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Diffstat (limited to 'src/org/traccar/database/DataCache.java')
-rw-r--r--src/org/traccar/database/DataCache.java21
1 files changed, 18 insertions, 3 deletions
diff --git a/src/org/traccar/database/DataCache.java b/src/org/traccar/database/DataCache.java
index f5aa3b1e9..f28f1b838 100644
--- a/src/org/traccar/database/DataCache.java
+++ b/src/org/traccar/database/DataCache.java
@@ -18,6 +18,8 @@ package org.traccar.database;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
import java.util.Map;
import java.util.Set;
import org.traccar.model.Position;
@@ -31,7 +33,7 @@ public class DataCache {
// TODO: load latest data from datavase
}
- public void update(Position position) {
+ public synchronized void update(Position position) {
long device = position.getDeviceId();
positions.put(device, position);
if (listeners.containsKey(device)) {
@@ -41,6 +43,19 @@ public class DataCache {
}
}
+ public synchronized Collection<Position> getInitialState(Collection<Long> devices) {
+
+ List<Position> result = new LinkedList<Position>();
+
+ for (long device : devices) {
+ if (positions.containsKey(device)) {
+ result.add(positions.get(device));
+ }
+ }
+
+ return result;
+ }
+
public static interface DataCacheListener {
public void onUpdate(Position position);
}
@@ -51,7 +66,7 @@ public class DataCache {
}
}
- public void addListener(long device, DataCacheListener listener) {
+ public synchronized void addListener(long device, DataCacheListener listener) {
if (!listeners.containsKey(device)) {
listeners.put(device, new HashSet<DataCacheListener>());
}
@@ -64,7 +79,7 @@ public class DataCache {
}
}
- public void removeListener(long device, DataCacheListener listener) {
+ public synchronized void removeListener(long device, DataCacheListener listener) {
if (!listeners.containsKey(device)) {
listeners.put(device, new HashSet<DataCacheListener>());
}