Resteasy客户端在方法抛出异常后保持分配连接

Question

我目前正在使用TJWSEmbeddedJaxrsServer来帮助我进行RESTful API测试（由Resteasy创建），并且运行良好。 但是，当任何被调用的方法引发异常时，都会发生问题：Reasteasy客户端“丢失”并仍然保持连接，不允许其他测试方法调用RESTful服务。 即使您实例化了可以解开异常并在嵌入式服务器中使用它的提供程序，也会发生这种情况。

有人可以帮我吗？

为了模拟问题，实际上很简单：

1. 在https://github.com/mp911de/rest-api-test中下载Mark Paluch提供的示例
2. 更改测试类，如下所示：

公共类InMemoryRestTest {

@Path("/myresource")
public static class MyResource {

    @POST
    @Consumes(MediaType.TEXT_PLAIN)
    @Produces(MediaType.APPLICATION_XML)
    public MyModel createMyModel(int number) throws Exception {
        // supose this is a Business exception
        throw new Exception("Test");
    }

}

public static MyResource sut = new MyResource();
public static InMemoryRestServer server;

@BeforeClass
public static void beforeClass() throws Exception {
    server = InMemoryRestServer.create(sut);
}

@AfterClass
public static void afterClass() throws Exception {
    server.close();
}

@Test
public void postSimpleBody() throws Exception {
    // This one throws the "Exception" exception and passes     
    Response response = server.newRequest("/myresource").request().buildPost(Entity.text("42")).invoke();
    assertEquals(Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), response.getStatus());
}

@Test
public void postAnother() throws Exception {
    // This one fails with "Invalid use of BasicClientConnManager: connection still allocated."
    Response response = server.newRequest("/myresource").request().buildPost(Entity.text("20")).invoke();
    assertEquals(Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), response.getStatus());
}

}

瞧！ 运行针对“ postAnother（）”的测试时，将发生以下错误：

javax.ws.rs.ProcessingException: Unable to invoke request
    at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:287)
    at org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(ClientInvocation.java:407)
    at biz.paluch.rest.test.InMemoryRestTest.postSimpleBody(InMemoryRestTest.java:51)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.IllegalStateException: Invalid use of BasicClientConnManager: connection still allocated.
Make sure to release the connection before allocating another one.
    at org.apache.http.impl.conn.BasicClientConnectionManager.getConnection(BasicClientConnectionManager.java:162)
    at org.apache.http.impl.conn.BasicClientConnectionManager$1.getConnection(BasicClientConnectionManager.java:139)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:456)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
    at org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke(ApacheHttpClient4Engine.java:283)
    ... 27 more

Answer 1

默认的ResteasyClientBuilder不使用连接池，这意味着一次只能有一个并行连接。 因此，您必须确保关闭响应（即response.close（）），以释放（仅）连接。

在此处查看响应实现： https : //github.com/resteasy/Resteasy/blob/master/resteasy-client/src/main/java/org/jboss/resteasy/client/jaxrs/internal/ClientResponse.java

public void close()
   {
      if (isClosed()) return;
      try {
         isClosed = true;
         releaseConnection(); // <= HERE!
      }
      catch (Exception e) {
         throw new ProcessingException(e);
      }
   }

因此，以下方法可以解决您的问题：

@Test
public void postBody() throws Exception {          
    Response response = null;
    try {
        response = server.newRequest("...").request().buildPost(Entity.text("...")).invoke();           
    } finally {
        response.close();
    }   
}

问候，

伯纳德。

Answer 2

您需要配置ResteasyClientBuilder以使用连接池。 通过以下方式修改InMemoryRestServer类的withDefaults（）方法

//this.resteasyClient = new ResteasyrestEasyClientBuilder().build();
ResteasyrestEasyClientBuilder restEasyClientBuilder = new ResteasyrestEasyClientBuilder();
restEasyClientBuilder = restEasyClientBuilder.connectionPoolSize(20);
this.resteasyClient = restEasyClientBuilder.build();

这样，您的两个测试用例都应无例外地运行（尽管两者似乎都抛出AssertionError）

Answer 3

在Java SE 7及更高版本中，更干净的方法是对资源使用try。 样本片段如下：

try(response = server.newRequest("...").request().buildPost(Entity.text("...")).invoke())
{ 
   /* response handling logic */ 
}