#!/usr/bin/env bash
# Disassembles the two methods that decide whether a beforeInvocation=true eviction is deferred.
set -euo pipefail
cd "$(dirname "$0")/.."
M2="${HOME}/.m2/repository/org/springframework"
V=$(mvn -B -q help:evaluate -Dexpression=spring-framework.version -DforceStdout 2>/dev/null | tail -1)
CTX="${M2}/spring-context/${V}/spring-context-${V}.jar"
CS="${M2}/spring-context-support/${V}/spring-context-support-${V}.jar"

{
  echo "# Why beforeInvocation=true is not deferred by TransactionAwareCacheManagerProxy"
  echo
  echo "\$ javap -c -p org.springframework.cache.interceptor.AbstractCacheInvoker   # spring-context-${V}.jar"
  javap -c -p -cp "$CTX" org.springframework.cache.interceptor.AbstractCacheInvoker \
    | grep -v '^Picked up' | awk '/protected void doEvict/,/^$/' | head -14
  echo
  echo "\$ javap -c -p org.springframework.cache.transaction.TransactionAwareCacheDecorator   # spring-context-support-${V}.jar"
  javap -c -p -cp "$CS" org.springframework.cache.transaction.TransactionAwareCacheDecorator \
    | grep -v '^Picked up' | awk '/public void evict\(java.lang.Object\)/,/^$/' | head -14
  javap -c -p -cp "$CS" org.springframework.cache.transaction.TransactionAwareCacheDecorator \
    | grep -v '^Picked up' | awk '/public boolean evictIfPresent/,/^$/' | head -8
  echo
  echo "doEvict(cache, key, true)  -> Cache.evictIfPresent  -> straight to the target cache"
  echo "doEvict(cache, key, false) -> Cache.evict           -> registerSynchronization, runs after commit"
  echo
  echo "spring-framework#23192 reported beforeInvocation=true being swallowed by the"
  echo "transaction-aware decorator. On ${V} it is not: the immediate path uses a method"
  echo "the decorator does not intercept. Note also that the decorator ships in"
  echo "spring-context-support, not spring-context."
} > docs/output/22-decorator-bytecode.txt
echo "wrote docs/output/22-decorator-bytecode.txt"