Solr基本身份验证，无需为每个请求设置凭据

Question

目前，我正在使用Solrj库在SOLR云上使用SOLR基本身份验证功能。根据文档和我发现的唯一方法，代码看起来像这样 -

SolrRequest<QueryResponse> req = new QueryRequest(solrQuery); 
req.setBasicAuthCredentials("admin", "foobar");
QueryResponse rsp = req.process(solrClient, liveStreamCollection);
documentList = rsp.getResults();

我想知道是否有办法避免每个请求setBasicAuthCredentials，并且solrClient每个会话只执行一次？

修改

上述方法适用于SolrClient和SolrCloudClient（核心和集合）。为了避免为每个请求传递基本凭据，我尝试构建并使用这样的HttpClient。

AuthScope authScope = new AuthScope("192.168.x.x", 8983);
UsernamePasswordCredentials creds = new UsernamePasswordCredentials("admin", "foobar");
CredentialsProvider credsProvider = new BasicCredentialsProvider();
credsProvider.setCredentials(authScope, creds);
HttpClientBuilder builder = HttpClientBuilder.create();
builder.addInterceptorFirst(new PreemptiveAuthInterceptor());
builder.setDefaultCredentialsProvider(credsProvider);
CloseableHttpClient httpClient = builder.build();
solrClient = new HttpSolrClient("http://192.168.x.x:8983/solr/", httpClient);

PreemptiveAuthInterceptor类：

static class PreemptiveAuthInterceptor implements HttpRequestInterceptor {

    @Override
    public void process(final HttpRequest request, final HttpContext context) throws HttpException, IOException {
        AuthState authState = (AuthState) context.getAttribute(HttpClientContext.TARGET_AUTH_STATE);
        // If no auth scheme available yet, try to initialize it preemptively
        if (authState.getAuthScheme() == null) {
            CredentialsProvider credsProvider = (CredentialsProvider) 
                        context.getAttribute(HttpClientContext.CREDS_PROVIDER);
            HttpHost targetHost = (HttpHost) context.getAttribute(HttpCoreContext.HTTP_TARGET_HOST);
            AuthScope authScope = new AuthScope(targetHost.getHostName(), targetHost.getPort());
            Credentials creds = credsProvider.getCredentials(authScope);
            if(creds == null){

            }
            authState.update(new BasicScheme(), creds);
        }

    }
}

这适用于单机Solr核心，但我不知道如何在Solr云中使用它（通过Zookeeper主机等）。有什么想法吗？

提前致谢！