小编gst*_*low的帖子

我想调试.class文件.例如来自JDK的一些.我下载了源代码并附上了它们.

public File[] listFiles(FilenameFilter paramFilenameFilter)
{
   String[] arrayOfString = list(); // now we here
   if (arrayOfString == null) return null;
   ....
}

然后我键入F6并移动到下一行.在那之后,我试着看看它的价值,arrayOfString但我看到以下内容:

表达视图:

情况是正常的吗？有没有办法调试？

更新1:

更新2:

更新3:

servlet 3.0异步功能之间的区别是什么:

doGet(request,response) {
Thread t = new Thread(new Runnable()
     void run(){
        // heavy processing
        response.write(result)
     }
}
t.start();

在servlet 3.0中,如果我浪费一个线程来进行繁重的处理 - 我在容器中再赚一个线程,但是我在繁重的处理中浪费它... :(

有人可以帮忙吗？

我有集成测试(加载上下文)和单元测试一起运行.我的代码使用spring进行编译时编织.

我的问题是我声明的建议也在我的一些单元测试中运行.这会杀死单元测试的概念,这就是我想禁用它们的原因.

有什么我可以放在切入点声明,我可以调用的一些方法,一些弹簧配置,或maven命令,禁用这些建议像所有*UnitTest.java？

谢谢您的帮助.

例:

我有以下单元测试:

@RunWith(MockitoJUnitRunner.class)
public class CompanyServiceImplTest {
    @Test
    public void createCampaignTest() throws Exception {
        when(companyDaoMock.saveCompany(any(Campaign.class))).thenReturn(77L);

        Long campaignId = companyService.createCampaign(campaignMock);

        assertEquals(Long.valueOf(77L), Long.valueOf(campaignId));
    }
}

以及服务方法:

@Override
@Transactional
@EventJournal(type = EventType.CAMPAIGN_CREATE, owner = EventOwner.TERMINAL_USER)
public Long createCampaign(Campaign campaign) {
    return companyDao.saveCompany(campaign);
}

方面:

@Aspect
public class EventJournalAspect {

    @Autowired
    private EventJournalService eventJournalService;

    @Pointcut(value="execution(public * *(..))")
    public void anyPublicMethod() {}

    @Pointcut("within(com.terminal.service..*)")
    private void inService() {}

    @AfterReturning(pointcut = "anyPublicMethod() && inService() && @annotation(eventJournal) && args(entity,..)", returning = "id")
    public void …

我知道如果我有元素,我想得到List/ Set/ Map这个元素我可以调用:

Collections.singleton()/ Collections.singletonList()/Collections.singletonMap()

在这种情况下,我得到不可变的集合(我不能添加/删除元素到集合).

是否有模拟获得可变集合？

我正在尝试将上传图片的功能添加到我的spring mvc应用程序中.

jsp部分:

...
<form method="POST"  action="uploadImage" enctype="multipart/form-data">
                <div class="load-line">
                    <input type="file" class="file"/>
                    <input type="submit" value="Upload">
...

组态:

... 
<bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver" />
...

控制器:

 @RequestMapping(value="/member/createCompany/uploadImage", method=RequestMethod.POST)
    public @ResponseBody String handleFileUpload(
            @RequestParam("file") MultipartFile file){
        String name = "image_name";
        if (!file.isEmpty()) {
            try {
                byte[] bytes = file.getBytes();
                BufferedOutputStream stream =
                        new BufferedOutputStream(new FileOutputStream(new File(name + "-uploaded")));
                stream.write(bytes);
                stream.close();
                return "You successfully uploaded " + name + " into " + name + "-uploaded !";
            } catch (Exception e) {
                return …

我写过以下测试:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:META-INF/dataContext.xml"},classes = Configiuration.class)
@ActiveProfiles("test")
public class CityDaoImplTest {
....
}

我需要在调用时使用xml文件和java类bur中的配置

mvn test我在控制台中看到以下内容:

Tests in error: 
  initializationError(***.CityDaoImplTest): Cannot process locations AND classes for context configuration [ContextConfigurationAttributes@5bb21b69 declaringClass = '***.CityDaoImplTest', classes = '{***.Configiuration}', locations = '{classpath:META-INF/dataContext.xml}', inheritLocations = true, initializers = '{}', inheritInitializers = true, name = [null], contextLoaderClass = 'org.springframework.test.context.ContextLoader']; configure one or the other, but not both.

如何在不重写配置的情况下修复它？

我有代码实现任意键的"锁定处理程序".给定a key,它确保一次只有一个线程可以process(或等于)密钥(这意味着调用该externalSystem.process(key)呼叫).

到目前为止,我有这样的代码:

public class MyHandler {
    private final SomeWorkExecutor someWorkExecutor;
    private final ConcurrentHashMap<Key, Lock> lockMap = new ConcurrentHashMap<>();

    public void handle(Key key) {
        // This can lead to OOM as it creates locks without removing them
        Lock keyLock = lockMap.computeIfAbsent( 
            key, (k) -> new ReentrantLock()
        );
        keyLock.lock();
        try {
            someWorkExecutor.process(key);
        } finally {
            keyLock.unlock();
        }
    }
}

我明白这段代码可以导致OutOfMemoryError因为没有一张清晰的地图.

我想如何制作积累有限数量元素的地图.当超过限制时,我们应该用new替换最旧的访问元素(此代码应与作为监视器的最旧元素同步).但是我不知道怎么回调会说我超出限制.

请分享你的想法.

PS

我重读了这个任务,现在我发现我有限制,handle不能调用超过8个线程的方法.我不知道它对我有什么帮助,但我刚提到它.

PS2

通过@Boris,Spider被认为是一个简单明了的解决方案:

} finally {
      lockMap.remove(key);
      keyLock.unlock();
} …

我有以下JPQL请求;

@Query(value = "select req_t " +
        "from TransactionRelation tr " +
        "inner join tr.requestTransaction req_t " +
        "inner join req_t.transactionStateHistory req_t_h " +
        "inner join tr.responseTransaction resp_t " +
        "inner join resp_t.transactionStateHistory resp_t_h " +
        "where req_t.id >?1 " +
        "and req_t.receiver.id=?2 and req_t.requestType in ?3" +
        "and NOT EXISTS (select t from resp_t_h t where t.transactionState = 'REPLIED' )" +
        "and EXISTS (select tt from req_t_h tt where tt.transactionState = 'WAITING_PROVIDER' )"
)
List<Transaction> queryTrabsactions(Long transactionId, Long providerId, …

我读过以下主题: 使用Spring MVC禁用Swagger

我写道:

@Bean
public Docket api() {
    return new Docket(DocumentationType.SWAGGER_2)
            .select()
            .apis(RequestHandlerSelectors.basePackage("com.project.name.controller"))
            .paths(PathSelectors.ant("/api/**"))
            .build()
            .apiInfo(apiInfo())
            .enable(false);
}

但如果我试图访问swagger ui:localhost:8080/swagger-ui.html
我明白了

看起来不准确.我可以完全禁用此网址吗？例如404或类似的东西.

我有这门课:

    package controllers;

    import static org.junit.Assert.*;
    import static org.mockito.Mockito.mock;
    import static org.mockito.Mockito.times;
    import static org.mockito.Mockito.verify;
    import static org.mockito.Mockito.when;

    import java.util.HashSet;

    import org.junit.Before;
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.mockito.InjectMocks;
    import org.mockito.Mock;
    import org.mockito.MockitoAnnotations;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.test.context.ContextConfiguration;


    import org.springframework.ui.Model;
    import org.springframework.web.context.WebApplicationContext;

    import com.epam.hhsystem.model.candidate.Candidate;
    import com.epam.hhsystem.services.CandidateService;
    import com.epam.hhsystem.web.controllers.CandidateMenuController;
    import org.springframework.test.context.web.WebAppConfiguration;
    import org.springframework.test.context.junit4.*;
    import org.springframework.test.web.servlet.MockMvc;
    import org.springframework.test.web.servlet.ResultActions;
    import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
    import org.springframework.test.web.servlet.setup.MockMvcBuilders;


    import org.springframework.test.web.servlet.request.*;

    import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
    import static org.hamcrest.Matchers.*;
    import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
    import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;


    @ContextConfiguration(locations = { "classpath:/test/BeanConfig.xml" })
    @RunWith(SpringJUnit4ClassRunner.class)
    @WebAppConfiguration
    public …