Method to create default rule chain for device profile

+{
+  "ruleChain": {
+    "additionalInfo": {
+      "description": ""
+    },
+    "name": "Device Profile Rule Chain Template",
+    "firstRuleNodeId": null,
+    "root": false,
+    "debugMode": false,
+    "configuration": null
+  },
+  "metadata": {
+    "firstNodeIndex": 6,
+    "nodes": [
+      {
+        "additionalInfo": {
+          "layoutX": 822,
+          "layoutY": 294
+        },
+        "type": "org.thingsboard.rule.engine.telemetry.TbMsgTimeseriesNode",
+        "name": "Save Timeseries",
+        "debugMode": false,
+        "configuration": {
+          "defaultTTL": 0
+        }
+      },
+      {
+        "additionalInfo": {
+          "layoutX": 824,
+          "layoutY": 221
+        },
+        "type": "org.thingsboard.rule.engine.telemetry.TbMsgAttributesNode",
+        "name": "Save Client Attributes",
+        "debugMode": false,
+        "configuration": {
+          "scope": "CLIENT_SCOPE"
+        }
+      },
+      {
+        "additionalInfo": {
+          "layoutX": 494,
+          "layoutY": 309
+        },
+        "type": "org.thingsboard.rule.engine.filter.TbMsgTypeSwitchNode",
+        "name": "Message Type Switch",
+        "debugMode": false,
+        "configuration": {
+          "version": 0
+        }
+      },
+      {
+        "additionalInfo": {
+          "layoutX": 824,
+          "layoutY": 383
+        },
+        "type": "org.thingsboard.rule.engine.action.TbLogNode",
+        "name": "Log RPC from Device",
+        "debugMode": false,
+        "configuration": {
+          "jsScript": "return '\\nIncoming message:\\n' + JSON.stringify(msg) + '\\nIncoming metadata:\\n' + JSON.stringify(metadata);"
+        }
+      },
+      {
+        "additionalInfo": {
+          "layoutX": 823,
+          "layoutY": 444
+        },
+        "type": "org.thingsboard.rule.engine.action.TbLogNode",
+        "name": "Log Other",
+        "debugMode": false,
+        "configuration": {
+          "jsScript": "return '\\nIncoming message:\\n' + JSON.stringify(msg) + '\\nIncoming metadata:\\n' + JSON.stringify(metadata);"
+        }
+      },
+      {
+        "additionalInfo": {
+          "layoutX": 822,
+          "layoutY": 507
+        },
+        "type": "org.thingsboard.rule.engine.rpc.TbSendRPCRequestNode",
+        "name": "RPC Call Request",
+        "debugMode": false,
+        "configuration": {
+          "timeoutInSeconds": 60
+        }
+      },
+      {
+        "additionalInfo": {
+          "description": "",
+          "layoutX": 209,
+          "layoutY": 307
+        },
+        "type": "org.thingsboard.rule.engine.profile.TbDeviceProfileNode",
+        "name": "Device Profile Node",
+        "debugMode": false,
+        "configuration": {
+          "version": 0
+        }
+      }
+    ],
+    "connections": [
+      {
+        "fromIndex": 2,
+        "toIndex": 4,
+        "type": "Other"
+      },
+      {
+        "fromIndex": 2,
+        "toIndex": 1,
+        "type": "Post attributes"
+      },
+      {
+        "fromIndex": 2,
+        "toIndex": 0,
+        "type": "Post telemetry"
+      },
+      {
+        "fromIndex": 2,
+        "toIndex": 3,
+        "type": "RPC Request from Device"
+      },
+      {
+        "fromIndex": 2,
+        "toIndex": 5,
+        "type": "RPC Request to Device"
+      },
+      {
+        "fromIndex": 6,
+        "toIndex": 2,
+        "type": "Success"
+      }
+    ],
+    "ruleChainConnections": null
+  }
+}
\ No newline at end of file

@@ -47,6 +47,7 @@ import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.page.PageData;
 import org.thingsboard.server.common.data.page.PageLink;
 import org.thingsboard.server.common.data.plugin.ComponentLifecycleEvent;
+import org.thingsboard.server.common.data.rule.DefaultRuleChainCreateRequest;
 import org.thingsboard.server.common.data.rule.RuleChain;
 import org.thingsboard.server.common.data.rule.RuleChainMetaData;
 import org.thingsboard.server.common.data.rule.RuleNode;
@@ -55,6 +56,7 @@ import org.thingsboard.server.common.msg.TbMsgDataType;
 import org.thingsboard.server.common.msg.TbMsgMetaData;
 import org.thingsboard.server.dao.event.EventService;
 import org.thingsboard.server.queue.util.TbCoreComponent;
+import org.thingsboard.server.service.install.InstallScripts;
 import org.thingsboard.server.service.script.JsInvokeService;
 import org.thingsboard.server.service.script.RuleNodeJsScriptEngine;
 import org.thingsboard.server.service.security.permission.Operation;
@@ -78,6 +80,9 @@ public class RuleChainController extends BaseController {
     private static final ObjectMapper objectMapper = new ObjectMapper();
 
