@edgeflow/kafka-client

@edgeflow/kafka-client

EdgeFlow Kafka Consumer and Producer

This node can be used in order to produce and consume messages to Kafka. It is highly depends on 'kafka-node' library. Consists three nodes.

• hm-kafka-broker
• hm-kafka-producer
• hm-karka-consumer

Note: This library add sasl/plain supports base on kafka-client project

Input Parameters

kafka-broker

Name (Optional)

Name wanted to be shown in Node

Hosts

Host names comma delimited (Multiple host is provided)

Use TLS

Check if tls security is required for Kafka Cluster

CA Certs (Optional)

CA Root certificate path defined in Kafka Cluster

Client Cert (Optional)

Client cert path created by openssl derived from Private Key (pem)

Private Key (Optional)

Private Key path created by openssl (pem)

Passphare (Optional)

Passphrase of created private Key

Self Sign

Check if want to be allowed untrusted certificates

Use SASL

Check if SASL security is required for Kafka Cluster

SASL Username (Optional)

SASL Username

SASL Password (Optional)

SASL Password

kafka-producer

Name (Optional)

Name wanted to be shown in NodeRename your node

Broker

Broker which is wanted to be connect

Topic

Topic name of selected broker which is wanted to be consume

Require Ack

Default value is 1. 0 can be past if Acknowledge is not required.

Ack Timeout

Timeout of acknowledge response.

Attiributes

Can be selected if compression is important

kafka-consumer

Name (Optional)

Name wanted to be shown in NodeRename your node

Broker

Broker which is wanted to be connect

Topic

Topic name of selected broker which is wanted to be consume

From Offset

'latest', 'none' or 'earliest' options can be selected

Out of Range Offset

'latest', 'none' or 'earliest' options can be selected

Installation

npm install @edgeflow/kafka-client

Usage

• Example JSON here

{"topic":"TOPIC_NAME","value":"DENEME","offset":16638,"partition":0,"highWaterOffset":16639,"key":null,"timestamp":"2020-08-19T08:58:27.866Z"}

Screenshots

IOT 参数说明

源格式

{
    "enterCarNum": 105,
    "internetStatus": 1,
    "dataTime": 1706438947487,
    "name": "g端预发布车场",
    "freeNum": 4997,
    "plateNum": 5102,
    "parkId": "20201130105422734010026003601298"
}

broker 开启iot上云配置之后，自动格式化为：

{
  "mc": "121212",
  "dc": "343434",
  "type": "props",
  "nameTypes": [
    "name:TEXT",
    "parkId:TEXT",
    "enterCarNum:INT32",
    "internetStatus:INT32",
    "freeNum:INT32",
    "plateNum:INT32"
  ],
  "ts": [1706442643979],
  "values": [
    ["g端预发布车场", "20201130105422734010026003601298", 105, 1, 4997, 5102]
  ]
}

flows code

[
    {
        "id": "38455e3c08fa62ab",
        "type": "tab",
        "label": "流程 1",
        "disabled": false,
        "info": "",
        "env": []
    },
    {
        "id": "b8e47102069aaad9",
        "type": "inject",
        "z": "38455e3c08fa62ab",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": true,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 300,
        "y": 280,
        "wires": [
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    {
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        "type": "function",
        "z": "38455e3c08fa62ab",
        "name": "数据",
        "func": "msg.broker = {};\nmsg.broker.model = '121212'\nmsg.broker.device = '343434'\n\nmsg.payload = {\n    \"enterCarNum\": 105,\n    \"internetStatus\": 1,\n    \"dataTime\": 1706438947487,\n    \"name\": \"g端预发布车场\",\n    \"freeNum\": 4997,\n    \"plateNum\": 5102,\n    \"parkId\": \"20201130105422734010026003601298\"\n}\n\nreturn msg;",
        "outputs": 1,
        "timeout": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 490,
        "y": 280,
        "wires": [
            [
                "ce8b5c02b1f4c17c"
            ]
        ]
    },
    {
        "id": "ce8b5c02b1f4c17c",
        "type": "hm-kafka-producer",
        "z": "38455e3c08fa62ab",
        "name": "",
        "broker": "f7b89f9454780a93",
        "topic": "iot-tablet-props-test",
        "requireAcks": 1,
        "ackTimeoutMs": 100,
        "attributes": 0,
        "x": 720,
        "y": 280,
        "wires": []
    },
    {
        "id": "4b2b5ddfd4f03b36",
        "type": "hm-kafka-consumer",
        "z": "38455e3c08fa62ab",
        "name": "",
        "broker": "f7b89f9454780a93",
        "outOfRangeOffset": "earliest",
        "fromOffset": "latest",
        "topic": "iot-tablet-props-test",
        "groupid": "",
        "encoding": "utf8",
        "x": 280,
        "y": 420,
        "wires": [
            [
                "dc995c6be8028295"
            ]
        ]
    },
    {
        "id": "04ad34e8b6dd113d",
        "type": "debug",
        "z": "38455e3c08fa62ab",
        "name": "debug 1",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 660,
        "y": 420,
        "wires": []
    },
    {
        "id": "dc995c6be8028295",
        "type": "function",
        "z": "38455e3c08fa62ab",
        "name": "toJSON",
        "func": "const value = JSON.parse(msg.payload.value)\nmsg.payload = value\nreturn msg;",
        "outputs": 1,
        "timeout": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 480,
        "y": 420,
        "wires": [
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    },
    {
        "id": "f7b89f9454780a93",
        "type": "hm-kafka-broker",
        "name": "",
        "hosts": "147.13.93.122:19004",
        "usesasl": false,
        "username": "",
        "password": "",
        "usetls": false,
        "cacert": "",
        "clientcert": "",
        "privatekey": "",
        "passphrase": "",
        "selfsign": false,
        "useiot": true,
        "model": "use",
        "device": "use",
        "iotType": "props",
        "fields": [
            {
                "fieldName": "name",
                "dataType": "TEXT"
            },
            {
                "fieldName": "parkId",
                "dataType": "TEXT"
            },
            {
                "fieldName": "enterCarNum",
                "dataType": "INT32"
            },
            {
                "fieldName": "internetStatus",
                "dataType": "INT32"
            },
            {
                "fieldName": "freeNum",
                "dataType": "INT32"
            },
            {
                "fieldName": "plateNum",
                "dataType": "INT32"
            }
        ]
    }
]