当调用pipeline_tree=builder.build_tree()之后，我们可快速获得pipeline流程对应的生成树，生成树对应的字段和含义如下：
pipeline_tree:
description: The builded tree of bamboo engine
type: dict
properties:
id:
description: The uuid of tree
type: string
start_event:
description: The start event node of tree
type: dict
properties:
id:
description: The uuid of start event node
type: string
incoming:
description: The incoming flow of start event node
type: string
name:
description: The name of start event node
type: string
outgoing:
description: The outgoing flow of start event node
type: string
type:
description: The node type of start event node
type: string
end_event:
description: The end event node of tree
type: dict
properties:
id:
description: The uuid of end event node
type: string
incoming:
description: The incoming flows of end event node
type: list[string]
name:
description: The name of end event node
type: string
outgoing:
description: The outgoing flow of end event node
type: string
type:
description: The node type of end event node
type: string
activities:
description: The activity nodes in pipeline
type: dict
properties:
$node_id:
description: The activity node
properties:
id:
description: The uuid of activity node
type: string
name:
description: The name of activity node
type: string
incoming:
description: The incoming flows of activity node
type: list[string]
outgoing:
description: The outgoing flow of activity node
type: string
type:
description: The node type of activity node
type: string
error_ignore:
description: If the failure of node be ignored
type: boolean
optional:
description: If the node can be excluded when executing
type: boolean
retryable:
description: If the node can be retried
type: boolean
skippable:
description: If the node can be skipped
type: boolean
timeout:
description: Deprecated field
component:
description: The component which defines the activity of the node
type: dict
properties:
code:
description: The unique code of the component
type: string
inputs:
description: The inputs defined in the component
type: dict
flows:
description: The flows in pipeline
type: dict
properties:
$flow_id:
description: The flow
type: dict
properties:
id:
description: The uuid of flow
type: string
source:
description: The node id which is the source of flow
type: string
target:
description: The node id which is the target of flow
type: string
is_default:
description: Deprecated field
gateways:
description: The gateways in pipeline
type: dict
properties:
$gateway_id:
description: The gateway
type: dict
properties:
id:
description: The uuid of gateway
type: string
name:
description: The name of gateway
type: string
outgoing:
description: The outgoing flows of gateway
type: list
data:
description: pipeline data
type: dict
properties:
inputs:
description: The inputs of pipeline
type: dict
outputs:
description: The outputs of pipeline
type: list下面是一个流程树生成之后的示例：
{
"activities": {
"eb456a70affdf47ae9d96c5d196d36b09": {
"component": {
"code": "example_component",
"inputs": {}
},
"error_ignorable": false,
"id": "eb456a70affdf47ae9d96c5d196d36b09",
"incoming": [
"f216d744eae614b71b3ca88002fe81439"
],
"name": "",
"optional": false,
"outgoing": "f42b0a808b63f4315bb9b51159617797c",
"retryable": true,
"skippable": true,
"timeout": null,
"type": "ServiceActivity"
}
},
"data": {
"inputs": {},
"outputs": []
},
"end_event": {
"id": "e1f45d04d298a4a1e8510fb6d7dd496d2",
"incoming": [
"f42b0a808b63f4315bb9b51159617797c"
],
"name": "",
"outgoing": "",
"type": "EmptyEndEvent"
},
"flows": {
"f216d744eae614b71b3ca88002fe81439": {
"id": "f216d744eae614b71b3ca88002fe81439",
"is_default": false,
"source": "e817acc99284348cf9caa45fe0dd0cff4",
"target": "eb456a70affdf47ae9d96c5d196d36b09"
},
"f42b0a808b63f4315bb9b51159617797c": {
"id": "f42b0a808b63f4315bb9b51159617797c",
"is_default": false,
"source": "eb456a70affdf47ae9d96c5d196d36b09",
"target": "e1f45d04d298a4a1e8510fb6d7dd496d2"
}
},
"gateways": {},
"id": "pa08352b3bded40768f90912731820b87",
"start_event": {
"id": "e817acc99284348cf9caa45fe0dd0cff4",
"incoming": "",
"name": "",
"outgoing": "f216d744eae614b71b3ca88002fe81439",
"type": "EmptyStartEvent"
}
}