     @Autowired
+    private InstallScripts installScripts;
+
+    @Autowired
     private EventService eventService;
 
     @Autowired
@@ -147,6 +152,27 @@ public class RuleChainController extends BaseController {
     }
 
     @PreAuthorize("hasAnyAuthority('TENANT_ADMIN')")
+    @RequestMapping(value = "/ruleChain/device/default", method = RequestMethod.POST)
+    @ResponseBody
+    public RuleChain saveRuleChain(@RequestBody DefaultRuleChainCreateRequest request) throws ThingsboardException {
+        try {
+            checkNotNull(request);
+            checkNotNull(request.getName());
+
+            RuleChain savedRuleChain = installScripts.createDefaultRuleChain(getCurrentUser().getTenantId(), request.getName());
+
+            logEntityAction(savedRuleChain.getId(), savedRuleChain, null, ActionType.ADDED, null);
+
+            return savedRuleChain;
+        } catch (Exception e) {
+            RuleChain ruleChain = new RuleChain();
+            ruleChain.setName(request.getName());
+            logEntityAction(emptyId(EntityType.RULE_CHAIN), ruleChain, null, ActionType.ADDED, e);
+            throw handleException(e);
+        }
+    }
+
+    @PreAuthorize("hasAnyAuthority('TENANT_ADMIN')")
     @RequestMapping(value = "/ruleChain/{ruleChainId}/root", method = RequestMethod.POST)
     @ResponseBody
     public RuleChain setRootRuleChain(@PathVariable(RULE_CHAIN_ID) String strRuleChainId) throws ThingsboardException {

@@ -57,6 +57,7 @@ public class InstallScripts {
     public static final String JSON_DIR = "json";
     public static final String SYSTEM_DIR = "system";
     public static final String TENANT_DIR = "tenant";
+    public static final String DEVICE_PROFILE_DIR = "device_profile";
     public static final String DEMO_DIR = "demo";
     public static final String RULE_CHAINS_DIR = "rule_chains";
     public static final String WIDGET_BUNDLES_DIR = "widget_bundles";
@@ -83,6 +84,10 @@ public class InstallScripts {
         return Paths.get(getDataDir(), JSON_DIR, TENANT_DIR, RULE_CHAINS_DIR);
     }
 
+    public Path getDeviceProfileDefaultRuleChainTemplateFilePath() {
+        return Paths.get(getDataDir(), JSON_DIR, DEVICE_PROFILE_DIR, "rule_chain_template.json");
+    }
+
     public String getDataDir() {
         if (!StringUtils.isEmpty(dataDir)) {
             if (!Paths.get(this.dataDir).toFile().isDirectory()) {
@@ -110,15 +115,7 @@ public class InstallScripts {
             dirStream.forEach(
                     path -> {
                         try {
-                            JsonNode ruleChainJson = objectMapper.readTree(path.toFile());
-                            RuleChain ruleChain = objectMapper.treeToValue(ruleChainJson.get("ruleChain"), RuleChain.class);
-                            RuleChainMetaData ruleChainMetaData = objectMapper.treeToValue(ruleChainJson.get("metadata"), RuleChainMetaData.class);
-
-                            ruleChain.setTenantId(tenantId);
-                            ruleChain = ruleChainService.saveRuleChain(ruleChain);
-
-                            ruleChainMetaData.setRuleChainId(ruleChain.getId());
-                            ruleChainService.saveRuleChainMetaData(new TenantId(EntityId.NULL_UUID), ruleChainMetaData);
+                            createRuleChainFromFile(tenantId, path, null);
                         } catch (Exception e) {
                             log.error("Unable to load rule chain from json: [{}]", path.toString());
                             throw new RuntimeException("Unable to load rule chain from json", e);
@@ -128,6 +125,28 @@ public class InstallScripts {
         }
     }
 
