SpringBoot不会将@autowired repository注入netty类

xriantvc 于 2021-07-06 发布在 Java

关注(0)|答案(2)|浏览(479)

我有一个spring boot应用程序，其结构如下：
com.test（根类）
com.test.jpa（jpa实体和存储库）
com.test.netty（netty tcp服务器）
根类是：

@ComponentScan(basePackages = {"com.test"})
//@EnableJpaRepositories
//@EntityScan
public class MyApplication {
...

netty服务器：

package com.test.netty;

@Service
@Slf4j
public class NettyServer {

    private EventLoopGroup boss = new NioEventLoopGroup();
    private EventLoopGroup work = new NioEventLoopGroup();

    @PostConstruct    
    public void start() {
        ServerBootstrap bootstrap = new ServerBootstrap();
        bootstrap.group(boss, work).channel(NioServerSocketChannel.class).localAddress(new InetSocketAddress(port))
//                  .option(ChannelOption.SO_BACKLOG, 1024)
                .handler(new LoggingHandler(LogLevel.INFO)).childOption(ChannelOption.SO_KEEPALIVE, true)
                .childOption(ChannelOption.TCP_NODELAY, true).childHandler(new ServerChannelInit());
        try {
            ChannelFuture future = bootstrap.bind().sync();
            if (future.isSuccess()) {
                log.info("Netty Server Started!");

            }
        } catch (InterruptedException ie) {
            log.error("Error Initializing Netty Server. Error: " + ie.getMessage());
        }

    }

    @PreDestroy
    public void destroy() throws InterruptedException {
        boss.shutdownGracefully().sync();
        work.shutdownGracefully().sync();
        log.info("Netty Server Shut Down!");
    }

以及：

public class ServerChannelInit extends ChannelInitializer<SocketChannel>{

    @Override
    protected void initChannel(SocketChannel ch) throws Exception {
        ch.pipeline().addLast("mainHandler", new ServiceHandler());

    }

以及：

package com.test.netty;
@Component
public class ServiceHandler extends ChannelInboundHandlerAdapter {

    private SomeEntity en;

    @Autowired
    SomeRepository sr;

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    // Read data and persist some entitys using injected repository

和存储库：

package com.test.jpa;

//@Repository
public interface SomeRepository extends JpaRepository<SomeEntity, BigInteger> {

}

问题是：存储库没有注入com.test.netty类。我在根类和junit测试中使用它，没有任何问题。我将@repository添加到存储库中，并在@enablejparepositories中添加了repo包，但没有任何更改。
有什么想法吗？

Java netty spring-boot jpa

来源：https://stackoverflow.com/questions/64848254/spring-boot-does-not-inject-autowired-repository-into-netty-classes

2条答案

按热度按时间

qojgxg4l1#

我刚刚执行了以下内容，只需添加 @SpringBootApplication 在你的主课上。取消注解 @Repository ```
@SpringBootApplication
public class MyApplication {

public static void main(String[] args) {
    SpringApplication.run(MyApplication.class, args);
}

}

@Repository
public interface SomeRepository extends JpaRepository<Person, BigInteger> {

 void foo();

}

@Component
public class SampleRepo implements SomeRepository{

@Override
public void foo() {
    System.out.println("Called...." );
}

}

@RestController
public class ServiceHandler {

@Autowired
private SomeRepository sr;

@GetMapping("/hello")
public void call(){
    sr.foo();

}

}

真管用！
![](https://i.stack.imgur.com/bKuOu.png)

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ki1q1bka2#

如果你要创建一个 ServiceHandler 当然不会执行依赖注入，而不是使用spring为您创建的bean示例。你需要注射 ServiceHandler 豆成 ServerChannelInit 以及制造 ServerChannelInit 一 @Component 本身：

@Component
public class ServerChannelInit extends ChannelInitializer<SocketChannel>{

    private final ServiceHandler handler;

    public ServerChannelInit(ServiceHandler handler) {
        this.handler = handler;
    }

    @Override
    protected void initChannel(SocketChannel ch) throws Exception {
        ch.pipeline().addLast("mainHandler", handler);

    }
    ...
}

然后注射 ServerChannelInit 进入 NettyServer :

@Service
@Slf4j
public class NettyServer {

    private final ServerChannelInit channelInit;

    public NettyServer(ServerChannelInit channelInit) {
        this.channelInit = channelInit;
    }

    private EventLoopGroup boss = new NioEventLoopGroup();
    private EventLoopGroup work = new NioEventLoopGroup();

    @PostConstruct    
    public void start() {
        ServerBootstrap bootstrap = new ServerBootstrap();
        bootstrap.group(boss, work).channel(NioServerSocketChannel.class).localAddress(new InetSocketAddress(port))
//                  .option(ChannelOption.SO_BACKLOG, 1024)
                .handler(new LoggingHandler(LogLevel.INFO)).childOption(ChannelOption.SO_KEEPALIVE, true)
                .childOption(ChannelOption.TCP_NODELAY, true).childHandler(channelInit);
...
}

赞(0）回复(0）举报 2021-07-06

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SpringBoot不会将@autowired repository注入netty类

2条答案

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