Java tutorial
/** * * Copyright 2015 Ludwig Andersson * * This file is part of Thermospy-server. * * Thermospy-server is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Thermospy-server is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermospy-server. If not, see <http://www.gnu.org/licenses/>. * */ package com.luan.thermospy.server.core; import com.fasterxml.jackson.annotation.JsonIgnore; import com.fasterxml.jackson.annotation.JsonProperty; import com.luan.thermospy.server.actions.CameraAction; import com.luan.thermospy.server.db.Session; import com.luan.thermospy.server.db.Temperatureentry; import com.luan.thermospy.server.db.dao.TemperatureEntryDAO; import io.dropwizard.db.DataSourceFactory; import java.io.File; import java.util.Date; import java.util.List; import org.eclipse.jetty.util.log.Log; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.AnnotationConfiguration; /** * The man in the middle who connects all the dots. * The Controller contains the settings and actions and is accessed fromm * different threads. */ public class ThermospyController { @JsonProperty private int refreshRate = 0; @JsonIgnore final private Object myLock = new Object(); @JsonIgnore CameraAction camera = null; @JsonIgnore private int temperature = Integer.MIN_VALUE; @JsonIgnore private Boundary displayBoundary = new Boundary(0, 0, 0, 0); @JsonIgnore private ServerStatus serverStatus = ServerStatus.OK; @JsonIgnore private Session logSession = null; @JsonIgnore TemperatureEntryDAO temperatureEntryDao = null; @JsonIgnore private SessionFactory sessionFactory; public int getTemperature() { synchronized (myLock) { return temperature; } } public void setTemperature(int temperature) { synchronized (myLock) { if (this.temperature != temperature) { String fromTemperature = this.temperature == Integer.MIN_VALUE ? "--" : Integer.toString(this.temperature); String toTemperature = temperature == Integer.MIN_VALUE ? "--" : Integer.toString(temperature); Log.getLog().info("Temperature changed from " + fromTemperature + " to " + toTemperature); this.temperature = temperature; } if (this.logSession != null && this.temperature != Integer.MIN_VALUE) { org.hibernate.Session s = sessionFactory.openSession(); Transaction tx = null; try { tx = s.beginTransaction(); Temperatureentry entry = new Temperatureentry(); entry.setTimestamp(new Date()); entry.setFkSessionId(logSession.getId()); entry.setTemperature((double) temperature); s.save(entry); tx.commit(); } catch (Exception e) { if (tx != null) tx.rollback(); this.serverStatus = ServerStatus.INTERNAL_SERVER_ERROR; } s.close(); } } } public Boundary getDisplayBoundary() { synchronized (myLock) { return displayBoundary; } } public void setDisplayBoundary(Boundary displayBoundary) { synchronized (myLock) { this.displayBoundary = displayBoundary; } } public void start() { camera.start(); } public boolean singleshot() { return camera.singleshot(); } public void stop() { camera.stop(); temperature = Integer.MIN_VALUE; } public void setCameraAction(CameraAction actionHandler) { this.camera = actionHandler; } public int getRefreshRate() { synchronized (myLock) { return refreshRate; } } public void setRefreshRate(int refreshRate) { synchronized (myLock) { this.refreshRate = refreshRate; } } public boolean getServiceStatus() { return camera.isRunning(); } /** * @return the serverStatus */ public ServerStatus getServerStatus() { synchronized (myLock) { return serverStatus; } } /** * @param serverStatus the serverStatus to set */ public void setServerStatus(ServerStatus serverStatus) { synchronized (myLock) { this.serverStatus = serverStatus; } } public Session getLogSession() { synchronized (myLock) { return this.logSession; } } public void setLogSession(Session session) { synchronized (myLock) { this.logSession = session; } } public void setTemperatureDao(TemperatureEntryDAO tempDAO) { this.temperatureEntryDao = tempDAO; } public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } public SessionFactory getSessionFactory() { return this.sessionFactory; } }