+    public RuleChain createDefaultRuleChain(TenantId tenantId, String ruleChainName) throws IOException {
+        return createRuleChainFromFile(tenantId, getDeviceProfileDefaultRuleChainTemplateFilePath(), ruleChainName);
+    }
+
+    public RuleChain createRuleChainFromFile(TenantId tenantId, Path templateFilePath, String newRuleChainName) throws IOException {
+        JsonNode ruleChainJson = objectMapper.readTree(templateFilePath.toFile());
+        RuleChain ruleChain = objectMapper.treeToValue(ruleChainJson.get("ruleChain"), RuleChain.class);
+        RuleChainMetaData ruleChainMetaData = objectMapper.treeToValue(ruleChainJson.get("metadata"), RuleChainMetaData.class);
+
+        ruleChain.setTenantId(tenantId);
+        if (!StringUtils.isEmpty(newRuleChainName)) {
+            ruleChain.setName(newRuleChainName);
+        }
+        ruleChain = ruleChainService.saveRuleChain(ruleChain);
+
+        ruleChainMetaData.setRuleChainId(ruleChain.getId());
+        ruleChainService.saveRuleChainMetaData(new TenantId(EntityId.NULL_UUID), ruleChainMetaData);
+
+        return ruleChain;
+    }
+
+
     public void loadSystemWidgets() throws Exception {
         Path widgetBundlesDir = Paths.get(getDataDir(), JSON_DIR, SYSTEM_DIR, WIDGET_BUNDLES_DIR);
         try (DirectoryStream<Path> dirStream = Files.newDirectoryStream(widgetBundlesDir, path -> path.toString().endsWith(JSON_EXT))) {

+/**
+ * Copyright © 2016-2020 The Thingsboard Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.thingsboard.server.common.data.rule;
+
+import lombok.Data;
+import lombok.extern.slf4j.Slf4j;
+
+import java.io.Serializable;
+
+@Data
+@Slf4j
+public class DefaultRuleChainCreateRequest implements Serializable {
+
+    private static final long serialVersionUID = 5600333716030561537L;
+
+    private String name;
+
+}

@@ -22,6 +22,7 @@ import org.thingsboard.rule.engine.api.TbContext;
 import org.thingsboard.server.common.data.DataConstants;
 import org.thingsboard.server.common.data.alarm.Alarm;
 import org.thingsboard.server.common.data.alarm.AlarmSeverity;
+import org.thingsboard.server.common.data.alarm.AlarmStatus;
 import org.thingsboard.server.common.data.device.profile.AlarmCondition;
 import org.thingsboard.server.common.data.device.profile.AlarmRule;
 import org.thingsboard.server.common.data.device.profile.DeviceProfileAlarm;
@@ -34,11 +35,13 @@ import org.thingsboard.server.common.data.query.NumericFilterPredicate;
 import org.thingsboard.server.common.data.query.StringFilterPredicate;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.TbMsgMetaData;
+import org.thingsboard.server.dao.alarm.AlarmService;
 import org.thingsboard.server.dao.util.mapping.JacksonUtil;
 
 import java.util.Comparator;
 import java.util.Map;
 import java.util.TreeMap;
+import java.util.concurrent.ExecutionException;
 
 @Data
 class DeviceProfileAlarmState {
@@ -47,6 +50,7 @@ class DeviceProfileAlarmState {
     private final DeviceProfileAlarm alarmDefinition;
     private volatile Map<AlarmSeverity, AlarmRule> createRulesSortedBySeverityDesc;
     private volatile Alarm currentAlarm;
+    private volatile boolean initialFetchDone;
 
     public DeviceProfileAlarmState(EntityId originator, DeviceProfileAlarm alarmDefinition) {
         this.originator = originator;
@@ -55,7 +59,15 @@ class DeviceProfileAlarmState {
         this.createRulesSortedBySeverityDesc.putAll(alarmDefinition.getCreateRules());
     }
 
-    public void process(TbContext ctx, TbMsg msg, DeviceDataSnapshot data) {
+    public void process(TbContext ctx, TbMsg msg, DeviceDataSnapshot data) throws ExecutionException, InterruptedException {
+        if (!initialFetchDone) {
+            Alarm alarm = ctx.getAlarmService().findLatestByOriginatorAndType(ctx.getTenantId(), originator, alarmDefinition.getAlarmType()).get();
+            if (alarm != null && !alarm.getStatus().isCleared()) {
+                currentAlarm = alarm;
+            }
+            initialFetchDone = true;
+        }
+
         AlarmSeverity resultSeverity = null;
         for (Map.Entry<AlarmSeverity, AlarmRule> kv : createRulesSortedBySeverityDesc.entrySet()) {
             AlarmRule alarmRule = kv.getValue();
@@ -69,6 +81,7 @@ class DeviceProfileAlarmState {
         } else if (currentAlarm != null) {
             AlarmRule clearRule = alarmDefinition.getClearRule();
             if (eval(clearRule.getCondition(), data)) {
+                ctx.getAlarmService().clearAlarm(ctx.getTenantId(), currentAlarm.getId(), JacksonUtil.OBJECT_MAPPER.createObjectNode(), System.currentTimeMillis());
                 pushMsg(ctx, new TbAlarmResult(false, false, true, currentAlarm), msg);
                 currentAlarm = null;
             }
@@ -112,6 +125,8 @@ class DeviceProfileAlarmState {
             }
         } else {
             currentAlarm = new Alarm();
+            currentAlarm.setType(alarmDefinition.getAlarmType());
+            currentAlarm.setStatus(AlarmStatus.ACTIVE_UNACK);
             currentAlarm.setSeverity(severity);
             currentAlarm.setStartTs(System.currentTimeMillis());
             currentAlarm.setEndTs(currentAlarm.getStartTs());

