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diff --git a/src/org/traccar/database/StatisticsManager.java b/src/org/traccar/database/StatisticsManager.java
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+/*
+ * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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.database;
+
+import org.traccar.Context;
+import org.traccar.helper.Log;
+import org.traccar.model.Statistics;
+
+import java.sql.SQLException;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.HashSet;
+import java.util.Set;
+
+public class StatisticsManager {
+
+ private static final int SPLIT_MODE = Calendar.MINUTE;
+
+ private int lastUpdate = Calendar.getInstance().get(SPLIT_MODE);
+
+ private Set<Long> users = new HashSet<>();
+ private Set<Long> devices = new HashSet<>();
+
+ private int requests;
+ private int messagesReceived;
+ private int messagesStored;
+
+ private void checkSplit() {
+ int currentUpdate = Calendar.getInstance().get(SPLIT_MODE);
+ if (lastUpdate != currentUpdate) {
+ Statistics statistics = new Statistics();
+ statistics.setCaptureTime(new Date());
+ statistics.setActiveUsers(users.size());
+ statistics.setActiveDevices(devices.size());
+ statistics.setRequests(requests);
+ statistics.setMessagesReceived(messagesReceived);
+ statistics.setMessagesStored(messagesStored);
+
+ try {
+ Context.getDataManager().addStatistics(statistics);
+ } catch (SQLException e) {
+ Log.warning(e);
+ }
+
+ users.clear();
+ devices.clear();
+ requests = 0;
+ messagesReceived = 0;
+ messagesStored = 0;
+ lastUpdate = currentUpdate;
+ }
+ }
+
+ public synchronized void registerUser(long userId) {
+ checkSplit();
+ users.add(userId);
+ }
+
+ public synchronized void registerDevice(long deviceId) {
+ checkSplit();
+ devices.add(deviceId);
+ }
+
+ public synchronized void registerRequest() {
+ checkSplit();
+ requests += 1;
+ }
+
+ public synchronized void registerMessageReceived() {
+ checkSplit();
+ messagesReceived += 1;
+ }
+
+ public synchronized void registerMessageStored() {
+ checkSplit();
+ messagesStored += 1;
+ }
+
+}