I want to have a single canoe configuration which will prompt user to select his/her choice of interest on CAN speed . I have two seperate canoe configurations developed ,one on high speed CAN(500Kbps) and another on CANFD(2000kbps).And each config has its own set of Nodes simulated .Now I don't want have a seperate configs instead want to have one cong which will load respective config's when user selects his/her CAN speed.
Can I integrate these two seperate config's into one so that if I select HS-CAN ,I need to have its simulated nodes being displayed in the simuation setup and if I select CANFD ,I need to have its simulated nodes being displayed in the simuation setup.
Well, depends hon how dirty you want to have it...
If you're not using VN89xx in standalone mode, there is no "standard" way to have a "master" configuration and then load other configs.
However, you can call CANoe from within CANoe, with SysExecCmd canoe32.exe /a /f "config" to launch CANoe und then immediatly exit canoe from within capl. That's dirty but should work (see CANoe and CAPL help for references). Oh, and don't forget to recall the master configuration after the other configuration finished. This has load times, though...
You can also manually integrate both simulations into the same configuration onto separate CAN buses. You then must assure, only one bus can run at the same time. If you have two piggies: fine. Wire them together externally and you're done. If you don't, each time you change bus (via a CAPL script, stopping and starting the respective simulation), the CAN parameters must be reset to the required specification. Then, in the hardware configuration, set both channels to the same transceiver and ignore the popup telling you, that this is a bad idea (works only with CAN).
Worst would be, of course, to implement everything onto the same bus in CANoe and handle it there.
Best case would be: Don't have such requirements or use external tools. Or usesrs that know what they're doing. CANoe is almost fully scriptable via ActiveX, if you want to go down that rabbit hole...
Sorry to say but this is generally one of the things you want to avoid. ;-)
Related
I used zabbix to monitor some Windows server in AWS.
Automatically, the Windows discovery system will create many many items as well as triggers in Zabbix.
I tried to disable all of them, just keep only 2 items. They're
Service "Dhcp" (DHCP Client) is not running (startup type automatic)
Service "MpsSvc" (Windows Firewall) is not running (startup type automatic)
But after a while, there are many items like
Service "OneSyncSvc_xxxxxxx" (Sync Host_xxxxxxx) is not running (startup type automatic delayed)
I disabled them too, and then later some items with ↑ structure came in.
If i disable Windows discovery system, i'm afraid that 2 of the above-mentioned items would not work too.
Is there any ways to handle this?
Most zabbix templates you find are best thought of as examples; what one organization needs to monitor is often quite different from another. This is especially true of low level discovery which is what you are dealing with.
The best approach is to find the template and see how it generates the LLD items. There are many ways this can be done, from scripts to zabbix walks through SNMP items or Agent items. Regardless, each will have a discovery definition (Configure, Templates, Discovery Rule). On the second tab is a "Filters" page. There you can create a logical set of conditions which will allow (or not) discovery.
As a simple example, I have a list of names patterns of interfaces I do not want, e.g. "Unrouted VLAN" or "StackSub". If those names are found, the item is not discovered. If you have several templates that will have similar lists, put the list in a regular expression (Administration, General, Regular Expressions). Be careful of the match sense (include/exclude) and you can test them in the regular expression page (second tab).
In other words, the way you really want to handle it is not to have them discovered at all, as opposed to dealing with them afterwards.
Note that items no longer discovered (e.g. if you start filtering and eliminate some) are removed after the "Keep lost resources period (in days)" on the discovery rule. It is wise when changing the filters to set this to something larger than 0, then review the items for a device to see which are not discovered and being deleted (they appear with a orange exclamation point, if I recall -- some kind of flag and hover over and it explains).
If your needs are more complex than static filters can determine, you can script the discovery itself, and have the logic in the script to decide what is needed and what not, but clearly that is a lot more complex to implement.
