List of usage examples for org.apache.http.impl.client HttpClientBuilder setConnectionManager
public final HttpClientBuilder setConnectionManager(final HttpClientConnectionManager connManager)
From source file:org.apache.nifi.processors.standard.PostHTTP.java
@Override public void onTrigger(final ProcessContext context, final ProcessSession session) { final boolean sendAsFlowFile = context.getProperty(SEND_AS_FLOWFILE).asBoolean(); final int compressionLevel = context.getProperty(COMPRESSION_LEVEL).asInteger(); final String userAgent = context.getProperty(USER_AGENT).getValue(); final RequestConfig.Builder requestConfigBuilder = RequestConfig.custom(); requestConfigBuilder.setConnectionRequestTimeout( context.getProperty(DATA_TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS).intValue()); requestConfigBuilder.setConnectTimeout( context.getProperty(CONNECTION_TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS).intValue()); requestConfigBuilder.setRedirectsEnabled(false); requestConfigBuilder/*from w w w . j av a 2s .c o m*/ .setSocketTimeout(context.getProperty(DATA_TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS).intValue()); final RequestConfig requestConfig = requestConfigBuilder.build(); final StreamThrottler throttler = throttlerRef.get(); final ComponentLog logger = getLogger(); final Double maxBatchBytes = context.getProperty(MAX_BATCH_SIZE).asDataSize(DataUnit.B); String lastUrl = null; long bytesToSend = 0L; final List<FlowFile> toSend = new ArrayList<>(); DestinationAccepts destinationAccepts = null; CloseableHttpClient client = null; final String transactionId = UUID.randomUUID().toString(); final AtomicReference<String> dnHolder = new AtomicReference<>("none"); while (true) { FlowFile flowFile = session.get(); if (flowFile == null) { break; } final String url = context.getProperty(URL).evaluateAttributeExpressions(flowFile).getValue(); try { new java.net.URL(url); } catch (final MalformedURLException e) { logger.error( "After substituting attribute values for {}, URL is {}; this is not a valid URL, so routing to failure", new Object[] { flowFile, url }); flowFile = session.penalize(flowFile); session.transfer(flowFile, REL_FAILURE); continue; } // If this FlowFile doesn't have the same url, throw it back on the queue and stop grabbing FlowFiles if (lastUrl != null && !lastUrl.equals(url)) { session.transfer(flowFile); break; } lastUrl = url; toSend.add(flowFile); if (client == null || destinationAccepts == null) { final Config config = getConfig(url, context); final HttpClientConnectionManager conMan = config.getConnectionManager(); final HttpClientBuilder clientBuilder = HttpClientBuilder.create(); clientBuilder.setConnectionManager(conMan); clientBuilder.setUserAgent(userAgent); clientBuilder.addInterceptorFirst(new HttpResponseInterceptor() { @Override public void process(final HttpResponse response, final HttpContext httpContext) throws HttpException, IOException { final HttpCoreContext coreContext = HttpCoreContext.adapt(httpContext); final ManagedHttpClientConnection conn = coreContext .getConnection(ManagedHttpClientConnection.class); if (!conn.isOpen()) { return; } final SSLSession sslSession = conn.getSSLSession(); if (sslSession != null) { final Certificate[] certChain = sslSession.getPeerCertificates(); if (certChain == null || certChain.length == 0) { throw new SSLPeerUnverifiedException("No certificates found"); } try { final X509Certificate cert = CertificateUtils .convertAbstractX509Certificate(certChain[0]); dnHolder.set(cert.getSubjectDN().getName().trim()); } catch (CertificateException e) { final String msg = "Could not extract subject DN from SSL session peer certificate"; logger.warn(msg); throw new SSLPeerUnverifiedException(msg); } } } }); clientBuilder.disableAutomaticRetries(); clientBuilder.disableContentCompression(); final String username = context.getProperty(USERNAME).getValue(); final String password = context.getProperty(PASSWORD).getValue(); // set the credentials if appropriate if (username != null) { final CredentialsProvider credentialsProvider = new BasicCredentialsProvider(); if (password == null) { credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username)); } else { credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password)); } clientBuilder.setDefaultCredentialsProvider(credentialsProvider); } // Set the proxy if specified if (context.getProperty(PROXY_HOST).isSet() && context.getProperty(PROXY_PORT).isSet()) { final String host = context.getProperty(PROXY_HOST).getValue(); final int port = context.getProperty(PROXY_PORT).asInteger(); clientBuilder.setProxy(new HttpHost(host, port)); } client = clientBuilder.build(); // determine whether or not destination accepts flowfile/gzip destinationAccepts = config.getDestinationAccepts(); if (destinationAccepts == null) { try { destinationAccepts = getDestinationAcceptance(sendAsFlowFile, client, url, getLogger(), transactionId); config.setDestinationAccepts(destinationAccepts); } catch (final IOException e) { flowFile = session.penalize(flowFile); session.transfer(flowFile, REL_FAILURE); logger.error( "Unable to communicate with destination {} to determine whether or not it can accept " + "flowfiles/gzip; routing {} to failure due to {}", new Object[] { url, flowFile, e }); context.yield(); return; } } } bytesToSend += flowFile.getSize(); if (bytesToSend > maxBatchBytes.longValue()) { break; } // if we are not sending as flowfile, or if the destination doesn't accept V3 or V2 (streaming) format, // then only use a single FlowFile if (!sendAsFlowFile || !destinationAccepts.isFlowFileV3Accepted() && !destinationAccepts.isFlowFileV2Accepted()) { break; } } if (toSend.isEmpty()) { return; } final String url = lastUrl; final HttpPost post = new HttpPost(url); final List<FlowFile> flowFileList = toSend; final DestinationAccepts accepts = destinationAccepts; final boolean isDestinationLegacyNiFi = accepts.getProtocolVersion() == null; final EntityTemplate entity = new EntityTemplate(new ContentProducer() { @Override public void writeTo(final OutputStream rawOut) throws IOException { final OutputStream throttled = throttler == null ? rawOut : throttler.newThrottledOutputStream(rawOut); OutputStream wrappedOut = new BufferedOutputStream(throttled); if (compressionLevel > 0 && accepts.isGzipAccepted()) { wrappedOut = new GZIPOutputStream(wrappedOut, compressionLevel); } try (final OutputStream out = wrappedOut) { for (final FlowFile flowFile : flowFileList) { session.read(flowFile, new InputStreamCallback() { @Override public void process(final InputStream rawIn) throws IOException { try (final InputStream in = new BufferedInputStream(rawIn)) { FlowFilePackager packager = null; if (!sendAsFlowFile) { packager = null; } else if (accepts.isFlowFileV3Accepted()) { packager = new FlowFilePackagerV3(); } else if (accepts.isFlowFileV2Accepted()) { packager = new FlowFilePackagerV2(); } else if (accepts.isFlowFileV1Accepted()) { packager = new FlowFilePackagerV1(); } // if none of the above conditions is met, we should never get here, because // we will have already verified that at least 1 of the FlowFile packaging // formats is acceptable if sending as FlowFile. if (packager == null) { StreamUtils.copy(in, out); } else { final Map<String, String> flowFileAttributes; if (isDestinationLegacyNiFi) { // Old versions of NiFi expect nf.file.name and nf.file.path to indicate filename & path; // in order to maintain backward compatibility, we copy the filename & path to those attribute keys. flowFileAttributes = new HashMap<>(flowFile.getAttributes()); flowFileAttributes.put("nf.file.name", flowFile.getAttribute(CoreAttributes.FILENAME.key())); flowFileAttributes.put("nf.file.path", flowFile.getAttribute(CoreAttributes.PATH.key())); } else { flowFileAttributes = flowFile.getAttributes(); } packager.packageFlowFile(in, out, flowFileAttributes, flowFile.getSize()); } } } }); } out.flush(); } } }) { @Override