without websockets. My code is the same as this example: https://www.npmjs.com/package/stomp-client#super-basic-example.
Now, I want to do the same thing, but with a Vue.js application. So, I want to subscribe to an ActiveMQ topic in the browser (i.e., in JavaScript, not in Node.js). My ActiveMQ is not configured to support websockets. Is it possible to do this in a browser without websockets?
...ANSWER
Answered 2022-Feb-02 at 19:34No, this is a security constraint that is part of web standards.
QUESTION
I am new to react and making a little app to learn the library and way of thinking.
But I ran into a problem which has me completely stomped...
I have the root components that contains a list of tasks.
I pass these tasks to a custom component to render them into a groups like so:
Where this.state.tasks is an array containing all the current tasks.
But the problem is that my TaskView component never seems to receive these tasks...
See below for the complete code:
ROOT:
...ANSWER
Answered 2022-Jan-17 at 22:55The constructor is only run once when your component is first mounted, because React re-uses the same class instance for the lifetime of the component (see these docs). This is why you're not seeing your logging calls after they are initially run once.
For logging that runs on each render, you could move your console.logs into componentDidUpdate.
QUESTION
I am trying to write a simple plugin system for an application and would like to prevent plugins from stomping on each others symbols, however RTLD_DEEPBIND and RTLD_LOCAL don't seem to be enough when it comes to static class members when they happen to have the same name in different plugins.
I wrote a stripped down example to show what I mean. I compiled and ran it like this:
...ANSWER
Answered 2022-Jan-11 at 22:11gcc implements static inline data members (and also static data members of class templates, inline or not, and static variables in inline functions, and perhaps other things as well) as global unique symbols (a GNU extension to the ELF format). There is only one such symbol with a given name per process, by design.
clang implements such things as normal weak symbols. These will not collide when RTLD_LOCAL and RTLD_DEEPBIND are used.
There are several ways to avoid collisions, but all of them require plugin writers to take an action. The best way IMO is to use hidden symbol visibility by default, only opening symbols that are meant to be dlsymd.
QUESTION
I'm using JMS on a Spring boot client to connect to an ActiveMQ Artemis broker over SSL. The client is able to connect regardless of the validity of the certificates in the truststore and even if invalid credentials are used. How do I ensure that the broker is filtering clients out based on the configured parameters?
The acceptors in the broker.xml are defined as show below. The SSL acceptor uses port 61617.
ANSWER
Answered 2021-Oct-14 at 14:36Here's what got things working.
Firstly, the login.config file on Artemis has a GuestLoginModule that this link says is chained to the PropertiesLoginModule and the guest module allows clients without credentials, or even invalid credentials to connect to the broker. Now, by default, the GuestLoginModule looks like this
QUESTION
Hello I'm trying to use stomp in angular. once i use it in my project I lost my whole project , I get white page nothing is working.
...ANSWER
Answered 2021-Sep-10 at 20:53This possible duplicate of this.
The global object is not available. Possible solution to change it to window object.
QUESTION
connectWebSocket() {
const socket = new SockJS('http://localhost:8080/websocket');
this.stompClient = Stomp.over(socket);
const _this = this;
this.stompClient.connect({ "Authorization" : "Bearer "+localStorage.getItem("Authorization")}, function (frame) {
_this.stompClient.subscribe('/user/queue/notification',function (message) {
const body = JSON.parse(message.body);
console.log(body)
});
});
}
ANSWER
Answered 2021-Jul-27 at 07:09The problem is that when using this.notificationWS.bind(this) the function is executed and it's return value is passed to connectWebSocket. To access the pointer to your function try this:
QUESTION
Currently I am using stomp protocol to send messages to activeMQ and to listen to messages. This is done in Nodejs using stompit library.
When the application is having high CPU or Memory usage, it stops sending heartbeat to broker. So the broker redelivers the message which is currently being processed, leading to repetitive processing of the same message
On disabling heartbeat, the application seems to work fine but I am unsure of the further issues disabling heartbeat might cause. Even when the broker is stopped while sending messages, behaviour seems to be same with or without heartbeat
I have read that it is an optional parameter but I am unable to find out it's exact use cases
Can anyone mention scenarios where no heart beat can cause issues to the application?
...ANSWER
Answered 2021-Jun-03 at 15:07Regarding the purpose of heart-beating the STOMP 1.2 specification just says:
Heart-beating can optionally be used to test the healthiness of the underlying TCP connection and to make sure that the remote end is alive and kicking.
Heart-beats potentially flow both from the client to the server and from the server to the client so the "remote end" referenced in the spec here could be the client or the server.
For the server, heart-beating is useful to ensure that server-side resources are cleaned up in a timely manner to avoid excessive strain. Server-side resources are maintained for all client connections and it helps the broker to be able to detect quickly when those connections fail (i.e. heart-beats aren't received) so it can clean up those resources. If heart-beating is disabled then it's possible that a dead connection would not be detected and the server would have to maintain its resources for that dead connection in vain.
For a client, heart-beating is useful to avoid message loss when performing asynchronous sends. Messages are often sent asynchronously by clients (i.e. fire and forget). If there was no mechanism to detect connection loss the client could continue sending messages async on a dead connection. Those messages would be lost since they would never reach the broker. Heart-beating mitigates this situation.
QUESTION
I have a cluster of Artemis in Kubernetes with 3 group of master/slave:
...ANSWER
Answered 2021-Jun-02 at 01:56I've taken your simplified configured with just 2 nodes using a non-wildcard queue with redistribution-delay of 0, and I reproduced the behavior you're seeing on my local machine (i.e. without Kubernetes). I believe I see why the behavior is such, but in order to understand the current behavior you first must understand how redistribution works in the first place.
In a cluster every time a consumer is created the node on which the consumer is created notifies every other node in the cluster about the consumer. If other nodes in the cluster have messages in their corresponding queue but don't have any consumers then those other nodes redistribute their messages to the node with the consumer (assuming the message-load-balancing is ON_DEMAND and the redistribution-delay is >= 0).
In your case however, the node with the messages is actually down when the consumer is created on the other node so it never actually receives the notification about the consumer. Therefore, once that node restarts it doesn't know about the other consumer and does not redistribute its messages.
I see you've opened ARTEMIS-3321 to enhance the broker to deal with this situation. However, that will take time to develop and release (assuming the change is approved). My recommendation to you in the mean-time would be to configure your client reconnection which is discussed in the documentation, e.g.:
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