Add langgraph4j module: a loan-approval graph with checkpoints and human-in-the-loop on LangGraph4j 1.9.5

Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01RjfyTgmERTWLqzafu34Cth
2026-10-14 06:47:05 +00:00
parent 280cbe7d56
commit 3b52a434f5
13 changed files with 364 additions and 0 deletions
@@ -0,0 +1,14 @@
+__START__    decision=PENDING
+intake       decision=PENDING
+creditCheck  decision=PENDING
+assessRisk   decision=PENDING
+autoApprove  decision=APPROVED
+notify       decision=APPROVED
+__END__      decision=APPROVED
+final decision: APPROVED
+trail:
+  intake: Asha asks for 40000
+  creditCheck: score 850
+  assessRisk: ratio 0.33 -> LOW
+  autoApprove: approved by policy
+  notify: told Asha the result is APPROVED
@@ -0,0 +1,17 @@
+--- first run ---
+__START__    decision=PENDING
+intake       decision=PENDING
+creditCheck  decision=PENDING
+assessRisk   decision=PENDING
+paused, next node: humanReview
+decision while paused: PENDING
+--- resumed after reviewer wrote decision=APPROVED ---
+humanReview  decision=APPROVED
+notify       decision=APPROVED
+__END__      decision=APPROVED
+final decision: APPROVED
+  intake: Ravi asks for 300000
+  creditCheck: score 750
+  assessRisk: ratio 3.33 -> MEDIUM
+  humanReview: reviewer decided APPROVED
+  notify: told Ravi the result is APPROVED
@@ -0,0 +1,8 @@
+checkpoints saved: 6
+  next=__END__      trail-size=5
+  next=notify       trail-size=4
+  next=autoReject   trail-size=3
+  next=assessRisk   trail-size=2
+  next=creditCheck  trail-size=1
+  next=intake       trail-size=0
+final decision: REJECTED
@@ -0,0 +1,2 @@
+thread A: Asha -> APPROVED
+thread B: Mohan -> REJECTED
@@ -0,0 +1,2 @@
+invoke returned a state: true, decision=APPROVED
+getState after the run finished: IllegalStateException: Missing Checkpoint!