From f0b99fd68cb3b6b484d50c1f9ebc0e77997fd2dd Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Wed, 9 Jan 2013 20:32:40 +1300
Subject: Completely rewritten project

---
 .../traccar/web/server/model/DataServiceImpl.java  | 172 +++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 src/org/traccar/web/server/model/DataServiceImpl.java

(limited to 'src/org/traccar/web/server')

diff --git a/src/org/traccar/web/server/model/DataServiceImpl.java b/src/org/traccar/web/server/model/DataServiceImpl.java
new file mode 100644
index 00000000..cfcc6226
--- /dev/null
+++ b/src/org/traccar/web/server/model/DataServiceImpl.java
@@ -0,0 +1,172 @@
+package org.traccar.web.server.model;
+
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.naming.Context;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import javax.persistence.EntityManager;
+import javax.persistence.Persistence;
+import javax.persistence.TypedQuery;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpSession;
+
+import org.traccar.web.client.model.DataService;
+import org.traccar.web.shared.model.Device;
+import org.traccar.web.shared.model.Position;
+import org.traccar.web.shared.model.User;
+
+import com.google.gwt.user.server.rpc.RemoteServiceServlet;
+
+public class DataServiceImpl extends RemoteServiceServlet implements DataService {
+
+    private static final long serialVersionUID = 1;
+
+    private static final String PERSISTENCE_DATASTORE = "java:/DefaultDS";
+    private static final String PERSISTENCE_UNIT_DEBUG = "debug";
+    private static final String PERSISTENCE_UNIT_RELEASE = "release";
+    private static final String ATTRIBUTE_USER = "user";
+
+    private EntityManager entityManager;
+
+    @Override
+    public void init() throws ServletException {
+        super.init();
+
+        String persistenceUnit;
+        try {
+            Context context = new InitialContext();
+            context.lookup(PERSISTENCE_DATASTORE);
+            persistenceUnit = PERSISTENCE_UNIT_RELEASE;
+        } catch (NamingException e) {
+            persistenceUnit = PERSISTENCE_UNIT_DEBUG;
+        }
+
+        entityManager = Persistence.createEntityManagerFactory(persistenceUnit).createEntityManager();
+    }
+
+    @Override
+    public void destroy() {
+        entityManager.close();
+        super.destroy();
+    }
+
+    private void setUser(User user) {
+        HttpSession session = getThreadLocalRequest().getSession();
+        session.setAttribute(ATTRIBUTE_USER, user);
+    }
+
+    private User getUser() {
+        HttpSession session = getThreadLocalRequest().getSession();
+        return (User) session.getAttribute(ATTRIBUTE_USER);
+    }
+
+    @Override
+    public boolean authenticated() {
+        return (getUser() != null);
+    }
+
+    @Override
+    public boolean authenticate(String login, String password) {
+        TypedQuery<User> query = entityManager.createQuery(
+                "SELECT x FROM User x WHERE x.login = :login", User.class);
+        query.setParameter("login", login);
+        List<User> results = query.getResultList();
+
+        if (!results.isEmpty() && password.equals(results.get(0).getPassword())) {
+            setUser(results.get(0));
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public boolean register(String login, String password) {
+        User user = new User();
+        user.setLogin(login);
+        user.setPassword(password);
+        entityManager.getTransaction().begin();
+        try {
+            entityManager.persist(user);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        setUser(user);
+        return true;
+    }
+
+    @Override
+    public List<Device> getDevices() {
+        User user = getUser();
+        List<Device> devices = new LinkedList<Device>();
+        devices.addAll(user.getDevices());
+        return devices;
+    }
+
+    @Override
+    public Device addDevice(Device device) {
+        User user = getUser();
+        entityManager.getTransaction().begin();
+        try {
+            entityManager.persist(device);
+            user.getDevices().add(device);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        return device;
+    }
+
+    @Override
+    public Device updateDevice(Device device) {
+        entityManager.getTransaction().begin();
+        try {
+            device = entityManager.merge(device);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        return device;
+    }
+
+    @Override
+    public Device removeDevice(Device device) {
+        User user = getUser();
+        entityManager.getTransaction().begin();
+        try {
+            device = entityManager.merge(device);
+            user.getDevices().remove(device);
+            entityManager.remove(device);
+        } finally {
+            entityManager.getTransaction().commit();
+        }
+        return device;
+    }
+
+    @Override
+    public List<Position> getPositions(Device device, Date from, Date to) {
+        List<Position> positions = new LinkedList<Position>();
+        TypedQuery<Position> query = entityManager.createQuery(
+                "SELECT x FROM Position x WHERE x.device = :device AND x.time BETWEEN :from AND :to", Position.class);
+        query.setParameter("device", device);
+        query.setParameter("from", from);
+        query.setParameter("to", to);
+        positions.addAll(query.getResultList());
+        return positions;
+    }
+
+    @Override
+    public List<Position> getLatestPositions() {
+        List<Position> positions = new LinkedList<Position>();
+        User user = getUser();
+        if (!user.getDevices().isEmpty()) {
+            TypedQuery<Position> query = entityManager.createQuery(
+                    "SELECT x FROM Position x WHERE (x.device, x.time) IN (" +
+                            "SELECT y.device, MAX(y.time) FROM Position y WHERE y.device IN :devices GROUP BY y.device)", Position.class);
+            query.setParameter("devices", user.getDevices());
+            positions.addAll(query.getResultList());
+        }
+        return positions;
+    }
+
+}
-- 
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