#!/usr/bin/env bash
# All seven propagation values, each called with and without an outer transaction.
set -euo pipefail
set +m
cd "$(dirname "$0")/.."
source scripts/env.sh
{
  echo "== the propagation matrix =="
  echo
  echo "Each inner method is called twice: once from a @Transactional caller and once from a"
  echo "plain one. 'active' is TransactionSynchronizationManager.isActualTransactionActive();"
  echo "'name' is the transaction's name, which is how you tell JOINING from STARTING -- a"
  echo "joining method reports the OUTER method's name."
  echo
  start_app > /dev/null
  curl -s "http://127.0.0.1:${APP_PORT}/tx/propagation" | python3 -c '
import json,sys
d=json.load(sys.stdin)
print("  %-14s %-24s %-8s %s" % ("PROPAGATION","CALLER","ACTIVE","TRANSACTION NAME / OUTCOME"))
print("  " + "-"*76)
for name,row in d.items():
    for ctx,label in (("withOuterTransaction","inside @Transactional"),
                      ("withoutOuterTransaction","no transaction")):
        v=row[ctx]
        if "exception" in v:
            print("  %-14s %-24s %-8s %s" % (name, label, "--", v["exception"].split(".")[-1]))
        else:
            i=v["inner"]
            print("  %-14s %-24s %-8s %s" % (name, label, i["actualTransactionActive"],
                  str(i["transactionName"]).split(".")[-1]))
    print()'
  echo
  echo "Reading it:"
  echo "  REQUIRED      inside a transaction the inner name is the OUTER method -- it joined."
  echo "  REQUIRES_NEW  the inner name is its own method -- it started a second transaction."
  echo "  NESTED        fails outright on JpaTransactionManager. See docs/output/03-nested.txt."
  echo "  SUPPORTS      joins if there is one, runs with none if there is not. No transaction"
  echo "                is created, so the write below it lands on an auto-commit connection."
  echo "  NOT_SUPPORTED suspends the outer transaction: active=False even inside one."
  echo "  MANDATORY     requires a caller's transaction; IllegalTransactionStateException if none."
  echo "  NEVER         requires the absence of one; IllegalTransactionStateException if present."
  echo
  echo "== the exact exception messages =="
  curl -s "http://127.0.0.1:${APP_PORT}/tx/propagation" | python3 -c '
import json,sys
for name,row in json.load(sys.stdin).items():
    for ctx in ("withOuterTransaction","withoutOuterTransaction"):
        v=row[ctx]
        if "exception" in v:
            print("  %s (%s)" % (name, ctx))
            print("    %s" % v["exception"])
            print("    %s" % v["message"])
            print()'
  echo "== what the transaction manager logged while doing it =="
  echo
  grep -E "Creating new transaction|Participating in existing|Suspending current|Initiating transaction|Not creating" "$LOG" \
    | tidy | head -24
  stop_app
} > docs/output/01-propagation.txt 2>&1
cat docs/output/01-propagation.txt