小明写了一个Executor
,希望实现并发执行任务并将得到的结果串行执行,但是却没有达到目的。请帮助他找到问题并修复之。
这个问题来源于一个真实项目中的问题:pinterest/ktlint#277
在提交Pull Request之前,你应当在本地确保所有代码已经编译通过,并且通过了测试(mvn clean verify
)
注意!我们只允许你修改以下文件,对其他文件的修改会被拒绝:
完成题目有困难?不妨来看看写代码啦的相应课程吧!
回到写代码啦的题目,继续挑战!
Java advanced practice: process hangs
小明写了一个Executor
,希望实现并发执行任务并将得到的结果串行执行,但是却没有达到目的。请帮助他找到问题并修复之。
这个问题来源于一个真实项目中的问题:pinterest/ktlint#277
在提交Pull Request之前,你应当在本地确保所有代码已经编译通过,并且通过了测试(mvn clean verify
)
注意!我们只允许你修改以下文件,对其他文件的修改会被拒绝:
完成题目有困难?不妨来看看写代码啦的相应课程吧!
回到写代码啦的题目,继续挑战!
问题描述:
在IDEA中手动Run/Debug ExeuctorTest显示测试通过,但是使用mvn test命令时报出异常
org.apache.maven.plugin.MojoFailureException: You have 2 Checkstyle violations.
复现例子:
由于捕获所有消费者消费task时产生的所有异常,代码改动如下:
HashMap<Integer, Exception> exceptionInConsumerThread = new HashMap<>();
try {
consumer.accept(future.get());
} catch (Exception e) {
exceptionInConsumerThread.put(taskNum, e);
}
Exception exception = null;
for (Integer e : exceptionInConsumerThread.keySet()) {
System.out.println("task" + e + "出现如下异常:");
exceptionInConsumerThread.get(e).printStackTrace();
System.out.println();
exception = exceptionInConsumerThread.get(e);
}
if (exception != null) {
throw exception;
}
taskNum为出现异常的task的索引
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