http://imagej.273.s1.nabble.com/Is-it-possible-to-send-a-command-to-a-running-copy-of-ImageJ-via-a-socket-tp5024089p5024111.html
When the UI freezes up, the automatically launched red phone enables the user via sockets to e.g. trigger a save command, or flush the cache, etc.
> On Oct 23, 2020, at 7:23 PM, Curtis Rueden <
[hidden email]> wrote:
>
> Hi Michael,
>
>> Is it possible to send a command to a running copy of ImageJ via a socket?
>
> You could take a look at the ImageJ Server:
>
https://github.com/imagej/imagej-server>
> It's a REST API.
>
> Regards,
> Curtis
>
> --
> Curtis Rueden
> Software architect, LOCI/Eliceiri lab -
https://loci.wisc.edu/software> ImageJ2 lead, Fiji maintainer -
https://imagej.net/User:Rueden> Have you tried the Image.sc Forum?
https://forum.image.sc/>
>> On Fri, Oct 23, 2020 at 6:21 AM Michael Ellis <
[hidden email]>
>> wrote:
>>
>> Hi and thanks for your reply.
>>
>> The problem with his approach for my use case is that I wish to open
>> images in ImageJ from another Java application. I could use a
>> java.lang.Runtime.exec(String command) but this would be messy
>> necessitating different OS-specific command strings to constructed for each
>> platform.
>>
>> Since ImageJ already can interpret various scripting languages (its own
>> macro scripts and also javascript), it seems a shame that there is not just
>> a socket one can send a piece of javascript or macro scripting language to
>> drive ImageJ remotely.
>>
>> A nice benefit is that an ImageJ could take a command-line argument to
>> determine whether the sockets accepted requests for local and or remote
>> access thus making it possible to drive ImageJ remotely from a different
>> computer.
>>
>> I might consider implementing this as a plugin if this functionality does
>> not already exist. I have used this approach elsewhere. I just dod not want
>> to start reinventing the wheel if ImageJ already had this.
>>
>> -- Michael Ellis
>>
>>
>>
>>
>> October 23, 2020 1:30 PM, "Stein Rørvik" <
[hidden email]> wrote:
>>
>>> Can't you just open ImageJ via the OS, with the multiple instance
>> listener active?
>>> Then subsequent commands will use the same instance.
>>> You can use of the -port option to pass the command to one of several
>> instances.
>>>
>>> The following works as expected in a Windows command batch file:
>>>
>>> start ImageJ.exe -eval "eval('script',
>> 'IJ.getInstance().setTitle(\"ImageJ default\")');"
>>> start ImageJ.exe -port1 -eval "eval('script',
>> 'IJ.getInstance().setTitle(\"ImageJ at port 1\")');"
>>> start ImageJ.exe -port2 -eval "eval('script',
>> 'IJ.getInstance().setTitle(\"ImageJ at port 2\")');"
>>> timeout 10
>>> start ImageJ.exe -eval "print('hello from ImageJ at the default port')"
>>> start ImageJ.exe -port1 -eval "print('hello from ImageJ at port 1')"
>>> start ImageJ.exe -port2 -eval "print('hello from ImageJ at port 2')"
>>> timeout 3
>>> start ImageJ.exe -eval "print('another hello from ImageJ the default
>> port')"
>>> start ImageJ.exe -port1 -eval "print('another hello from ImageJ at port
>> 1')"
>>> start ImageJ.exe -port2 -eval "print('another hello from ImageJ at port
>> 2')"
>>>
>>> Here we have three instances running; I start each instance with a small
>> JavaScript to rename the
>>> main window in order to easier tell the difference between them. Then we
>> can pass commands,
>>> specifying which instance we want each of the commands to execute in.
>> The "timeout 10" command
>>> inserts a 10 seconds delay to give sufficient time for all three
>> instances of ImageJ to launch,
>>> before we start passing commands to each of them. Opening an image or
>> running a macro in each
>>> instance will work the same way.
>>>
>>> I use the "start" command to launch ImageJ asynchronously, or else the
>> Windows script would wait
>>> until each instance of ImageJ has quit. Since this runs asynchronously,
>> we need to add an
>>> appropriate delay between subsequent commands to the same instance, to
>> allow whatever command you
>>> passed to it to finish; in this case 3 seconds.
>>>
>>> Stein
>>>
>>> -----Original Message-----
>>> From: ImageJ Interest Group <
[hidden email]> On Behalf Of Michael
>> Ellis
>>> Sent: 19. oktober 2020 14:37
>>> To:
[hidden email]
>>> Subject: Is it possible to send a command to a running copy of ImageJ
>> via a socket?
>>>
>>> Hello all.
>>>
>>> Is it possible to send a command to a running copy of ImageJ via a
>> socket?
>>>
>>> The sort of thing I had in mind could be illustrated with the unix 'nc'
>> command as follows:
>>>
>>> $ echo 'open /path/to/file/Meta1.tif' | nc localhost 57294
>>>
>>> I can see that ImageJ can use Socket ports to prevent multiple instances
>> of ImageJ from running but
>>> I cannot see how to explicitly send a command via a Socket.
>>>
>>> My final use case is from my own standalone java application to be able
>> to request an already
>>> running copy of ImageJ open an image file.
>>>
>>> If this is not possible is there already an ImageJ plugin that already
>> written that does the job?
>>>
>>> As ever thanks in advance for any help.
>>> Michael Ellis
>>>
>>> Digital Scientific UK Ltd
>>>
>>> --
>>> ImageJ mailing list:
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