redmon | Monitor a Redis key | Command Line Interface library
kandi X-RAY | redmon Summary
kandi X-RAY | redmon Summary
Monitor a Redis key.
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Top functions reviewed by kandi - BETA
- Returns a Redis instance
- Check redis connection
- Get an environment variable
- Get time interval
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QUESTION
I am implementing a program that is the same as google cloud printer. It is a virtual printer using postscript class driver. As the picture shows(I add the 64 suffix). The chinese translating to english is Helpfile, ConfigurationFile DataFile DriverFile Dependency.
I use redmon to catch the standard input and use ghostscript to convert it to pdf. At the same time I get the job infomation from printer queue. With the pdf and job infomation, I can send them to my server. Then my server can print the document. I invoke ghostscript as the picture shows.
When I use WPS(a chinese application which is the same as Microsoft Word) to print docx document, the job infomation in job queue is correct. For example, when I print test.docx and select three copies, collate, color, I get the right result from job queue. Things get weird when it comes to Microsoft Word. When I use Microsoft Word to print docx, I get the job infomation from queue. No matter how much copies the user specifies, the copies is always one. At the same time, the converted pdf contains one copy too. This means that I have no way to achieve my goal(get pdf and job infomation like copies. Then send them to my server). Does anyone know how I can get the right number of copies, or at least it should behave as Microsoft Print to Pdf printer(as the ps illustrates). My written english is not good. Thanks!
ps: I also have tested Microsoft Print to PDF. If I select three copies in Word, the job infomation in job queue is always one. However, the destination pdf file contains three copies(If the docx is one page, the destination pdf is three pages).
...ANSWER
Answered 2020-Mar-22 at 16:16It seems like you've asked two questions here, and only one of them relates to Ghostscript. Your first question seems to be regarding what the Windows print subsystem displays when you print a job, I can't help you with that. In fact I doubt anyone other than the developers of the applications (WPS and Word) can tell you why they drive the print subsystem differently.
Your second question seems to be 'why do I only get one copy of the PDF file'. The first question I have to ask, then, is what you expect ? Do you expect one PDF file with three copies of the content, or 3 PDF files each containing one copy of the content ?
There are two possible ways to get multiple copies; firstly send the content three times and alternatively (in the PostScript program) set /#Copies to the number of required copies. I can't tell (because you have not supplied the PostScript program in either case) which approach is being used by each application.
If your problem is that you are getting three copies from WPS and one copy from Word, then my guess would be that WPS is sending the content 3 times, and Word is sending it once, but setting the number of copies to 3. The pdfwrite device in Ghostscript ignores /#Copies, and only produces one copy of the cotnent in the output.
You can't change that.
QUESTION
I've configured a PDF printer that uses Ghostscript to convert the document to a PDF, which is then processed and used by my Java desktop application. It redirects the printer data via a RedMon port. For most documents I print, it works fine and produces the PDF file as expected. However, with documents with a certain number of pages, the process simply freezes: no error is thrown, the process simply holds. It seems independent of filesize or printer properties (though the latter seems to influence the number of pages that do get printed).
After stopping the Java application, I'm left with a document with a fixed number of pages (usually 265 pages, but it also happened to end with 263 pages or 247 pages). The second to last page is incomplete (as in, partially-printed tables and texts), whereas the last page prints as an error:
...ANSWER
Answered 2019-Feb-21 at 13:00It turns out there is no problem with your printer, but rather with your code. More specifically, how you [do not] handle the Runtime streams. What your process is missing is a StreamGobbler.
A StreamGobbler is an InputStream that uses an internal worker thread to constantly consume input from another InputStream. It uses a buffer to store the consumed data. The buffer size is automatically adjusted, if needed.
Your process hangs because it cannot fully read the input stream. The following articles provide a very in-depth explanation as to why it happens and how to fix it:
When Runtime.exec() won't - Part 1
When Runtime.exec() won't - Part 2
But to quote the article itself (which, in turn, quotes the JDK Javadoc):
Because some native platforms only provide limited buffer size for standard input and output streams, failure to promptly write the input stream or read the output stream of the subprocess may cause the subprocess to block, and even deadlock.
The solution is to simply exhaust each input stream from your process by implementing a StreamGobbler class:
QUESTION
I've been trying to create an installer for a program I wrote in Java, implementing GhostScript, that creates a virtual printer where the file is sent to. My program then reads the files and manages it accordingly. However, I had to manually configure the RedMon Redirect Port (RPT1:) and manually created a new printer, using that port, taking as arguments the .jar file:
Arguments configured on the printer's port:
I was able to create a new printer via NSIS (the program I'm using to create the installer) like so:
...ANSWER
Answered 2017-Aug-18 at 11:15It took me a bit of digging, but I finally found the command required to setup a new printer port using RedMon, and figured I'd share it here so less people have a hard time finding it.
QUESTION
ANSWER
Answered 2017-Apr-27 at 06:36Maybe because Unidrv and Pscript are GDI based and XPSdrv is not.
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Install redmon
Redmon connects to your Redis connection with the following environment variables. If none are set, default values are used.
REDMON_REDIS_HOST (default, localhost) : Set it to where your Redis is running from.
REDMON_REDIS_PORT (default, 6379) : Set it to where your Redis is running on.
REDMON_TIME_INT (default, 1.0) : Set refresh interval for your Redis key
To watch a Redis key, just simply. Redmon now watches a key called sample every second.
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