From 451c358879e1f6f2fda26e4b85ef97982fbeaba5 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Mon, 25 Jul 2016 16:49:08 +1200
Subject: Improve history clearing logic

---
 debug.xml                                 |  4 ++--
 src/org/traccar/Main.java                 |  9 ++++-----
 src/org/traccar/database/DataManager.java | 27 +++++----------------------
 3 files changed, 11 insertions(+), 29 deletions(-)

diff --git a/debug.xml b/debug.xml
index 346eda292..304ae7f3d 100644
--- a/debug.xml
+++ b/debug.xml
@@ -323,8 +323,8 @@
         DELETE FROM notifications WHERE id = :id;
     </entry>
 
-    <entry key='database.clearPositionsHistory'>
-        DELETE FROM positions WHERE id != :positionId and deviceid = :deviceId and servertime &lt; :serverTime;
+    <entry key='database.deletePositions'>
+        DELETE FROM positions WHERE serverTime &lt; :serverTime AND id NOT IN (SELECT positionId FROM devices);
     </entry>
 
     <!-- PROTOCOL CONFIG -->
diff --git a/src/org/traccar/Main.java b/src/org/traccar/Main.java
index e7e8d8ab9..e992691ad 100644
--- a/src/org/traccar/Main.java
+++ b/src/org/traccar/Main.java
@@ -23,8 +23,8 @@ import java.util.TimerTask;
 import java.util.Locale;
 
 public final class Main {
-    static final long CLEAN_DELAY = 0;
-    static final long CLEAN_PERIOD = 24 * 60 * 60 * 1000;
+
+    private static final long CLEAN_PERIOD = 24 * 60 * 60 * 1000;
 
     private Main() {
     }
@@ -40,8 +40,7 @@ public final class Main {
             Context.getWebServer().start();
         }
 
-        Timer timer = new Timer();
-        timer.scheduleAtFixedRate(new TimerTask() {
+        new Timer().scheduleAtFixedRate(new TimerTask() {
             @Override
             public void run() {
                 try {
@@ -50,7 +49,7 @@ public final class Main {
                     Log.warning(error);
                 }
             }
-        }, CLEAN_DELAY, CLEAN_PERIOD);
+        }, 0, CLEAN_PERIOD);
 
         Runtime.getRuntime().addShutdownHook(new Thread() {
             @Override
diff --git a/src/org/traccar/database/DataManager.java b/src/org/traccar/database/DataManager.java
index 04d0d44ea..78f1b4109 100644
--- a/src/org/traccar/database/DataManager.java
+++ b/src/org/traccar/database/DataManager.java
@@ -305,28 +305,11 @@ public class DataManager {
     }
 
     public void clearPositionsHistory() throws SQLException {
-        int histDays = config.getInteger("database.positionsHistoryDays");
-        if (histDays == 0) {
-            return;
-        }
-
-        String sql = getQuery("database.clearPositionsHistory");
-        if (sql == null) {
-            return;
-        }
-
-        for (Device device : getAllDevices()) {
-            Date lastUpdate = device.getLastUpdate();
-            if (lastUpdate != null) {
-
-                Date dateBefore = new Date(lastUpdate.getTime() - histDays * 24 * 3600 * 1000);
-
-                QueryBuilder.create(dataSource, sql)
-                        .setLong("positionId", device.getPositionId())
-                        .setLong("deviceId", device.getId())
-                        .setDate("serverTime", dateBefore)
-                        .executeUpdate();
-            }
+        int historyDays = config.getInteger("database.positionsHistoryDays");
+        if (historyDays != 0) {
+            QueryBuilder.create(dataSource, getQuery("database.deletePositions"))
+                    .setDate("serverTime", new Date(System.currentTimeMillis() - historyDays * 24 * 3600 * 1000))
+                    .executeUpdate();
         }
     }
 
-- 
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