I use some xbee (s2) modules with zb stack for mesh networking evaluation. Therefore a multi hopping environment has to be created. The problem is, that the firmware handles the association for themselves and there is no way deeper into the stack as the api provides. To force the path of the data, without to disturb the routing mechanism, I have tried to measure, I had to put them outside their reach. To get only the next hop in association isn't that easy. I used the least power level of the output, but the distance for the test setup is to large and the rf characteristics of the environment change undetermined.
Therefore my question, has anyone experience with this issue?
Regards, Toby
I don't think it's possible through software and coordinator/routers. You could change the Node Join Time (ATNJ) to force a new router to join through a particular router (disable Node Join on all nodes except one), but that would only affect joining. Once joined to the network, the router will discover that other nodes are within range.
You could possibly do it with sleepy end devices. You can use the ATNJ trick to force an end device to join through a single router, and it will always send its messages to that router. But you won't get that many hops -- end device sends to its parent router, which sends to the target's parent router, which sends to the target end device.
You'll likely need to physically limit the range of the radios to force hopping, as demonstrated in the video you linked of Digi's K-Node test equipment with a network of over 1000 radios. They're putting the radios in RF-shielded boxes and using wired antenna connections with software-controlled attenuators to connect the modules to each other.
If you have XBee modules with the U.fl or RPSMA connector, and don't connect an antenna, it should significantly reduce the range of the module. Otherwise, with a wire whip or integrated PCB antenna, you need to put each radio in some sort of box that attenuates the signal. Perhaps someone else can offer advice on materials that will reduce the signal's range without completely blocking it.
ZigBee nodes try to automatically form an Ad-Hoc network. That is why they join the network with the strongest connection (best network coverage) available on that moment. These modules are designed in such a way, that you do not have to care much about establishing a reliable communication. They will solve networking problems most of the time.
What you want to do, is somehow force a different situation. You want to create a specific topology, in order to get some multi-hopping. That will not be the normal behavior of the nods. But you can still get what you want with some of the AT Commands.
The mentioned command "NJ" should work for you. This command locks joins after a certain time (in seconds). Let us think of a simple ZigBee network with three nodes: one Coordinator, one Router and one End-Device. Switch on the Coordinator with "NJ" set to, let us say, two minutes. Then quickly switch on the Router, so it can associate with the Coordinator within these two minutes. After these two minutes, the Coordinator will be locked and will not accept more joins. At that moment you can start the End-Device, which will have to associate with the Router necessarily. This way, you will see that messages between End-Device and Coordinator go through the Router, as you wanted.
You may get a bigger network applying this idea several times, without needing to play with the module's antennas. You can control the AT Parameters remotely (i.e. from a Computer connected to the Coordinator), so you can use some code to help you initialize the network.
How many ways are there to learn implementing workflow of a software? What are them?
If you mean the user workflow, how the user is guided through the software...
I usually use some sort of state machine to limit what functionality can be triggered by the user and what information will be presented to the user in a particular state of the workflow. This way I can concentrate on designing each segment of the flow in its own "sandbox" and decision making becomes a lot easier.
If you do not mean user workflow, you can ignore this reply.
Usually you do have steps in workflow. Step consist of some precondition (business logic hidden from UI), some user interaction (user entering some data, and doing some “user stuff”), and post conditions. Usually user interaction part has one or more user chosen “exists”, and every exit consist it’s own post condition (usually every user exit has it’s own business logic depending of a meaning of an exit from a step). Exits navigate workflow to next step. Sometimes you can have fully automatic steps (i.e. using some external data source, calling some web service, important calculation, and so on).
If your workflow is simple, you may implement it as a set of classes representing each step, and configuration of steps order can be put in XML. When your workflow will grow bigger, and bigger, it may be reasonable to search for some workflow engine, (discussion of WF engines is I think beyond the scope of this question).
One important thing – steps can be orthogonal, but it is harder to design. If your steps rely one on another, person configuring workflow and steps order must be fully aware of such dependencies (e.g: user address step will probably depends on user object creation step, and removing user object creation step from a workflow, will result in trying to access nonexistent object).
