eva.admin.graph.alpha — com.workiva/eva 2.0.4

Provides a basic implementation for migration handled through a flowgraph

->parent clj

(->parent node)

careful-create-node! clj

(careful-create-node! store n)

handle-node clj multimethod

migration-context clj

(migration-context store)

migration-graph clj

(migration-graph context)

MigrationContext clj protocol

handle-seen clj

(handle-seen this k)

Update the migration context for a node that we expect to be newly seen

maybe-writable clj

(maybe-writable this k)

Given a node key, update the ledger to note that it can be written provided all of its children are written.

note-state clj

(note-state this k state)

Update the node state in the ledger to (max current-state state)

process-parent clj

(process-parent this parent-node-info parent-k children-ks)

If the provided parent node has any children which are not yet written, note them as such and add the node itself to the context to await release once the nodes' children have been written.

ledger clj

(ledger this k)

The ledger is a map from all node keys that the migration context has seen to the most advanced state we know the node to be in, as per 'node-states'

handle-written clj

(handle-written this k)

Update the migration context to note that the provided node has been written

maybe-release-parents clj

(maybe-release-parents this k)

Given the key of a written node, check the set parents of the node. If any are releasable, remove the nodes from the awaiting-parents and add them as released-parents

at-state? clj

(at-state? this k state)

Returns true if the node is in the ledger at a state >= the provided state.

handle-new clj

(handle-new this k)

Update the migration context for a node that we expect to be new

node-info-comparator clj

node-states clj

state-comp clj

(state-comp x1 x2)

state-order clj

state-priority clj

states-set clj

transitioned? clj

(transitioned? [ledger-before ledger-after] k state)