1，ServiceUnavailableRetryStrategy 新增自動重試機制

import java.io.IOException;
import java.nio.charset.Charset;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.ServiceUnavailableRetryStrategy;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.config.ConnectionConfig;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.HttpClientConnectionManager;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.ContentType;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultServiceUnavailableRetryStrategy;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.ssl.TrustStrategy;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Apache Httpclient 工具包裝類 <br>
 * required httpclient-4.3
 *
 * @author jiucai
 */
public class HttpClientUtil {

    public static final String CHARSET_UTF8 = "UTF-8";

    protected static Logger logger = LoggerFactory.getLogger(HttpClientUtil.class);

    // 使用ResponseHandler介面處理響應，HttpClient使用ResponseHandler會自動管理連線的釋放，解決了對連線的釋放管理
    private static ResponseHandler<String> responseHandler = new ResponseHandler<String>() {
        // 自定義響應處理
        @Override
        public String handleResponse(HttpResponse response)
                throws ClientProtocolException, IOException {

            int code = response.getStatusLine().getStatusCode();

            // 如果不是200，則返回狀態碼
            // if (HttpStatus.SC_OK <= code && code < 500) {

            if (code < 200 || code >= 500) {
                return String.valueOf(code);
            }

            HttpEntity entity = response.getEntity();
            if (entity != null) {
                Charset charset = ContentType.getOrDefault(entity).getCharset();
                if (null != charset) {
                    return new String(EntityUtils.toByteArray(entity), charset);
                } else {
                    return new String(EntityUtils.toByteArray(entity));
                }

            } else {
                return null;
            }
        }
    };

    /**
     * 釋放HttpClient連線
     *
     * @param hrb
     *            請求物件
     * @param httpclient
     *            物件
     */
    public static void abortConnection(final HttpUriRequest hrb,
            final CloseableHttpClient httpclient) {
        if (hrb != null) {
            hrb.abort();
        }
        if (httpclient != null) {
            // httpclient.getConnectionManager().shutdown();
            try {
                // logger.debug("closing httpclient ...");
                httpclient.close();
            } catch (IOException e) {
                logger.error("failed to close httpclient", e);
            }

        }
    }

    /**
     * Get方式提交,URL中包含查詢引數
     *
     * @param url
     *            提交地址
     * @return 響應訊息
     */
    public static String get(String url) {
        return get(url, null, CHARSET_UTF8);
    }

    /**
     * Get方式提交,URL中不包含查詢引數
     *
     * @param url
     *            提交地址
     * @param params
     *            查詢引數集, 鍵/值對
     * @return 響應訊息
     */
    public static String get(String url, Map<String, String> params) {
        return get(url, params, CHARSET_UTF8);
    }

    /**
     * Get方式提交,URL中不包含查詢引數
     *
     * @param url
     *            提交地址
     * @param params
     *            查詢引數集, 鍵/值對
     * @param charset
     *            引數提交編碼集
     * @return 響應訊息
     */
    public static String get(String url, Map<String, String> params, String charset) {

        return get(url, params, charset, getHttpClient(charset));
    }

    public static String get(String url, Map<String, String> params, String charset,
            CloseableHttpClient client) {
        if (url == null || StringUtils.isEmpty(url)) {
            return null;
        }
        List<NameValuePair> qparams = getParamsList(params);
        if (qparams != null && qparams.size() > 0) {
            charset = (charset == null ? CHARSET_UTF8 : charset);
            String formatParams = URLEncodedUtils.format(qparams, charset);
            url = (url.indexOf("?")) < 0 ? (url + "?" + formatParams)
                    : (url.substring(0, url.indexOf("?") + 1) + formatParams);
        }
        HttpGet hg = new HttpGet(url);
        // 傳送請求，得到響應
        String responseStr = null;
        try {
            responseStr = client.execute(hg, responseHandler);
        } catch (ClientProtocolException e) {
            throw new RuntimeException("客戶端連線協議錯誤", e);
        } catch (IOException e) {
            throw new RuntimeException("IO操作異常", e);
        } finally {
            abortConnection(hg, client);
        }
        return responseStr;
    }

    public static HttpClientConnectionManager getConnectionManager() {

        // ConnectionSocketFactory plainsf = null;
        LayeredConnectionSocketFactory sslsf = null;