I just got a mail saying that I have to change a config value at 2009-09-01 (new taxes). Our normal approach for this would be to to awake at 2009-08-31 at 23:59 and then just change the value manually. Which not is a big problem since this don't happens to often. But it makes me wonder how other people handle issues like this.
So! How do you handle date specific config changes?
(We are working in asp.net but I don't think this has to be language specific)
Br
Carl Bergquist
I'd normally store this kind of data in a database table like this
Key, Value, EffectiveFrom, EffectiveTo
-----------------------------------------
VAT, 15.0, 20081201, 20091231
VAT, 17.5, 20100101, NULL
I'd then use the EffectiveFrom and EffectiveTo dates to chose the value that is effective at the given time. If the rate is open ended then the effecive to could either by NULL or 99991231.
This also allows you to go back without having to change the config. E.g. if someone asks you to recalculate the tax for the previous month before the rate change.
In linux, there is a command "at" for batch execution.
See "man at" for details.
To be honest, waking up near the time and changing it seems to be the simplest and cheapest approach. All of the technical solutions are fine, but it depends where you work.
In our environment it would be cheaper and simpler to get someone to wake up and make the change than to redevelop the functionality of a piece of software that already works. It certainly involves less testing, development overhead and costs which means we would tend to solve the problem as you do, manually.
That depends totally on the situation and the technology.
pjp's idea is good, if you get your config from a database, or as metadata to define the valid time for whole config sets/files.
Another might be: just prepare a new configfile with the new entries and swap them at midnight (probably with a restart of the service/program) whatever.
Swapping them would be possible with at (as given bei Neeraj) ...
If timing is a problem you should handle the change, or at least the timing of the change on the running server (to avoid time out of synch problems).
We got same kind of problem some time before and handled using the following approach.
this is suitable if you are well known to the source that orginates the configuration changes..
In our case, the source exposed a webservice (actualy a third party) which will return a modified config details. And there is a windows service running on our server which keeps on polling the webservice and will update the configuration file if there is any change.
this works perfectly in our case..
You can make use of this approach by changing the polling webservice part to your source of config change (say reading changes from some disk path). But am not sure how this is possible reading config changes from email.
Why not just make a shell script to swap out the files. run it in cron and switch the files out a minute before and send an alert text if NOT successful and an email if successful.
This is an example on a Linux box but I think you get the point and can do this on a Windows box.
Script:
cp /path/to/old/config /path/to/backup/dir/config.timestamp
cp /path/to/new/config
if(/path/to/new/config exsits) {
sendSuccessEmail();
} else {
sendPanicTextAlert();
}
cron:
59 23 31 8 * /path/to/script.sh
you could test this as well before hand just point to some dummy directories and file
I've seen the hybrid approach. Instead of actually changing the data model to include EffectiveDate/EndDate or manually changing the values yourself, schedule a script to change the values automatically. Also, be sure to have a solid test plan that will validate all changes.
However, this type of manual change can have a dramatic impact on reporting. If previous transactions join directly to the tables being changed, numbers in historical reports could change in a very bad way. There really is no "right" answer.
If I'm not able to do something like pjp's solution, I'd use either a scheduled task or a server job to update it automatically at the right time.
But...I'd probably still be awake checking it had worked.
Look the best solution would be to parameterise your config file and add things like when a certain entry should be used from. This would negate the need for any copying or swapping of files and your application would simply deal with it. (That goes for a config file approach or a database)
If you cannot change the current systems and you have to go with swapping the config files, then you also have two options:
Use a scheduled task to kick off a batch job or even a VBScript or PowerShell script (which ever you feel comfortable with) Make sure you set up the correct credentials to be able to do this at the middle of the night and you could also add some checking and mitigation into this approach.
Write a windows Service that does this for you. Here you have all the flexibility you need. Code it to do whatever it needs to do, do all the checks you need to (so that you can keep sleeping rather than making sure it actually worked) etc, etc. You service would then even take care of the scheduling aspect and all will be good. Here you could use xml DOM object and xPath and not replace the file, but simply update the specific entries as required.
