/**
 * Copyright © 2016-2022 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.rule.engine.telemetry;

import com.google.gson.JsonParser;
import lombok.extern.slf4j.Slf4j;
import org.thingsboard.server.common.data.StringUtils;
import org.thingsboard.rule.engine.api.RuleNode;
import org.thingsboard.rule.engine.api.TbContext;
import org.thingsboard.rule.engine.api.TbNode;
import org.thingsboard.rule.engine.api.TbNodeConfiguration;
import org.thingsboard.rule.engine.api.TbNodeException;
import org.thingsboard.rule.engine.api.util.TbNodeUtils;
import org.thingsboard.server.common.data.kv.AttributeKvEntry;
import org.thingsboard.server.common.data.plugin.ComponentType;
import org.thingsboard.server.common.msg.TbMsg;
import org.thingsboard.server.common.msg.session.SessionMsgType;
import org.thingsboard.server.common.transport.adaptor.JsonConverter;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@RuleNode(
        type = ComponentType.ACTION,
        name = "save attributes",
        configClazz = TbMsgAttributesNodeConfiguration.class,
        nodeDescription = "Saves attributes data",
        nodeDetails = "Saves entity attributes based on configurable scope parameter. Expects messages with 'POST_ATTRIBUTES_REQUEST' message type. " +
                      "If upsert(update/insert) operation is completed successfully, rule node will send the \"Attributes Updated\" " +
                      "event to the root chain of the message originator and send the incoming message via <b>Success</b> chain, otherwise, <b>Failure</b> chain is used.",
        uiResources = {"static/rulenode/rulenode-core-config.js"},
        configDirective = "tbActionNodeAttributesConfig",
        icon = "file_upload"
)
public class TbMsgAttributesNode implements TbNode {

    private TbMsgAttributesNodeConfiguration config;

    @Override
    public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
        this.config = TbNodeUtils.convert(configuration, TbMsgAttributesNodeConfiguration.class);
        if (config.getNotifyDevice() == null) {
            config.setNotifyDevice(true);
        }
    }

    @Override
    public void onMsg(TbContext ctx, TbMsg msg) {
        if (!msg.getType().equals(SessionMsgType.POST_ATTRIBUTES_REQUEST.name())) {
            ctx.tellFailure(msg, new IllegalArgumentException("Unsupported msg type: " + msg.getType()));
            return;
        }
        String src = msg.getData();
        List<AttributeKvEntry> attributes = new ArrayList<>(JsonConverter.convertToAttributes(new JsonParser().parse(src)));
        String notifyDeviceStr = msg.getMetaData().getValue("notifyDevice");
        ctx.getTelemetryService().saveAndNotify(
                ctx.getTenantId(),
                msg.getOriginator(),
                config.getScope(),
                attributes,
                config.getNotifyDevice() || StringUtils.isEmpty(notifyDeviceStr) || Boolean.parseBoolean(notifyDeviceStr),
                new AttributesUpdateNodeCallback(ctx, msg, config.getScope(), attributes)
        );
    }

}

@@ -3144,24 +3144,124 @@
 rse(src)));%0A
+        if (attributes.isEmpty()) %7B%0A            ctx.tellSuccess(msg);%0A            return;%0A        %7D%0A
         Stri

add validation for empty list of attributes in save attributes node