fail.txt

gremlin> g.V().coalesce(out(),fail('vertex has no out edges'))
==>v[3]
==>v[2]
==>v[4]
fail() Step Triggered
===========================================================
Message  > vertex has no out edges
Traverser> v[2]
  Bulk   > 1
Traversal> fail()
Parent   > CoalesceStep [.V().coalesce(__.out(),__.fail())]
Metadata > [:]
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gremlin> g.withSideEffect('x',100).V().as('a').out().coalesce(out(),fail('vertex has no out edges'))
fail() Step Triggered
=======================================================================================================
Message  > vertex has no out edges
Traverser> v[3]
  Bulk   > 1
  Sack   > null
  Loops  > [[null:0]]
  S/E    > [x:100]
Traversal> fail()
Parent   > CoalesceStep [.withSideEffect("x",(int) 100).V().as("a").out().coalesce(__.out(),__.fail())]
Metadata > [:]
=======================================================================================================
gremlin> g.withSideEffect('x',100).withPath().V().as('a').out().coalesce(out(),fail('vertex has no out edges'))
fail() Step Triggered
==================================================================================================================
Message  > vertex has no out edges
Traverser> v[3]
  Bulk   > 1
  Sack   > null
  Path   > path[v[1], v[3]]
  Loops  > [[null:0]]
  S/E    > [x:100]
Traversal> fail()
Parent   > CoalesceStep [.withSideEffect("x",(int) 100).withPath().V().as("a").out().coalesce(__.out(),__.fail())]
Metadata > [:]
==================================================================================================================