{
"nodes": [
{
"id": "ffe22db7-06b9-4efe-ab35-758e420dbe57",
"name": "END",
"type": "n8n-nodes-base.noOp",
"position": [
-2880,
540
],
"parameters": [],
"typeVersion": 1
},
{
"id": "9480feb6-e12a-4b59-998e-bdc7b119087a",
"name": "Workflow 1",
"type": "n8n-nodes-base.set",
"position": [
-2620,
-20
],
"parameters": {
"options": []
},
"typeVersion": 3.399999999999999911182158029987476766109466552734375
},
{
"id": "54492842-137b-48d6-851a-1ce6cc751612",
"name": "Workflow 2",
"type": "n8n-nodes-base.set",
"position": [
-2620,
200
],
"parameters": {
"options": []
},
"typeVersion": 3.399999999999999911182158029987476766109466552734375
},
{
"id": "83bbda2c-112b-4ed0-9ccd-c7a5c840100d",
"name": "Workflow 3",
"type": "n8n-nodes-base.set",
"position": [
-2620,
420
],
"parameters": {
"options": []
},
"typeVersion": 3.399999999999999911182158029987476766109466552734375
},
{
"id": "74d889d9-5215-495b-8e60-e1c78d79ae8c",
"name": "Incoming Webhook Data",
"type": "n8n-nodes-base.webhook",
"position": [
-4760,
220
],
"webhookId": "94d08900-4816-4c74-962a-aacff5077d5d",
"parameters": {
"path": "94d08900-4816-4c74-962a-aacff5077d5d",
"options": []
},
"typeVersion": 2
},
{
"id": "cb5e3e72-6678-4efb-8301-f149014444d2",
"name": "Fetch Webhook Data & Declare lockValue",
"type": "n8n-nodes-base.code",
"position": [
-4520,
220
],
"parameters": {
"jsCode": "\/\/ Parse the Slack payload\nconst payload = JSON.parse($('Incoming Webhook Data').first().json[\"body\"][\"payload\"]);\n\n\/\/ Extract button action details\nconst var1 = payload.var1;\nconst var2 = payload.var2;\nconst var3 = payload.var3;\n\n\/\/ Log or return the details\nreturn {\n var1 : var1,\n var2: var2,\n var3: var3,\n lockValue : `${var1}-${var2}-${var3}`\n};"
},
"typeVersion": 2
},
{
"id": "e118f753-945b-4951-95da-394732fc636c",
"name": "Check Redis Lock",
"type": "n8n-nodes-base.redis",
"position": [
-4220,
220
],
"parameters": {
"key": "xyz-lock",
"options": [],
"operation": "get",
"propertyName": "Element"
},
"credentials": {
"redis": {
"id": "o0RxOKCtencIaop1",
"name": "Geoffrey Redis"
}
},
"typeVersion": 1
},
{
"id": "c1488bae-cb82-48ce-94cd-5359d7d10b04",
"name": "Acquire Redis Lock",
"type": "n8n-nodes-base.redis",
"position": [
-3520,
200
],
"parameters": {
"key": "xyz-lock",
"ttl": 180,
"value": "={{ $('Fetch Webhook Data & Declare lockValue').item.json.lookupVariable }}",
"expire": true,
"operation": "set"
},
"credentials": {
"redis": {
"id": "o0RxOKCtencIaop1",
"name": "Geoffrey Redis"
}
},
"typeVersion": 1
},
{
"id": "0fe5e1d8-f1e4-40e0-a3a4-4c00bbf2b50b",
"name": "redisLock existence boolean",
"type": "n8n-nodes-base.if",
"position": [
-4020,
220
],
"parameters": {
"options": [],
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "905501b4-718c-44fb-b2a5-a8eaf8605511",
"operator": {
"type": "string",
"operation": "empty",
"singleValue": true
},
"leftValue": "={{ $json.Element }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.20000000000000017763568394002504646778106689453125
},
{
"id": "3c66fab5-2c2a-4bba-8ba1-ed85e57cd42d",
"name": "redisLock acquired booleans",
"type": "n8n-nodes-base.if",
"position": [
-3800,
320
],
"parameters": {
"options": [],
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "6c071e68-a15a-4da8-b962-fe173b1eb145",
"operator": {
"type": "string",
"operation": "notExists",
"singleValue": true
},
"leftValue": "={{ $json.Element }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.20000000000000017763568394002504646778106689453125
},
{
"id": "787d1c86-1a66-40ea-b8b6-29f50a48737c",
"name": "Poll for lock",
"type": "n8n-nodes-base.wait",
"position": [
-3520,
420
],
"webhookId": "615b4c18-2c29-418c-a2bf-302ff24e5c65",
"parameters": [],
"typeVersion": 1.100000000000000088817841970012523233890533447265625
},
{
"id": "f5b88169-e97b-4359-890e-969dbdc6d829",
"name": "duplicateWebhook boolean",
"type": "n8n-nodes-base.if",
"position": [
-3200,
420
],
"parameters": {
"options": [],
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "08500e34-cc7f-4005-87bd-f7250dc076fe",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $('Fetch Webhook Data & Declare lockValue').item.json.lookupVariable }}",
"rightValue": "={{ $input.first().json.Element }}"
}
]
}
},
"typeVersion": 2.20000000000000017763568394002504646778106689453125
},
{
"id": "db4e4149-7970-402c-a3d7-2cfe47b6a5b7",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-4760,
-120
],
"parameters": {
"color": 6,
"width": 480,
"height": 220,
"content": "#### \ud83d\udd12 This workflow demonstrates Redis-based locking to prevent concurrent execution of workflows.\n\n**Steps:**\n+ Try to acquire a lock via Redis\n+ If successful, execute workflow\n+ If duplicate request; ignore request\n+ Release the lock after completion"
},
"typeVersion": 1
},
{
"id": "879b7ab5-402b-4ea8-977b-64d29cd9bb39",
"name": "Discard Redis Lock",
"type": "n8n-nodes-base.redis",
"position": [
-2320,
200
],
"parameters": {
"key": "n8n-rca-lock",
"operation": "delete"
},
"credentials": {
"redis": {
"id": "o0RxOKCtencIaop1",
"name": "Geoffrey Redis"
}
},
"typeVersion": 1
},
{
"id": "494030d6-e731-4f4f-9193-7b46f2d470d0",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-3580,
80
],
"parameters": {
"color": 5,
"width": 220,
"height": 80,
"content": "Attempts to acquire a lock using Redis by setting a key with expiration."
