fixed zones in SchedulerUtils and ApiUsageStateService improvements

@@ -61,6 +61,7 @@ import org.thingsboard.server.service.telemetry.InternalTelemetryService;
 import javax.annotation.PostConstruct;
 import javax.annotation.PreDestroy;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
@@ -73,6 +74,7 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
+import java.util.stream.Collectors;
 
 @Slf4j
 @Service
@@ -347,16 +349,11 @@ public class DefaultTbApiUsageStateService implements TbApiUsageStateService {
         try {
             long now = System.currentTimeMillis();
             myTenantStates.values().forEach(state -> {
-                if ((state.getNextCycleTs() > now) && (state.getNextCycleTs() - now < TimeUnit.HOURS.toMillis(1))) {
+                if ((state.getNextCycleTs() < now) && (now - state.getNextCycleTs() < TimeUnit.HOURS.toMillis(1))) {
                     TenantId tenantId = state.getTenantId();
                     state.setCycles(state.getNextCycleTs(), SchedulerUtils.getStartOfNextNextMonth());
-                    ToUsageStatsServiceMsg.Builder msg = ToUsageStatsServiceMsg.newBuilder();
-                    msg.setTenantIdMSB(tenantId.getId().getMostSignificantBits());
-                    msg.setTenantIdLSB(tenantId.getId().getLeastSignificantBits());
-                    for (ApiUsageRecordKey key : ApiUsageRecordKey.values()) {
-                        msg.addValues(UsageStatsKVProto.newBuilder().setKey(key.name()).setValue(0).build());
-                    }
-                    process(new TbProtoQueueMsg<>(UUID.randomUUID(), msg.build()), TbCallback.EMPTY);
+                    saveNewCounts(state, Arrays.asList(ApiUsageRecordKey.values()));
+                    updateTenantState(state, tenantProfileCache.get(tenantId));
                 }
             });
         } finally {
@@ -364,6 +361,14 @@ public class DefaultTbApiUsageStateService implements TbApiUsageStateService {
         }
     }
 
+    private void saveNewCounts(TenantApiUsageState state, List<ApiUsageRecordKey> keys) {
+        List<TsKvEntry> counts = keys.stream()
+                .map(key -> new BasicTsKvEntry(state.getCurrentCycleTs(), new LongDataEntry(key.getApiCountKey(), 0L)))
+                .collect(Collectors.toList());
+
+        tsWsService.saveAndNotifyInternal(state.getTenantId(), state.getApiUsageState().getId(), counts, VOID_CALLBACK);
+    }
+
     private TenantApiUsageState getOrFetchState(TenantId tenantId) {
         TenantApiUsageState tenantState = myTenantStates.get(tenantId);
         if (tenantState == null) {
@@ -377,6 +382,7 @@ public class DefaultTbApiUsageStateService implements TbApiUsageStateService {
             }
             TenantProfile tenantProfile = tenantProfileCache.get(tenantId);
             tenantState = new TenantApiUsageState(tenantProfile, dbStateEntity);
+            List<ApiUsageRecordKey> newCounts = new ArrayList<>();
             try {
                 List<TsKvEntry> dbValues = tsService.findAllLatest(tenantId, dbStateEntity.getId()).get();
                 for (ApiUsageRecordKey key : ApiUsageRecordKey.values()) {
@@ -385,7 +391,13 @@ public class DefaultTbApiUsageStateService implements TbApiUsageStateService {
                     for (TsKvEntry tsKvEntry : dbValues) {
                         if (tsKvEntry.getKey().equals(key.getApiCountKey())) {
                             cycleEntryFound = true;
-                            tenantState.put(key, tsKvEntry.getTs() == tenantState.getCurrentCycleTs() ? tsKvEntry.getLongValue().get() : 0L);
+
+                            boolean oldCount = tsKvEntry.getTs() == tenantState.getCurrentCycleTs();
+                            tenantState.put(key, oldCount ? tsKvEntry.getLongValue().get() : 0L);
+
+                            if (!oldCount) {
+                                newCounts.add(key);
+                            }
                         } else if (tsKvEntry.getKey().equals(key.getApiCountKey() + HOURLY)) {
                             hourlyEntryFound = true;
                             tenantState.putHourly(key, tsKvEntry.getTs() == tenantState.getCurrentHourTs() ? tsKvEntry.getLongValue().get() : 0L);
@@ -397,6 +409,7 @@ public class DefaultTbApiUsageStateService implements TbApiUsageStateService {
                 }
                 log.debug("[{}] Initialized state: {}", tenantId, dbStateEntity);
                 myTenantStates.put(tenantId, tenantState);
+                saveNewCounts(tenantState, newCounts);
             } catch (InterruptedException | ExecutionException e) {
                 log.warn("[{}] Failed to fetch api usage state from db.", tenantId, e);
             }

