Class ProcessPipeUtils

java.lang.Object

org.aksw.commons.io.process.pipe.ProcessPipeUtils

public class ProcessPipeUtils
extends Object

Utility functions to create file and input stream transform based on system calls InputStreams passed as arguments to the various processors are considered to be owned by the processors. Hence, the processors are in charge of closing them. The client code is in charge of closing InputStreams returned by the processors. TODO Enhance the FileCreation objects such that they expose a future for when the process started modifying the file.

Author:

raven

Constructor Summary

Constructors

Constructor	Description
ProcessPipeUtils()

Method Summary

Modifier and Type	Method	Description
static FileCreation	createFileCreation(Process process, Path path)
static Function<InputStream, InputStream>	createPipedTransformer(BiConsumer<InputStream, OutputStream> action)	TODO Move this method elsewhere as it does not make use of a process Transformation using a piped input/outputstream createPipedTransform((in, out) -> { for(item : () -> readItems(in)) { write(item); } )
static BiFunction<Path, Path, FileCreation>	mapPathToPath(BiFunction<Path,Path,String[]> cmdBuilder)
static PathToStream	mapPathToStream(Function<Path,String[]> cmdBuilder)
static BiFunction<InputStreamOrPath, Path, FileCreation>	mapStreamToPath(Function<Path,String[]> cmdBuilder)
static StreamToStream	mapStreamToStream(String[] cmd)
static Process	startProcess(ProcessBuilder processBuilder)
static Thread	startThreadedCopy(InputStream from, OutputStream to, Consumer<Exception> failureCallback)	Create a new thread to copy from source to target TODO Closing the target silently terminate the thread and associated resources (such as a system process) Closing the input stream should not happen though as it is considered to be owned by the copy process

Methods inherited from class Object

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

Constructor Details

ProcessPipeUtils

public ProcessPipeUtils()

Method Details

createPipedTransformer

public static Function<InputStream, InputStream> createPipedTransformer(BiConsumer<InputStream, OutputStream> action)

TODO Move this method elsewhere as it does not make use of a process Transformation using a piped input/outputstream createPipedTransform((in, out) -> { for(item : () -> readItems(in)) { write(item); } )

Parameters:

action -

Returns:

startThreadedCopy

public static Thread startThreadedCopy(InputStream from,
 OutputStream to,
 Consumer<Exception> failureCallback)

Create a new thread to copy from source to target TODO Closing the target silently terminate the thread and associated resources (such as a system process) Closing the input stream should not happen though as it is considered to be owned by the copy process

Parameters:

from -

to -

Returns:

startProcess

public static Process startProcess(ProcessBuilder processBuilder)

mapPathToStream

public static PathToStream mapPathToStream(Function<Path,String[]> cmdBuilder)

createFileCreation

public static FileCreation createFileCreation(Process process,
 Path path)

mapStreamToPath

public static BiFunction<InputStreamOrPath, Path, FileCreation> mapStreamToPath(Function<Path,String[]> cmdBuilder)

mapPathToPath

public static BiFunction<Path, Path, FileCreation> mapPathToPath(BiFunction<Path,Path,String[]> cmdBuilder)

mapStreamToStream

public static StreamToStream mapStreamToStream(String[] cmd)