        RegistryBuilder<ConnectionSocketFactory> registryBuilder = RegistryBuilder.create();

        PlainConnectionSocketFactory plainsf = PlainConnectionSocketFactory.getSocketFactory();
        registryBuilder.register("http", plainsf);

        try {

            // Trust own CA and all self-signed certs
            SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(new TrustStrategy() {
                @Override
                public boolean isTrusted(X509Certificate[] chain, String authType)
                        throws CertificateException {
                    return true;
                }
            }).build();

            HostnameVerifier allowAllHostnameVerifier = NoopHostnameVerifier.INSTANCE;
            sslsf = new SSLConnectionSocketFactory(sslcontext, allowAllHostnameVerifier);

            registryBuilder.register("https", sslsf);

        } catch (Throwable e) {

            logger.error("https ssl init failed", e);
        }

        Registry<ConnectionSocketFactory> r = registryBuilder.build();

        PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(r);
        connManager.setMaxTotal(100);// 連線池最大併發連線數
        connManager.setDefaultMaxPerRoute(100);// 單路由最大併發數
        return connManager;

    }

    /**
     * 獲取HttpClient例項
     *
     * @param charset
     *            引數編碼集, 可空
     * @return HttpClient 物件
     */
    public static CloseableHttpClient getHttpClient(final String charset) {
        return getHttpClientBuilder(charset, null, 0).build();

    }

    public static HttpClientBuilder getHttpClientBuilder(final String charset, String proxyIp,
            int proxyPort) {

        HttpClientBuilder builder = HttpClients.custom();

        Charset chartset = charset == null ? Charset.forName(CHARSET_UTF8)
                : Charset.forName(charset);
        ConnectionConfig.Builder connBuilder = ConnectionConfig.custom().setCharset(chartset);

        RequestConfig.Builder reqBuilder = RequestConfig.custom();
        reqBuilder.setExpectContinueEnabled(false);
        reqBuilder.setSocketTimeout(10 * 60 * 1000);
        reqBuilder.setConnectTimeout(10 * 60 * 1000);
        reqBuilder.setMaxRedirects(10);

        if (StringUtils.isNotBlank(proxyIp) && proxyPort > 0) {
            logger.info("using proxy {}:{} to request ", proxyIp, String.valueOf(proxyPort));
            HttpHost proxy = new HttpHost(proxyIp, proxyPort);
            reqBuilder.setProxy(proxy);
        }

        ServiceUnavailableRetryStrategy serviceUnavailableRetryStrategy = new DefaultServiceUnavailableRetryStrategy(
                3, 3000);
        builder.setServiceUnavailableRetryStrategy(serviceUnavailableRetryStrategy);
        // 模擬瀏覽器，解決一些伺服器程式只允許瀏覽器訪問的問題
        builder.setUserAgent(
                "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0");

        builder.setDefaultRequestConfig(reqBuilder.build());
        builder.setDefaultConnectionConfig(connBuilder.build());
        builder.setConnectionManager(getConnectionManager());

        // HostnameVerifier allowAllHostnameVerifier =
        // NoopHostnameVerifier.INSTANCE;
        // builder.setSSLHostnameVerifier(allowAllHostnameVerifier);

        return builder;

    }

    /**
     * 將傳入的鍵/值對引數轉換為NameValuePair引數集
     *
     * @param paramsMap
     *            引數集, 鍵/值對
     * @return NameValuePair引數集
     */
    public static List<NameValuePair> getParamsList(Map<String, String> paramsMap) {
        if (paramsMap == null || paramsMap.size() == 0) {
            return null;
        }
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        for (Map.Entry<String, String> map : paramsMap.entrySet()) {
            params.add(new BasicNameValuePair(map.getKey(), map.getValue()));
        }
        return params;
    }

    /**
     * Post方式提交,URL中不包含提交引數
     *
     * @param url
     *            提交地址
     * @param params
     *            提交引數集, 鍵/值對
     * @return 響應訊息
     */
    public static String post(String url, Map<String, String> params) {
        return post(url, params, HttpClientUtil.CHARSET_UTF8);
    }

