[Unit]
Description=Signal Batch Aggregation Service
After=network.target
Wants=network-online.target

[Service]
Type=simple
User=root
WorkingDirectory=/home/apps/signal-batch

# JDK 경로 (프로세스별 독립 JDK)
Environment=JAVA_HOME=/home/apps/jdk/jdk-17.0.14+7

# Spring Profile
Environment=SPRING_PROFILES_ACTIVE=prod

# JVM 옵션 — 64코어 Xeon Gold 6430, 250GB RAM
# Heap: 64GB (RAM의 ~26%, 인메모리 캐시 대량 활용)
Environment=JAVA_OPTS="\
-Xms64g -Xmx64g \
-XX:+UseG1GC \
-XX:G1HeapRegionSize=32m \
-XX:MaxGCPauseMillis=200 \
-XX:InitiatingHeapOccupancyPercent=35 \
-XX:G1ReservePercent=15 \
-XX:G1MixedGCCountTarget=8 \
-XX:ParallelGCThreads=24 \
-XX:ConcGCThreads=8 \
-XX:+UseStringDeduplication \
-XX:+ParallelRefProcEnabled \
-XX:+AlwaysPreTouch \
-XX:MaxMetaspaceSize=512m \
-XX:+HeapDumpOnOutOfMemoryError \
-XX:HeapDumpPath=/home/apps/signal-batch/logs/heapdump.hprof \
-XX:+ExitOnOutOfMemoryError \
-Xlog:gc*,gc+ref=debug,gc+heap=debug,gc+age=trace:file=/home/apps/signal-batch/logs/gc.log:time,uptime,level,tags:filecount=5,filesize=100m \
-Dfile.encoding=UTF-8 \
-Duser.timezone=Asia/Seoul \
-Djava.security.egd=file:/dev/./urandom"

ExecStart=/home/apps/jdk/jdk-17.0.14+7/bin/java \
  ${JAVA_OPTS} \
  -jar /home/apps/signal-batch/vessel-batch-aggregation.jar \
  --spring.profiles.active=${SPRING_PROFILES_ACTIVE}

# Graceful shutdown (SIGTERM → Spring Boot shutdown hook)
ExecStop=/bin/kill -TERM $MAINPID
TimeoutStopSec=60
KillMode=mixed
KillSignal=SIGTERM

# 자동 재시작 (OOM 등 비정상 종료 시)
Restart=on-failure
RestartSec=15

# 로그 → journald + 파일 (Spring Boot logback)
StandardOutput=journal
StandardError=journal
SyslogIdentifier=signal-batch

# 리소스 제한
LimitNOFILE=65536
LimitNPROC=4096

[Install]
WantedBy=multi-user.target