Question

我正在使用此测试代码调用REST服务：

public class TestRESTServices {
    private static final String BASE_URL = "http://localhost/ma.ge.persistence-1.0/rest/reference";
    private static URI uri = UriBuilder.fromUri(BASE_URL).port(8080).build();
    private static Client client = ClientBuilder.newClient();

    @Test
    public void createAndDeleteAReference() {

        Reference r = ReferenceFactory.createReference("Maz",
                "dummy", 1.7);
        Response response = client.target(uri).request().post(Entity.entity(r, MediaType.APPLICATION_JSON));
        assertEquals(Response.Status.CREATED, response.getStatusInfo());

        URI referenceURI = response.getLocation();

        // Get the posted reference
        response = client.target(referenceURI).request().get();

        Reference retreivedRef = response.readEntity(Reference.class);
        assertEquals(Response.Status.OK, response.getStatusInfo());
        assertEquals(retreivedRef.getName(), r.getName());

    }

但是我收到以下错误：

javax.ws.rs.ProcessingException：无法调用请求在org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke（ApacheHttpClient4Engine.java:287）在org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke（ClientInvocation.java:407）在org.jboss.resteasy.client.jaxrs.internal.ClientInvocationBuilder.get（ClientInvocationBuilder.java:159） at ma.gesto.persistence.TestRESTServices.createAndDeleteAReference（TestRESTServices.java:34） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） at java.lang.reflect.Method.invoke（Method.java:606）在org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod.java:47）在org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）在org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:44）在org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17）在org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:271）在org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:70）在org.junit.runners.BlockJUnit4ClassRunner.runChild（BlockJUnit4ClassRunner.java:50）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:238）在org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:63）在org.junit.runners.ParentRunner.runChildren（ParentRunner.java:236）在org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:53）在org.junit.runners.ParentRunner $ 2.evaluate（ParentRunner.java:229）在org.junit.runners.ParentRunner.run（ParentRunner.java:309）在org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run（JUnit4TestReference.java:50）在org.eclipse.jdt.internal.junit.runner.TestExecution.run（TestExecution.java:38）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:459）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests（RemoteTestRunner.java:675）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run（RemoteTestRunner.java:382）在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main（RemoteTestRunner.java:192）引起：java.lang.IllegalStateException：无效使用BasicClientConnManager：仍然分配连接。确保在分配另一个连接之前释放连接。 at org.apache.http.impl.conn.BasicClientConnectionManager.getConnection（BasicClientConnectionManager.java:162） at org.apache.http.impl.conn.BasicClientConnectionManager $ 1.getConnection（BasicClientConnectionManager.java:139）在org.apache.http.impl.client.DefaultRequestDirector.execute（DefaultRequestDirector.java:456） at org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:906）在org.apache.http.impl.client.AbstractHttpClient.execute（AbstractHttpClient.java:805）在org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine.invoke（ApacheHttpClient4Engine.java:283） ......还有26个

Answer 1

Client接口表示外部资源。因此，在静态变量中创建和存储一个是一个严重的错误。这是错的：

private static Client client = ClientBuilder.newClient();

这适用于单元测试：

private Client client;

@Before
public void setUp() {
    this.client = ClientBuilder.newClient();
}

@After
public void tearDown() {
    this.client.close();
}

在普通代码中，您希望在Client或try-with-resources中包含try..finally用法：

Client client = ClientBuilder.newClient();
try {
    // use the client to make requests
} finally {
    client.close();
}

理想情况下，有一种方法可以管理Client个实例池以供重用。

Answer 2

您还需要关闭响应以释放连接。请参阅此处的说明： Resteasy Client keeping connection allocated after a method throws an Exception

REST Java客户端API：在分配另一个之前释放连接

2 个答案: