Initial WebSocker API

application/src/main/java/org/thingsboard/server/service/subscription/DefaultTbEntityDataSubscriptionService.java

@@ -49,6 +49,7 @@ import org.thingsboard.server.dao.timeseries.TimeseriesService;
 import org.thingsboard.server.queue.discovery.ClusterTopologyChangeEvent;
 import org.thingsboard.server.queue.discovery.PartitionChangeEvent;
 import org.thingsboard.server.queue.discovery.PartitionService;
+import org.thingsboard.server.queue.discovery.TbServiceInfoProvider;
 import org.thingsboard.server.queue.util.TbCoreComponent;
 import org.thingsboard.server.service.queue.TbClusterService;
 import org.thingsboard.server.service.telemetry.TelemetryWebSocketService;
@@ -105,19 +106,29 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
     @Lazy
     private SubscriptionManagerService subscriptionManagerService;
 
+    @Autowired
+    @Lazy
+    private TbLocalSubscriptionService localSubscriptionService;
+
     @Autowired
     private TimeseriesService tsService;
 
+    @Autowired
+    private TbServiceInfoProvider serviceInfoProvider;
+
     @Value("${database.ts.type}")
     private String databaseTsType;
 
     private ExecutorService wsCallBackExecutor;
     private boolean tsInSqlDB;
+    private String serviceId;
 
     @PostConstruct
     public void initExecutor() {
+        serviceId = serviceInfoProvider.getServiceId();
         wsCallBackExecutor = Executors.newSingleThreadExecutor(ThingsBoardThreadFactory.forName("ws-entity-sub-callback"));
         tsInSqlDB = databaseTsType.equalsIgnoreCase("sql") || databaseTsType.equalsIgnoreCase("timescale");
+
     }
 
     @PreDestroy
@@ -158,6 +169,9 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
         TbEntityDataSubCtx ctx = getSubCtx(session.getSessionId(), cmd.getCmdId());
         if (ctx != null) {
             log.debug("[{}][{}] Updating existing subscriptions using: {}", session.getSessionId(), cmd.getCmdId(), cmd);
+            if (cmd.getLatestCmd() != null || cmd.getTsCmd() != null) {
+                ctx.clearSubscriptions();
+            }
             //TODO: cleanup old subscription;
         } else {
             log.debug("[{}][{}] Creating new subscription using: {}", session.getSessionId(), cmd.getCmdId(), cmd);
@@ -209,7 +223,7 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
 
     private TbEntityDataSubCtx createSubCtx(TelemetryWebSocketSessionRef sessionRef, EntityDataCmd cmd) {
         Map<Integer, TbEntityDataSubCtx> sessionSubs = subscriptionsBySessionId.computeIfAbsent(sessionRef.getSessionId(), k -> new HashMap<>());
-        TbEntityDataSubCtx ctx = new TbEntityDataSubCtx(sessionRef, cmd.getCmdId());
+        TbEntityDataSubCtx ctx = new TbEntityDataSubCtx(serviceId, wsService, sessionRef, cmd.getCmdId());
         ctx.setQuery(cmd.getQuery());
         sessionSubs.put(cmd.getCmdId(), ctx);
         return ctx;
@@ -266,7 +280,7 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
                         update = new EntityDataUpdate(ctx.getCmdId(), null, ctx.getData().getData());
                     }
                     wsService.sendWsMsg(ctx.getSessionId(), update);
-                    //TODO: create context for this (session, cmdId) that contains query, latestCmd and update. Subscribe + periodic updates.
+                    createLatestSubscriptions(ctx, latestCmd);
                 }
 
                 @Override
@@ -281,10 +295,16 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
                 EntityDataUpdate update = new EntityDataUpdate(ctx.getCmdId(), ctx.getData(), null);
                 wsService.sendWsMsg(ctx.getSessionId(), update);
             }
-            //TODO: create context for this (session, cmdId) that contains query, latestCmd and update. Subscribe + periodic updates.
+            createLatestSubscriptions(ctx, latestCmd);
         }
     }
 
