APM Inferred spans

[cauemarcondes]

• Create mock data with inferred spans
• Create storybook

for elastic/apm#247

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[felixbarny]

We've caught some more edge cases in the Java agent which is why there's a bit of a delay.

Question: can the UI handle the case where a span has child_ids set which are not immediate children?

[1           ]
 [a         ]   <- has child_ids: [2, 3], even though only 2 is a direct child
  [b][2    ]
      [3  ]
       [c]

[cauemarcondes]

Question: can the UI handle the case where a span has child_ids set which are not immediate children?

@felixbarny how can I differentiate ids 2 and 3?

[felixbarny]

Not sure I understand what you mean. With child_ids: [2, 3] I mean that the span, which is denoted with a in the diagram, has two child ids: The id belonging to the spans denoted with 2 and 3. Where you might expect only one child id - the one of span 2.

[cauemarcondes]

What I meant is if the span a has child.ids = [2, 3] but only the span 2 is the direct child of a, what's the logic that I should apply to not reparent the span 3?

[felixbarny]

I've fixed it in the Java agent: elastic/apm-agent-java@5b4ff72