Last active
February 29, 2024 17:22
-
-
Save wolframite/78afb9b6891fe2815252d300020731dd to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package org.entrego.lms.api.service; | |
import static guru.nidi.graphviz.model.Factory.mutGraph; | |
import static guru.nidi.graphviz.model.Factory.node; | |
import static guru.nidi.graphviz.model.Link.to; | |
import guru.nidi.graphviz.attribute.Label; | |
import guru.nidi.graphviz.attribute.Shape; | |
import guru.nidi.graphviz.engine.Format; | |
import guru.nidi.graphviz.engine.Graphviz; | |
import guru.nidi.graphviz.model.MutableGraph; | |
import guru.nidi.graphviz.model.Node; | |
import java.util.HashMap; | |
import java.util.HashSet; | |
import java.util.Map; | |
import java.util.Set; | |
import javax.annotation.PostConstruct; | |
import lombok.Data; | |
import org.entrego.lms.api.config.fsm.Events; | |
import org.entrego.lms.api.config.fsm.States; | |
import org.springframework.http.MediaType; | |
import org.springframework.statemachine.StateMachine; | |
import org.springframework.statemachine.config.StateMachineFactory; | |
import org.springframework.web.bind.annotation.RequestMapping; | |
import org.springframework.web.bind.annotation.ResponseBody; | |
import org.springframework.web.bind.annotation.RestController; | |
@RestController | |
public class DemoService { | |
private final StateMachineFactory<States, Events> stateMachineFactory; | |
private Graphviz graphviz; | |
public DemoService( | |
StateMachineFactory<States, Events> stateMachineFactory) { | |
this.stateMachineFactory = stateMachineFactory; | |
} | |
@PostConstruct | |
public void init() throws Exception { | |
StateMachine<States, Events> stateMachine = stateMachineFactory.getStateMachine(); | |
MutableGraph graph = mutGraph("Order State Machine").setDirected(true); | |
Map<String, Set<GraphVizLink>> graphMap = new HashMap<>(); | |
stateMachine.getStates().forEach( | |
s -> graphMap.put(s.getId().name(), new HashSet<>()) | |
); | |
stateMachine.getTransitions().forEach(t -> { | |
graphMap.get(t.getSource().getId().name()).add( | |
new GraphVizLink(t.getTarget().getId().name(), t.getTrigger().getEvent().name()) | |
); | |
}); | |
graphMap.forEach((key, targetSet) -> { | |
Node node = node(key).with(Shape.RECTANGLE); | |
targetSet.forEach(l -> graph.add( | |
node.link(to(node(l.getTarget())).with(Label.of(l.getLabel().toLowerCase()))) | |
)); | |
}); | |
this.graphviz = Graphviz.fromGraph(graph); | |
} | |
@ResponseBody | |
@RequestMapping(value = "/visualize", consumes = MediaType.ALL_VALUE, produces = "image/svg+xml") | |
public String renderSVG() { | |
return graphviz.render(Format.SVG).toString(); | |
} | |
@Data | |
private static class GraphVizLink { | |
private final String target; | |
private final String label; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment