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workflow.json
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{
"$id": "https://serverlessworkflow.io/schemas/0.7/workflow.json",
"$schema": "http://json-schema.org/draft-07/schema#",
"description": "Serverless Workflow specification - workflow schema",
"type": "object",
"properties": {
"id": {
"type": "string",
"description": "Workflow unique identifier",
"minLength": 1
},
"key": {
"type": "string",
"description": "Domain-specific workflow identifier",
"minLength": 1
},
"name": {
"type": "string",
"description": "Workflow name",
"minLength": 1
},
"description": {
"type": "string",
"description": "Workflow description"
},
"version": {
"type": "string",
"description": "Workflow version",
"minLength": 1
},
"annotations": {
"type": "array",
"description": "List of helpful terms describing the workflows intended purpose, subject areas, or other important qualities",
"minItems": 1,
"items": {
"type": "string"
},
"additionalItems": false
},
"dataInputSchema": {
"oneOf": [
{
"type": "string",
"description": "URI of the JSON Schema used to validate the workflow data input",
"minLength": 1
},
{
"type": "object",
"description": "Workflow data input schema definition",
"properties": {
"schema": {
"type": "string",
"description": "URI of the JSON Schema used to validate the workflow data input",
"minLength": 1
},
"failOnValidationErrors": {
"type": "boolean",
"default": true,
"description": "Determines if workflow execution should continue if there are validation errors"
}
},
"additionalProperties": false,
"required": [
"schema",
"failOnValidationErrors"
]
}
]
},
"secrets": {
"$ref": "secrets.json#/secrets"
},
"constants": {
"oneOf": [
{
"type": "string",
"format": "uri",
"description": "URI to a resource containing constants data (json or yaml)"
},
{
"type": "object",
"description": "Workflow constants data (object type)"
}
]
},
"start": {
"$ref": "#/definitions/startdef"
},
"specVersion": {
"type": "string",
"description": "Serverless Workflow schema version",
"minLength": 1
},
"expressionLang": {
"type": "string",
"description": "Identifies the expression language used for workflow expressions. Default is 'jq'",
"default": "jq",
"minLength": 1
},
"execTimeout": {
"$ref": "#/definitions/exectimeout"
},
"keepActive": {
"type": "boolean",
"default": false,
"description": "If 'true', workflow instances is not terminated when there are no active execution paths. Instance can be terminated via 'terminate end definition' or reaching defined 'execTimeout'"
},
"metadata": {
"$ref": "common.json#/definitions/metadata"
},
"events": {
"$ref": "events.json#/events"
},
"functions": {
"$ref": "functions.json#/functions"
},
"retries": {
"$ref": "retries.json#/retries"
},
"states": {
"type": "array",
"description": "State definitions",
"items": {
"anyOf": [
{
"title": "Delay State",
"$ref": "#/definitions/delaystate"
},
{
"title": "Event State",
"$ref": "#/definitions/eventstate"
},
{
"title": "Operation State",
"$ref": "#/definitions/operationstate"
},
{
"title": "Parallel State",
"$ref": "#/definitions/parallelstate"
},
{
"title": "Switch State",
"$ref": "#/definitions/switchstate"
},
{
"title": "Inject State",
"$ref": "#/definitions/injectstate"
},
{
"title": "ForEach State",
"$ref": "#/definitions/foreachstate"
},
{
"title": "Callback State",
"$ref": "#/definitions/callbackstate"
}
]
},
"additionalItems": false,
"minItems": 1
}
},
"oneOf": [
{
"required": [
"id",
"specVersion",
"name",
"start",
"states"
]
},
{
"required": [
"key",
"specVersion",
"name",
"start",
"states"
]
}
],
"definitions": {
"crondef": {
"oneOf": [
{
"type": "string",
"description": "Cron expression defining when workflow instances should be created (automatically)",
"minLength": 1
},
{
"type": "object",
"properties": {
"expression": {
"type": "string",
"description": "Repeating interval (cron expression) describing when the workflow instance should be created",
"minLength": 1
},
"validUntil": {
