2 files changed, 106 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/schedule/ScheduleManager.java b/src/main/java/org/traccar/schedule/ScheduleManager.java
new file mode 100644
index 000000000..3f19d6152
--- /dev/null
+++ b/src/main/java/org/traccar/schedule/ScheduleManager.java
@@ -0,0 +1,27 @@
+package org.traccar.schedule;
+
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+
+public class ScheduleManager {
+
+    private ScheduledExecutorService executor;
+
+    public void start() {
+
+        executor = Executors.newSingleThreadScheduledExecutor();
+
+        new TaskDeviceInactivityCheck().schedule(executor);
+
+    }
+
+    public void stop() {
+
+        if (executor != null) {
+            executor.shutdown();
+            executor = null;
+        }
+
+    }
+
+}
diff --git a/src/main/java/org/traccar/schedule/TaskDeviceInactivityCheck.java b/src/main/java/org/traccar/schedule/TaskDeviceInactivityCheck.java
new file mode 100644
index 000000000..80641d7d4
--- /dev/null
+++ b/src/main/java/org/traccar/schedule/TaskDeviceInactivityCheck.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2020 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.schedule;
+
+import org.traccar.Context;
+import org.traccar.model.Device;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+public class TaskDeviceInactivityCheck implements Runnable {
+
+    public static final String ATTRIBUTE_DEVICE_INACTIVITY_START = "deviceInactivityStart";
+    public static final String ATTRIBUTE_DEVICE_INACTIVITY_PERIOD = "deviceInactivityPeriod";
+    public static final String ATTRIBUTE_LAST_UPDATE = "lastUpdate";
+
+    private static final long CHECK_PERIOD_MINUTES = 15;
+
+    public void schedule(ScheduledExecutorService executor) {
+        executor.scheduleAtFixedRate(this, CHECK_PERIOD_MINUTES, CHECK_PERIOD_MINUTES, TimeUnit.MINUTES);
+    }
+
+    @Override
+    public void run() {
+        long currentTime = System.currentTimeMillis();
+        long checkPeriod = TimeUnit.MINUTES.toMillis(CHECK_PERIOD_MINUTES);
+
+        Map<Event, Position> events = new HashMap<>();
+        for (Device device : Context.getDeviceManager().getAllDevices()) {
+            if (device.getLastUpdate() != null && checkDevice(device, currentTime, checkPeriod)) {
+                Event event = new Event(Event.TYPE_DEVICE_INACTIVE, device.getId());
+                event.set(ATTRIBUTE_LAST_UPDATE, device.getLastUpdate().getTime());
+                events.put(event, null);
+            }
+        }
+
+        Context.getNotificationManager().updateEvents(events);
+    }
+
+    private boolean checkDevice(Device device, long currentTime, long checkPeriod) {
+        long deviceInactivityStart = device.getLong(ATTRIBUTE_DEVICE_INACTIVITY_START);
+        if (deviceInactivityStart > 0) {
+            long timeThreshold = device.getLastUpdate().getTime() + deviceInactivityStart;
+            if (currentTime >= timeThreshold) {
+
+                if (currentTime - checkPeriod < timeThreshold) {
+                    return true;
+                }
+
+                long deviceInactivityPeriod = device.getLong(ATTRIBUTE_DEVICE_INACTIVITY_PERIOD);
+                if (deviceInactivityPeriod > 0) {
+                    long count = (currentTime - timeThreshold - 1) / deviceInactivityPeriod;
+                    timeThreshold += count * deviceInactivityPeriod;
+                    return currentTime - checkPeriod < timeThreshold;
+                }
+
+            }
+        }
+        return false;
+    }
+
+}