Add redis: Boot 4.1 + Spring Data Redis 4.1, the JDK-serialisation default vs Jackson 3 serializers, @RedisHash TTL and keyspace events, @RedisListener, and Redis as the Spring cache
Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3
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Claude
Executable
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#!/usr/bin/env bash
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# Writes docs/output/17-dependencies.txt: which client and which JSON library actually arrive.
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set -euo pipefail
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cd "$(dirname "$0")/.."
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OUT=docs/output/17-dependencies.txt
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TREE=$(mktemp)
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trap 'rm -f "$TREE"' EXIT
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STARTER_POM=$(ls "$HOME"/.m2/repository/org/springframework/boot/spring-boot-starter-data-redis/*/spring-boot-starter-data-redis-*.pom | head -1)
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mvn -B -q dependency:tree -DoutputFile="$TREE" \
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-Dincludes='io.lettuce,redis.clients,tools.jackson.core,com.fasterxml.jackson.core,org.springframework.data,org.springframework:spring-messaging' >/dev/null
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{
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echo "# What the Redis starter brings, and what it does not"
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echo
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echo "--- The starter's own dependencies (from its pom) ---"
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echo "\$ grep -E 'artifactId|scope' spring-boot-starter-data-redis-*.pom"
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grep -E 'artifactId|scope' "$STARTER_POM" | sed 's/^[ \t]*//'
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echo
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echo "--- The client and JSON libraries in this module (mvn dependency:tree, filtered) ---"
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echo "\$ mvn dependency:tree -Dincludes=io.lettuce,redis.clients,tools.jackson.core,com.fasterxml.jackson.core,org.springframework.data,org.springframework:spring-messaging"
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cat "$TREE"
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echo
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echo "--- The server the tests start ---"
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echo "\$ redis-server --version"
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redis-server --version
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} > "$OUT"
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cat "$OUT"
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#!/usr/bin/env bash
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# Writes docs/output/16-serializers-javap.txt: which serializer classes ship in Spring Data Redis,
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# which are deprecated, what the Jackson 3 ones accept, and which beans Boot 4.1 registers.
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#
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# Reading bytecode is how the article's claims about class names were checked. The reference
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# documentation still shows Jackson 2 class names in places.
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set -euo pipefail
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cd "$(dirname "$0")/.."
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OUT=docs/output/16-serializers-javap.txt
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CP_FILE=$(mktemp)
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trap 'rm -f "$CP_FILE"' EXIT
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mvn -B -q dependency:build-classpath -Dmdep.outputFile="$CP_FILE" >/dev/null
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CP=$(cat "$CP_FILE")
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jar_of() { tr ':' '\n' < "$CP_FILE" | grep "/$1-[0-9]" | head -1; }
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SDR=$(jar_of spring-data-redis)
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BOOT=$(jar_of spring-boot-data-redis)
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S=org.springframework.data.redis.serializer
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run() { # run <display-command> <shell-command>
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echo "\$ $1"
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bash -c "$2" || true
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}
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{
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echo "# Serializer classes in $(basename "$SDR"), read from the jar"
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echo
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echo "--- What ships in org/springframework/data/redis/serializer ---"
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run "unzip -l spring-data-redis-*.jar | grep serializer/ (top-level classes, names only)" \
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"unzip -l '$SDR' | awk '{print \$4}' | grep 'redis/serializer/[A-Za-z0-9]*\.class' | sed 's|.*/||; s|\.class||' | grep -E 'Serializer\$' | sort"
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echo
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echo "--- Which of them are deprecated ---"
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for c in GenericJackson2JsonRedisSerializer Jackson2JsonRedisSerializer GenericJacksonJsonRedisSerializer JacksonJsonRedisSerializer; do
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run "javap -v -cp spring-data-redis-*.jar $S.$c | grep -E 'Deprecated|since'" \
