Java - Find out if either a GUI or a CLI is available
We have a Java server application which is using YAJSW in order to be run as a windows service. Sometimes the user will be prompted for specific stuff on server startup, such prompting can happen when there is a GUI (via a dialog) or a commandline (via commandline output and input). However, when running as a windows service, there is no way to ask the user for input.
Is there any way to find out if there is no GUI and no CLI available?
As far as I know, GraphicsEnvironment#isHeadless always returns true if a CLI is available, so it will return true when running as a Windows service as well. Therefore I won't be able to distinguish between those two modes.
What I thought I could do, is to simply pass a commandline parameter to the java server application (for example --iswindowsservice) which allows the programmer to distinguish between CLI and windows service mode.
Would there be any better way to solve this problem?
java windows windows-services
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
add a comment |
We have a Java server application which is using YAJSW in order to be run as a windows service. Sometimes the user will be prompted for specific stuff on server startup, such prompting can happen when there is a GUI (via a dialog) or a commandline (via commandline output and input). However, when running as a windows service, there is no way to ask the user for input.
Is there any way to find out if there is no GUI and no CLI available?
As far as I know, GraphicsEnvironment#isHeadless always returns true if a CLI is available, so it will return true when running as a Windows service as well. Therefore I won't be able to distinguish between those two modes.
What I thought I could do, is to simply pass a commandline parameter to the java server application (for example --iswindowsservice) which allows the programmer to distinguish between CLI and windows service mode.
Would there be any better way to solve this problem?
java windows windows-services
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
1
When in doubt, that parameter is a valid approach. Alternatively, using an ENV variable or system property would work.
– GhostCat
Nov 20 '18 at 14:36
Nice idea, a system property actually sounds easier. But I assume there is no built-in way to determine this status without manually passing anything, right?
– Marcel
Nov 20 '18 at 14:47
If I would know that, I would have written an answer already ;-)
– GhostCat
Nov 20 '18 at 14:48
Good point, I am little bit slow today ^^
– Marcel
Nov 20 '18 at 14:49
add a comment |
We have a Java server application which is using YAJSW in order to be run as a windows service. Sometimes the user will be prompted for specific stuff on server startup, such prompting can happen when there is a GUI (via a dialog) or a commandline (via commandline output and input). However, when running as a windows service, there is no way to ask the user for input.
Is there any way to find out if there is no GUI and no CLI available?
As far as I know, GraphicsEnvironment#isHeadless always returns true if a CLI is available, so it will return true when running as a Windows service as well. Therefore I won't be able to distinguish between those two modes.
What I thought I could do, is to simply pass a commandline parameter to the java server application (for example --iswindowsservice) which allows the programmer to distinguish between CLI and windows service mode.
Would there be any better way to solve this problem?
java windows windows-services
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
We have a Java server application which is using YAJSW in order to be run as a windows service. Sometimes the user will be prompted for specific stuff on server startup, such prompting can happen when there is a GUI (via a dialog) or a commandline (via commandline output and input). However, when running as a windows service, there is no way to ask the user for input.
Is there any way to find out if there is no GUI and no CLI available?
As far as I know, GraphicsEnvironment#isHeadless always returns true if a CLI is available, so it will return true when running as a Windows service as well. Therefore I won't be able to distinguish between those two modes.
What I thought I could do, is to simply pass a commandline parameter to the java server application (for example --iswindowsservice) which allows the programmer to distinguish between CLI and windows service mode.
Would there be any better way to solve this problem?
java windows windows-services
java windows windows-services
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
asked Nov 20 '18 at 14:33
MarcelMarcel
555521
555521
1
When in doubt, that parameter is a valid approach. Alternatively, using an ENV variable or system property would work.
– GhostCat
Nov 20 '18 at 14:36
Nice idea, a system property actually sounds easier. But I assume there is no built-in way to determine this status without manually passing anything, right?
– Marcel
Nov 20 '18 at 14:47
If I would know that, I would have written an answer already ;-)
– GhostCat
Nov 20 '18 at 14:48
Good point, I am little bit slow today ^^
– Marcel
Nov 20 '18 at 14:49
add a comment |
1
When in doubt, that parameter is a valid approach. Alternatively, using an ENV variable or system property would work.
– GhostCat
Nov 20 '18 at 14:36
Nice idea, a system property actually sounds easier. But I assume there is no built-in way to determine this status without manually passing anything, right?
– Marcel
Nov 20 '18 at 14:47
If I would know that, I would have written an answer already ;-)
– GhostCat
Nov 20 '18 at 14:48
Good point, I am little bit slow today ^^
– Marcel
Nov 20 '18 at 14:49
1
1
When in doubt, that parameter is a valid approach. Alternatively, using an ENV variable or system property would work.
– GhostCat
Nov 20 '18 at 14:36
When in doubt, that parameter is a valid approach. Alternatively, using an ENV variable or system property would work.
– GhostCat
Nov 20 '18 at 14:36
Nice idea, a system property actually sounds easier. But I assume there is no built-in way to determine this status without manually passing anything, right?
– Marcel
Nov 20 '18 at 14:47
Nice idea, a system property actually sounds easier. But I assume there is no built-in way to determine this status without manually passing anything, right?
– Marcel
Nov 20 '18 at 14:47
If I would know that, I would have written an answer already ;-)
– GhostCat
Nov 20 '18 at 14:48
If I would know that, I would have written an answer already ;-)
– GhostCat
Nov 20 '18 at 14:48
Good point, I am little bit slow today ^^
– Marcel
Nov 20 '18 at 14:49
Good point, I am little bit slow today ^^
– Marcel
Nov 20 '18 at 14:49
add a comment |
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1
When in doubt, that parameter is a valid approach. Alternatively, using an ENV variable or system property would work.
– GhostCat
Nov 20 '18 at 14:36
Nice idea, a system property actually sounds easier. But I assume there is no built-in way to determine this status without manually passing anything, right?
– Marcel
Nov 20 '18 at 14:47
If I would know that, I would have written an answer already ;-)
– GhostCat
Nov 20 '18 at 14:48
Good point, I am little bit slow today ^^
– Marcel
Nov 20 '18 at 14:49