    /**
     * Post方式提交,URL中不包含提交引數
     *
     * @param url
     *            提交地址
     * @param params
     *            提交引數集, 鍵/值對
     * @param charset
     *            引數提交編碼集
     * @return 響應訊息
     */
    public static String post(String url, Map<String, String> params, String charset) {
        return post(url, params, charset, getHttpClient(charset));
    }

    public static String post(String url, Map<String, String> params, String charset,
            boolean isSecure) {

        return post(url, params, charset);

    }

    public static String post(String url, Map<String, String> params, String charset,
            CloseableHttpClient client) {
        if (url == null || StringUtils.isEmpty(url)) {
            return null;
        }
        UrlEncodedFormEntity formEntity = null;
        try {
            if (charset == null || StringUtils.isEmpty(charset)) {
                if (null != params && params.size() > 0) {
                    formEntity = new UrlEncodedFormEntity(getParamsList(params));
                }
            } else {
                if (null != params && params.size() > 0) {
                    formEntity = new UrlEncodedFormEntity(getParamsList(params), charset);
                }
            }
        } catch (Exception e) {
            throw new RuntimeException("不支援的編碼集", e);
        }
        HttpPost hp = new HttpPost(url);

        if (null != formEntity) {
            hp.setEntity(formEntity);
        }

        // 傳送請求，得到響應
        String responseStr = null;
        try {
            responseStr = client.execute(hp, responseHandler);
        } catch (ClientProtocolException e) {
            throw new RuntimeException("客戶端連線協議錯誤", e);
        } catch (IOException e) {
            throw new RuntimeException("IO操作異常", e);
        } finally {
            abortConnection(hp, client);
        }
        return responseStr;
    }

}
 

guaua-retry自動義重試機制

  private Map<String, String> retryRequest(String httpsUrl, Map<String, String> httpsParam) {
        Map<String, String> reponseMap = Maps.newHashMap();
        try {
            Retryer<Map<String, String>> retryer = RetryerBuilder.<Map<String, String>>newBuilder().retryIfResult(
                    new Predicate<Map<String, String>>() {
                        @Override
                        public boolean apply(@Nullable Map<String, String> soMap) {
                            String returnCode = (String) soMap.get("return_code");
                            // 富數token異常，讓快取中的token失效，重新獲取
                            if (Constant.FUSHU_TOKEN_EMPTY.equals(returnCode)
                                    || Constant.FUSHU_TOKEN_EXPIRE.equals(returnCode)
                                    || Constant.FUSHU_TOKEN_INVALID.equals(returnCode)) {
                                FsDirectToken.getInstance().getTokenCache().put(Constant.FIELD_FS_TOKEN, "");
                                FsDirectToken.getInstance().getTokenCache().put(Constant.FIELD_TOKEN_EXPIRY, "");
                                return true;
                            }
                            // 返回狀態碼不為0重試
                            if (!"0".equals(returnCode)) {
                                return true;
                            }
                            return false;
                        }
                    }
            ).retryIfExceptionOfType(IOException.class)
                    .retryIfRuntimeException()
                    .withWaitStrategy(WaitStrategies.fixedWait(10, TimeUnit.SECONDS))
                    .withStopStrategy(StopStrategies.stopAfterAttempt(5)).build();
            reponseMap = retryer.call(new Callable<Map<String, String>>() {
                @Override
                public Map<String, String> call() throws Exception {
                    return retryRequestCall(httpsUrl, httpsParam);
                }
            });
        } catch (Exception e) {
            logger.error("重試請求異常:{}", e.getMessage());
            try {
                reponseMap = retryRequestCall(httpsUrl, httpsParam);
            } catch (Exception ex) {
                logger.error("重試補發請求異常:{}", ex);
            }
        }
        return reponseMap;
    }

    /**
     * 重發call請求
     *
     * @param httpsUrl
     * @param httpsParam
     * @return
     */
    private Map<String, String> retryRequestCall(String httpsUrl, Map<String, String> httpsParam) {
        Map<String, String> innerMap = Maps.newHashMap();
        String token = getFsToken();
        httpsParam.put("token", token);
        logger.info("富數三方請求引數:{}", JSON.toJSONString(httpsParam));
        String message = HttpClientUtils.post(httpsUrl, httpsParam);
        logger.info("富數三方返回結果:{}", JSON.toJSONString(message));
        JSONObject jsonObject = JSONObject.parseObject(message);
        innerMap.put("return_code", jsonObject.getString("return_code"));
        innerMap.put("data", message);
        return innerMap;
    }