Question

我使用ProxyFactory和ClientExecutor在RESTEasy中开发了一个服务，如下所示：

PoolingClientConnectionManager connectionManager = new PoolingClientConnectionManager();
DefaultHttpClient httpClient = new DefaultHttpClient(connectionManager);
HttpParams params = httpClient.getParams();
HttpConnectionParams.setConnectionTimeout(params, 5000);
HttpConnectionParams.setSoTimeout(params, 5000);
ClientExecutor clientExecutor = new ApacheHttpClient4Executor(httpClient);
MyClass client = ProxyFactory.create(MyClass.class, "http://www.example.com", clientExecutor);

它总是很完美。在RESTEasy弃用了ClientExecutor和ProxyFactory后，他们为外部连接提供了一个新的ResteasyClient，但我不知道这个新的ResteasyClient是否是线程安全的。这是文档中的新示例代码：

ResteasyClient client = new ResteasyClientBuilder().build();
ResteasyWebTarget target = client.target("http://example.com/base/uri");

SimpleClient simple = target.proxy(SimpleClient.class);

UPDATE：我在ResteasyClient中使用了代码，我收到了很多错误：

javax.ws.rs.ProcessingException: Unable to invoke request

由

引起

java.lang.IllegalStateException: Invalid use of BasicClientConnManager: connection still allocated. Make sure to release the connection before allocating another one.

Answer 1

我们用这个：

    final ResteasyClient client = new ResteasyClientBuilder()
        .connectionPoolSize(10)
        .maxPooledPerRoute(5)
        .build();

调试后我发现（至少在我们的情况下）RESTEasy客户端默认使用ThreadSafeClientConnManager，所以我认为没有必要指定另一个，尽管根据JavaDoc它不赞成使用PoolingHttpClientConnectionManager（注意额外的Http）。但这已在RESTEasy客户端3.0.5中修复。最终：https://issues.jboss.org/browse/RESTEASY-948

这是HTTP连接管理器的丛林......

Answer 2

这对我有用。只需要找到设置Apache HTTP引擎的钩子。主要基于RestEasy 3.0.5.Final API

public static Object setupServiceProxy(@NotNull Class responseClass) {
    ResteasyProviderFactory factory = ResteasyProviderFactory.getInstance();
    ResteasyClientBuilder builder = new ResteasyClientBuilder().providerFactory(factory);
    ResteasyClient client = builder.httpEngine(setupHttpDefaults()).build();
    ResteasyWebTarget target = client.target(url);
    return target.proxy(responseClass);
}

public static ClientHttpEngine setupHttpDefaults() {
    PoolingClientConnectionManager connectionManager = new PoolingClientConnectionManager();
    DefaultHttpClient httpClient = new DefaultHttpClient(connectionManager);
    HttpParams params = httpClient.getParams();
    HttpConnectionParams.setConnectionTimeout(params, 30000);
    HttpConnectionParams.setSoTimeout(params, 30000);
    BasicHttpContext localContext = new BasicHttpContext();
    return new ApacheHttpClient4Engine(httpClient, localContext);
}

RESTEasy线程中的ProxyFactory替换是否安全？

2 个答案: