ariba.util.io
Class ARProcess

java.lang.Object
  ariba.util.io.ARProcess

Direct Known Subclasses:

FileSortProcess

Deprecated. Use ariba.util.io.Exec

public class ARProcess
extends java.lang.Object

Class ARProcess encapsulates the mess Java created with process management. There may be more succinct implementations possible but this is truly what was necessary to implement an interface to allow one to start, monitor and stop a process. ARProcess allows you to specify the command line via the constructor or setArguments. You can then launch the process (i.e. launch()) After launch you can call isAlive(), getOutputString(), join() and kill(). Calling launch again, will discard the results in the "outputstring" as expected. When isAlive() returns true exitCode() returns the process return code. Why the Java process interface sucks: 1) There isn't a non-blocking check for "aliveness". 2) Unless you flush the outgoing streams (from the process) the process will not terminate. 3) The standard output from .bat files are not properly captured by the return streams. 4) A process id would be nice (so you could track back to the system) 5) The InputStream(s) available() member does not work. Finally, I later realized that rather than putting the two threads that are draining the std-err/out streams in a loop I could trigger them when the caller calls isAlive() thereby reducing the wasted cycles checking for output. One could also pool the byte arrays used to read output - a necessary evil of the fact that available doesn't work.

Constructor Summary

ARProcess()
Deprecated.

ARProcess(java.lang.String[] args)
Deprecated.

Method Summary

java.lang.String[]	arguments() Deprecated.
int	exitCode() Deprecated.
boolean	isAlive() Deprecated.
void	kill() Deprecated.
boolean	launch() Deprecated.
java.lang.String	outputString() Deprecated.
java.lang.Process	process() Deprecated.
void	setArguments(java.lang.String args) Deprecated. Of course this is only meaningful to the next call to launch()
void	setArguments(java.lang.String[] args) Deprecated. Of course this is only meaningful to the next call to launch()
java.lang.String	standardErrorString() Deprecated.
java.lang.String	standardOutputString() Deprecated.
void	waitFor() Deprecated.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ARProcess

public ARProcess(java.lang.String[] args)

Deprecated.

ARProcess

public ARProcess()

Deprecated.

Method Detail

arguments

public java.lang.String[] arguments()

Deprecated.

setArguments

public void setArguments(java.lang.String[] args)

Deprecated.

Of course this is only meaningful to the next call to launch()

setArguments

public void setArguments(java.lang.String args)

Deprecated.

Of course this is only meaningful to the next call to launch()

launch

public boolean launch()

Deprecated.

process

public java.lang.Process process()

Deprecated.

isAlive

public boolean isAlive()

Deprecated.

kill

public void kill()

Deprecated.

waitFor

public void waitFor()

Deprecated.

exitCode

public int exitCode()

Deprecated.

outputString

public java.lang.String outputString()

Deprecated.

standardOutputString

public java.lang.String standardOutputString()

Deprecated.

standardErrorString

public java.lang.String standardErrorString()

Deprecated.