"type": "string",
"description": "Specific date and time (ISO 8601 format) when the cron expression invocation is no longer valid"
}
},
"additionalProperties": false,
"required": ["expression"]
}
]
},
"exectimeout": {
"type": "object",
"properties": {
"duration": {
"type": "string",
"description": "Timeout duration (ISO 8601 duration format)",
"minLength": 1
},
"interrupt": {
"type": "boolean",
"description": "If `false`, workflow instance is allowed to finish its current execution paths. If `true`, current workflow execution is stopped immediately. Default is `true`",
"default": true
},
"runBefore": {
"type": "string",
"description": "Name of a workflow state to be executed before workflow instance is terminated",
"minLength": 1
}
},
"additionalProperties": false,
"required": [
"duration"
]
},
"transition": {
"oneOf": [
{
"type": "string",
"description": "Name of state to transition to",
"minLength": 1
},
{
"type": "object",
"description": "Function Reference",
"properties": {
"nextState": {
"type": "string",
"description": "Name of state to transition to",
"minLength": 1
},
"produceEvents": {
"type": "array",
"description": "Array of events to be produced before the transition happens",
"items": {
"type": "object",
"$ref": "#/definitions/produceeventdef"
},
"additionalItems": false
},
"compensate": {
"type": "boolean",
"default": false,
"description": "If set to true, triggers workflow compensation when before this transition is taken. Default is false"
}
},
"additionalProperties": false,
"required": [
"nextState"
]
}
]
},
"error": {
"type": "object",
"properties": {
"error": {
"type": "string",
"description": "Domain-specific error name, or '*' to indicate all possible errors",
"minLength": 1
},
"code": {
"type": "string",
"description": "Error code. Can be used in addition to the name to help runtimes resolve to technical errors/exceptions. Should not be defined if error is set to '*'",
"minLength": 1
},
"retryRef": {
"type": "string",
"description": "References a unique name of a retry definition.",
"minLength": 1
},
"transition": {
"description": "Transition to next state to handle the error. If retryRef is defined, this transition is taken only if retries were unsuccessful.",
"$ref": "#/definitions/transition"
},
"end": {
"description": "End workflow execution in case of this error. If retryRef is defined, this ends workflow only if retries were unsuccessful.",
"$ref": "#/definitions/end"
}
},
"additionalProperties": false,
"oneOf": [
{
"required": [
"error",
"transition"
]
},
{
"required": [
"error",
"end"
]
}
]
},
"onevents": {
"type": "object",
"properties": {
"eventRefs": {
"type": "array",
"description": "References one or more unique event names in the defined workflow events",
"minItems": 1,
"items": {
"type": "string"
},
"additionalItems": false
},
"actionMode": {
"type": "string",
"enum": [
"sequential",
"parallel"
],
"description": "Specifies how actions are to be performed (in sequence or in parallel)",
"default": "sequential"
},
"actions": {
"type": "array",
"description": "Actions to be performed if expression matches",
"items": {
"type": "object",
"$ref": "#/definitions/action"
},
"additionalItems": false
},
"eventDataFilter": {
"description": "Event data filter",
"$ref": "#/definitions/eventdatafilter"
}
},
"additionalProperties": false,
"required": [
"eventRefs"
]
},
"action": {
"type": "object",
"properties": {
"name": {
"type": "string",
"description": "Unique action definition name"
},
"functionRef": {
"description": "References a function to be invoked",
"$ref": "#/definitions/functionref"
},
"eventRef": {
"description": "References a 'trigger' and 'result' reusable event definitions",
"$ref": "#/definitions/eventref"
},
"subFlowRef": {
"description": "References a sub-workflow to invoke",
"$ref": "#/definitions/subflowref"
},
"timeout": {
"type": "string",
"description": "Time period to wait for function execution to complete (ISO 8601 format)"
},
"actionDataFilter": {