+    private void createLatestSubscriptions(TbEntityDataSubCtx ctx, LatestValueCmd latestCmd) {
+        //TODO: create context for this (session, cmdId) that contains query, latestCmd and update. Subscribe + periodic updates.
+        List<TbSubscription> tbSubs = ctx.createSubscriptions(latestCmd.getKeys());
+        tbSubs.forEach(sub -> localSubscriptionService.addSubscription(sub));
+    }
+
     private Map<String, TsValue> toTsValue(List<TsKvEntry> data) {
         return data.stream().collect(Collectors.toMap(TsKvEntry::getKey, value -> new TsValue(value.getTs(), value.getValueAsString())));
     }

application/src/main/java/org/thingsboard/server/service/subscription/DefaultTbLocalSubscriptionService.java

@@ -5,7 +5,7 @@
  * 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
+ * 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,
@@ -58,9 +58,6 @@ public class DefaultTbLocalSubscriptionService implements TbLocalSubscriptionSer
     private final Set<TopicPartitionInfo> currentPartitions = ConcurrentHashMap.newKeySet();
     private final Map<String, Map<Integer, TbSubscription>> subscriptionsBySessionId = new ConcurrentHashMap<>();
 
-    @Autowired
-    private TelemetryWebSocketService wsService;
-
     @Autowired
     private EntityViewService entityViewService;
 
@@ -155,7 +152,7 @@ public class DefaultTbLocalSubscriptionService implements TbLocalSubscriptionSer
                     update.getLatestValues().forEach((key, value) -> attrSub.getKeyStates().put(key, value));
                     break;
             }
-            wsService.sendWsMsg(sessionId, update);
+            subscription.getUpdateConsumer().accept(sessionId, update);
         }
         callback.onSuccess();
     }

application/src/main/java/org/thingsboard/server/service/subscription/TbAttributeSubscription.java

@@ -20,8 +20,10 @@ import lombok.Data;
 import lombok.Getter;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.service.telemetry.sub.SubscriptionUpdate;
 
 import java.util.Map;
+import java.util.function.BiConsumer;
 
 public class TbAttributeSubscription extends TbSubscription {
 
@@ -31,8 +33,9 @@ public class TbAttributeSubscription extends TbSubscription {
 
     @Builder
     public TbAttributeSubscription(String serviceId, String sessionId, int subscriptionId, TenantId tenantId, EntityId entityId,
+                                   BiConsumer<String, SubscriptionUpdate> updateConsumer,
                                    boolean allKeys, Map<String, Long> keyStates, TbAttributeSubscriptionScope scope) {
-        super(serviceId, sessionId, subscriptionId, tenantId, entityId, TbSubscriptionType.ATTRIBUTES);
+        super(serviceId, sessionId, subscriptionId, tenantId, entityId, TbSubscriptionType.ATTRIBUTES, updateConsumer);
         this.allKeys = allKeys;
         this.keyStates = keyStates;
         this.scope = scope;

application/src/main/java/org/thingsboard/server/service/subscription/TbEntityDataSubCtx.java

@@ -2,17 +2,35 @@ package org.thingsboard.server.service.subscription;
 
 import lombok.Data;
 import org.thingsboard.server.common.data.id.CustomerId;
+import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.query.EntityData;
 import org.thingsboard.server.common.data.query.EntityDataQuery;
+import org.thingsboard.server.common.data.query.EntityKey;
+import org.thingsboard.server.common.data.query.EntityKeyType;
+import org.thingsboard.server.common.data.query.TsValue;
+import org.thingsboard.server.service.telemetry.TelemetryWebSocketService;
 import org.thingsboard.server.service.telemetry.TelemetryWebSocketSessionRef;
+import org.thingsboard.server.service.telemetry.cmd.v2.EntityDataUpdate;
 import org.thingsboard.server.service.telemetry.cmd.v2.LatestValueCmd;
 import org.thingsboard.server.service.telemetry.cmd.v2.TimeSeriesCmd;
+import org.thingsboard.server.service.telemetry.sub.SubscriptionUpdate;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
 