public long getContentLength() { if (compressionLevel == 0 && !sendAsFlowFile && !context.getProperty(CHUNKED_ENCODING).asBoolean()) { return toSend.get(0).getSize(); } else { return -1; } } }; if (context.getProperty(CHUNKED_ENCODING).isSet()) { entity.setChunked(context.getProperty(CHUNKED_ENCODING).asBoolean()); } post.setEntity(entity); post.setConfig(requestConfig); final String contentType; if (sendAsFlowFile) { if (accepts.isFlowFileV3Accepted()) { contentType = APPLICATION_FLOW_FILE_V3; } else if (accepts.isFlowFileV2Accepted()) { contentType = APPLICATION_FLOW_FILE_V2; } else if (accepts.isFlowFileV1Accepted()) { contentType = APPLICATION_FLOW_FILE_V1; } else { logger.error( "Cannot send data to {} because the destination does not accept FlowFiles and this processor is " + "configured to deliver FlowFiles; rolling back session", new Object[] { url }); session.rollback(); context.yield(); IOUtils.closeQuietly(client); return; } } else { final String contentTypeValue = context.getProperty(CONTENT_TYPE) .evaluateAttributeExpressions(toSend.get(0)).getValue(); contentType = StringUtils.isBlank(contentTypeValue) ? DEFAULT_CONTENT_TYPE : contentTypeValue; } final String attributeHeaderRegex = context.getProperty(ATTRIBUTES_AS_HEADERS_REGEX).getValue(); if (attributeHeaderRegex != null && !sendAsFlowFile && flowFileList.size() == 1) { final Pattern pattern = Pattern.compile(attributeHeaderRegex); final Map<String, String> attributes = flowFileList.get(0).getAttributes(); for (final Map.Entry<String, String> entry : attributes.entrySet()) { final String key = entry.getKey(); if (pattern.matcher(key).matches()) { post.setHeader(entry.getKey(), entry.getValue()); } } } post.setHeader(CONTENT_TYPE_HEADER, contentType); post.setHeader(FLOWFILE_CONFIRMATION_HEADER, "true"); post.setHeader(PROTOCOL_VERSION_HEADER, PROTOCOL_VERSION); post.setHeader(TRANSACTION_ID_HEADER, transactionId); if (compressionLevel > 0 && accepts.isGzipAccepted()) { if (sendAsFlowFile) { post.setHeader(GZIPPED_HEADER, "true"); } else { post.setHeader(CONTENT_ENCODING_HEADER, CONTENT_ENCODING_GZIP_VALUE); } } // Do the actual POST final String flowFileDescription = toSend.size() <= 10 ? toSend.toString() : toSend.size() + " FlowFiles"; final String uploadDataRate; final long uploadMillis; CloseableHttpResponse response = null; try { final StopWatch stopWatch = new StopWatch(true); response = client.execute(post); // consume input stream entirely, ignoring its contents. If we // don't do this, the Connection will not be returned to the pool EntityUtils.consume(response.getEntity()); stopWatch.stop(); uploadDataRate = stopWatch.calculateDataRate(bytesToSend); uploadMillis = stopWatch.getDuration(TimeUnit.MILLISECONDS); } catch (final IOException e) { logger.error("Failed to Post {} due to {}; transferring to failure", new Object[] { flowFileDescription, e }); context.yield(); for (FlowFile flowFile : toSend) { flowFile = session.penalize(flowFile); session.transfer(flowFile, REL_FAILURE); } return; } finally { if (response != null) { try { response.close(); } catch (final IOException e) { getLogger().warn("Failed to close HTTP Response due to {}", new Object[] { e }); } } } // If we get a 'SEE OTHER' status code and an HTTP header that indicates that the intent // of the Location URI is a flowfile hold, we will store this holdUri. This prevents us // from posting to some other webservice and then attempting to delete some resource to which // we are redirected final int responseCode = response.getStatusLine().getStatusCode(); final String responseReason = response.getStatusLine().getReasonPhrase(); String holdUri = null; if (responseCode == HttpServletResponse.SC_SEE_OTHER) { final Header locationUriHeader = response.getFirstHeader(LOCATION_URI_INTENT_NAME); if (locationUriHeader != null) { if (LOCATION_URI_INTENT_VALUE.equals(locationUriHeader.getValue())) { final Header