Create TbCreateRelationNode

+package org.thingsboard.rule.engine.action;
+
+import com.google.common.util.concurrent.ListenableFuture;
+import lombok.extern.slf4j.Slf4j;
+import org.thingsboard.rule.engine.api.*;
+import org.thingsboard.rule.engine.api.util.DonAsynchron;
+import org.thingsboard.rule.engine.api.util.TbNodeUtils;
+import org.thingsboard.server.common.data.id.EntityId;
+import org.thingsboard.server.common.data.id.EntityIdFactory;
+import org.thingsboard.server.common.data.plugin.ComponentType;
+import org.thingsboard.server.common.data.relation.EntityRelation;
+import org.thingsboard.server.common.data.relation.EntitySearchDirection;
+import org.thingsboard.server.common.data.relation.RelationTypeGroup;
+import org.thingsboard.server.common.msg.TbMsg;
+
+import static org.thingsboard.rule.engine.api.TbRelationTypes.FAILURE;
+import static org.thingsboard.rule.engine.api.TbRelationTypes.SUCCESS;
+import static org.thingsboard.rule.engine.api.util.DonAsynchron.withCallback;
+
+@Slf4j
+@RuleNode(
+        type = ComponentType.ACTION,
+        name = "create relation",
+        configClazz = TbCreateRelationNodeConfiguration.class,
+        nodeDescription = "Create the relation from the selected entity to originator of the message by type and direction",
+        nodeDetails = "If relation is already exists - send Message via <b>Success</b> chain with error message, otherwise is also used <b>Success</b> chain without error message.",
+        uiResources = {"static/rulenode/rulenode-core-config.js"},
+        configDirective = "tbFilterNodeCheckRelationConfig")
+public class TbCreateRelationNode implements TbNode {
+
+    private TbCreateRelationNodeConfiguration config;
+    private EntityId fromId;
+    private EntityId toId;
+
+    @Override
+    public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
+        this.config = TbNodeUtils.convert(configuration, TbCreateRelationNodeConfiguration.class);
+    }
+
+    @Override
+    public void onMsg(TbContext ctx, TbMsg msg) {
+        DonAsynchron.withCallback(checkRelation(ctx, msg), result -> {
+            if (result) {
+                ctx.tellNext(msg, SUCCESS, new Throwable("Relation between message originator and Entity: " + config.getEntityId() + " is already exist"));
+            } else {
+                processCreateRelation(ctx, msg);
+            }
+        }, error -> ctx.tellFailure(msg, error), ctx.getDbCallbackExecutor());
+    }
+
+    @Override
+    public void destroy() {
+    }
+
+    private ListenableFuture<Boolean> checkRelation(TbContext ctx, TbMsg msg) {
+        if (EntitySearchDirection.TO.name().equals(config.getDirection())) {
+            fromId = EntityIdFactory.getByTypeAndId(config.getEntityType(), config.getEntityId());
+            toId = msg.getOriginator();
+        } else {
+            fromId = EntityIdFactory.getByTypeAndId(config.getEntityType(), config.getEntityId());
+            toId = msg.getOriginator();
+        }
+        return ctx.getRelationService().checkRelation(ctx.getTenantId(), fromId, toId, config.getRelationType(), RelationTypeGroup.COMMON);
+    }
+
+    private void processCreateRelation(TbContext ctx, TbMsg msg) {
+        EntityRelation entityRelation = new EntityRelation(fromId, toId, config.getRelationType(), RelationTypeGroup.COMMON);
+        withCallback(ctx.getRelationService().saveRelationAsync(ctx.getTenantId(), entityRelation),
+                filterResult -> ctx.tellNext(msg, filterResult ? SUCCESS : FAILURE), t -> ctx.tellFailure(msg, t), ctx.getDbCallbackExecutor());
+    }
+
+}

+package org.thingsboard.rule.engine.action;
+
+import lombok.Data;
+import org.thingsboard.rule.engine.api.NodeConfiguration;
+import org.thingsboard.server.common.data.relation.EntitySearchDirection;
+
+@Data
+public class TbCreateRelationNodeConfiguration implements NodeConfiguration<TbCreateRelationNodeConfiguration> {
+
+    private String direction;
+    private String entityId;
+    private String entityType;
+    private String relationType;
+
+
+    @Override
+    public TbCreateRelationNodeConfiguration defaultConfiguration() {
+        TbCreateRelationNodeConfiguration configuration = new TbCreateRelationNodeConfiguration();
+        configuration.setDirection(EntitySearchDirection.FROM.name());
+        configuration.setRelationType("Contains");
+        return configuration;
+    }
+}