Service - Unit Manager

Overview

Each tracked unit is handled by a Service - Unit (handlers) service.

The Unit Manager service handles shared orchestration of the Unit Handler services and the base unit objectType.

Repository

https://bitbucket.org/izara-supply-units/izara-supply-units-unit-manager

DynamoDB tables

UnitRecord

Records which Handler manages each unit

{
	unitId
	unitHandlerServiceNameTag
}

• partition key: unitId
• sort key: (none)

objectSchemas

{
	objectType: "unit",
	storageResources:{
		"xxx":{
			storageType: "graph",
			graphServerTag: "xx",
		}
	},
	fieldNames: {
		unitId: {
			type: "string",
            randomOnCreate: true
		},
	},
	identifiers: [
		{
			fieldName: "unitId"
		},
	]
},

relationshipSchemas

[
  {
    "unitOwnedByUser": {
      storageResources:{
		"xxx":{
			storageType: "graph",
			graphServerTag: "xx",
		}
      },
      links: [
        {
          storageResourceTags: ["xxx"],
          canDelete: true,
          from: {
            objType: {
              serviceTag: "unitManager",
              objectType: "unit"
            },
            linkType: "many",
          },
          to: {
            objType: {
              serviceTag: "user",
              objectType: "user"
            },
            linkType: "one",
          }
        }
      ]
    }
  }
]

• links to the user who currently owns the unit

[
  {
    "unitPreviouslyOwnedByUser": {
		storageResources:{
			"xxx":{
				storageType: "graph",
				graphServerTag: "xx",
			}
		},
		fieldNames: {
			"fromTimestamp": {
			  type: "timestamp",
			  requiredOnCreate: true,
			},
			"toTimestamp": {
			  type: "timestamp",
			  requiredOnCreate: true,
			}
		},      
		links: [
			{
			  storageResourceTags: ["xxx"],
			  from: {
				objType: {
				  serviceTag: "unitManager",
				  objectType: "unit"
				},
				linkType: "many",
			  },
			  to: {
				objType: {
				  serviceTag: "user",
				  objectType: "user"
				},
				linkType: "many",
			  }
			}
		]
    }
  }
]

• links to users who previously owned the unit
• method of creating this link will be similar to versionedData, creating a new unitOwnedByUser relationship at the same time as creating a new unitPreviouslyOwnedByUser relationship

Ownership

• Each Unit is owned by one user, who can transfer ownership to another user
• Owner can set user level permissions for other users to manage their units, like any other user owned object
• New owner needs to accept ownership transfer for it to complete (in future could setup automatic accepatance configuration)
• Existing permissions can transfer across, and need to be managed by new owner

Working documents

Unit Manager