"description": "Action data filter",
"$ref": "#/definitions/actiondatafilter"
}
},
"additionalProperties": false,
"oneOf": [
{
"required": [
"functionRef"
]
},
{
"required": [
"eventRef"
]
},
{
"required": [
"subFlowRef"
]
}
]
},
"functionref": {
"oneOf": [
{
"type": "string",
"description": "Name of the referenced function",
"minLength": 1
},
{
"type": "object",
"description": "Function Reference",
"properties": {
"refName": {
"type": "string",
"description": "Name of the referenced function"
},
"arguments": {
"type": "object",
"description": "Function arguments/inputs"
},
"selectionSet": {
"type": "string",
"description": "Only used if function type is 'graphql'. A string containing a valid GraphQL selection set"
}
},
"additionalProperties": false,
"required": [
"refName"
]
}
]
},
"eventref": {
"type": "object",
"description": "Event References",
"properties": {
"triggerEventRef": {
"type": "string",
"description": "Reference to the unique name of a 'produced' event definition"
},
"resultEventRef": {
"type": "string",
"description": "Reference to the unique name of a 'consumed' event definition"
},
"data": {
"type": [
"string",
"object"
],
"description": "If string type, an expression which selects parts of the states data output to become the data (payload) of the event referenced by 'triggerEventRef'. If object type, a custom object to become the data (payload) of the event referenced by 'triggerEventRef'."
},
"contextAttributes": {
"type": "object",
"description": "Add additional extension context attributes to the produced event",
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false,
"required": [
"triggerEventRef",
"resultEventRef"
]
},
"subflowref": {
"oneOf": [
{
"type": "string",
"description": "Unique id of the sub-workflow to be invoked",
"minLength": 1
},
{
"type": "object",
"description": "Specifies a sub-workflow to be invoked",
"properties": {
"waitForCompletion": {
"type": "boolean",
"default": true,
"description": "Workflow execution must wait for sub-workflow to finish before continuing"
},
"workflowId": {
"type": "string",
"description": "Unique id of the sub-workflow to be invoked"
},
"version": {
"type": "string",
"description": "Version of the sub-workflow to be invoked",
"minLength": 1
}
},
"required": [
"workflowId"
]
}
]
},
"branch": {
"type": "object",
"description": "Branch Definition",
"properties": {
"name": {
"type": "string",
"description": "Branch name"
},
"actions": {
"type": "array",
"description": "Actions to be executed in this branch",
"items": {
"type": "object",
"$ref": "#/definitions/action"
},
"additionalItems": false
}
},
"additionalProperties": false,
"required": [
"name",
"actions"
]
},
"delaystate": {
"type": "object",
"description": "Causes the workflow execution to delay for a specified duration",
"properties": {
"id": {
"type": "string",
"description": "Unique State id",
"minLength": 1
},
"name": {
"type": "string",
"description": "State name"
},
"type": {
"type": "string",
"const": "delay",
"description": "State type"
},
"end": {
"$ref": "#/definitions/end",
"description": "State end definition"
},
"stateDataFilter": {
"description": "State data filter",
"$ref": "#/definitions/statedatafilter"
},
"timeDelay": {
"type": "string",
"description": "Amount of time (ISO 8601 format) to delay"
},
"onErrors": {
"type": "array",
"description": "States error handling and retries definitions",
"items": {
"type": "object",
"$ref": "#/definitions/error"
},
"additionalItems": false
},
"transition": {
"description": "Next transition of the workflow after the time delay",
"$ref": "#/definitions/transition"
},
"compensatedBy": {
"type": "string",
"minLength": 1,
"description": "Unique Name of a workflow state which is responsible for compensation of this state"
},
"usedForCompensation": {
"type": "boolean",
"default": false,
"description": "If true, this state is used to compensate another state. Default is false"
},
"metadata": {
"$ref": "common.json#/definitions/metadata"
