Java asyncHttpClient 为每个连接创建新线程

Question

我正在用java做库，库用于调用外部服务API。为此，我使用 AsyncHttpClient

部分代码:

 public CompletableFuture<Optional<TokensResponse>> clientCredentialsGrant(String clientId, String clientSecret, String deviceId, Optional<String> scope) {
        AsyncHttpClient asyncHttpClient = asyncHttpClient();
        BoundRequestBuilder requestBuilder = asyncHttpClient
                .preparePost(host + "/oauth2/token")
                .addFormParam("grant_type", "client_credentials")
                .addFormParam("device_id", deviceId)
                .addFormParam("client_id", clientId)
                .addFormParam("client_secret", clientSecret);

        if (scope.isPresent()) {
            requestBuilder.addFormParam("scope", scope.get());
        }

        return runRequestWithTokenResponse(requestBuilder, asyncHttpClient);
    }

如果某个项目使用这个库，我将运行例如 1000 个请求，即使它们会完成，我最终会挂起很多线程。达到请求后我正在做的事情:

asyncHttpClient.close();

我可以定义一些要使用的线程池吗？

Typically, AHC will usually underperform if you create a new client for each request, as it will create new threads and connection pools for each

这就是我实际上正在做的事情..

Answer 1

当你初始化AsyncHttpClient对象时

你可以这样做，可以通过 AsyncHttpClientConfig 配置连接池行为:

AsyncHttpClient http = asyncHttpClient(config()
    .setMaxConnections(500)
    .setMaxConnectionsPerHost(200)
    .setPooledConnectionIdleTimeout(100)
    .setConnectionTtl(500)
);