Jetty で Camel Websocket コンポーネントを使用しようとしていますが、次の例外を取り除くことができません。これが Camel で実行されている Jetty の問題なのか、バージョンの互換性の問題なのか、コードに何かが欠けているのかはわかりません。
誰かが試してみたい場合に備えて、プロジェクトを Github に置きました。 https://github.com/soumyasd/jettycamelwebsocket
アプリケーションを実行する手順は次のとおりです。
このクラス src/main/java/demo/websocket/ で Twitter 資格情報を更新します。
$mvn clean install
$mvn jetty:run
Web ブラウザ (私は Google Chrome を使用しました) を
http://localhost:8080/index.html
java.lang.NullPointerException
at org.eclipse.jetty.websocket.WebSocketFactory.upgrade(WebSocketFactory.java:236)[jetty-websocket-8.1.9.v20130131.jar:8.1.9.v20130131]
at org.eclipse.jetty.websocket.WebSocketFactory.acceptWebSocket(WebSocketFactory.java:382)[jetty-websocket-8.1.9.v20130131.jar:8.1.9.v20130131]
at org.eclipse.jetty.websocket.WebSocketServlet.service(WebSocketServlet.java:104)[jetty-websocket-7.6.8.v20121106.jar:7.6.8.v20121106]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)[javax.servlet-3.0.0.v201112011016.jar:]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598)[jetty-servlet-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)[jetty-servlet-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)[jetty-servlet-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.Server.handle(Server.java:350)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:454)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:890)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:944)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:630)[jetty-http-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230)[jetty-http-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77)[jetty-server-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606)[jetty-io-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46)[jetty-io-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603)[jetty-util-8.1.3.v20120416.jar:8.1.9.v20130131]
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538)[jetty-util-8.1.3.v20120416.jar:8.1.9.v20130131]
at java.lang.Thread.run(Thread.java:680)[:1.6.0_45]
これが私のメインの Camel ルートです。
package demo.websocket;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.twitter.TwitterComponent;
import org.apache.camel.component.websocket.WebsocketComponent;
public class TwitterStreamRoute extends RouteBuilder{
//put your twitter keys here to test
public final String CONSUMER_KEY = "";
public final String CONSUMER_SECRET = "";
public final String ACCESS_TOKEN = "";
public final String ACCESS_TOKEN_SECRET = "";
@Override
public void configure() throws Exception {
TwitterComponent tc = getContext().getComponent("twitter", TwitterComponent.class);
tc.setAccessToken(ACCESS_TOKEN);
tc.setAccessTokenSecret(ACCESS_TOKEN_SECRET);
tc.setConsumerKey(CONSUMER_KEY);
tc.setConsumerSecret(CONSUMER_SECRET);
fromF("twitter://streaming/filter?type=polling&delay=%s&keywords=%s", "5", "pittsburgh")
.process(new Processor() {
@Override
public void process(Exchange exchange) throws Exception {
String res = exchange.getIn().getBody().toString();
exchange.getOut().setBody(res);
}
})
.to("websocket://0.0.0.0:9292/camel-tweet?sendToAll=true");
}
}
Camel の構成は次のようになります。
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:camel="http://camel.apache.org/schema/spring"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">
<!-- Here we define Camel, notice the namespace it uses -->
<camelContext xmlns="http://camel.apache.org/schema/spring" trace="true">
<routeBuilder ref="twitter-route-id" ></routeBuilder>
</camelContext>
<bean id="twitter-route-id" class="demo.websocket.TwitterStreamRoute" />
</beans>
私のweb.xmlは次のようになります
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:camel="http://camel.apache.org/schema/spring"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<!-- your web.xml content here -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:camel-config.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<display-name>Archetype Created Web Application</display-name>
</web-app>
〜
pom.xml で次のバージョンを使用しています。完全な pom.xml はこちらです。
<properties>
<spring.version>3.2.2.RELEASE</spring.version>
<camel.version>2.11.0</camel.version>
<jetty.version>8.1.3.v20120416</jetty.version>
</properties>
更新 (2013 年 5 月 6 日、東部標準時午後 3 時 4 分)
Claus Ibsen の提案に従って、Jetty 7.6.x リリースを使用するように pom.xml を更新しました。しかし、私はまだ同じエラーが発生しています。また、この場合、stackstrace の WebSocketFactory と WebSocketServlet のバージョン番号は同じです。
java.lang.NullPointerException
at org.eclipse.jetty.websocket.WebSocketFactory.upgrade(WebSocketFactory.java:236)[jetty-websocket-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.websocket.WebSocketFactory.acceptWebSocket(WebSocketFactory.java:382)[jetty-websocket-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.websocket.WebSocketServlet.service(WebSocketServlet.java:104)[jetty-websocket-7.6.8.v20121106.jar:7.6.8.v20121106]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)[javax.servlet-2.5.0.v201103041518.jar:]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652)[jetty-servlet-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:447)[jetty-servlet-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1038)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:374)[jetty-servlet-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:972)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.Server.handle(Server.java:363)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:483)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:920)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:982)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635)[jetty-http-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)[jetty-http-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)[jetty-server-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)[jetty-io-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)[jetty-io-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)[jetty-util-7.6.8.v20121106.jar:7.6.8.v20121106]
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)[jetty-util-7.6.8.v20121106.jar:7.6.8.v20121106]
at java.lang.Thread.run(Thread.java:662)[:1.6.0_32]
更新 2 (2013 年 5 月 6 日午後 4 時 6 分 EST) @JoakimErdfelt のコメントで提案されているように、リクエスト応答情報を含む Google Chrome ファイルはこちらです。