pzalejko.iot.hardware.home.core.task.TemperatureTask.java Source code

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Here is the source code for pzalejko.iot.hardware.home.core.task.TemperatureTask.java

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/*******************************************************************************
 * Copyright (c) 2015 Pawel Zalejko(p.zalejko@gmail.com).
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Apache License Version 2.0
 * which accompanies this distribution, and is available at
 * http://www.apache.org/licenses/
 *******************************************************************************/

package pzalejko.iot.hardware.home.core.task;

import java.util.Optional;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.springframework.stereotype.Component;

import pzalejko.iot.common.home.api.TemperatureEntity;
import pzalejko.iot.common.home.api.event.Event;
import pzalejko.iot.common.home.api.event.EventBus;
import pzalejko.iot.common.home.api.event.EventListener;
import pzalejko.iot.common.home.api.event.EventType;
import pzalejko.iot.hardware.home.api.config.ConfigurationService;
import pzalejko.iot.hardware.home.api.config.TemperatureSensorConfiguration;
import pzalejko.iot.hardware.home.api.temperature.TemperatureService;

/**
 * The {@link TemperatureTask} is responsible for reading a temperature value from the sensor.
 */
@Component
public class TemperatureTask implements Runnable, EventListener {

    private final TemperatureService service;
    private final EventBus eventBus;
    private final ConfigurationService configurationService;

    private long readFrequency;

    @Inject
    public TemperatureTask(TemperatureService service, EventBus eventBus,
            ConfigurationService configurationService) {
        this.service = service;
        this.eventBus = eventBus;
        this.configurationService = configurationService;
    }

    @PostConstruct
    public void init() {
        final TemperatureSensorConfiguration tempConfiguration = configurationService.getTemperatureConfiguration();
        readFrequency = tempConfiguration.getReadFrequency();
    }

    /**
     * Gets a time value determining how often a temperature value should be read.
     * 
     * @return a time value in milliseconds.
     */
    public long getReadFrequency() {
        return readFrequency;
    }

    @Override
    public void handle(Event event) {
        if (event.getType() == EventType.PUBLISH_TEMPERATURE_REQUEST) {
            run();
        }
    }

    @Override
    public void run() {
        final Optional<TemperatureEntity> temperatureEntity = service.getTemperatureEntity();
        temperatureEntity.ifPresent(t -> eventBus.postLocal(t, EventType.TEMPERATURE_VALUE));
    }
}