I am trying to work through an example from the camel website, namely
camel-example-servlet-tomcat. I want to get a web application working that
takes input from a web service request and uses it as the data with which to
start a camel route. I am running Tomcat 7.0.63, Netbeans 8.02, Windows 10 Pro.
Java 1.7, Maven 3.0.4.
I can build the application; when I run it the initial page appears, with the
link that's supposed to invoke the camel-based route; on clicking that link, or
on entering any variation of its URL, I get 404, resource not available.
I tried copying the source for CamelHttpTransportServlet to another class and
configuring that one as CamelServlet, so that I could set breakpoints and see
what is happening. I can hit breakpoints there but still don't know why it
isn't working.
I do not understand what part of this invokes .start() on Camel, and wonder if
I'm missing some step that does that. One difficulty I have with the
documentation is that it seems to treat all the examples as a block, invoking
parent poms and giving instructions on compiling all of them together; I didn't
want to do this but finally attempted it; it requires not only a more recent
version of Maven than we use in my shop but a more recent version of Java, so
that route is really frought. This example is so simple, surely someone can
tell me what I'm doing wrong.
I have the following web.xml:
---
<web-app version="1.1"
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";>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:camel-config.xml</param-value>
</context-param>
<listener>
<!--
listener-class>org.apache.camel.component.servletlistener.SimpleCamelServletContextListener</listener-class
-->
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>CamelServlet</servlet-name>
<servlet-class>org.apache.camel.component.servlet.CamelHttpTransportServlet</servlet-class>
<!--init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:camel-config.xml</param-value>
</init-param -->
<load-on-startup>1</load-on-startup>
</servlet>
<!-- all our webservices are mapped under this URI pattern -->
<servlet-mapping>
<servlet-name>CamelServlet</servlet-name>
<url-pattern>/camel/*</url-pattern>
</servlet-mapping>
</web-app>
---
and the following camel-config.xml
<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";
>
<camelContext xmlns="http://camel.apache.org/schema/spring";>
<route id="helloRoute">
<!-- incoming requests from the servlet is routed -->
<from uri="servlet:CamelServlet"/>
<choice>
<when>
<!-- is there a header with the key name? -->
<header>name</header>
<!-- yes so return back a message to the user -->
<transform>
<simple>Hi I am ${sysenv.HOSTNAME}. Hello ${header.name}
how are you today?</simple>
</transform>
</when>
<otherwise>
<!-- if no name parameter then output a syntax to the user -->
<transform>
<constant>Add a name parameter to uri, eg
?name=foo</constant>
</transform>
</otherwise>
</choice>
</route>
</camelContext>
</beans>
---
Here's the pom.xml as well; I don't think it's related but of course don't know.
<project xmlns="http://maven.apache.org/POM/4.0.0";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd";>
<modelVersion>4.0.0</modelVersion>
<groupId>com.api</groupId>
<artifactId>CamelOne</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>CamelOne</name>
<properties>
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<cxf-version>2.6.1</cxf-version>
<camel-version>2.16.0</camel-version>
<spring-version>4.1.6.RELEASE</spring-version>
<!--log4j-version></log4j-version-->
</properties>
<dependencies>
<!-- Camel -->
<dependency><groupId>org.apache.camel</groupId>
<artifactId>camel-core</artifactId>
<version>${camel-version}</version> </dependency>
<dependency><groupId>org.apache.camel</groupId>
<artifactId>camel-spring</artifactId>
<version>${camel-version}</version> </dependency>
<dependency><groupId>org.apache.camel</groupId>
<artifactId>camel-servlet</artifactId>
<version>${camel-version}</version> </dependency>
<dependency><groupId>org.apache.camel</groupId>
<artifactId>camel-servletlistener</artifactId>
<version>${camel-version}</version> </dependency>
<!-- spring -->
<dependency><groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId> <version>${spring-version}</version>
</dependency>
<dependency><groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId><version>3.1.0</version>
</dependency>
<!-- logging -->
<!--dependency><groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api </artifactId>
<version>log4j-version</version> <scope>runtime</scope> </dependency-->
<!--dependency><groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core </artifactId>
<version>log4j-version</version> <scope>runtime</scope> </dependency-->
<!--dependency><groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl </artifactId>
<version>log4j-version</version> <scope>runtime</scope> </dependency-->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<compilerArguments>
<endorseddirs>${endorsed.dir}</endorseddirs>
</compilerArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.3</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<outputDirectory>${endorsed.dir}</outputDirectory>
<silent>true</silent>
<artifactItems>
<artifactItem>
<groupId>javax</groupId>
<artifactId>javaee-endorsed-api</artifactId>
<version>6.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
<!-- CXF wsdl2java generator, will plugin to the compile goal
-->
<plugin>
<groupId>org.apache.cxf</groupId>
<artifactId>cxf-codegen-plugin</artifactId>
<version>${cxf-version}</version>
<executions>
<execution>
<id>generate-sources</id>
<phase>generate-sources</phase>
<configuration>
<sourceRoot>${basedir}/target/generated-sources/cxf/</sourceRoot>
<wsdlOptions>
<wsdlOption>
<wsdl>${basedir}/src/main/webapp/WEB-INF/wsdl/report_incident.wsdl</wsdl>
</wsdlOption>
</wsdlOptions>
</configuration>
<goals>
<goal>wsdl2java</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
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