 @Data
 public class TbEntityDataSubCtx {
 
+    public static final int MAX_SUBS_PER_CMD = 1024 * 8;
+    private final String serviceId;
+    private final TelemetryWebSocketService wsService;
     private final TelemetryWebSocketSessionRef sessionRef;
     private final int cmdId;
     private EntityDataQuery query;
@@ -20,8 +38,13 @@ public class TbEntityDataSubCtx {
     private TimeSeriesCmd tsCmd;
     private PageData<EntityData> data;
     private boolean initialDataSent;
+    private List<TbSubscription> tbSubs;
+    private int internalSubIdx;
+    private Map<Integer, EntityId> subToEntityIdMap;
 
-    public TbEntityDataSubCtx(TelemetryWebSocketSessionRef sessionRef, int cmdId) {
+    public TbEntityDataSubCtx(String serviceId, TelemetryWebSocketService wsService, TelemetryWebSocketSessionRef sessionRef, int cmdId) {
+        this.serviceId = serviceId;
+        this.wsService = wsService;
         this.sessionRef = sessionRef;
         this.cmdId = cmdId;
     }
@@ -38,9 +61,79 @@ public class TbEntityDataSubCtx {
         return sessionRef.getSecurityCtx().getCustomerId();
     }
 
-
     public void setData(PageData<EntityData> data) {
         this.data = data;
     }
 
+    public List<TbSubscription> createSubscriptions(List<EntityKey> keys) {
+        this.subToEntityIdMap = new HashMap<>();
+        this.internalSubIdx = cmdId * MAX_SUBS_PER_CMD;
+        tbSubs = new ArrayList<>();
+        List<EntityKey> attrSubKeys = new ArrayList<>();
+        List<EntityKey> tsSubKeys = new ArrayList<>();
+        for (EntityKey key : keys) {
+            switch (key.getType()) {
+                case TIME_SERIES:
+                    tsSubKeys.add(key);
+                    break;
+                case ATTRIBUTE:
+                case CLIENT_ATTRIBUTE:
+                case SHARED_ATTRIBUTE:
+                case SERVER_ATTRIBUTE:
+                    attrSubKeys.add(key);
+            }
+        }
+        for (EntityData entityData : data.getData()) {
+            if (!tsSubKeys.isEmpty()) {
+                tbSubs.add(createTsSub(entityData, tsSubKeys));
+            }
+        }
+        return tbSubs;
+    }
+
+    private TbSubscription createTsSub(EntityData entityData, List<EntityKey> tsSubKeys) {
+        int subIdx = internalSubIdx++;
+        subToEntityIdMap.put(subIdx, entityData.getEntityId());
+        Map<String, Long> keyStates = new HashMap<>();
+        tsSubKeys.forEach(key -> keyStates.put(key.getKey(), 0L));
+        if (entityData.getLatest() != null) {
+            Map<String, TsValue> currentValues = entityData.getLatest().get(EntityKeyType.TIME_SERIES);
+            if (currentValues != null) {
+                currentValues.forEach((k, v) -> keyStates.put(k, v.getTs()));
+            }
+        }
+        if (entityData.getTimeseries() != null) {
+            entityData.getTimeseries().forEach((k, v) -> keyStates.put(k, Arrays.stream(v).map(TsValue::getTs).max(Long::compareTo).orElse(0L)));
+        }
+
+        return TbTimeseriesSubscription.builder()
+                .serviceId(serviceId)
+                .sessionId(sessionRef.getSessionId())
+                .subscriptionId(subIdx)
+                .tenantId(sessionRef.getSecurityCtx().getTenantId())
+                .entityId(entityData.getEntityId())
+                .updateConsumer(this::sendTsWsMsg)
+                .allKeys(false)
+                .keyStates(keyStates).build();
+    }
+
+
+    private void sendTsWsMsg(String sessionId, SubscriptionUpdate subscriptionUpdate) {
+        EntityId entityId = subToEntityIdMap.get(subscriptionUpdate.getSubscriptionId());
+        if (entityId != null) {
+            Map<String, TsValue> latest = new HashMap<>();
+            subscriptionUpdate.getData().forEach((k, v) -> {
+                Object[] data = (Object[]) v.get(0);
+                latest.put(k, new TsValue((Long) data[0], (String) data[1]));
+            });
+            Map<EntityKeyType, Map<String, TsValue>> latestMap = Collections.singletonMap(EntityKeyType.TIME_SERIES, latest);
+            EntityData entityData = new EntityData(entityId, latestMap, null);
+            wsService.sendWsMsg(sessionId, new EntityDataUpdate(cmdId, null, Collections.singletonList(entityData)));
+        }
+
+    }
+
+    public void clearSubscriptions() {
+        subToEntityIdMap.clear();
+    }
 }

