Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.camel.component.cm; import java.io.BufferedReader; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.nio.charset.Charset; import java.util.UUID; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.OutputKeys; import javax.xml.transform.Result; import javax.xml.transform.Source; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.DOMImplementation; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Text; import org.apache.camel.component.cm.exceptions.MessagingException; import org.apache.camel.component.cm.exceptions.ProviderException; import org.apache.camel.component.cm.exceptions.XMLConstructionException; import org.apache.camel.component.cm.exceptions.cmresponse.CMResponseException; import org.apache.camel.component.cm.exceptions.cmresponse.InsufficientBalanceException; import org.apache.camel.component.cm.exceptions.cmresponse.InvalidProductTokenException; import org.apache.camel.component.cm.exceptions.cmresponse.NoAccountFoundForProductTokenException; import org.apache.camel.component.cm.exceptions.cmresponse.UnknownErrorException; import org.apache.camel.component.cm.exceptions.cmresponse.UnroutableMessageException; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.HttpClientBuilder; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class CMSenderOneMessageImpl implements CMSender { private static final Logger LOG = LoggerFactory.getLogger(CMSenderOneMessageImpl.class); private final String url; private final UUID productToken; public CMSenderOneMessageImpl(final String url, final UUID productToken) { this.url = url; this.productToken = productToken; } /** * Sends a previously validated SMSMessage to CM endpoint */ @Override public void send(final CMMessage cmMessage) throws MessagingException { // See: Check https://dashboard.onlinesmsgateway.com/docs for responses try { // 1.Construct XML. Throws XMLConstructionException final String xml = createXml(cmMessage); // 2. Try to send to CM SMS Provider ...Throws CMResponse doHttpPost(url, xml); } catch (final RuntimeException e) { LOG.error("Failed to send SMS: {}", cmMessage, e); throw e; // XMLConstrucion o } } private String createXml(final CMMessage message) { try { final ByteArrayOutputStream xml = new ByteArrayOutputStream(); final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); factory.setNamespaceAware(true); // Get the DocumentBuilder final DocumentBuilder docBuilder = factory.newDocumentBuilder(); // Create blank DOM Document final DOMImplementation impl = docBuilder.getDOMImplementation(); final Document doc = impl.createDocument(null, "MESSAGES", null); // ROOT Element es MESSAGES final Element root = doc.getDocumentElement(); // AUTHENTICATION element final Element authenticationElement = doc.createElement("AUTHENTICATION"); final Element productTokenElement = doc.createElement("PRODUCTTOKEN"); authenticationElement.appendChild(productTokenElement); final Text productTokenValue = doc.createTextNode("" + productToken); productTokenElement.appendChild(productTokenValue); root.appendChild(authenticationElement); // MSG Element final Element msgElement = doc.createElement("MSG"); root.appendChild(msgElement); // <FROM>VALUE</FROM> final Element fromElement = doc.createElement("FROM"); fromElement.appendChild(doc.createTextNode(message.getSender())); msgElement.appendChild(fromElement); // <BODY>VALUE</BODY> final Element bodyElement = doc.createElement("BODY"); bodyElement.appendChild(doc.createTextNode(message.getMessage())); msgElement.appendChild(bodyElement); // <TO>VALUE</TO> final Element toElement = doc.createElement("TO"); toElement.appendChild(doc.createTextNode(message.getPhoneNumber())); msgElement.appendChild(toElement); // <DCS>VALUE</DCS> - if UNICODE - messageOut.isGSM338Enc // false if (message.isUnicode()) { final Element dcsElement = doc.createElement("DCS"); dcsElement.appendChild(doc.createTextNode("8")); msgElement.appendChild(dcsElement); } // <REFERENCE>VALUE</REFERENCE> -Alfanum final String id = message.getIdAsString(); if (id != null && !id.isEmpty()) { final Element refElement = doc.createElement("REFERENCE"); refElement.appendChild(doc.createTextNode("" + message.getIdAsString())); msgElement.appendChild(refElement); } // <MINIMUMNUMBEROFMESSAGEPARTS>1</MINIMUMNUMBEROFMESSAGEPARTS> // <MAXIMUMNUMBEROFMESSAGEPARTS>8</MAXIMUMNUMBEROFMESSAGEPARTS> if (message.isMultipart()) { final Element minMessagePartsElement = doc.createElement("MINIMUMNUMBEROFMESSAGEPARTS"); minMessagePartsElement.appendChild(doc.createTextNode("1")); msgElement.appendChild(minMessagePartsElement); final Element maxMessagePartsElement = doc.createElement("MAXIMUMNUMBEROFMESSAGEPARTS"); maxMessagePartsElement.appendChild(doc.createTextNode(Integer.toString(message.getMultiparts()))); msgElement.appendChild(maxMessagePartsElement); } // Creatate XML as String final Transformer aTransformer = TransformerFactory.newInstance().newTransformer(); aTransformer.setOutputProperty(OutputKeys.INDENT, "yes"); final Source src = new DOMSource(doc); final Result dest = new StreamResult(xml); aTransformer.transform(src, dest); return xml.toString(); } catch (final TransformerException e) { LOG.error("Cant serialize CMMessage {}: ", message, e); throw new XMLConstructionException(e); } catch (final ParserConfigurationException e) { LOG.error("Cant serialize CMMessage {}: ", message, e); throw new XMLConstructionException(e); } } private void doHttpPost(final String urlString, final String requestString) { final HttpClient client = HttpClientBuilder.create().build(); final HttpPost post = new HttpPost(urlString); post.setEntity(new StringEntity(requestString, Charset.forName("UTF-8"))); try { final HttpResponse response = client.execute(post); final int statusCode = response.getStatusLine().getStatusCode(); LOG.debug("Response Code : {}", statusCode); if (statusCode == 400) { throw new ProviderException("CM Component and CM API show some kind of inconsistency. " + "CM is complaining about not using a post method for the request. And this component only uses POST requests. What happens?"); } if (statusCode != 200) { throw new ProviderException( "CM Component and CM API show some kind of inconsistency. The component expects the status code to be 200 or 400. New api released? "); } // So we have 200 status code... // The response type is 'text/plain' and contains the actual // result of the request processing. // We obtaing the result text final BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); final StringBuffer result = new StringBuffer(); String line = null; while ((line = rd.readLine()) != null) { result.append(line); } // ... and process it line = result.toString(); if (!line.isEmpty()) { // Line is not empty = error LOG.debug("Result of the request processing: FAILED\n{}", line); // The response text contains the error description. We will // throw a custom exception for each. if (line.contains(CMConstants.ERROR_UNKNOWN)) { throw new UnknownErrorException(); } else if (line.contains(CMConstants.ERROR_NO_ACCOUNT)) { throw new NoAccountFoundForProductTokenException(); } else if (line.contains(CMConstants.ERROR_INSUFICIENT_BALANCE)) { throw new InsufficientBalanceException(); } else if (line.contains(CMConstants.ERROR_UNROUTABLE_MESSAGE)) { throw new UnroutableMessageException(); } else if (line.contains(CMConstants.ERROR_INVALID_PRODUCT_TOKEN)) { throw new InvalidProductTokenException(); } else { // SO FAR i would expect other kind of ERROR. // MSISDN correctness and message validity is client // responsibility throw new CMResponseException("CHECK ME. I am not expecting this. "); } } // Ok. Line is EMPTY - successfully submitted LOG.debug("Result of the request processing: Successfully submited"); } catch (final IOException io) { throw new ProviderException(io); } catch (Throwable t) { if (!(t instanceof MessagingException)) { // Chain it t = new MessagingException(t); } throw (MessagingException) t; } } }