Reduce config save spam from recorder operations (400ms delay)

common/src/main/java/ctbrec/recorder/SimplifiedLocalRecorder.java

@@ -30,6 +30,7 @@ import java.util.*;
 import java.util.concurrent.*;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.stream.Collectors;
+
 import com.google.common.collect.Ordering;
 
 import static ctbrec.Recording.State.WAITING;
@@ -64,6 +65,9 @@ public class SimplifiedLocalRecorder implements Recorder {
     private final Thread maintenanceThread;
     private long lastSpaceCheck;
     
+    Timer saveConfigTimer = new Timer();
+    TimerTask saveConfigTask = null;
+    
 
     public SimplifiedLocalRecorder(Config config, List<Site> sites) throws IOException {
         this.config = config;
@@ -553,16 +557,30 @@ public class SimplifiedLocalRecorder implements Recorder {
             }
 
             getRecordingProcessForModel(model).ifPresent(this::stopRecordingProcess);
-        } catch (IOException e) {
-            errorSavingConfig(e);
         } finally {
             recorderLock.unlock();
         }
     }
 
-    private void saveConfig() throws IOException {
+    private void saveConfig() {        
-        config.getSettings().models = models.stream().map(Mappers.getMapper(ModelMapper.class)::toDto).collect(Collectors.toList());
+        if (saveConfigTask != null)
-        config.save();
+            saveConfigTask.cancel();
+           
+        saveConfigTask = new TimerTask() {
+            @Override
+            public void run() {
+                recorderLock.lock();
+                try {
+                    config.getSettings().models = models.stream().map(Mappers.getMapper(ModelMapper.class)::toDto).collect(Collectors.toList());
+                    config.save();
+                } catch (IOException e) {
+                    errorSavingConfig(e);
+                } finally {
+                    recorderLock.unlock();
+                }
+            }
+        };
+        saveConfigTimer.schedule(saveConfigTask, 400);
     }
 
     @Override
@@ -622,8 +640,6 @@ public class SimplifiedLocalRecorder implements Recorder {
             }
 
             getRecordingProcessForModel(model).ifPresent(this::stopRecordingProcess);
-        } catch (IOException e) {
-            errorSavingConfig(e);
         } finally {
             recorderLock.unlock();
         }
@@ -901,8 +917,6 @@ public class SimplifiedLocalRecorder implements Recorder {
             } else {
                 log.warn("Couldn't change priority for model {}. Not found in list", model.getName());
             }
-        } catch (IOException e) {
-            errorSavingConfig(e);
         } finally {
             recorderLock.unlock();
         }