holdUriHeader = response.getFirstHeader(LOCATION_HEADER_NAME); if (holdUriHeader != null) { holdUri = holdUriHeader.getValue(); } } } if (holdUri == null) { for (FlowFile flowFile : toSend) { flowFile = session.penalize(flowFile); logger.error( "Failed to Post {} to {}: sent content and received status code {}:{} but no Hold URI", new Object[] { flowFile, url, responseCode, responseReason }); session.transfer(flowFile, REL_FAILURE); } return; } } if (holdUri == null) { if (responseCode == HttpServletResponse.SC_SERVICE_UNAVAILABLE) { for (FlowFile flowFile : toSend) { flowFile = session.penalize(flowFile); logger.error( "Failed to Post {} to {}: response code was {}:{}; will yield processing, " + "since the destination is temporarily unavailable", new Object[] { flowFile, url, responseCode, responseReason }); session.transfer(flowFile, REL_FAILURE); } context.yield(); return; } if (responseCode >= 300) { for (FlowFile flowFile : toSend) { flowFile = session.penalize(flowFile); logger.error("Failed to Post {} to {}: response code was {}:{}", new Object[] { flowFile, url, responseCode, responseReason }); session.transfer(flowFile, REL_FAILURE); } return; } logger.info("Successfully Posted {} to {} in {} at a rate of {}", new Object[] { flowFileDescription, url, FormatUtils.formatMinutesSeconds(uploadMillis, TimeUnit.MILLISECONDS), uploadDataRate }); for (final FlowFile flowFile : toSend) { session.getProvenanceReporter().send(flowFile, url, "Remote DN=" + dnHolder.get(), uploadMillis, true); session.transfer(flowFile, REL_SUCCESS); } return; } // // the response indicated a Hold URI; delete the Hold. // // determine the full URI of the Flow File's Hold; Unfortunately, the responses that are returned have // changed over the past, so we have to take into account a few different possibilities. String fullHoldUri = holdUri; if (holdUri.startsWith("/contentListener")) { // If the Hold URI that we get starts with /contentListener, it may not really be /contentListener, // as this really indicates that it should be whatever we posted to -- if posting directly to the // ListenHTTP component, it will be /contentListener, but if posting to a proxy/load balancer, we may // be posting to some other URL. fullHoldUri = url + holdUri.substring(16); } else if (holdUri.startsWith("/")) { // URL indicates the full path but not hostname or port; use the same hostname & port that we posted // to but use the full path indicated by the response. int firstSlash = url.indexOf("/", 8); if (firstSlash < 0) { firstSlash = url.length(); } final String beforeSlash = url.substring(0, firstSlash); fullHoldUri = beforeSlash + holdUri; } else if (!holdUri.startsWith("http")) { // Absolute URL fullHoldUri = url + (url.endsWith("/") ? "" : "/") + holdUri; } final HttpDelete delete = new HttpDelete(fullHoldUri); delete.setHeader(TRANSACTION_ID_HEADER, transactionId); while (true) { try { final HttpResponse holdResponse = client.execute(delete); EntityUtils.consume(holdResponse.getEntity()); final int holdStatusCode = holdResponse.getStatusLine().getStatusCode(); final String holdReason = holdResponse.getStatusLine().getReasonPhrase(); if (holdStatusCode >= 300) { logger.error( "Failed to delete Hold that destination placed on {}: got response code {}:{}; routing to failure", new Object[] { flowFileDescription, holdStatusCode, holdReason }); for (FlowFile flowFile : toSend) { flowFile = session.penalize(flowFile); session.transfer(flowFile, REL_FAILURE); } return; } logger.info("Successfully Posted {} to {} in {} milliseconds at a rate of {}", new Object[] { flowFileDescription, url, uploadMillis, uploadDataRate }); for (final FlowFile flowFile : toSend) { session.getProvenanceReporter().send(flowFile, url); session.transfer(flowFile, REL_SUCCESS); } return; } catch (final IOException e) { logger.warn("Failed to delete Hold that destination placed on {} due to {}", new Object[] { flowFileDescription, e }); } if (!isScheduled()) { context.yield(); logger.warn( "Failed to delete Hold that destination placed on {}; Processor has been stopped so routing FlowFile(s) to failure", new Object[] { flowFileDescription }); for (FlowFile flowFile : toSend) { flowFile = session.penalize(flowFile); session.transfer(flowFile, REL_FAILURE); } return; } } }
