io.github.laskowski.shell.runner.DefaultShellTaskRunner Maven / Gradle / Ivy

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Library to launch .bat and .sh scripts of your choice with different configurations. Allows you to read tasks and services output from terminal

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package io.github.laskowski.shell.runner;

import io.github.laskowski.shell.exceptions.ErrorDetectedException;
import io.github.laskowski.shell.exceptions.ShellTaskFailedException;
import io.github.laskowski.shell.output.OutputListener;
import io.github.laskowski.shell.output.Publisher;
import io.github.laskowski.shell.output.StringSubscriber;
import io.github.laskowski.shell.output.service.ServiceReadyStrategy;
import io.github.laskowski.shell.task.ShellTask;
import io.github.rafal.laskowski.wait.Wait;

import java.util.ArrayList;
import java.util.List;

public class DefaultShellTaskRunner implements ShellTaskRunner {
    private static DefaultShellTaskRunner taskRunner;
    private final List> tasks = new ArrayList<>();

    private DefaultShellTaskRunner() {}

    public synchronized static DefaultShellTaskRunner getInstance() {
        if (taskRunner == null) {
            taskRunner = new DefaultShellTaskRunner();
        }
        return taskRunner;
    }

    @Override
    public void run(ShellTask shellTask, OutputListener outputListener, ServiceReadyStrategy serviceReadyStrategy) {
        Publisher publisher = outputListener.getPublisher();
        StringSubscriber subscriber = outputListener.getSubscriber();
        Thread outputListenerThread = new Thread(() -> {
            Process process = shellTask.getProcess();

            publisher.registerSubscriber(subscriber);
            publisher.startPublishing(process);
        });

        outputListenerThread.start();

        Thread processThread = new Thread(shellTask::start);
        processThread.start();

        new Wait()
                .withTimeout(serviceReadyStrategy.getTimeout())
                .withMessage(serviceReadyStrategy.getTimeoutMessage())
                .until(() -> {
                    try {
                        return subscriber.getLines().stream().anyMatch(serviceReadyStrategy.getReadyPredicate());
                    } catch (ErrorDetectedException e) {
                        throw new ShellTaskFailedException(shellTask, e);
                    }
                });

        tasks.add(shellTask);
    }

    @Override
    public void stop(ShellTask shellTask) {
        tasks.remove(shellTask);
        shellTask.stop();
    }

    @Override
    public void stopAll() {
        tasks.forEach(ShellTask::stop);
    }
}