@@ -17,22 +17,19 @@ package org.thingsboard.server.common.msg.tools;
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
-import java.time.LocalTime;
 import java.time.ZoneId;
-import java.time.ZoneOffset;
 import java.time.temporal.ChronoUnit;
 import java.time.temporal.TemporalAdjuster;
 import java.time.temporal.TemporalAdjusters;
-import java.time.temporal.TemporalUnit;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
+import static java.time.ZoneOffset.UTC;
 import static java.time.temporal.ChronoField.DAY_OF_MONTH;
 import static java.time.temporal.ChronoUnit.MONTHS;
 
 public class SchedulerUtils {
 
-    private final static ZoneId UTC = ZoneId.of("UTC");
     private static final ConcurrentMap<String, ZoneId> tzMap = new ConcurrentHashMap<>();
 
     public static ZoneId getZoneId(String tz) {
@@ -44,7 +41,7 @@ public class SchedulerUtils {
     }
 
     public static long getStartOfCurrentHour(ZoneId zoneId) {
-        return LocalDateTime.now(ZoneOffset.UTC).atZone(zoneId).truncatedTo(ChronoUnit.HOURS).toInstant().toEpochMilli();
+        return LocalDateTime.now(UTC).atZone(zoneId).truncatedTo(ChronoUnit.HOURS).toInstant().toEpochMilli();
     }
 
     public static long getStartOfCurrentMonth() {
@@ -52,7 +49,7 @@ public class SchedulerUtils {
     }
 
     public static long getStartOfCurrentMonth(ZoneId zoneId) {
-        return LocalDate.now().withDayOfMonth(1).atStartOfDay(zoneId).toInstant().toEpochMilli();
+        return LocalDate.now(UTC).withDayOfMonth(1).atStartOfDay(zoneId).toInstant().toEpochMilli();
     }
 
     public static long getStartOfNextMonth() {
@@ -60,7 +57,7 @@ public class SchedulerUtils {
     }
 
     public static long getStartOfNextMonth(ZoneId zoneId) {
-        return LocalDate.now().with(TemporalAdjusters.firstDayOfNextMonth()).atStartOfDay(zoneId).toInstant().toEpochMilli();
+        return LocalDate.now(UTC).with(TemporalAdjusters.firstDayOfNextMonth()).atStartOfDay(zoneId).toInstant().toEpochMilli();
     }
 
     public static long getStartOfNextNextMonth() {
@@ -68,7 +65,7 @@ public class SchedulerUtils {
     }
 
     public static long getStartOfNextNextMonth(ZoneId zoneId) {
-        return LocalDate.now().with(firstDayOfNextNextMonth()).atStartOfDay(zoneId).toInstant().toEpochMilli();
+        return LocalDate.now(UTC).with(firstDayOfNextNextMonth()).atStartOfDay(zoneId).toInstant().toEpochMilli();
     }
 
     public static TemporalAdjuster firstDayOfNextNextMonth() {