#concurrent

웹소켓 + Stomp로 채팅 기능을 구현하며

RabbitMQ를 도입하였습니다. 도입의 이유는 스프링 내장 메시지 브로커를 이용하게 되면 인메모리 기반의 동작 방식으로 인해 서버 문제 발생 시 메시지가 유실되거나 확장에도 제한이 있다고 판단하여 도입하였습니다. 현직자 분들이 보기에 이 이유가 적합한 근거가 될까요? 추가로 JMeter로 RabbitMQ를 사용했을 때와 사용하지 않았을 때의 성능을 비교했는데 사용자 100명 기준 성능도 사용하지 않았을 때가 우세했고, RabbitMQ를 사용했을 때는 오히려 아래와 같은 오류가 가끔 발생하며 메시지또한 약 90퍼센트 정도만 저장된걸 확인할 수 있었습니다. 무엇이 문제이며 해결 방안이 있을까요?? java.net.SocketException: Connection reset at java.base/sun.nio.ch.SocketChannelImpl.throwConnectionReset(SocketChannelImpl.java:394) ~[na:na] at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:426) ~[na:na] at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:255) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final] at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1132) ~[netty-buffer-4.1.114.Final.jar:4.1.114.Final] at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:356) ~[netty-transport-4.1.114.Final.jar:4.1.114.Final] at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151) ~[netty-transport-4.1.114.Final.jar:4.1.114.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788) ~[netty-transport-4.1.114.Final.jar:4.1.114.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724) ~[netty-transport-4.1.114.Final.jar:4.1.114.Final] at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650) ~[netty-transport-4.1.114.Final.jar:4.1.114.Final] at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562) ~[netty-transport-4.1.114.Final.jar:4.1.114.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.114.Final.jar:4.1.114.Final] at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.114.Final.jar:4.1.114.Final] at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.114.Final.jar:4.1.114.Final] at java.base/java.lang.Thread.run(Thread.java:842) ~[na:na]

Jpa 커스텀 리포지토리 다중 상속 문제

커스텀 리포지토리 사용중 문제가 발생하여 질문 드립니다. @Repository public interface UserRepository extends JpaRepository<User, Long>, CustomRepository { Optional<User> findByUserId(String userId); } public interface CustomRepository { Long search(User user); } public class ACustomRepositoryImpl implements CustomRepository { @Override public Long search(User user) { return 1L; } } 이런식으로 코드를 작성하고 실행 시키면 아래와 같은 에러 메시지가 나옵니다. 그런데 ACustomRepositoryImpl 구현체 이름을 CustomRepositoryImpl 이렇게 바꾸면 정상적으로 실행됩니다. 명명규칙이 그저 개발자들 간의 약속 인줄 알았는데 규칙을 무조건 지켜야 하는 건지 궁금하여 질문 드렸습니다. Caused by: org.springframework.data.mapping.PropertyReferenceException: No property 'search' found for type 'User' at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:90) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:443) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:419) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.lambda$from$0(PropertyPath.java:372) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:330) ~[na:na] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:354) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:332) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new$0(PartTree.java:259) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:260) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$Predicate.lambda$new$0(PartTree.java:389) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:390) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:100) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:100) ~[spring-data-jpa-3.2.2.jar:3.2.2] ... 79 common frames omitted

JpaRepository 다중상속 오류

JpaRepository에 다중상속으로 CustomRepository를 상속하려고 합니다. 근데 자꾸 에러가 나서 질문 드립니다. @Repository public interface UserRepository extends JpaRepository<User, Long>, CustomRepository { Optional<User> findByUserId(String userId); } public interface CustomRepository { void search(); } 에러 메시지 ========================================================= Caused by: org.springframework.data.mapping.PropertyReferenceException: No property 'search' found for type 'User' at org.springframework.data.mapping.PropertyPath.<init>(PropertyPath.java:90) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:443) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:419) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.lambda$from$0(PropertyPath.java:372) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:330) ~[na:na] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:354) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:332) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.Part.<init>(Part.java:81) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$OrPart.lambda$new$0(PartTree.java:259) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$OrPart.<init>(PartTree.java:260) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree$Predicate.lambda$new$0(PartTree.java:389) ~[spring-data-commons-3.2.2.jar:3.2.2] at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[na:na] at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[na:na] at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[na:na] at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[na:na] at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[na:na] at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921) ~[na:na] at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:na] at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682) ~[na:na] at org.springframework.data.repository.query.parser.PartTree$Predicate.<init>(PartTree.java:390) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.repository.query.parser.PartTree.<init>(PartTree.java:100) ~[spring-data-commons-3.2.2.jar:3.2.2] at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.<init>(PartTreeJpaQuery.java:100) ~[spring-data-jpa-3.2.2.jar:3.2.2] ... 79 common frames omitted