@@ -62,15 +62,17 @@ class DeviceState {
         }
     }
 
-    private void processTelemetry(TbContext ctx, TbMsg msg) {
+    private void processTelemetry(TbContext ctx, TbMsg msg) throws ExecutionException, InterruptedException {
         Map<Long, List<KvEntry>> tsKvMap = JsonConverter.convertToSortedTelemetry(new JsonParser().parse(msg.getData()), TbMsgTimeseriesNode.getTs(msg));
-        tsKvMap.forEach((ts, data) -> {
+        for (Map.Entry<Long, List<KvEntry>> entry : tsKvMap.entrySet()) {
+            Long ts = entry.getKey();
+            List<KvEntry> data = entry.getValue();
             latestValues = merge(latestValues, ts, data);
             for (DeviceProfileAlarm alarm : deviceProfile.getAlarmSettings()) {
                 DeviceProfileAlarmState alarmState = alarmStates.computeIfAbsent(alarm.getId(), a -> new DeviceProfileAlarmState(msg.getOriginator(), alarm));
                 alarmState.process(ctx, msg, latestValues);
             }
-        });
+        }
         ctx.tellSuccess(msg);
     }
 
@@ -140,7 +142,9 @@ class DeviceState {
         if (!latestTsKeys.isEmpty()) {
             List<TsKvEntry> data = ctx.getTimeseriesService().findLatest(ctx.getTenantId(), originator, latestTsKeys).get();
             for (TsKvEntry entry : data) {
-                result.putValue(new EntityKey(EntityKeyType.TIME_SERIES, entry.getKey()), toEntityValue(entry));
+                if (entry.getValue() != null) {
+                    result.putValue(new EntityKey(EntityKeyType.TIME_SERIES, entry.getKey()), toEntityValue(entry));
+                }
             }
         }
         if (!clientAttributeKeys.isEmpty()) {
@@ -161,10 +165,12 @@ class DeviceState {
 
     private void addToSnapshot(DeviceDataSnapshot snapshot, Set<String> commonAttributeKeys, List<AttributeKvEntry> data) {
         for (AttributeKvEntry entry : data) {
-            EntityKeyValue value = toEntityValue(entry);
-            snapshot.putValue(new EntityKey(EntityKeyType.CLIENT_ATTRIBUTE, entry.getKey()), value);
-            if (commonAttributeKeys.contains(entry.getKey())) {
-                snapshot.putValue(new EntityKey(EntityKeyType.ATTRIBUTE, entry.getKey()), value);
+            if (entry.getValue() != null) {
+                EntityKeyValue value = toEntityValue(entry);
+                snapshot.putValue(new EntityKey(EntityKeyType.CLIENT_ATTRIBUTE, entry.getKey()), value);
+                if (commonAttributeKeys.contains(entry.getKey())) {
+                    snapshot.putValue(new EntityKey(EntityKeyType.ATTRIBUTE, entry.getKey()), value);
+                }
             }
         }
     }

@@ -137,6 +137,7 @@ public class TbDeviceProfileNodeTest {
         alarmRule.setCondition(alarmCondition);
         DeviceProfileAlarm dpa = new DeviceProfileAlarm();
         dpa.setId("highTemperatureAlarmID");
+        dpa.setAlarmType("highTemperatureAlarm");
         dpa.setCreateRules(Collections.singletonMap(AlarmSeverity.CRITICAL, alarmRule));
         deviceProfileData.setAlarms(Collections.singletonList(dpa));
         deviceProfile.setProfileData(deviceProfileData);
@@ -144,6 +145,7 @@ public class TbDeviceProfileNodeTest {
         Mockito.when(cache.get(tenantId, deviceId)).thenReturn(deviceProfile);
         Mockito.when(timeseriesService.findLatest(tenantId, deviceId, Collections.singleton("temperature")))
                 .thenReturn(Futures.immediateFuture(Collections.emptyList()));
+        Mockito.when(alarmService.findLatestByOriginatorAndType(tenantId, deviceId, "highTemperatureAlarm")).thenReturn(Futures.immediateFuture(null));
         Mockito.when(alarmService.createOrUpdateAlarm(Mockito.any())).thenAnswer(AdditionalAnswers.returnsFirstArg());
 
         TbMsg theMsg = TbMsg.newMsg("ALARM", deviceId, new TbMsgMetaData(), "");