问题描述
我正在检查此项目https://github.com/balamaci/reactor-core-playground#simple-operators中的示例代码
@Test
public void delayElements() {
CountDownLatch latch = new CountDownLatch(1);
log.info("Starting");
Flux.range(0,5)
.doOnNext(val -> log.info("Emitted {}",val))
.delayElements(Duration.of(2,ChronoUnit.SECONDS))
.subscribe(
tick -> log.info("Tick {}",tick),(ex) -> log.info("Error emitted"),() -> {
log.info("Completed");
latch.countDown();
});
Helpers.wait(latch);
}
我希望能够看到类似Error emitted
的日志输出。
但是,如果我运行mvn test
,则根本看不到任何标准输出。
我试图在surefire插件中启用日志捕获,但它也没有实现任何目的
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-surefire-plugin</artifactId>
+ <configuration>
+ <redirectTestOutputToFile>true</redirectTestOutputToFile>
+ </configuration>
+ </plugin>
org.slf4j.simpleLogger.logFile=System.out
org.slf4j.simpleLogger.defaultLogLevel=info
org.slf4j.simpleLogger.showDateTime=true
org.slf4j.simpleLogger.dateTimeFormat=HH:mm:ss:SSS
org.slf4j.simpleLogger.showThreadName=true
org.slf4j.simpleLogger.showShortLogName=true
但是输出仍然是
$ mvn test
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< com.balamaci:reactor-playground >-------------------
[INFO] Building Reactor-Core Playground 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ reactor-playground ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources,i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory /Users/antkong/experiments/flux/reactor-core-playground/src/main/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ reactor-playground ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ reactor-playground ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources,i.e. build is platform dependent!
[INFO] copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ reactor-playground ---
[INFO] nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:3.0.0-M5:test (default-test) @ reactor-playground ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.657 s
[INFO] Finished at: 2020-08-21T18:27:58+10:00
[INFO] ------------------------------------------------------------------------
解决方法
似乎您在classpath上没有任何记录器实现。尝试添加以下内容:
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.2.3</version>
</dependency>
并创建resources/logback.xml
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<!-- encoders are assigned the type
ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="info" additivity="false">
<appender-ref ref="STDOUT"/>
</root>
</configuration>
,
这里的问题似乎是在类名中缺少Test
一词,因此根本没有运行它们。提供名称的mvn test -Dtest=Part02SimpleOperators
之类的命令也可以正常工作。