使用Vysper，TomEE和PrimeFaces将XMPP服务器嵌入JSF Web应用程序内部

我有一个需要在完成某些工作时通知用户的应用程序。它使用JSF和Primefaces，因此可以使用大气（也称为Push）来实现这种通知。

但是另一个有趣的方法是使用嵌入在Java Web应用程序中的XMPP服务器。好的，好的，您不必嵌入它，只需运行一个工业级XMPP服务器的实例，例如Openfire和Tigase即可。但是，嘿，我们只是在玩些游戏，所以我将向您展示如何使用Vysper进行操作， Vysper是使用Apache Mina开发的概念验证游戏，只需几分钟即可轻松完成。

在展示如何做之前，很高兴记住线程和JEE应用程序通常不会混合使用，因此我们可以玩，但是我们必须知道我们在做什么。

首先，您将需要这些JAR，其中大多数来自Vysper。只是几个？

aopalliance-1.0.jar
commons-codec-1.4.jar
commons-collections-3.1.jar
commons-io-1.4.jar
commons-lang-2.5.jar
commons-logging-1.1.jar
并发1.3.4.jar
derby-10.2.1.6.jar
dnsjava-2.0.8.jar
ehcache-core-2.2.0.jar
fontbox-0.1.0.jar
jackrabbit-api-1.5.0.jar
jackrabbit-core-1.5.3.jar
jackrabbit-jcr-commons-1.5.3.jar
jackrabbit-spi-1.5.0.jar
jackrabbit-spi-commons-1.5.0.jar
jackrabbit-text-extractors-1.5.0.jar
jcl-over-slf4j-1.5.3.jar
jcr-1.0.jar
jempbox-0.2.0.jar
jetty-continuation-7.2.1.v20101111.jar
jetty-http-7.2.1.v20101111.jar
jetty-io-7.2.1.v20101111.jar
jetty-security-7.2.1.v20101111.jar
jetty-server-7.2.1.v20101111.jar
jetty-servlet-7.2.1.v20101111.jar
jetty-util-7.2.1.v20101111.jar
jetty-websocket-7.2.1.v20101111.jar
log4j-1.2.14.jar
lucene-core-2.3.2.jar
mina-core-2.0.2.jar
nbxml-0.7.jar
nekohtml-1.9.7.jar
pdfbox-0.7.3.jar
poi-3.0.2-FINAL.jar
poi-scratchpad-3.0.2-FINAL.jar
primefaces-4.0.jar
servlet-api-2.5.jar
slf4j-api-1.5.3.jar
slf4j-log4j12-1.5.3.jar
smack-3.1.0.jar
smackx-3.1.0.jar
spec-compliance-0.7.jar
弹簧-aop-3.0.5.RELEASE.jar
弹簧-asm-3.0.5.RELEASE.jar
Spring Bean3.0.5.RELEASE.jar
spring-context-3.0.5.RELEASE.jar
弹簧核心-3.0.5.RELEASE.jar
spring-expression-3.0.5.RELEASE.jar
vysper-core-0.7.jar
vysper-websockets-0.7.jar
xep0045-muc-0.7.jar
xep0060-pubsub-0.7.jar
xep0124-xep0206-bosh-0.7.jar
xercesImpl-2.8.1.jar
xml-apis-1.3.03.jar

现在，从Vysper复制虚假证书，以便您的XMPP服务器可以在“安全”通道下“工作”。它称为bogus_mina_tls.cert。

我的xhtml看起来像这样：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"xmlns:f="http://java.sun.com/jsf/core"xmlns:h="http://java.sun.com/jsf/html"xmlns:ui="http://java.sun.com/jsf/facelets"xmlns:p="http://primefaces.org/ui">
<h:head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Messaging Prototype</title><link rel="icon" type="image/png" href="favicon.ico"></link>
</h:head>
<h:body>    <h:outputStylesheet library="css" name="style.css"  /><p:ajaxStatus style="width:16px;height:16px;" id="ajaxStatusPanel">  <f:facet name="start">  <h:graphicImage value="./ajaxloading.gif" />  </f:facet>  <f:facet name="complete">  <h:outputText value="" />  </f:facet>  </p:ajaxStatus>  <h:form>    <p:messages id="messages" showDetail="true" autoUpdate="true" closable="true" /><p:spacer height="10" /><p:panel><h:panelGrid columns="2"><p:commandButton value="Enter" action="#{messagingMB.sendMessage}" /></h:panelGrid></p:panel><p:spacer height="10" /></h:form>
</h:body>
</html>