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"javap -v -cp '$SDR' $S.$c | grep -E 'Deprecated|since'"
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echo "(end of output for $c)"
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done
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echo
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echo "--- Jackson 3: what the constructors and factories accept ---"
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run "javap -public -cp <classpath> $S.JacksonJsonRedisSerializer | grep 'JacksonJsonRedisSerializer('" \
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"javap -public -cp '$CP' $S.JacksonJsonRedisSerializer | grep 'JacksonJsonRedisSerializer('"
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run "javap -public -cp <classpath> $S.GenericJacksonJsonRedisSerializer | grep -E 'GenericJacksonJsonRedisSerializer\(|create|builder'" \
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"javap -public -cp '$CP' $S.GenericJacksonJsonRedisSerializer | grep -E 'GenericJacksonJsonRedisSerializer\(|create|builder'"
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echo
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echo "--- Jackson 3: how the generic serializer's builder turns typing on ---"
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run "javap -public -cp <classpath> '$S.GenericJacksonJsonRedisSerializer\$GenericJacksonJsonRedisSerializerBuilder' | grep -E 'Typing|typeValidator|typePropertyName'" \
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"javap -public -cp '$CP' '$S.GenericJacksonJsonRedisSerializer\$GenericJacksonJsonRedisSerializerBuilder' | grep -E 'Typing|typeValidator|typePropertyName'"
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echo
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echo "--- What Boot 4.1 registers ---"
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run "javap -p -cp spring-boot-data-redis-*.jar org.springframework.boot.data.redis.autoconfigure.DataRedisAutoConfiguration | grep -E 'redisTemplate|stringRedisTemplate'" \
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"javap -p -cp '$BOOT' org.springframework.boot.data.redis.autoconfigure.DataRedisAutoConfiguration | grep -E 'redisTemplate|stringRedisTemplate'"
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run "javap -p -cp spring-boot-data-redis-*.jar org.springframework.boot.data.redis.autoconfigure.DataRedisAnnotationDrivenConfiguration | grep 'redisMessageListenerContainer'" \
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"javap -p -cp '$BOOT' org.springframework.boot.data.redis.autoconfigure.DataRedisAnnotationDrivenConfiguration | grep 'redisMessageListenerContainer'"
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echo
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echo "--- Defaults of @EnableRedisRepositories that matter for expiry ---"
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run "javap -v -cp spring-data-redis-*.jar org.springframework.data.redis.repository.configuration.EnableRedisRepositories | grep -A6 -E '(enableKeyspaceEvents|keyspaceNotificationsConfigParameter)\\(\\);' | grep -E '\\(\\);|\"Ex\"|\\.OFF'" \
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"javap -v -cp '$SDR' org.springframework.data.redis.repository.configuration.EnableRedisRepositories | grep -A6 -E '(enableKeyspaceEvents|keyspaceNotificationsConfigParameter)\\(\\);' | grep -E '\\(\\);|\"Ex\"|\\.OFF'"
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echo
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echo "--- The @RedisListener annotation ---"
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run "javap -public -cp spring-data-redis-*.jar org.springframework.data.redis.annotation.RedisListener" \
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"javap -public -cp '$SDR' org.springframework.data.redis.annotation.RedisListener"
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} > "$OUT"
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cat "$OUT"
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Executable
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#!/usr/bin/env bash
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# Regenerates every file under docs/output/.
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#
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# ./scripts/run-all.sh
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#
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# Needs a JDK 25, Maven 3.9, and redis-server and redis-cli (7.x) on the PATH. The tests start a
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# throwaway redis-server on port 6390 and stop it when the JVM exits; they refuse to run if
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# something already listens there, because they call FLUSHALL.
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#
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# Everything except transcripts 16 and 17 comes out of the test suite, so the numbers in the
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# article are assertions that fail the build if they stop being true.
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set -euo pipefail
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cd "$(dirname "$0")/.."
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echo "== test suite (transcripts 01-15)"
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mvn -B test
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echo "== javap transcript (16)"
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./scripts/capture-javap.sh >/dev/null
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echo "== dependency transcript (17)"
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./scripts/capture-dependencies.sh >/dev/null
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echo
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echo "docs/output:"
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ls -1 docs/output
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