Examples with ServiceUnavailableRetryStrategy org.apache.http.client.ServiceUnavailableRetryStrategy used on opensource projects

Example 1 with ServiceUnavailableRetryStrategy

use of org.apache.http.client.ServiceUnavailableRetryStrategy in project hive by apache.

the class HiveConnection method getHttpClient.

private CloseableHttpClient getHttpClient(Boolean useSsl) throws SQLException {
    boolean isCookieEnabled = sessConfMap.get(JdbcConnectionParams.COOKIE_AUTH) == null || (!JdbcConnectionParams.COOKIE_AUTH_FALSE.equalsIgnoreCase(sessConfMap.get(JdbcConnectionParams.COOKIE_AUTH)));
    String cookieName = sessConfMap.get(JdbcConnectionParams.COOKIE_NAME) == null ? JdbcConnectionParams.DEFAULT_COOKIE_NAMES_HS2 : sessConfMap.get(JdbcConnectionParams.COOKIE_NAME);
    CookieStore cookieStore = isCookieEnabled ? new BasicCookieStore() : null;
    HttpClientBuilder httpClientBuilder;
    // Request interceptor for any request pre-processing logic
    HttpRequestInterceptor requestInterceptor;
    Map<String, String> additionalHttpHeaders = new HashMap<String, String>();
    // Retrieve the additional HttpHeaders
    for (Map.Entry<String, String> entry : sessConfMap.entrySet()) {
        String key = entry.getKey();
        if (key.startsWith(JdbcConnectionParams.HTTP_HEADER_PREFIX)) {
            additionalHttpHeaders.put(key.substring(JdbcConnectionParams.HTTP_HEADER_PREFIX.length()), entry.getValue());
        }
    }
    // Configure http client for kerberos/password based authentication
    if (isKerberosAuthMode()) {
        /**
       * Add an interceptor which sets the appropriate header in the request.
       * It does the kerberos authentication and get the final service ticket,
       * for sending to the server before every request.
       * In https mode, the entire information is encrypted
       */
        requestInterceptor = new HttpKerberosRequestInterceptor(sessConfMap.get(JdbcConnectionParams.AUTH_PRINCIPAL), host, getServerHttpUrl(useSsl), assumeSubject, cookieStore, cookieName, useSsl, additionalHttpHeaders);
    } else {
        // Check for delegation token, if present add it in the header
        String tokenStr = getClientDelegationToken(sessConfMap);
        if (tokenStr != null) {
            requestInterceptor = new HttpTokenAuthInterceptor(tokenStr, cookieStore, cookieName, useSsl, additionalHttpHeaders);
        } else {
            /**
       * Add an interceptor to pass username/password in the header.
       * In https mode, the entire information is encrypted
       */
            requestInterceptor = new HttpBasicAuthInterceptor(getUserName(), getPassword(), cookieStore, cookieName, useSsl, additionalHttpHeaders);
        }
    }
    // Configure http client for cookie based authentication
    if (isCookieEnabled) {
        // Create a http client with a retry mechanism when the server returns a status code of 401.
        httpClientBuilder = HttpClients.custom().setServiceUnavailableRetryStrategy(new ServiceUnavailableRetryStrategy() {

            @Override
            public boolean retryRequest(final HttpResponse response, final int executionCount, final HttpContext context) {
                int statusCode = response.getStatusLine().getStatusCode();
                boolean ret = statusCode == 401 && executionCount <= 1;
                // interceptor
                if (ret) {
                    context.setAttribute(Utils.HIVE_SERVER2_RETRY_KEY, Utils.HIVE_SERVER2_RETRY_TRUE);
                }
                return ret;
            }

            @Override
            public long getRetryInterval() {
                // Immediate retry
                return 0;
            }
        });
    } else {
        httpClientBuilder = HttpClientBuilder.create();
    }
    // Add the request interceptor to the client builder
    httpClientBuilder.addInterceptorFirst(requestInterceptor);
    // Add an interceptor to add in an XSRF header
    httpClientBuilder.addInterceptorLast(new XsrfHttpRequestInterceptor());
    // Configure http client for SSL
    if (useSsl) {
        String useTwoWaySSL = sessConfMap.get(JdbcConnectionParams.USE_TWO_WAY_SSL);
        String sslTrustStorePath = sessConfMap.get(JdbcConnectionParams.SSL_TRUST_STORE);
        String sslTrustStorePassword = sessConfMap.get(JdbcConnectionParams.SSL_TRUST_STORE_PASSWORD);
        KeyStore sslTrustStore;
        SSLConnectionSocketFactory socketFactory;
        SSLContext sslContext;
        /**
       * The code within the try block throws: SSLInitializationException, KeyStoreException,
       * IOException, NoSuchAlgorithmException, CertificateException, KeyManagementException &
       * UnrecoverableKeyException. We don't want the client to retry on any of these,
       * hence we catch all and throw a SQLException.
       */
        try {
            if (useTwoWaySSL != null && useTwoWaySSL.equalsIgnoreCase(JdbcConnectionParams.TRUE)) {
                socketFactory = getTwoWaySSLSocketFactory();
            } else if (sslTrustStorePath == null || sslTrustStorePath.isEmpty()) {
                // Create a default socket factory based on standard JSSE trust material
                socketFactory = SSLConnectionSocketFactory.getSocketFactory();
            } else {
                // Pick trust store config from the given path
                sslTrustStore = KeyStore.getInstance(JdbcConnectionParams.SSL_TRUST_STORE_TYPE);
                try (FileInputStream fis = new FileInputStream(sslTrustStorePath)) {
                    sslTrustStore.load(fis, sslTrustStorePassword.toCharArray());
                }
                sslContext = SSLContexts.custom().loadTrustMaterial(sslTrustStore, null).build();
                socketFactory = new SSLConnectionSocketFactory(sslContext, new DefaultHostnameVerifier(null));
            }
            final Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create().register("https", socketFactory).build();
            httpClientBuilder.setConnectionManager(new BasicHttpClientConnectionManager(registry));
        } catch (Exception e) {
            String msg = "Could not create an https connection to " + jdbcUriString + ". " + e.getMessage();
            throw new SQLException(msg, " 08S01", e);
        }
    }
    return httpClientBuilder.build();
}