Dolphinscheduler implements offline task management through Directed Acyclic Graphs (DAGs), allowing for various task states like stopping, pausing, and resuming efficiently.
The DAG class in Dolphinscheduler uses three essential data structures: nodesMap for vertex information, edgesMap for edge relationships, and reverseEdgesMap for upstream node identification.
Adding edges in the DAG must avoid creating cycles; the system checks connectivity to prevent invalid edge creation, ensuring the directed nature of the graph is maintained.
The addEdge method prioritizes maintaining the integrity of the DAG by verifying if new edges can be added without forming cycles, logging errors if they cannot.
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