application/src/main/java/org/thingsboard/server/service/subscription/TbSubscription.java

@@ -19,8 +19,10 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.service.telemetry.sub.SubscriptionUpdate;
 
 import java.util.Objects;
+import java.util.function.BiConsumer;
 
 @Data
 @AllArgsConstructor
@@ -32,6 +34,7 @@ public abstract class TbSubscription {
     private final TenantId tenantId;
     private final EntityId entityId;
     private final TbSubscriptionType type;
+    private final BiConsumer<String, SubscriptionUpdate> updateConsumer;
 
     @Override
     public boolean equals(Object o) {

application/src/main/java/org/thingsboard/server/service/subscription/TbTimeseriesSubscription.java

@@ -5,7 +5,7 @@
  * 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
+ * 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,
@@ -19,20 +19,27 @@ import lombok.Builder;
 import lombok.Getter;
 import org.thingsboard.server.common.data.id.EntityId;
 import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.service.telemetry.sub.SubscriptionUpdate;
 
 import java.util.Map;
+import java.util.function.BiConsumer;
 
 public class TbTimeseriesSubscription extends TbSubscription {
 
-    @Getter private final boolean allKeys;
-    @Getter private final Map<String, Long> keyStates;
-    @Getter private final long startTime;
-    @Getter private final long endTime;
+    @Getter
+    private final boolean allKeys;
+    @Getter
+    private final Map<String, Long> keyStates;
+    @Getter
+    private final long startTime;
+    @Getter
+    private final long endTime;
 
     @Builder
     public TbTimeseriesSubscription(String serviceId, String sessionId, int subscriptionId, TenantId tenantId, EntityId entityId,
+                                    BiConsumer<String, SubscriptionUpdate> updateConsumer,
                                     boolean allKeys, Map<String, Long> keyStates, long startTime, long endTime) {
-        super(serviceId, sessionId, subscriptionId, tenantId, entityId, TbSubscriptionType.TIMESERIES);
+        super(serviceId, sessionId, subscriptionId, tenantId, entityId, TbSubscriptionType.TIMESERIES, updateConsumer);
         this.allKeys = allKeys;
         this.keyStates = keyStates;
         this.startTime = startTime;

application/src/main/java/org/thingsboard/server/service/telemetry/DefaultTelemetryWebSocketService.java

@@ -86,6 +86,7 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.stream.Collectors;
 
@@ -129,6 +130,7 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
     @Autowired
     private TbServiceInfoProvider serviceInfoProvider;
 
