spring-boot-demo/batch-5-to-6/scripts/run-all.sh

#!/usr/bin/env bash
# Regenerates output/*.txt. Needs Maven, JDK 21 (J21) and JDK 25 (J25); network for Maven Central.
set -u
HERE=$(cd "$(dirname "$0")/.." && pwd); OUT=$HERE/output; W=${WORK:-/tmp/b56-work}
J21=${J21:-/usr/lib/jvm/java-21-openjdk-amd64}; J25=${J25:-/tmp/tools/jdk-25.0.4.1+1}; MVN=${MVN:-mvn}
mkdir -p "$OUT"; rm -rf "$W"; mkdir -p "$W"
mv_() { local jh=$1 d=$2; shift 2; (cd "$d" && JAVA_HOME=$jh $MVN -B -Dmaven.compiler.showDeprecation=true "$@" 2>&1 | grep -v JAVA_TOOL_OPTIONS | sed "s#$W/##g"); }
runjar() { local jh=$1 jar=$2; JAVA_HOME=$jh $jh/bin/java -jar "$jar" 2>&1 | grep -E '^(WRITE|CHUNK|STATUS|INSTANCES|DONE)'; }
stage() { rm -rf "$W/$1"; cp -r "$HERE/$2" "$W/$1"; rm -rf "$W/$1/target"; }
PORT_IMPORTS=$(cat <<'PY'
import glob,sys
m={'org.springframework.batch.core.ChunkListener':'org.springframework.batch.core.listener.ChunkListener',
'org.springframework.batch.core.Job;':'org.springframework.batch.core.job.Job;',
'org.springframework.batch.core.Step;':'org.springframework.batch.core.step.Step;',
'org.springframework.batch.core.JobExecution;':'org.springframework.batch.core.job.JobExecution;',
'org.springframework.batch.core.JobParameters;':'org.springframework.batch.core.job.parameters.JobParameters;',
'org.springframework.batch.core.JobParametersBuilder':'org.springframework.batch.core.job.parameters.JobParametersBuilder',
'org.springframework.batch.core.explore.JobExplorer':'org.springframework.batch.core.repository.explore.JobExplorer',
'org.springframework.batch.item.':'org.springframework.batch.infrastructure.item.'}
for f in glob.glob(sys.argv[1]+'/src/**/*.java',recursive=True):
    s=open(f).read()
    for a,b in m.items(): s=s.replace(a,b)
    open(f,'w').write(s)
PY
)
# 01 legacy: Boot 3.5.16 / Batch 5.2.6
stage s0 legacy
{ echo '$ mvn test   # Boot 3.5.16, Batch 5.2.6, JDK 21'; mv_ "$J21" "$W/s0" package | grep -E 'Tests run:|BUILD'
  echo; echo '$ java -jar target/batch-legacy-1.0.0.jar'; runjar "$J21" "$W/s0/target/batch-legacy-1.0.0.jar"; } > "$OUT/01-legacy-batch5.txt"
# 02 same sources, Boot 4.1.1
stage s1 legacy; sed -i 's/3.5.16/4.1.1/; s/<java.version>21/<java.version>25/' "$W/s1/pom.xml"
{ echo '$ mvn compile   # legacy sources, only the Boot version changed to 4.1.1 (Batch 6.0.5)'
  mv_ "$J25" "$W/s1" compile > "$W/s1.log"
  echo "compile error lines reported: $(grep -c '^\[ERROR\] .*\.java' "$W/s1.log")"; echo; echo 'packages that no longer exist:'
  grep -oE 'package [a-z.]+ does not exist' "$W/s1.log" | sort -u; echo; echo 'classes that moved:'
  grep -oE 'symbol: +class [A-Za-z]+' "$W/s1.log" | awk '{print $3}' | sort -u | tr '\n' ' '; echo; } > "$OUT/02-compile-errors-after-bump.txt"
# 03 imports ported, dependencies untouched
cp -r "$W/s1" "$W/s2"; rm -rf "$W/s2/target"; python3 -c "$PORT_IMPORTS" "$W/s2"
{ echo '$ mvn package   # imports ported to the new packages, dependencies unchanged (spring-boot-starter-batch)'