}
},
"additionalProperties": false,
"if": {
"properties": {
"usedForCompensation": {
"const": true
}
},
"required": ["usedForCompensation"]
},
"then": {
"required": [
"name",
"type",
"timeDelay"
]
},
"else": {
"oneOf": [
{
"required": [
"name",
"type",
"timeDelay",
"end"
]
},
{
"required": [
"name",
"type",
"timeDelay",
"transition"
]
}
]
}
},
"eventstate": {
"type": "object",
"description": "This state is used to wait for events from event sources, then consumes them and invoke one or more actions to run in sequence or parallel",
"properties": {
"id": {
"type": "string",
"description": "Unique State id",
"minLength": 1
},
"name": {
"type": "string",
"description": "State name"
},
"type": {
"type": "string",
"const": "event",
"description": "State type"
},
"exclusive": {
"type": "boolean",
"default": true,
"description": "If true consuming one of the defined events causes its associated actions to be performed. If false all of the defined events must be consumed in order for actions to be performed"
},
"onEvents": {
"type": "array",
"description": "Define the events to be consumed and optional actions to be performed",
"items": {
"type": "object",
"$ref": "#/definitions/onevents"
},
"additionalItems": false
},
"timeout": {
"type": "string",
"description": "Time period to wait for incoming events (ISO 8601 format)"
},
"stateDataFilter": {
"description": "State data filter",
"$ref": "#/definitions/statedatafilter"
},
"onErrors": {
"type": "array",
"description": "States error handling and retries definitions",
"items": {
"type": "object",
"$ref": "#/definitions/error"
},
"additionalItems": false
},
"transition": {
"description": "Next transition of the workflow after all the actions have been performed",
"$ref": "#/definitions/transition"
},
"end": {
"$ref": "#/definitions/end",
"description": "State end definition"
},
"compensatedBy": {
"type": "string",
"minLength": 1,
"description": "Unique Name of a workflow state which is responsible for compensation of this state"
},
"metadata": {
"$ref": "common.json#/definitions/metadata"
}
},
"additionalProperties": false,
"oneOf": [
{
"required": [
"name",
"type",
"onEvents",
"end"
]
},
{
"required": [
"name",
"type",
"onEvents",
"transition"
]
}
]
},
"operationstate": {
"type": "object",
"description": "Defines actions be performed. Does not wait for incoming events",
"properties": {
"id": {
"type": "string",
"description": "Unique State id",
"minLength": 1
},
"name": {
"type": "string",
"description": "State name"
},
"type": {
"type": "string",
"const": "operation",
"description": "State type"
},
"end": {
"$ref": "#/definitions/end",
"description": "State end definition"
},
"stateDataFilter": {
"description": "State data filter",
"$ref": "#/definitions/statedatafilter"
},
"actionMode": {
"type": "string",
"enum": [
"sequential",
"parallel"
],
"description": "Specifies whether actions are performed in sequence or in parallel",
"default": "sequential"
},
"actions": {
"type": "array",
"description": "Actions to be performed",
"items": {
"type": "object",
"$ref": "#/definitions/action"
}
},
"onErrors": {
"type": "array",
"description": "States error handling and retries definitions",
"items": {
"type": "object",
"$ref": "#/definitions/error"
},
"additionalItems": false
},
"transition": {
"description": "Next transition of the workflow after all the actions have been performed",
"$ref": "#/definitions/transition"
},
"compensatedBy": {
"type": "string",
"minLength": 1,
"description": "Unique Name of a workflow state which is responsible for compensation of this state"
},
"usedForCompensation": {
"type": "boolean",
"default": false,
"description": "If true, this state is used to compensate another state. Default is false"
},
"metadata": {
"$ref": "common.json#/definitions/metadata"
}
},
"additionalProperties": false,
"if": {
"properties": {
"usedForCompensation": {
"const": true
}
},
"required": ["usedForCompensation"]
},
"then": {
"required": [
