Workflow: engineer an n8n flow that executes Wait Code Monitor Webhook
Integrations: code, if, noOp, redis, set, stickyNote, switch, wait, webhook

{"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": 3.4}, {"id": "54492842-137b-48d6-851a-1ce6cc751612", "name": "Workflow 2", "type": "n8n-nodes-base.set", "position": [-2620, 200], "parameters": {"options": {}}, "typeVersion": 3.4}, {"id": "83bbda2c-112b-4ed0-9ccd-c7a5c840100d", "name": "Workflow 3", "type": "n8n-nodes-base.set", "position": [-2620, 420], "parameters": {"options": {}}, "typeVersion": 3.4}, {"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": 2.2}, {"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": 2.2}, {"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": 1.1}, {"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": 2.2}, {"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": 3.2}, {"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}]]}}}