1:   2:   3:   4:   5:   6:   7:   8:   9:  10:  11:  12:  13:  14:  15:  16:  17:  18:  19:  20:  21:  22:  23:  24:  25:  26:  27:  28:  29:  30:  31:  32:  33:  34:  35:  36:  37:  38:  39:  40:  41:  42:  43:  44:  45:  46:  47:  48:  49:  50:  51:  52:  53:  54:  55:  56:  57:  58:  59:  60:  61:  62:  63:  64:  65:  66:  67:  68:  69:  70:  71:  72:  73:  74:  75:  76:  77:  78:  79:  80:  81:  82:  83:  84:  85:  86:  87:  88:  89:  90:  91:  92:  93:  94:  95:  96:  97:  98:  99: 100: 101: 102: 103: 104: 105: 106: 107: 108: 109: 110: 111: 112: 113: 114: 115: 116: 117: 118: 119: 120: 

<?php

namespace SAREhub\Commons\Service;

use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;

abstract class ServiceSupport implements Service
{

    /**
     * @var LoggerInterface
     */
    private $logger;

    private $started = false;
    private $stopped = true;

    public function start()
    {
        if (!$this->isStarted()) {
            $this->getLogger()->info('service starting ...');
            $this->doStart();
            $this->started = true;
            $this->stopped = false;
            $this->getLogger()->info('service started');
        }
    }

    public function tick()
    {
        try {
            if ($this->isRunning()) {
                $this->doTick();
            }
        } catch (\Exception $e) {
            try {
                $this->stop();
            } catch (\Exception $e2) {
                // we wants only orginal exception
            }

            throw $e;
        }
    }

    public function stop()
    {
        if ($this->isStarted()) {
            try {
                $this->getLogger()->info('service stopping ...');
                $this->doStop();
            } finally {
                $this->started = false;
                $this->stopped = true;
                $this->getLogger()->info('service stopped');
            }
        }
    }

    public function isStarted()
    {
        return $this->started;
    }

    public function isStopped()
    {
        return $this->stopped;
    }

    public function isRunning()
    {
        return $this->started;
    }

    public function getLogger()
    {
        if ($this->logger === null) {
            $this->logger = new NullLogger();
        }

        return $this->logger;
    }

    public function setLogger(LoggerInterface $logger)
    {
        if ($this->getLogger() === $logger) {
            throw new \LogicException('set same logger instance');
        }

        $this->logger = $logger;
    }

    /**
     * Contains custom worker start logic
     * @throws \Exception When something was wrong.
     */
    protected function doStart()
    {

    }

    /**
     * Contains custom worker tick logic
     * @throws \Exception When something was wrong.
     */
    protected function doTick()
    {

    }

    /**
     * Contains custom worker stop logic
     * @throws \Exception When something was wrong.
     */
    protected function doStop()
    {

    }
}