很简单吧？托管Bean也很容易。

import java.io.Serializable;import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;import org.jivesoftware.smack.XMPPException;@ManagedBean
@ViewScoped
public class MessagingMB implements Serializable {private static final long    serialVersionUID    = -9092497421080796430L;@EJBprivate JSFUtilEJB jsfUtilEJB;@PostConstructpublic void init() {}public void sendMessage() {try {new BasicClient().test();} catch (XMPPException e) {jsfUtilEJB.addErrorMessage(e,"Could not send");}}
}

当然，EJB：

import javax.ejb.Stateless;
import javax.faces.application.FacesMessage;
import javax.faces.application.FacesMessage.Severity;
import javax.faces.context.FacesContext;@Stateless
public class JSFUtilEJB {@SuppressWarnings("unchecked")public <T> T findBean(String beanName) {FacesContext context = FacesContext.getCurrentInstance();return (T) context.getApplication().evaluateExpressionGet(context, "#{" + beanName + "}", Object.class);}public long addErrorMessage(String msg) {return addMessage(null,FacesMessage.SEVERITY_ERROR,msg);}public long addErrorMessage(Exception e,String summary){return addMessage(e,FacesMessage.SEVERITY_ERROR,summary);}public long addFatalErrorMessage(Exception e,String summary){return addMessage(e,FacesMessage.SEVERITY_FATAL,summary);}public long addInfoMessage(String summary){return addMessage(null,FacesMessage.SEVERITY_INFO,summary);}public long addWarnMessage(Exception e,String summary){return addMessage(e,FacesMessage.SEVERITY_WARN,summary);}public long addErrorMessage(Exception e) {return addMessage(e,FacesMessage.SEVERITY_ERROR,e.getMessage(),e.getClass().getSimpleName());}private long addMessage(Exception e,Severity severity, String summary) {FacesContext context = FacesContext.getCurrentInstance();String clientId = null;long id = -1;if (e != null){id = printStackTrace(e);FacesMessage facesMessage = null;if (e.getCause() instanceof org.apache.openjpa.persistence.EntityExistsException){facesMessage = new FacesMessage(severity,"[Error: #"+id+"] "+summary,"You are trying are to add a new object that already exists or your're trying to violate a unique constraint)" );    }else{facesMessage = new FacesMessage(severity,"[Error: #"+id+"] "+summary,e.getMessage() );}context.addMessage(clientId , facesMessage );}else{FacesMessage facesMessage = new FacesMessage(severity,summary," ");context.addMessage(clientId , facesMessage );}return id;}private long addMessage(Exception e,Severity severity, String summary, String detail) {FacesContext context = FacesContext.getCurrentInstance();String clientId = null;long id = -1;if (e != null){id = printStackTrace(e);        FacesMessage facesMessage = new FacesMessage(severity,"["+id+"] "+summary,detail );context.addMessage(clientId , facesMessage );}else{FacesMessage facesMessage = new FacesMessage(severity,summary,detail );context.addMessage(clientId , facesMessage );}return id;}public long printStackTrace(Exception e){long uniqueId = System.currentTimeMillis();return uniqueId;}}

和

import java.io.File;
import java.io.Serializable;import javax.annotation.PostConstruct;
import javax.ejb.Singleton;
import javax.ejb.Startup;import org.apache.vysper.mina.TCPEndpoint;
import org.apache.vysper.storage.StorageProviderRegistry;
import org.apache.vysper.storage.inmemory.MemoryStorageProviderRegistry;
import org.apache.vysper.xmpp.addressing.EntityImpl;
import org.apache.vysper.xmpp.authorization.AccountManagement;
import org.apache.vysper.xmpp.server.XMPPServer;@Startup
@Singleton
public class XmppEJB implements Serializable {/*** <br>06/09/2014*/private static final long serialVersionUID = 1L;private boolean started;@PostConstructpublic void init() {try {// choose the storage you want to use//        StorageProviderRegistry providerRegistry = new JcrStorageProviderRegistry();StorageProviderRegistry providerRegistry = new MemoryStorageProviderRegistry();final AccountManagement accountManagement = (AccountManagement) providerRegistry.retrieve(AccountManagement.class);if(!accountManagement.verifyAccountExists(EntityImpl.parse("user1@vysper.org"))) {accountManagement.addUser(EntityImpl.parse("user1@vysper.org"), "password");}if(!accountManagement.verifyAccountExists(EntityImpl.parse("user2@vysper.org"))) {accountManagement.addUser(EntityImpl.parse("user2@vysper.org"), "password");}XMPPServer server = new XMPPServer("vysper.org");server.addEndpoint(new TCPEndpoint());server.setStorageProviderRegistry(providerRegistry);server.setTLSCertificateInfo(new File("/path/to/bogus_mina_tls.cert"), "boguspw");server.start();System.out.println("server is running...");} catch (Exception e) {e.printStackTrace();}started = true;}public boolean isStarted() {return this.started;}}