  mv_ "$J25" "$W/s2" -DskipTests package | grep -E 'WARNING.*\.java|BUILD|ERROR.*\.java'
  echo; echo '$ java -jar target/batch-legacy-1.0.0.jar'
  JAVA_HOME=$J25 $J25/bin/java -jar "$W/s2/target/batch-legacy-1.0.0.jar" 2>&1 | grep -A6 'APPLICATION FAILED'; } > "$OUT/03-imports-ported-no-transaction-manager.txt"
# 04 + JDBC starter
cp -r "$W/s2" "$W/s3"; rm -rf "$W/s3/target"; python3 - "$W/s3/pom.xml" <<'PY'
import sys; p=sys.argv[1]; s=open(p).read()
s=s.replace('<artifactId>spring-boot-starter-batch</artifactId></dependency>','<artifactId>spring-boot-starter-batch-jdbc</artifactId></dependency>\n    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency>')
open(p,'w').write(s)
PY
{ echo '$ mvn package   # + spring-boot-starter-batch-jdbc and spring-boot-starter-jdbc'
  mv_ "$J25" "$W/s3" package | grep -E 'WARNING.*\.java|Tests run:|BUILD'
  echo; echo '$ java -jar target/batch-legacy-1.0.0.jar'; runjar "$J25" "$W/s3/target/batch-legacy-1.0.0.jar"; } > "$OUT/04-jdbc-starter-added.txt"
# 05 new chunk API but old listener
cp -r "$W/s3" "$W/s4"; rm -rf "$W/s4/target"; sed -i 's/\.<Integer, String>chunk(3, tx)/.<Integer, String>chunk(3)\n                .transactionManager(tx)/' "$W/s4/src/main/java/com/ankurm/batch/BatchConfig.java"
{ echo '$ mvn package   # chunk(3, tx) replaced by chunk(3).transactionManager(tx); listener untouched'
  mv_ "$J25" "$W/s4" -DskipTests package | grep -E 'WARNING.*\.java|BUILD|ERROR.*\.java'
  echo; echo '$ java -jar target/batch-legacy-1.0.0.jar'; runjar "$J25" "$W/s4/target/batch-legacy-1.0.0.jar"; } > "$OUT/05-new-chunk-api-listener-silent.txt"
# 06 final migrated
stage m migrated
{ echo '$ mvn package   # final migrated project'
  mv_ "$J25" "$W/m" package | grep -E 'WARNING.*\.java|Tests run:|BUILD'
  echo; echo '$ java -jar target/batch-migrated-1.0.0.jar'; runjar "$J25" "$W/m/target/batch-migrated-1.0.0.jar"; } > "$OUT/06-migrated.txt"
# 07 API facts from the jars
M2=${M2:-$HOME/.m2/repository/org/springframework/batch}
CP=$M2/spring-batch-core/6.0.5/spring-batch-core-6.0.5.jar:$M2/spring-batch-infrastructure/6.0.5/spring-batch-infrastructure-6.0.5.jar:$M2/spring-batch-test/6.0.5/spring-batch-test-6.0.5.jar
{ echo '$ javap (Batch 6.0.5 jars), selected lines'
  for c in org.springframework.batch.core.launch.JobOperator org.springframework.batch.core.repository.JobRepository org.springframework.batch.test.JobOperatorTestUtils; do env -u JAVA_TOOL_OPTIONS $J25/bin/javap -cp $CP $c 2>&1 | grep -E '^public (interface|class)' | sed 's/org\.springframework\.batch\.//g'; done
  env -u JAVA_TOOL_OPTIONS $J25/bin/javap -cp $CP org.springframework.batch.core.step.builder.StepBuilder 2>&1 | grep -E ' chunk\(' | sed 's/org\.springframework\.batch\.//g; s/org\.springframework\.transaction\.//g; s/org\.springframework\.//g'
  env -u JAVA_TOOL_OPTIONS $J25/bin/javap -cp $CP org.springframework.batch.core.listener.ChunkListener 2>&1 | grep -E 'Chunk(Context|<)' | sed 's/org\.springframework\.batch\.//g'; } > "$OUT/07-api-facts.txt"
echo done