From source file:org.codelibs.robot.client.http.HcHttpClient.java
public synchronized void init() { if (httpClient != null) { return;/*from w ww. j av a 2 s.c o m*/ } if (logger.isDebugEnabled()) { logger.debug("Initializing " + HcHttpClient.class.getName()); } // access timeout final Integer accessTimeoutParam = getInitParameter(ACCESS_TIMEOUT_PROPERTY, accessTimeout); if (accessTimeoutParam != null) { accessTimeout = accessTimeoutParam; } // robots.txt parser final Boolean robotsTxtEnabled = getInitParameter(ROBOTS_TXT_ENABLED_PROPERTY, Boolean.TRUE); if (robotsTxtHelper != null) { robotsTxtHelper.setEnabled(robotsTxtEnabled.booleanValue()); } // httpclient final org.apache.http.client.config.RequestConfig.Builder requestConfigBuilder = RequestConfig.custom(); final HttpClientBuilder httpClientBuilder = HttpClientBuilder.create(); final Integer connectionTimeoutParam = getInitParameter(CONNECTION_TIMEOUT_PROPERTY, connectionTimeout); if (connectionTimeoutParam != null) { requestConfigBuilder.setConnectTimeout(connectionTimeoutParam); } final Boolean staleCheckingEnabledParam = getInitParameter(STALE_CHECKING_ENABLED_PROPERTY, staleCheckingEnabled); if (staleCheckingEnabledParam != null) { requestConfigBuilder.setStaleConnectionCheckEnabled(staleCheckingEnabledParam); } final Integer soTimeoutParam = getInitParameter(SO_TIMEOUT_PROPERTY, soTimeout); if (soTimeoutParam != null) { requestConfigBuilder.setSocketTimeout(soTimeoutParam); } // AuthSchemeFactory final RegistryBuilder<AuthSchemeProvider> authSchemeProviderBuilder = RegistryBuilder.create(); final Map<String, AuthSchemeProvider> factoryMap = getInitParameter(AUTH_SCHEME_PROVIDERS_PROPERTY, authSchemeProviderMap); if (factoryMap != null) { for (final Map.Entry<String, AuthSchemeProvider> entry : factoryMap.entrySet()) { authSchemeProviderBuilder.register(entry.getKey(), entry.getValue()); } } // user agent userAgent = getInitParameter(USER_AGENT_PROPERTY, userAgent); if (StringUtil.isNotBlank(userAgent)) { httpClientBuilder.setUserAgent(userAgent); } final HttpRoutePlanner planner = buildRoutePlanner(); if (planner != null) { httpClientBuilder.setRoutePlanner(planner); } // Authentication final Authentication[] siteCredentialList = getInitParameter(BASIC_AUTHENTICATIONS_PROPERTY, new Authentication[0]); for (final Authentication authentication : siteCredentialList) { final AuthScope authScope = authentication.getAuthScope(); credentialsProvider.setCredentials(authScope, authentication.getCredentials()); final AuthScheme authScheme = authentication.getAuthScheme(); if (authScope.getHost() != null && authScheme != null) { final HttpHost targetHost = new HttpHost(authScope.getHost(), authScope.getPort()); authCache.put(targetHost, authScheme); } } httpClientContext.setAuthCache(authCache); httpClientContext.setCredentialsProvider(credentialsProvider); // Request Header final RequestHeader[] requestHeaders = getInitParameter(REQUERT_HEADERS_PROPERTY, new RequestHeader[0]); for (final RequestHeader requestHeader : requestHeaders) { if (requestHeader.isValid()) { requestHeaderList.add(new BasicHeader(requestHeader.getName(), requestHeader.getValue())); } } // do not redirect requestConfigBuilder.setRedirectsEnabled(false); // cookie if (cookieSpec != null) { requestConfigBuilder.setCookieSpec(cookieSpec); } // cookie store httpClientBuilder.setDefaultCookieStore(cookieStore); if (cookieStore != null) { final Cookie[] cookies = getInitParameter(COOKIES_PROPERTY, new Cookie[0]); for (final Cookie cookie : cookies) { cookieStore.addCookie(cookie); } } connectionMonitorTask = TimeoutManager.getInstance().addTimeoutTarget( new