Remember that any change to the config file would cause your site to restart, so make sure you take care of all the other housekeeping stuff that this could cause. (Although this would be exactly the same if you where sitting there in the middle of the night copying file around)
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We're doing an "Amazing Race" kind of event, and thought it would be cool to have CDs that could only play once... like a "this message will self destruct in 5 seconds..."
Any thoughts on how to do this? I was thinking it could be a compiled HTML website that would write a cookie and only play once. I don't want to write to the registry (don't want to depend on windows, don't want to install anything, etc).
I also don't care if it's hackable... This is a one-time fun event, and I don't really care too much if people could remove the cookie or something.
Any other ideas?
If the content is HTML and run inside a normal browser window, then a cookie may work but there are caveats:
User runs the CD once when IE is the default browser. User runs at a later time, when Firefox is the default browser so cookie cannot be checked.
The browser's security settings may be locked down to prevent use of script so the cookie cannot be set (more of an IE problem).
An alternative might be Flash's equivalent of cookies, but if script was locked down then the same may be true for Flash.
If you used Flash to create the content, you could then use a wrapper program such as Zinc to produce cross-platform executables of the content.
Then, the Flash could use its version of cookies (local shared objects) to determine when the content has been displayed - write to the LSO the first time and read from it thereafter.
I would say encrypt (part of) the contents of the disc with a unique one time pad, that you request from a server that does a read directly followed by a delete of the decryption key. You could write an identifier on each disk so you can use multiple disks, each with a unique key.
This requires network access and some encryption tools, but a very simple implementation would do what you want it to do, is feasible, and it would be 'unbreakable' unless the one time pad is captured and stored.
If just for fun, this should be secure enough.
You can create a volatile registry entry. It will only exist untill the computer is restarted. This solution is very much "hackable", but it is simple and may suffice for what you want to do.
Take a look at the REG_OPTION_VOLATILE here.
Will the computers this is run on have internet access? You can easily load up a remote url (execute 'start http://yoururl.com' from autorun.inf), store the cookie and prevent it from being loaded again if the cookie exists.
If it's allowed to be hackable, then I'd just go with a simple solution of HTML + JavaScript, requiring (say) a GUID to enter, with some silly obfuscation in the code to validate the GUID.
What I mean by silly obfuscated validation is something like putting together a big array of ROT13'ed GUIDs, then adding code to only accept the Math.floor(PI * E + 32/(new DateTime()).getYear())'th GUID in the array, and ROT13 it again using sufficiently uncommented/unclear code, then check the user input against the result. Do it all in one line for kicks, or generate the GUIDs in some pseudo-random manner using a known seed... you get the idea :).
The only snag might be if IE doesn't allow local JavaScript? Hmm, looks like they'd need to deal with the InfoBar thing :(.
You could also set a registry key that would prevent playing, though this could be bypassed.
I think your best bet is to use Rewritable media for this. You can create your application easily, like HTML site or something like that, and after the last link or last page, however you decide to do you could execute a script with some command-line burner that would erase the rewritable media, or even write an ISO that you keep in CD with a text file or a flash that explains that the CD is lost forever.
Give a look at some Command Line Burners. Linux have several, that isn't worth to mention here, for windows you can use Cheetah CommandLine Burner among several others.
If you wish to do a CD without depending on the installed OS you should give a look at LIVE CDs. FreeDOS is a choice for "DOS Compatible applications" or my suggestioon you use a Linux live CD.
Also you will have several options for small HTTP servers, like lighthttpd and even browsers in several flavors from text interfaces to the graphical ones.
Good luck on the race :D. Great idea BTW!
Make a Java Swing application. That will not require Internet and it runs on Mac, Windows, and Linux. You can write to the file system for the lock. System.getProperty("user.home") gives you the home equivalent for the platform. You might have to include a jre in your CD.
Not quite what you're looking for, but you could put in on re-writable media and have an executable over-write itself (or part of itself).
I don't know if a CD-RW could do that automatically, or if you would have to look at cheap USB sticks.