Add library-management module: console app evolved into a Spring Boot 4 REST API

Stage 2 console classes and the shared LoanPolicy, then a Spring Boot 4.1.2 + JPA API (H2, @Version optimistic locking, problem+json errors). Tests write output/ transcripts while asserting the same numbers; scripts regenerate everything. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b4DPL6dtpFg4U4LHc2
2026-11-14 21:21:16 +05:30
parent b9aeb78b24
commit 26ece9cc9b
38 changed files with 1444 additions and 0 deletions
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Starts the API with Hibernate SQL logging, performs one borrow, and prints only the SQL that
+# the borrow produced. Look for "version" in the UPDATE: that is optimistic locking at work.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+mvn -B -q -DskipTests package
+LOG=/tmp/library-sql.log
+setsid nohup java -jar target/library-management-1.0.0.jar --server.port=8081 --logging.level.org.hibernate.SQL=DEBUG > "$LOG" 2>&1 < /dev/null &
+for _ in $(seq 1 60); do curl -s -o /dev/null localhost:8081/api/books && break; sleep 1; done
+J='Content-Type: application/json'
+curl -s -o /dev/null -H "$J" -d '{"isbn":"978-0134685991","title":"Effective Java","author":"Joshua Bloch","copies":2}' localhost:8081/api/books
+curl -s -o /dev/null -H "$J" -d '{"name":"Asha","email":"[email protected]"}' localhost:8081/api/members
+START=$(wc -l < "$LOG")
+curl -s -o /dev/null -H "$J" -d '{"memberId":1,"bookId":1}' localhost:8081/api/loans
+sleep 1
+tail -n +"$((START + 1))" "$LOG" | grep 'org.hibernate.SQL' | sed -E 's/^.*org.hibernate.SQL +: //'
+scripts/stop.sh