+
     @Value("${server.ws.limits.max_subscriptions_per_tenant:0}")
     private int maxSubscriptionsPerTenant;
     @Value("${server.ws.limits.max_subscriptions_per_customer:0}")
@@ -398,7 +400,9 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
                         .entityId(entityId)
                         .allKeys(false)
                         .keyStates(subState)
-                        .scope(scope).build();
+                        .scope(scope)
+                        .updateConsumer(DefaultTelemetryWebSocketService.this::sendWsMsg)
+                        .build();
                 oldSubService.addSubscription(sub);
             }
 
@@ -495,6 +499,7 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
                         .entityId(entityId)
                         .allKeys(true)
                         .keyStates(subState)
+                        .updateConsumer(DefaultTelemetryWebSocketService.this::sendWsMsg)
                         .scope(scope).build();
                 oldSubService.addSubscription(sub);
             }
@@ -575,6 +580,7 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
                         .subscriptionId(cmd.getCmdId())
                         .tenantId(sessionRef.getSecurityCtx().getTenantId())
                         .entityId(entityId)
+                        .updateConsumer(DefaultTelemetryWebSocketService.this::sendWsMsg)
                         .allKeys(true)
                         .keyStates(subState).build();
                 oldSubService.addSubscription(sub);
@@ -612,6 +618,7 @@ public class DefaultTelemetryWebSocketService implements TelemetryWebSocketServi
                         .subscriptionId(cmd.getCmdId())
                         .tenantId(sessionRef.getSecurityCtx().getTenantId())
                         .entityId(entityId)
+                        .updateConsumer(DefaultTelemetryWebSocketService.this::sendWsMsg)
                         .allKeys(false)
                         .keyStates(subState).build();
                 oldSubService.addSubscription(sub);

application/src/test/java/org/thingsboard/server/controller/BaseWebsocketApiTest.java

@@ -5,7 +5,7 @@
  * 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
+ * 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,
@@ -15,6 +15,9 @@
  */
 package org.thingsboard.server.controller;
 
+import com.google.common.util.concurrent.FutureCallback;
+import lombok.extern.slf4j.Slf4j;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
@@ -38,6 +41,7 @@ import org.thingsboard.server.common.data.query.EntityKeyType;
 import org.thingsboard.server.common.data.query.TsValue;
 import org.thingsboard.server.common.data.security.Authority;
 import org.thingsboard.server.dao.timeseries.TimeseriesService;
+import org.thingsboard.server.service.telemetry.TelemetrySubscriptionService;
 import org.thingsboard.server.service.telemetry.cmd.TelemetryPluginCmdsWrapper;
 import org.thingsboard.server.service.telemetry.cmd.v2.EntityDataCmd;
 import org.thingsboard.server.service.telemetry.cmd.v2.EntityDataUpdate;
@@ -46,10 +50,13 @@ import org.thingsboard.server.service.telemetry.cmd.v2.LatestValueCmd;
 
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
+@Slf4j
 public class BaseWebsocketApiTest extends AbstractWebsocketTest {
 
     private Tenant savedTenant;
@@ -57,7 +64,7 @@ public class BaseWebsocketApiTest extends AbstractWebsocketTest {
     private TbTestWebSocketClient wsClient;
 
     @Autowired
-    private TimeseriesService tsService;
+    private TelemetrySubscriptionService tsService;
 
     @Before
     public void beforeTest() throws Exception {
@@ -129,7 +136,10 @@ public class BaseWebsocketApiTest extends AbstractWebsocketTest {
         TsKvEntry dataPoint1 = new BasicTsKvEntry(now - TimeUnit.MINUTES.toMillis(1), new LongDataEntry("temperature", 42L));
         TsKvEntry dataPoint2 = new BasicTsKvEntry(now - TimeUnit.MINUTES.toMillis(2), new LongDataEntry("temperature", 42L));
         TsKvEntry dataPoint3 = new BasicTsKvEntry(now - TimeUnit.MINUTES.toMillis(3), new LongDataEntry("temperature", 42L));
-        tsService.save(device.getTenantId(), device.getId(), Arrays.asList(dataPoint1, dataPoint2, dataPoint3), 0).get();
+        List<TsKvEntry> tsData = Arrays.asList(dataPoint1, dataPoint2, dataPoint3);
+
+        sendTelemetry(device, tsData);
+        Thread.sleep(1000);
 