和基本客户，来自Vysper 。

import java.util.Date;import org.jivesoftware.smack.Chat;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.MessageListener;
import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.SASLAuthentication;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.PacketExtension;
import org.jivesoftware.smack.packet.Presence;
import org.jivesoftware.smackx.packet.Time;
import org.jivesoftware.smackx.packet.Version;public class BasicClient {static class IQListener implements PacketListener {public void processPacket(Packet packet) {IQ iq = (IQ) packet;String iqString = iq.toString();System.out.println("T" + System.currentTimeMillis() + " IQ: "+ iqString + ": " + iq.toXML());}}static class PresenceListener implements PacketListener {public void processPacket(Packet packet) {Presence presence = (Presence) packet;String iqString = presence.toString();final PacketExtension extension = presence.getExtension("http://jabber.org/protocol/caps");if (extension != null)System.out.println("T" + System.currentTimeMillis() + " Pres: "+ iqString + ": " + presence.toXML());}}public void test() throws XMPPException {String me = "user2@vysper.org";String to = "user1@vysper.org";try {ConnectionConfiguration connectionConfiguration = new ConnectionConfiguration("localhost");connectionConfiguration.setCompressionEnabled(false);connectionConfiguration.setSelfSignedCertificateEnabled(true);connectionConfiguration.setExpiredCertificatesCheckEnabled(false);
//            connectionConfiguration.setDebuggerEnabled(true);connectionConfiguration.setSecurityMode(ConnectionConfiguration.SecurityMode.required);
//            XMPPConnection.DEBUG_ENABLED = true;XMPPConnection connection = new XMPPConnection(connectionConfiguration);connection.connect();SASLAuthentication saslAuthentication = connection.getSASLAuthentication();saslAuthentication.authenticate(me, "password", "test");connection.login(me, "pqssword");connection.getRoster().setSubscriptionMode(Roster.SubscriptionMode.accept_all);connection.addPacketListener(new IQListener(), new PacketFilter() {public boolean accept(Packet packet) {return packet instanceof IQ;}});connection.addPacketListener(new PresenceListener(),new PacketFilter() {public boolean accept(Packet packet) {return packet instanceof Presence;}});Chat chat = null;if (to != null) {Presence presence = new Presence(Presence.Type.subscribe);presence.setFrom(connection.getUser());String toEntity = to;presence.setTo(toEntity);connection.sendPacket(presence);chat = connection.getChatManager().createChat(toEntity,new MessageListener() {public void processMessage(Chat inchat,Message message) {System.out.println("log received message: "+ message.getBody());}});}connection.sendPacket(new Presence(Presence.Type.available,"pommes", 1, Presence.Mode.available));Thread.sleep(1000);// query server versionsendIQGetWithTimestamp(connection, new Version());// query server timesendIQGetWithTimestamp(connection, new Time());chat.sendMessage("Hello " + to + " at " + new Date());connection.disconnect();} catch (Throwable e) {e.printStackTrace(); // To change body of catch statement use File |// Settings | File Templates.}System.out.println("bye");}private static void sendIQGetWithTimestamp(XMPPConnection connection, IQ iq) {iq.setType(IQ.Type.GET);connection.sendPacket(iq);System.out.println("T" + System.currentTimeMillis()+ " IQ request sent");}
}

我们快要准备好了。当然，现在我们需要一个XMPP客户端，例如Pidgin 。

首先，让我对这个博客表示感谢，因为我不知道为什么，Vysper站点几乎没有关于如何配置Pidgin的信息，因此这篇博客非常有用。

让我向您展示我的pidgin用户的样子：

我知道，是葡萄牙语。

就是这样。我们都准备好了。启动您的JSF Web应用程序并播放。

请注意，通信是双向的，因此您可以仅使用XMPP客户端将命令发送到服务器。为此，您只需要更改此侦听器即可：

chat = connection.getChatManager().createChat(toEntity,new MessageListener() {public void processMessage(Chat inchat,Message message) {System.out.println("log received message: "+ message.getBody());}});

我想知道我们是否可以创建一个DSL来处理一些命令，是否可以找到一些自动完成的pidgin插件来使用该DSL编写命令。欢迎提出建议！

ps。 EJB不能正常关闭服务器。但是我敢打赌，如果服务器关闭，有一些EJB注释可以做到这一点。

翻译自: https://www.javacodegeeks.com/2014/09/embedding-a-xmpp-server-inside-your-jsf-web-application-using-vysper-tomee-and-primefaces.html

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