net.morimekta.console.terminal

Class ProgressManager

java.lang.Object

net.morimekta.console.terminal.ProgressManager

All Implemented Interfaces:

AutoCloseable

public class ProgressManager
extends Object
implements AutoCloseable

Show progress on a number of tasks. The tasks can be dynamically created and finished. E.g if a number of large files needs to be downloaded they can be given a task each, and only a certain number of files will be downloaded at the same time. Example:

 try (ProgressManager progress = new ProgressManager(term, Progress.Spinner.CLOCK)) {
     Future<String> first = progress.addTask("First Task", 10000, task -> {
         // All the work
         task.accept(10000);
         return "OK";
     });
     Future<String> second = progress.addTask("Second Task", 10000, task -> {
         // All the work
         task.accept(10000);
         return "OK";
     });

     progress.waitAbortable();

     term.println("First: " + first.get());
     term.println("Second: " + second.get());
 } finally {
     term.println();
 }
 

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ProgressManager.ProgressHandler<T>

Constructor Summary

Constructors

Constructor and Description
ProgressManager(Terminal terminal, Progress.Spinner spinner) Create a progress bar using the given terminal.
ProgressManager(Terminal terminal, Progress.Spinner spinner, int max_tasks) Create a progress bar using the given terminal.

Method Summary

Modifier and Type	Method and Description
<T> Future<T>	addTask(String title, long total, ProgressManager.ProgressHandler<T> handler) Add a task to be done while showing progress.
void	close() Close the progress and all tasks associated with it.
protected List<String>	lines()
void	waitAbortable() Wait for all scheduled tasks to finish allowing the user to abort all tasks with <ctrl>-C.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProgressManager

public ProgressManager(@Nonnull
                       Terminal terminal,
                       @Nonnull
                       Progress.Spinner spinner)

Create a progress bar using the given terminal.

Parameters:

terminal - The terminal to use.

spinner - The spinner to use.

ProgressManager

public ProgressManager(@Nonnull
                       Terminal terminal,
                       @Nonnull
                       Progress.Spinner spinner,
                       int max_tasks)

Create a progress bar using the given terminal.

Parameters:

terminal - The terminal to use.

spinner - The spinner to use.

max_tasks - Maximum number fo concurrent inProgress.

Method Detail

close

public void close()

Close the progress and all tasks associated with it.

Specified by:

close in interface AutoCloseable

waitAbortable

public void waitAbortable()
                   throws IOException,
                          InterruptedException

Wait for all scheduled tasks to finish allowing the user to abort all tasks with <ctrl>-C.

Throws:

IOException - If interrupted by user.

InterruptedException - If interrupted by system or other threads.

addTask

public <T> Future<T> addTask(String title,
                             long total,
                             ProgressManager.ProgressHandler<T> handler)

Add a task to be done while showing progress. If there are too many tasks ongoing, the task will be queued and done when the local thread pool has available threads.

Type Parameters:

T - The return type for the task.

Parameters:

title - The progress title of the task.

total - The total progress to complete.

handler - The handler to do the task behind the progress being shown.

Returns:

The future returning the task result.

lines

protected List<String> lines()