OsVastSubprocess

Programmer Reference : Native Process Framework (OsProcess) : OsVastSubprocess

OsVastSubprocess

Description

Instances of <OsVastSubprocess> are cross-platform handles representing operating system processes that have been spawned by VAST

Stdio Streams

Instances of this class add the concepts of stdio streams to a native process.

#inputStream - A write stream connecting to the stdin on the subprocess
#outputStream - A read stream connecting to the stdout of the subprocess
#errorStream - A read stream connecting to the stderr of the subprocess

Tracing

Instances of this class also add the concept of tracing. This trace information provides detailed info about the spawning of the subprocess.

#traceStream - A read stream on the optional trace information for the process.

Class Methods

all

<pre><code> Private: Use OsProcesses>>spawned Answer an array of pid sorted subprocesses of VAST that were active at the time this call was made

 Answers:
    <Array>

</code></pre> </details>

deadlockAvoidanceMs

<pre><code> Answer the wait (in milliseconds) that occurs in the DeadlockAvoidance process loop

 Answers:
    <Integer>

</code></pre> </details>

deadlockAvoidanceMs:

<pre><code> Set the wait (in milliseconds) that occurs in the DeadlockAvoidance process loop

A lower number means less time for the os pipe buffer to fill up

</code></pre> </details>

Instance Methods

closeStreams

  Close all stdio streams.
     Ignore any exceptions

</details>

errorStream

<pre><code> Answer the stderr stream of the process. @see OsNativeProcess>>stderrStream comments for more details.

 Answers:
    <OsProcessStream>

</code></pre> </details>

inputStream

<pre><code> Answer the stdin stream of the process. @see OsNativeProcess>>stdinStream comments for more details.

 Answers:
    <OsProcessStream>

</code></pre> </details>

isDetached

<pre><code> Answer true if this subprocess is running in detached mode, false otherwise. @see OsProcessStarter>>detached for a detailed description

 Answers:
    <Boolean>

</code></pre> </details>

isVastSubprocess

<pre><code> Object check

 Answers:
    <Boolean> true

</code></pre> </details>

outputStream

<pre><code> Answer the stdout stream of the process. @see OsNativeProcess>>stdoutStream comments for more details.

 Answers:
    <OsProcessStream>

</code></pre> </details>

traceStream

<pre><code> Answer the newline separated tracing read stream. If tracing was not enabled, then this stream will be positioned at the end.

 A 'trace' will capture information regarding the details
 of how the subprocess was spawned, along with any
 errors that may have occurred.

 Answers:
    <ReadStream>

</code></pre> </details>

Last modified date: 07/07/2022