Add boot42-preview module: Spring Boot 4.2.0-M2 vs 4.1.1 forwarded headers, AMQP starters, buildpack cache, RestTemplate removal warnings

Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01Gth99spB1CzQmBFofXmU4Z
2026-09-28 08:40:07 +00:00
parent 3e2029ab3a
commit acd63e658b
24 changed files with 608 additions and 0 deletions
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+# Facts read from jars and POMs on Maven Central: nothing here needs a running application.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+M="$HOME/.m2/repository/org/springframework/boot"
+CEN=https://repo1.maven.org/maven2/org/springframework/boot
+W=$(mktemp -d)
+for v in 4.1.1 4.2.0-M2; do for a in spring-boot-maven-plugin spring-boot-buildpack-platform spring-boot-amqp spring-boot-amqp-rabbitmq spring-boot-rabbitmq; do
+  mvn -B -q dependency:get -Dartifact=org.springframework.boot:$a:$v >/dev/null 2>&1 || true
+done; done
+
+{
+  echo "# 03-amqp-starters (POM descriptions and contents straight from Maven Central)"
+  for a in spring-boot-starter-amqp spring-boot-starter-rabbitmq spring-boot-starter-amqp-rabbitmq; do
+    for v in 4.1.1 4.2.0-M2; do
+      for try in 1 2 3 4 5; do
+        code=$(curl -s -o "$W/p.xml" -w '%{http_code}' "$CEN/$a/$v/$a-$v.pom")
+        [ "$code" = 429 ] || break
+        sleep $((try * 3))
+      done
+      if [ "$code" = 200 ]; then
+        d=$(grep -m1 '<description>' "$W/p.xml" | sed 's/ *<[^>]*>//g')
+        dep=$(grep -E '<artifactId>spring-boot-(amqp|rabbitmq|amqp-rabbitmq)</artifactId>' "$W/p.xml" | sed 's/ *<[^>]*>//g' | paste -sd, -)
+        printf '%-34s %-10s HTTP %s  "%s"  -> %s\n' "$a" "$v" "$code" "$d" "$dep"
+      else
+        printf '%-34s %-10s HTTP %s  (does not exist)\n' "$a" "$v" "$code"
+      fi
+    done
+  done
+  echo
+  echo "# auto-configuration each module registers (AutoConfiguration.imports)"
+  for a in spring-boot-amqp spring-boot-rabbitmq spring-boot-amqp-rabbitmq; do
+    for v in 4.1.1 4.2.0-M2; do
+      j="$M/$a/$v/$a-$v.jar"
+      if [ -f "$j" ]; then
+        echo "--- $a $v"; unzip -p "$j" META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports 2>/dev/null | sed 's/^/  /' || true; echo
+      fi
+    done
+  done
+} > output/03-amqp-starters.txt
+
+{
+  echo "# 04-buildpack-cache-classes (javap, spring-boot-buildpack-platform and spring-boot-maven-plugin)"
+  for v in 4.1.1 4.2.0-M2; do
+    echo "--- buildpack-platform $v: classes matching Cache"
+    unzip -l "$M/spring-boot-buildpack-platform/$v/spring-boot-buildpack-platform-$v.jar" | awk '{print $4}' | grep -E 'build/.*Cache' | sed 's#.*/build/#  #'
+  done
+  mkdir -p "$W/bp"
+  unzip -q -o "$M/spring-boot-buildpack-platform/4.2.0-M2/spring-boot-buildpack-platform-4.2.0-M2.jar" 'org/springframework/boot/buildpack/platform/build/*Cache*' -d "$W/bp"
+  unzip -q -o "$M/spring-boot-maven-plugin/4.2.0-M2/spring-boot-maven-plugin-4.2.0-M2.jar" 'org/springframework/boot/maven/*' -d "$W/bp"
+  echo "--- javap Cache (4.2.0-M2)"
+  javap -cp "$W/bp" org.springframework.boot.buildpack.platform.build.Cache 2>/dev/null | sed 's/org.springframework.boot.buildpack.platform.build.//g; s/org.springframework.boot.buildpack.platform.docker.type.//g'
+  for c in 'org.springframework.boot.maven.CacheInfo' 'org.springframework.boot.maven.LocalCacheInfo'; do
+    echo "--- javap $c (4.2.0-M2)"
+    javap -cp "$W/bp" "$c" 2>/dev/null | sed 's/org.springframework.boot.maven.//g; s/org.springframework.boot.buildpack.platform.build.//g'
+  done
+  echo "--- javap -p Image, fields mentioning cache/workspace (4.2.0-M2)"
+  javap -p -cp "$W/bp" org.springframework.boot.maven.Image 2>/dev/null | grep -E '(Cache|buildWorkspace)[a-zA-Z]* [a-zA-Z]+;$' | sed 's/org.springframework.boot.maven.//g'
+} > output/04-buildpack-cache-classes.txt
+
+{
+  echo "# 05-resttemplate-deprecations (javac -Xlint:deprecation on src/broken/UsesRestTemplate.java)"
+  for pom in pom-41.xml pom.xml; do
+    mvn -B -q -f $pom dependency:build-classpath -Dmdep.outputFile="$W/cp.txt" >/dev/null 2>&1
+    label=$([ $pom = pom.xml ] && echo 4.2.0-M2 || echo 4.1.1)
+    echo "--- Spring Boot $label"
+    mkdir -p "$W/out-$label"
+    javac -Xlint:deprecation -d "$W/out-$label" -cp "$(cat "$W/cp.txt")" src/broken/UsesRestTemplate.java 2>&1 | grep -v JAVA_TOOL | sed 's#^src/broken/##' || true
+  done
+} > output/05-resttemplate-deprecations.txt
+
+{
+  echo "# 06-restclient-replacement (javac -Xlint:deprecation on the RestClient version, Spring Boot 4.2.0-M2)"
+  mvn -B -q dependency:build-classpath -Dmdep.outputFile="$W/cp.txt" >/dev/null 2>&1
+  mkdir -p "$W/out-rc"
+  javac -Xlint:deprecation -Xlint:removal -d "$W/out-rc" -cp "$(cat "$W/cp.txt")" src/main/java/com/ankurm/boot42/RestClientReplacement.java 2>&1 | grep -v JAVA_TOOL | sed 's#^src/main/java/com/ankurm/boot42/##' || true
+  echo "javac finished; lines above this one are warnings (none means a clean compile)"
+} > output/06-restclient-replacement.txt
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# Regenerates every file under output/. Needs JDK 25 and Maven 3.9 with network access to Maven Central.
+#   ./scripts/run-all.sh
+# 01-02 come from the test suite (run on 4.2.0-M2, then on 4.1.1 via pom-41.xml, which writes the *-on-4.1.1 files).
+# 03-06 come from jars, POMs and javac. Port numbers are random, so the transcripts print "<random>".
+set -euo pipefail
+cd "$(dirname "$0")/.."
+mvn -B test
+mvn -B -f pom-41.xml test
+./scripts/capture-facts.sh
+ls -1 output