},
"typeVersion": 1
},
{
"id": "a643b45e-2067-4c42-8c1c-365b3fea911a",
"name": "Workflow Switch",
"type": "n8n-nodes-base.switch",
"position": [
-2880,
200
],
"parameters": {
"rules": {
"values": [
{
"outputKey": "1",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "2761039b-e76c-4606-9aaf-48a569942ab7",
"operator": {
"type": "string",
"operation": "equals"
},
"leftValue": "",
"rightValue": ""
}
]
},
"renameOutput": true
},
{
"outputKey": "2",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "ef07c62f-bd3f-4f54-85b9-9dbf64915f2c",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "",
"rightValue": ""
}
]
},
"renameOutput": true
},
{
"outputKey": "3",
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "2dfc15de-bf33-4c25-932f-dae16758e2e6",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "",
"rightValue": ""
}
]
},
"renameOutput": true
}
]
},
"options": []
},
"typeVersion": 3.20000000000000017763568394002504646778106689453125
},
{
"id": "5531d4c3-158c-4f98-b6fa-9ef9a85eef71",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2940,
680
],
"parameters": {
"color": 5,
"height": 80,
"content": "Skips execution when duplicate request is received."
},
"typeVersion": 1
},
{
"id": "0a159f03-3ecc-4010-ab63-cc24df90df31",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2320,
100
],
"parameters": {
"color": 5,
"height": 80,
"content": "Deletes the Redis lock key to release the lock."
},
"typeVersion": 1
}
],
"connections": {
"Workflow 1": {
"main": [
[
{
"node": "Discard Redis Lock",
"type": "main",
"index": 0
}
]
]
},
"Workflow 2": {
"main": [
[
{
"node": "Discard Redis Lock",
"type": "main",
"index": 0
}
]
]
},
"Workflow 3": {
"main": [
[
{
"node": "Discard Redis Lock",
"type": "main",
"index": 0
}
]
]
},
"Poll for lock": {
"main": [
[
{
"node": "duplicateWebhook boolean",
"type": "main",
"index": 0
}
]
]
},
"Workflow Switch": {
"main": [
[
{
"node": "Workflow 1",
"type": "main",
"index": 0
}
],
[
{
"node": "Workflow 2",
"type": "main",
"index": 0
}
],
[
{
"node": "Workflow 3",
"type": "main",
"index": 0
}
]
]
},
"Check Redis Lock": {
"main": [
[
{
"node": "redisLock existence boolean",
"type": "main",
"index": 0
}
]
]
},
"Acquire Redis Lock": {
"main": [
[
{
"node": "Workflow Switch",
"type": "main",
"index": 0
}
]
]
},
"Incoming Webhook Data": {
"main": [
[
{
"node": "Fetch Webhook Data & Declare lockValue",
"type": "main",
"index": 0
}
]
]
},
"duplicateWebhook boolean": {
"main": [
[
{
"node": "END",
"type": "main",
"index": 0
}
],
[
{
"node": "Check Redis Lock",
"type": "main",
"index": 0
}
]
]
},
"redisLock acquired booleans": {
"main": [
[
{
"node": "Acquire Redis Lock",
"type": "main",
"index": 0
}
],
[
{
"node": "Poll for lock",
"type": "main",
"index": 0
}
]
]
},
"redisLock existence boolean": {
"main": [
[
{
"node": "Acquire Redis Lock",
"type": "main",
"index": 0
}
],
[
{
"node": "redisLock acquired booleans",
"type": "main",
"index": 0
}
]
]
},
"Fetch Webhook Data & Declare lockValue": {
"main": [
[
{
"node": "Check Redis Lock",
"type": "main",
"index": 0
}
]
]
}
}
}