HcConnectionMonitorTarget(clientConnectionManager, idleConnectionTimeout), connectionCheckInterval, true); final CloseableHttpClient closeableHttpClient = httpClientBuilder .setConnectionManager(clientConnectionManager).setDefaultRequestConfig(requestConfigBuilder.build()) .build(); if (!httpClientPropertyMap.isEmpty()) { final BeanDesc beanDesc = BeanDescFactory.getBeanDesc(closeableHttpClient.getClass()); for (final Map.Entry<String, Object> entry : httpClientPropertyMap.entrySet()) { final String propertyName = entry.getKey(); if (beanDesc.hasPropertyDesc(propertyName)) { final PropertyDesc propertyDesc = beanDesc.getPropertyDesc(propertyName); propertyDesc.setValue(closeableHttpClient, entry.getValue()); } else { logger.warn("DefaultHttpClient does not have " + propertyName + "."); } } } httpClient = closeableHttpClient; }
From source file:org.opennms.core.web.HttpClientWrapper.java
protected void configureSSLContext(final HttpClientBuilder builder) { final RegistryBuilder<ConnectionSocketFactory> registryBuilder = RegistryBuilder .<ConnectionSocketFactory>create(); for (final Map.Entry<String, SSLContext> entry : m_sslContext.entrySet()) { final SSLConnectionSocketFactory sslConnectionFactory = new SSLConnectionSocketFactory(entry.getValue(), SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER); registryBuilder.register(entry.getKey(), sslConnectionFactory); }// w w w . j a va 2 s. co m if (!m_sslContext.containsKey("http")) { registryBuilder.register("http", PlainConnectionSocketFactory.INSTANCE); } if (!m_sslContext.containsKey("https")) { registryBuilder.register("https", SSLConnectionSocketFactory.getSystemSocketFactory()); } final HttpClientConnectionManager ccm = new BasicHttpClientConnectionManager(registryBuilder.build()); builder.setConnectionManager(ccm); }
From source file:org.tanaguru.util.http.HttpRequestHandler.java
private CloseableHttpClient getHttpClient(String url) { RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout) .setConnectTimeout(connectionTimeout).build(); HttpClientBuilder httpClientBuilder = HttpClientBuilder.create(); httpClientBuilder.setDefaultRequestConfig(requestConfig); httpClientBuilder.setConnectionManager(new PoolingHttpClientConnectionManager()); httpClientBuilder.setUserAgent(TANAGURU_USER_AGENT); if (isProxySet(url)) { LOGGER.debug(("Set proxy with " + proxyHost + " and " + proxyPort)); httpClientBuilder.setProxy(new HttpHost(proxyHost, Integer.valueOf(proxyPort))); if (isProxyCredentialSet()) { CredentialsProvider credsProvider = new BasicCredentialsProvider(); credsProvider.setCredentials(new AuthScope(proxyHost, Integer.valueOf(proxyPort)), new UsernamePasswordCredentials(proxyUser, proxyPassword)); httpClientBuilder.setDefaultCredentialsProvider(credsProvider); LOGGER.debug(("Set proxy credentials " + proxyHost + " and " + proxyPort + " and " + proxyUser + " and " + proxyPassword)); }// w w w.j a v a2 s . c o m } return httpClientBuilder.build(); }
From source file:org.xwiki.extension.repository.http.internal.DefaultHttpClientFactory.java
@Override public HttpClientBuilder createHttpClientBuilder(Map<String, String> properties) { HttpClientBuilder httpClientBuilder = createHttpClientBuilder(properties.get("auth.user"), properties.get("auth.password")); // Set socket timeouts BasicHttpClientConnectionManager connectionManager = new BasicHttpClientConnectionManager(); SocketConfig.Builder socketConfigBuilder = SocketConfig.custom(); socketConfigBuilder.setSoTimeout(getIntProperty(properties, SOCKET_TIMEOUT, 30000)); connectionManager.setSocketConfig(socketConfigBuilder.build()); httpClientBuilder.setConnectionManager(connectionManager); // Set request timeouts RequestConfig.Builder requestBuilder = RequestConfig.custom(); requestBuilder = requestBuilder.setConnectTimeout(getIntProperty(properties, CONNECTION_TIMEOUT, 30000)); httpClientBuilder.setDefaultRequestConfig(requestBuilder.build()); return httpClientBuilder; }