         wsClient.send(mapper.writeValueAsString(wrapper));
         msg = wsClient.waitForReply();
@@ -146,6 +156,22 @@ public class BaseWebsocketApiTest extends AbstractWebsocketTest {
         Assert.assertEquals(new TsValue(dataPoint3.getTs(), dataPoint3.getValueAsString()), tsArray[2]);
     }
 
+    private void sendTelemetry(Device device, List<TsKvEntry> tsData) throws InterruptedException {
+        CountDownLatch latch = new CountDownLatch(1);
+        tsService.saveAndNotify(device.getTenantId(), device.getId(), tsData, 0, new FutureCallback<Void>() {
+            @Override
+            public void onSuccess(@Nullable Void result) {
+                latch.countDown();
+            }
+
+            @Override
+            public void onFailure(Throwable t) {
+                latch.countDown();
+            }
+        });
+        latch.await(3, TimeUnit.SECONDS);
+    }
+
     @Test
     @Ignore
     public void testEntityDataLatestWsCmd() throws Exception {
@@ -177,12 +203,15 @@ public class BaseWebsocketApiTest extends AbstractWebsocketTest {
         Assert.assertNotNull(pageData);
         Assert.assertEquals(1, pageData.getData().size());
         Assert.assertEquals(device.getId(), pageData.getData().get(0).getEntityId());
-        Assert.assertNull(pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature"));
+        Assert.assertNotNull(pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature"));
+        Assert.assertEquals(0, pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature").getTs());
+        Assert.assertEquals("", pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature").getValue());
 
         TsKvEntry dataPoint1 = new BasicTsKvEntry(now - TimeUnit.MINUTES.toMillis(1), new LongDataEntry("temperature", 42L));
-        tsService.save(device.getTenantId(), device.getId(), Arrays.asList(dataPoint1), 0).get();
+        List<TsKvEntry> tsData = Arrays.asList(dataPoint1);
+        sendTelemetry(device, tsData);
 
-        cmd = new EntityDataCmd(2, edq, null, latestCmd, null);
+        cmd = new EntityDataCmd(1, edq, null, latestCmd, null);
 
         wrapper = new TelemetryPluginCmdsWrapper();
         wrapper.setEntityDataCmds(Collections.singletonList(cmd));
@@ -190,7 +219,7 @@ public class BaseWebsocketApiTest extends AbstractWebsocketTest {
         wsClient.send(mapper.writeValueAsString(wrapper));
         msg = wsClient.waitForReply();
         update = mapper.readValue(msg, EntityDataUpdate.class);
-        Assert.assertEquals(2, update.getCmdId());
+        Assert.assertEquals(1, update.getCmdId());
         pageData = update.getData();
         Assert.assertNotNull(pageData);
         Assert.assertEquals(1, pageData.getData().size());
@@ -198,6 +227,22 @@ public class BaseWebsocketApiTest extends AbstractWebsocketTest {
         Assert.assertNotNull(pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES));
         TsValue tsValue = pageData.getData().get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature");
         Assert.assertEquals(new TsValue(dataPoint1.getTs(), dataPoint1.getValueAsString()), tsValue);
+
+        log.error("GOING TO LISTEN FOR UPDATES");
+        msg = wsClient.waitForUpdate();
+        now = System.currentTimeMillis();
+        TsKvEntry dataPoint2 = new BasicTsKvEntry(now, new LongDataEntry("temperature", 52L));
+        sendTelemetry(device, Arrays.asList(dataPoint2));
+
+        update = mapper.readValue(msg, EntityDataUpdate.class);
+        Assert.assertEquals(1, update.getCmdId());
+        List<EntityData> eData = update.getUpdate();
+        Assert.assertNotNull(eData);
+        Assert.assertEquals(1, eData.size());
+        Assert.assertEquals(device.getId(), eData.get(0).getEntityId());
+        Assert.assertNotNull(eData.get(0).getLatest().get(EntityKeyType.TIME_SERIES));
+        tsValue = eData.get(0).getLatest().get(EntityKeyType.TIME_SERIES).get("temperature");
+        Assert.assertEquals(new TsValue(dataPoint2.getTs(), dataPoint2.getValueAsString()), tsValue);
     }
 
