java - 带有 Spring 的嵌入式 MongoDB 无法正常工作

Question

我正在尝试使用 WebFlux 和嵌入式 MongoDB 创建一个 Spring 应用程序。然而，即使我的测试运行完美，我也无法启动我的应用程序，因为嵌入式 mongodb 似乎还没有启动。

我得到的异常如下:

com.mongodb.MongoSocketOpenException: Exception opening socket
    at com.mongodb.connection.SocketStream.open(SocketStream.java:62) ~[mongodb-driver-core-3.6.3.jar:na]
    at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:126) ~[mongodb-driver-core-3.6.3.jar:na]
    at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:114) ~[mongodb-driver-core-3.6.3.jar:na]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_144]
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85) ~[na:1.8.0_144]
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_144]
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_144]
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_144]
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.8.0_144]
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_144]
    at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_144]
    at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:59) ~[mongodb-driver-core-3.6.3.jar:na]
    at com.mongodb.connection.SocketStream.open(SocketStream.java:57) ~[mongodb-driver-core-3.6.3.jar:na]
    ... 3 common frames omitted

2018-03-25 17:47:15.372  INFO 14188 --- [localhost:27017] org.mongodb.driver.cluster               : Exception in monitor thread while connecting to server localhost:27017

com.mongodb.MongoSocketOpenException: Exception opening socket
    at com.mongodb.connection.netty.NettyStream$2.operationComplete(NettyStream.java:158) ~[mongodb-driver-core-3.6.3.jar:na]
    at com.mongodb.connection.netty.NettyStream$2.operationComplete(NettyStream.java:145) ~[mongodb-driver-core-3.6.3.jar:na]
    at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:511) ~[netty-common-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:504) ~[netty-common-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:483) ~[netty-common-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:424) ~[netty-common-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:121) ~[netty-common-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:327) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:343) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:633) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886) ~[netty-common-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.22.Final.jar:4.1.22.Final]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]
 Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/127.0.0.1:27017
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[na:1.8.0_144]
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[na:1.8.0_144]
    at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:325) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340) ~[netty-transport-4.1.22.Final.jar:4.1.22.Final]
    ... 7 common frames omitted
Caused by: java.net.ConnectException: Connection refused: no further information
    ... 11 common frames omitted

我的 pom.xml 如下:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.lorescianatico</groupId>
<artifactId>driftcoin</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>driftcoin</name>
<description>Driftcoin project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.0.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-webflux</artifactId>
    </dependency>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>de.flapdoodle.embed</groupId>
        <artifactId>de.flapdoodle.embed.mongo</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>io.projectreactor</groupId>
        <artifactId>reactor-test</artifactId>
        <scope>test</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.google.guava/guava -->
    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>24.0-jre</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>


</project>

我的应用程序属性只是一个空白文件。我的存储库类如下:

package com.lorescianatico.driftcoin.repository;

import com.lorescianatico.driftcoin.model.BlockChain;
import org.springframework.data.mongodb.repository.ReactiveMongoRepository;

public interface BlockChainRepository extends ReactiveMongoRepository<BlockChain, String> {
}

如您所见，我正在为 mongodb 使用响应式(Reactive)存储库。我已经尝试通过注释 react 存储库激活，但它没有改变异常。我是否遗漏了什么，比如配置或类似的东西？

提前致谢。

Answer 1

您的嵌入式 mongodb 设置为在您测试时使用:

<dependency>
    <groupId>de.flapdoodle.embed</groupId>
    <artifactId>de.flapdoodle.embed.mongo</artifactId>
    <scope>test</scope>
</dependency>

从那里删除测试范围，以便您可以在运行时使用它:

<dependency>
    <groupId>de.flapdoodle.embed</groupId>
    <artifactId>de.flapdoodle.embed.mongo</artifactId>
</dependency>