Instructions: 1. Download the jar file, and save it on your computer 2. Open command prompt in windows (search for cmd) 3. Type 'cd' followed by the path of the directory that contains the jar file 4. Type 'java-jar RanPassGenv1.jar' 5. Follow the instructions that appear in command prompt. This was a simple test program I made in 15 minutes.
- Download Java editor - Simple and straightforward Java code editor that features a compiler, interpreter and applet viewer, command-line parameters, and HTML generator.
- Download Java editor - Simple and straightforward Java code editor that features a compiler, interpreter and applet viewer, command-line parameters, and HTML generator.
Introduction
Procrun is a set of applications that allow Windows users to wrap (mostly) Java applications (e.g. Tomcat) as a Windows service.
The service can be set to automatically start when the machine boots and will continue to run with no user logged onto the machine.
Procrun monitor application
Prunmgr is a GUI application for monitoring and configuring procrun services.
Each command line directive is in the form of //XX[//ServiceName]
If the //ServiceName parameter is omitted, then the service name is assumed to be the name of the file.
The Prunsrv application behaves in the same way, so to allow both applications to reside in the same directory, the Prunmgr application will remove a trailing w (lower-case w) from the name.
For example if the Prunmgr application is renamed as TestService.exe - or as TestServicew.exe - then the default service name is TestService.
The available command line options are:
| //ES | Edit service configuration | This is the default operation. It is called if the no option is provided. Starts the GUI application which allows the service configuration to be modified, started and stopped. |
|---|---|---|
| //MS | Monitor service | Starts the GUI application and minimizes it to the system tray. |
| //MR | Monitor & run service | Starts the GUI application and minimizes it to the system tray. Start the service if it is not currently running. |
| //MQ | Monitor Quit | Stop any running monitor for the service. |
Procrun service application
Prunsrv is a service application for running applications as services. It can convert any application (not just Java applications) to run as a service.
Command line arguments
Each command line directive is in the form of //XX[//ServiceName].
If the //ServiceName parameter is omitted, then the service name is assumed to be the name of the file.
For example if the application is renamed as TestService.exe, then the default service name is TestService.
The available command line options are:
| //TS | Run the service as a console application | This is the default operation. It is called if the no option is provided. |
|---|---|---|
| //RS | Run the service | Called only from ServiceManager |
| //ES | Start (execute) the service | |
| //SS | Stop the service | |
| //US | Update service parameters | |
| //IS | Install service | |
| //DS | Delete service | Stops the service first if it is currently running |
| //PS | Print service | Prints the command to (re-)create the current configuration |
| //PP[//seconds] | Pause | Default is 60 seconds |
| //VS | Version | Print version and exit (since version 1.0.3) |
| //? | Help | Print usage and exit (since version 1.0.3) |
Starting with version 1.0.8 a more traditional command line can be used in the form: command [ServiceName].
| run | Run the service as a console application | This is the default operation. It is called if the no option is provided and has the same effect as calling //TS. |
|---|---|---|
| service | Run the service | Called only from ServiceManager |
| start | Start the service | Synonym for //ES |
| stop | Stop the service | Synonym for //SS |
| update | Update service parameters | Synonym for //US |
| install | Install service | Synonym for //IS |
| delete | Delete service | Stops the service first if it is currently running |
| Print service | Prints the command to (re-)create the current configuration | |
| pause [seconds] | Pause | Default is 60 seconds |
| version | Version | Print version and exit |
| help | Help | Print usage and exit |
Command line parameters
Each command parameter is prefixed with -- (or ++, see below).
If an environment variable exists with the same name as a command line parameter but prefixed with PR_ it will override the equivalent command line parameter.
For example:
is equivalent to providing
as a command line parameter.