 }

application/src/test/java/org/thingsboard/server/controller/TbTestWebSocketClient.java

@@ -5,7 +5,7 @@
  * 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
+ * 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,
@@ -27,9 +27,11 @@ import java.util.concurrent.TimeUnit;
 @Slf4j
 public class TbTestWebSocketClient extends WebSocketClient {
 
-    private volatile String lastMsg;
+    private volatile String lastReply;
+    private volatile String lastUpdate;
     private volatile boolean replyReceived;
     private CountDownLatch reply;
+    private CountDownLatch update;
 
     public TbTestWebSocketClient(URI serverUri) {
         super(serverUri);
@@ -42,11 +44,22 @@ public class TbTestWebSocketClient extends WebSocketClient {
 
     @Override
     public void onMessage(String s) {
-        if (!replyReceived) {
-            replyReceived = true;
-            lastMsg = s;
-            if (reply != null) {
-                reply.countDown();
+        log.error("RECEIVED: {}", s);
+        synchronized (this) {
+            if (!replyReceived) {
+                replyReceived = true;
+                lastReply = s;
+                log.error("LAST REPLY: {}", s);
+                if (reply != null) {
+                    reply.countDown();
+                }
+            } else {
+                lastUpdate = s;
+                log.error("LAST UPDATE: {}", s);
+                if (update == null) {
+                    update = new CountDownLatch(1);
+                }
+                update.countDown();
             }
         }
     }
@@ -63,17 +76,31 @@ public class TbTestWebSocketClient extends WebSocketClient {
 
     @Override
     public void send(String text) throws NotYetConnectedException {
-        reply = new CountDownLatch(1);
-        replyReceived = false;
+        synchronized (this) {
+            reply = new CountDownLatch(1);
+            replyReceived = false;
+        }
         super.send(text);
     }
 
+    public String waitForUpdate() {
+        synchronized (this) {
+            update = new CountDownLatch(1);
+        }
+        try {
+            update.await(3, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+            log.warn("Failed to await reply", e);
+        }
+        return lastUpdate;
+    }
+
     public String waitForReply() {
         try {
             reply.await(3, TimeUnit.SECONDS);
         } catch (InterruptedException e) {
             log.warn("Failed to await reply", e);
         }
-        return lastMsg;
+        return lastReply;
     }
 }

dao/src/main/java/org/thingsboard/server/dao/sql/query/EntityKeyMapping.java

@@ -121,7 +121,7 @@ public class EntityKeyMapping {
         String join = hasFilter() ? "left join" : "left outer join";
         ctx.addStringParameter(alias + "_key_id", entityKey.getKey());
         if (entityKey.getType().equals(EntityKeyType.TIME_SERIES)) {
-            return String.format("%s ts_kv_latest %s ON %s.entity_id=to_uuid(entities.id) AND %s.key = (select key_id from ts_kv_dictionary where key = :%s_key_id)",
+            return String.format("%s ts_kv_latest %s ON %s.entity_id=entities.id AND %s.key = (select key_id from ts_kv_dictionary where key = :%s_key_id)",
                     join, alias, alias, alias, alias);
         } else {
             String query = String.format("%s attribute_kv %s ON %s.entity_id=entities.id AND %s.entity_type=%s AND %s.attribute_key=:%s_key_id",