"name",
"type",
"actions"
]
},
"else": {
"oneOf": [
{
"required": [
"name",
"type",
"actions",
"end"
]
},
{
"required": [
"name",
"type",
"actions",
"transition"
]
},
{
"required": [
"name",
"type",
"actions",
"end"
]
}
]
}
},
"parallelstate": {
"type": "object",
"description": "Consists of a number of states that are executed in parallel",
"properties": {
"id": {
"type": "string",
"description": "Unique State id",
"minLength": 1
},
"name": {
"type": "string",
"description": "State name"
},
"type": {
"type": "string",
"const": "parallel",
"description": "State type"
},
"end": {
"$ref": "#/definitions/end",
"description": "State end definition"
},
"stateDataFilter": {
"description": "State data filter",
"$ref": "#/definitions/statedatafilter"
},
"branches": {
"type": "array",
"description": "Branch Definitions",
"items": {
"type": "object",
"$ref": "#/definitions/branch"
},
"additionalItems": false
},
"completionType": {
"type": "string",
"enum": [
"allOf",
"atLeast"
],
"description": "Option types on how to complete branch execution.",
"default": "allOf"
},
"numCompleted": {
"type": [
"number",
"string"
],
"minimum": 0,
"minLength": 0,
"description": "Used when completionType is set to 'atLeast' to specify the minimum number of branches that must complete before the state will transition."
},
"onErrors": {
"type": "array",
"description": "States error handling and retries definitions",
"items": {
"type": "object",
"$ref": "#/definitions/error"
},
"additionalItems": false
},
"transition": {
"description": "Next transition of the workflow after all branches have completed execution",
"$ref": "#/definitions/transition"
},
"compensatedBy": {
"type": "string",
"minLength": 1,
"description": "Unique Name of a workflow state which is responsible for compensation of this state"
},
"usedForCompensation": {
"type": "boolean",
"default": false,
"description": "If true, this state is used to compensate another state. Default is false"
},
"metadata": {
"$ref": "common.json#/definitions/metadata"
}
},
"additionalProperties": false,
"if": {
"properties": {
"usedForCompensation": {
"const": true
}
},
"required": ["usedForCompensation"]
},
"then": {
"required": [
"name",
"type",
"branches"
]
},
"else": {
"oneOf": [
{
"required": [
"name",
"type",
"branches",
"end"
]
},
{
"required": [
"name",
"type",
"branches",
"transition"
]
}
]
}
},
"switchstate": {
"oneOf": [
{
"$ref": "#/definitions/databasedswitch"
},
{
"$ref": "#/definitions/eventbasedswitch"
}
]
},
"eventbasedswitch": {
"type": "object",
"description": "Permits transitions to other states based on events",
"properties": {
"id": {
"type": "string",
"description": "Unique State id",
"minLength": 1
},
"name": {
"type": "string",
"description": "State name"
},
"type": {
"type": "string",
"const": "switch",
"description": "State type"
},
"stateDataFilter": {
"description": "State data filter",
"$ref": "#/definitions/statedatafilter"
},
"eventConditions": {
"type": "array",
"description": "Defines conditions evaluated against events",
"items": {
"type": "object",
"$ref": "#/definitions/eventcondition"
},
"additionalItems": false
},
"onErrors": {
"type": "array",
"description": "States error handling and retries definitions",
"items": {
"type": "object",
"$ref": "#/definitions/error"
},
"additionalItems": false
},
"eventTimeout": {
"type": "string",
"description": "If eventConditions is used, defines the time period to wait for events (ISO 8601 format)"
},
"defaultCondition": {
"description": "Default transition of the workflow if there is no matching data conditions. Can include a transition or end definition",
"$ref": "#/definitions/defaultconditiondef"
},
"compensatedBy": {
"type": "string",
"minLength": 1,
"description": "Unique Name of a workflow state which is responsible for compensation of this state"
},
"usedForCompensation": {
"type": "boolean",
"default": false,
"description": "If true, this state is used to compensate another state. Default is false"
},