If a parameter is repeated, then normally the last value takes precedence.However some parameters can take multiple values - for example StartParams and JvmOptions.If these parameters are prefixed with ++, then the value will be appended to the existing value.For example:
will result in the following values being used:Only multi-valued parameters support this; they are indicated in the table below by
++.If
++ is used for a parameter that does not support multiple values,then it is treated the same as --. No error is reported.Configuration is overwritten in case
-- is used.For example:will always overwrite the JvmOptions. The resulting configuration will be:However if on ++ is used the values will be appended. For example calling thefollowing after the first examplewill result in the following values being used:In case you intermix the
++ and -- options, thelast -- parameter will cause option reset. For example:will result in the following values being used:When updating a service (//US or update command), using -- will replace any existing parameter with the new setting.
For multi-valued parameters, using the ++ option qualifier will add the new value(s) to any existing value(s).
| Parameter Name | Default | Description |
|---|---|---|
| --Description | Service name description (maximum 1024 characters) | |
| --DisplayName | ServiceName | Service display name |
| --Install | procrun.exe //RS//ServiceName | Install image |
| --Startup | manual | Service startup mode can be either delayed, auto or manual |
| --Type | Service type can be interactive to allow the service to interact with the desktop. This option can only be used with the LocalSystem account. | |
| ++DependsOn | List of services that this service depends on. Dependent services are separated using either # or ; characters | |
| ++Environment | List of environment variables that will be provided to the service in the form key=value. They are separated using either # or ; characters. If you need to embed either # or ; character within a value put them inside single quotes. | |
| --User | User account used for running executable. It is used only for StartMode Java or exe and enables running applications as a service under an account without the LogonAsService privilege. | |
| --Password | Password for user account set by --User parameter | |
| --ServiceUser | Specifies the name of the account under which the service should run. Use an account name in the form DomainNameUserName. The service process will be logged on as this user. if the account belongs to the built-in domain, you can specify .UserName Note that the Service Control Manager does not accept localised forms of the standard names so to use them you need to specify NT AuthorityLocalService, NT AuthorityNetworkService or LocalSystem as appropriate. | |
| --ServicePassword | Password for user account set by --ServiceUser parameter | |
| --LibraryPath | Directory added to the search path used to locate the DLLs for the JVM. This directory is added both in front of the PATH environment variable and as a parameter to the SetDLLDirectory function. | |
| --JavaHome | JAVA_HOME | Set a different JAVA_HOME than defined by JAVA_HOME environment variable |
| --Jvm | auto | Use either auto (i.e. find the JVM from the Windows registry) or specify the full path to the jvm.dll. You can use environment variable expansion here. When auto is specified the following search order is used:
|
| ++JvmOptions | -Xrs | List of options in the form of -D or -X that will be passed to the JVM. The options are separated using either # or ; characters. If you need to embed either # or ; character put them inside single quotes. (Not used in exe mode.) |
| ++JvmOptions9 | List of options in the form of -D or -X that will be passed to the JVM when running on Java 9 or later. The options are separated using either # or ; characters. If you need to embed either # or ; character put them inside single quotes. (Not used in exe mode.) | |
| --Classpath | Set the Java classpath. (Not used in exe mode.) | |
| --JvmMs | Initial memory pool size in MB. (Not used in exe mode.) | |
| --JvmMx | Maximum memory pool size in MB. (Not used in exe mode.) | |
| --JvmSs | Thread stack size in KB. (Not used in exe mode.) | |
| --StartMode | One of jvm, Java or exe. The modes are:
| |
| --StartImage | Executable that will be run. Only applies to exe mode. | |
| --StartPath | Working path for the start image executable. | |
| --StartClass | Main | Class that contains the startup method. Applies to the jvm and Java modes. (Not used in exe mode.) |
| --StartMethod | main | Name of method to be called when service is started. It must be static void and have argument (String args[]). Only applies to jvm mode - in Java mode, the main method is always used. Note: in jvm mode, the start method should not return until the stop method has been called. |
| ++StartParams | List of parameters that will be passed to either StartImage or StartClass. Parameters are separated using either # or ; character. | |
| --StopMode | One of jvm, Java or exe. See --StartMode for further details. | |
