Process

Process provides control of native processes started by ProcessBuilder.start and Runtime.exec (create a native process and return an instance of a subclass of Process that can be used to control the process and obtain information about it).

Ссылки:

ProcessBuilder (docs.oracle)

Process (docs.oracle)

Получение информации о процесссе

Stream<ProcessHandle> children()

Returns a snapshot of the direct children of the process.

The parent of a direct child process is the process. Typically, a process that is not alive has no children.

Stream<ProcessHandle> descendants()

Returns a snapshot of the descendants of the process.

The descendants of a process are the children of the process plus the descendants of those children, recursively.

ProcessHandle.Info info()

Returns a snapshot of information about the process.

ProcessHandle.Info:

Optional<String[]> arguments()

Returns an array of Strings of the arguments of the process.

Optional<String> command()

Returns the executable pathname of the process.

Optional<String> commandLine()

Returns the command line of the process.

Optional<Instant> startInstant()

Returns the start time of the process.

Optional<Duration> totalCpuDuration()

Returns the total cputime accumulated of the process.

Optional<String> user()

Return the user of the process.

boolean isAlive()

Tests whether the process represented by this Process is alive.

long pid()

Returns the native process ID of the process.

int exitValue()

Returns the exit value for the process.

Throws IllegalThreadStateException - if the process represented by this Process object has not yet terminated.

Note

By convention, the value 0 indicates normal termination.

Ссылки:

ProcessHandle.Info (docs.oracle)

Управление завершением процесса

boolean supportsNormalTermination()

Returns true if the implementation of destroy() is to normally terminate the process, Returns false if the implementation of destroy forcibly and immediately terminates the process.

void destroy()

Kills the process.

Process destroyForcibly()

Kills the process forcibly.

CompletableFuture<Process> onExit()

Returns a CompletableFuture<Process> for the termination of the Process.

int waitFor()

Causes the current thread to wait, if necessary, until the process represented by this Process object has terminated.

boolean waitFor​(long timeout, TimeUnit unit)

Causes the current thread to wait, if necessary, until the process represented by this Process object has terminated, or the specified waiting time elapses.

Работа с потоками ввода/вывода процесса

InputStream getErrorStream()

Returns the input stream connected to the error output of the process.

InputStream getInputStream()

Returns the input stream connected to the normal output of the process.

OutputStream getOutputStream()

Returns the output stream connected to the normal input of the process.

ProcessHandle

ProcessHandle identifies and provides control of native processes. Each individual process can be monitored for liveness, list its children, get information about the process or destroy it.

By comparison, Process instances were started by the current process and additionally provide access to the process input, output, and error streams.

ProcessHandle toHandle()

Returns a ProcessHandle for the Process.

Ссылки:

ProcessHandle (docs.oracle)