I am using ISO8583 Sampler in JMeter for Sending ISO Messages, I need to append the length in in hex of the total message divide by 2 at the beginning. I have read the documentation and i cannot find anything.
Git: https://github.com/tilln/jmeter-iso8583
Question is, why do you need to manually perform that?
I believe you just need to select the proper channel in the connection configuration.
Depending on what you mean by "in hex" maybe HEXChannel which sends four ASCII bytes with the hex character or NACChannel which will send 2 bytes with the length, some people incorrectly call that hex when they are actually just 2 raw bytes.
Take a look at JSR223 PreProcessor, if you add it as a child of the ISO8583 Sampler you will be able to access the underlying class functions using sampler shorthand, in your case it will be ISO8583Sampler, take a look at available methods, i.e. getRequest() will give you an instance of ISOMsg and you can get/set the neccessary header/fields/whatever.
Related
Good afternoon.
I have implemented websockets in my project using the plugin "WebSocket Samplers by Peter Doornbosch" in Jmeter.
So far the requirements were simply to send and receive some payload, or simply send and forget.
However I got a new requirement where the server will constantly send back websocket message to client at every 5 second interval.
Ex: I send ABC , XYZ, ABD at every 3 second interval and I need to read XYC, YTZ at every 5 second interval both should happen simultaneously
I'm unable to use Parallel Controller as each item within the controller is a separate thread and thus I will loose web socket connection for the second one.
Is there any way I can achieve this using some listeners or something.
Thanks for your response in advance
As per documentation:
Fragmentation
WebSocket messages may be fragmented into several frames. In such cases the first frame is an ordinary text or binary frame, but it will have the final bit cleared. The succeeding frames will be continuation frames (whether they are text or binary is inferred by the first frame) and the last continuation frame will have the final bit set. The plugin supports continuation frames, but as the plugin is frame-oriented, you'll have to read them yourself. In cases where the number of fragments is known beforehand, this is as easy as adding an extra WebSocketReadSampler for each continuation frame you expect. If the number of continuation frames is not known, you need to create a loop to read all the continuation frames. For this purpose, the plugin provides a new JMeter variable called websocket.last_frame_final that indicates whether the last frame read was final. This enables you to write a simple loop with a standard JMeter While Controller; use the expression ${__javaScript(! ${websocket.last_frame_final},)} as condition. With a JMeter If Controller, the condition can be simplified to ! ${websocket.last_frame_final} because that controller automatically interprets the condition as JavaScript. See the sample Read continuation frames.jmx test plan for examples of using the While or the If controller to read continuation frames.
If you are unsure whether continuation frames are sent by your server or how much, switch on debug logging: samplers reading a frame will log whether the received frame is a "normal" single frame, a non-final frame (i.e. 1st fragment), a continuation frame or a final continuation frame (last fragment).
I am new to jmeter. I am trying to setup JMS point-to-point load test script. The request message is a fixed-length format. I need a way to read fields from csv and arrange them in fixed-length format. I tried using javascript slice function by using csv data config variables and slicing to required length, concating them all in one line. But it is not working. May be my approach is wrong. Any pointers on how to make it work with fixed length format will help.
This is what I tried:
${__javascript((" ".slice(-6))+(("0000000000000000"+${Var2}).slice(-16)) + ((" " + ${Var3}).slice(-19))+((" "+${Var4}).slice(-3))}
where Var1,Var2..Var4 are from csv.
Jmeter version:3.3
MQ: IBM Websphere MQ
With a single input message I am able to execute the test. I need to dynamically populate values from csv and/or date/time functions and arrange them in fixed-length format.
You have a typo in your code, the function should be __javaScript (mind the capital S
Your approach should work, however using JavaScript is extremely inefficient as each time you call __javaScript() function JMeter invokes Rhino or Nashorn interpreter and this may ruin your test in case of high loads. Since JMeter 3.1 users are encouraged to use __groovy() function for scripting.
And last but not the least, in order to get the most performance I would recommend using __substring() function instead of your slice() function. You can install __substring() and other Custom JMeter Functions using JMeter Plugins Manager
I have TCP server which will be sending dynamic responses i.e. approve or decline or hold. Now I am trying to load test it using jmeters TCP sampler. In this case how can I give dynamic EOL byte value in TCP sampler. If response is approve or decline it should be byte value of character e and if the response is hold it should be the byte value of d. How can i give dynamic EOL byte value.
If this is really what you're looking for you can define EOL byte value in form of a JMeter Variable like ${EOL} and amend this variable value according to your test scenario.
However I strongly doubt that TCP server you're testing changes EOL byte value depending on the request status, I would rather expect that it provides different response which you can verify using Response Assertion
Also be aware that you can amend response status via tcp.status.prefix and tcp.status.suffix JMeter properties so you can use them in order to amend Response Code so you will be able to see how many requests had response code e and how many had d once your test finishes.
I am trying to write simple string message into a queue. The MaxMsgLength property of queue is set as 4 kb. The message has 2700 characters and when I try to put into queue I am getting 2030 (07EE) (RC2030): MQRC_MSG_TOO_BIG_FOR_Q exception. I am not doing any special kind of encoding and hence whatever is default for Windows should be used.
I want to know how to determine the value that I should give in MaxMsgLength property. How to calculate that.
Please remember that the MaxMsgLength as specified in the queue definition includes not just the payload, but also the message header and any properties that you set. If you check the Infocenter MQ_* (String Lengths) page and look for MQ_MSG_HEADER_LENGTH you will see that the MQMD alone is 4000 bytes. So if you set the MaxMsgLength of the queue to 4k, the largest payload you can have is 96 bytes. If the queue in question is a transmission queue, you need the queue size plus the size of the MQXQH transmission queue header.
To specifically answer the question in the title of the post, you can find the MaxMsgLength in two ways. Visually, by displaying the queue attributes. Programmatically, add "Inquire" to the open options when opening the queue and use the MQInq API call. Then add the total of the MQMD, any properties that you add (including the XML structures that contain them but are not returned in the API calls that manipulate them) plus any headers such as RFH2 (if the queues are set to use that instead of native properties), MQXQH, MQDLQ, etc.
Not sure what language you are using in your application. Assuming it is C, check BufferLength parameter value you have specified on the MQPUT call.
This IBM MQ InfoCenter link explains the case where you can run into 2030 error and possible remedies.
I am sending and receiving JSON data through a TCP socket. It works fine when it is smaller amounts of data, like 200 bytes or so. But when it gets to about 10 KB it only receives part of the data. I have tried all the different TCP socket retrieve data commands I can find (read, gets, gets.chomp, recv) but I cannot find one that will work for all of my tests.
Here is the code I have now:
socket = TCPSocket.new '10.11.50.xx', 13338
response = socket.recv(1000000000)
I have also tried adding a timeout but I could not get it to work:
socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_RCVTIMEO, 1)
I am not sure what I am missing. Any help would be appreciated.
It's badly documented in the Ruby docs, but I think TCPSocket#recv actually just calls the recv system call. That one (see man 2 recv) reads a number of bytes from the stream that is determined by the kernel, though never more than the application specifies. To receive a larger "message", you will need to call it in a loop.
But there is an easier way: because TCPSocket indirectly inherits from the IO class, you get all of its methods for free, including IO#read which does read as many bytes as you specify (if possible).
You wil also need to implement a way to delimit your messages:
use fixed-length messages
send the length of the message up front in a (fixed-size) header
use some kind of terminator, e.g. a NULL byte