| --StopImage | Executable that will be run on Stop service signal. Only applies to exe mode. | |
| --StopPath | Working path for the stop image executable. Does not apply to jvm mode. | |
| --StopClass | Main | Class that will be used on Stop service signal. Applies to the jvm and Java modes. |
| --StopMethod | main | Name of method to be called when service is stopped. It must be static void and have argument (String args[]). Only applies to jvm mode. In Java mode, the main method is always used. |
| ++StopParams | List of parameters that will be passed to either StopImage or StopClass. Parameters are separated using either # or ; character. | |
| --StopTimeout | No Timeout | Defines the timeout in seconds that procrun waits for service to exit gracefully. |
| --LogPath | %SystemRoot%System32LogFilesApache | Defines the path for logging. Creates the directory if necessary. |
| --LogPrefix | commons-daemon | Defines the service log filename prefix. The log file is created in the LogPath directory with .YEAR-MONTH-DAY.log suffix |
| --LogLevel | Info | Defines the logging level and can be either Error, Info, Warn or Debug. (Case insensitive). |
| --LogJniMessages | 0 | Set this non-zero (e.g. 1) to capture JVM jni debug messages in the procrun log file. Is not needed if stdout/stderr redirection is being used. Only applies to jvm mode. |
| --StdOutput | Redirected stdout filename. If named auto file is created inside LogPath with the name service-stdout.YEAR-MONTH-DAY.log. | |
| --StdError | Redirected stderr filename. If named auto file is created in the LogPath directory with the name service-stderr.YEAR-MONTH-DAY.log. | |
| --PidFile | Defines the file name for storing the running process id. Actual file is created in the LogPath directory |
Installing services
To install the service, you need to use the //IS parameter.
Install the service named 'TestService'
Updating services
To update the service parameters, you need to use the //US parameter.
Java Command Line Tools
Update the service named 'TestService'
Removing services
To remove the service, you need to use the //DS parameter.If the service is running it will be stopped and then deleted.
Remove the service named 'TestService'
Java Command Line Options
Debugging services
To run the service in console mode, you need to use the //TS parameter.The service shutdown can be initiated by pressing CTRL+C orCTRL+BREAK.If you rename the prunsrv.exe to testservice.exe then you can just execute thetestservice.exe and this command mode will be executed by default.
Run the service named 'TestService' in console mode
Using Procrun in jvm mode
To interface with the Procrun service application (prunsrv) using the jvm mode,you need to create a class with the appropriate method(s).For example:
This should be configured as follows:The above example uses a single 'main' method, and uses a string parameter to specify whether the service functionis start or stop.Alternatively, you can use different method names for the service start and stop functions:This should be configured as follows:Note: in jvm mode, the start method should not return until the stop method hasbeen called. The start and stop methods are called from different threads.
Using Procrun in Java or exe mode
When using the Java or exe modes, the Procrun service application (prunsrv)launches the target application in a separate process.The 'stop' application needs to communicate somehow with the 'start' application to tell it to stop.For example, using RPC.
Windows Registry Usage
The basic Service definitions are maintained under the registry key:
Java Command Line App
Additional parameters are stored in the registry at:On 64-bit Windows procrun always uses 32-bit registry view for storing the configuration.This means that parameters will be stored inside:
Command Line Arguments in Java
Java Command Line Input
If any input value is passed through the command prompt at the time of running of the program is known as command line argument by default every command line argument will be treated as string value and those are stored in a string array of main() method.
Program Command Line Argument in Java
Output
Compile and Run above programs
When the above statement is executing the following sequence of steps will take place.
- Class loader sub-system loads SumDemo along with Command line argument(10, 20) and in main memory.
- JVM takes the loaded class SumDemo along with Command line arguments (10, 20) and place the number of values in the length variable that is 2.
- JVM looks for main() that is JVM will place the Command in the main() in the form of string class that is.
- Hence all the CMD line arguments of Java are sending to main() method available in the form of an array of object of String class (every CMD are available or stored in main method in the form of an array of object of String class).
- JVM calls the main() method with respect to load class SumDemo that is SumDemo.main().
Accept command line arguments and display their values
Note: Except + operator any numeric operation not allowed in command line arguments.
Square of Number by reading value from command prompt.
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