如何在JavaDSL中从Camel调用REST调用（POST和JSON主体）

在IBM WebSphere上运行的Web项目中的ServletContextListener中设置以下工作驼峰流后，传入的XML将转换为JSON并打印到System.out和report.txt。到目前为止还不错

@WebListener
public class SetupCamel implements ServletContextListener {

    private CamelContext camelContext;

@Override
    public void contextInitialized(ServletContextEvent sce) {
        System.out.println("SetupCamel:contextInitialized - enter");
        try {
            Context ctx = new InitialContext();
            QueueConnectionFactory qcf = (QueueConnectionFactory) ctx.lookup("jms/TestConnectionFactory");

            camelContext = new DefaultCamelContext();

            JmsConfiguration jmsConfiguration = new JmsConfiguration(qcf);
            JmsComponent jmsComponent = new JmsComponent(jmsConfiguration);
            camelContext.addComponent("jms", jmsComponent);

            final XmlJsonDataFormat xmlJsonFormat = new XmlJsonDataFormat();
            xmlJsonFormat.setEncoding("UTF-8");
            xmlJsonFormat.setForceTopLevelObject(false);
            xmlJsonFormat.setTrimSpaces(true);
            xmlJsonFormat.setRootName("newRoot");
            xmlJsonFormat.setSkipNamespaces(true);
            xmlJsonFormat.setRemoveNamespacePrefixes(true);

            camelContext.addRoutes(new RouteBuilder() {
                public void configure() {
                    onException(Exception.class)
                    .to("log:GeneralError?level=ERROR")
                    .end();

                    from("jms:queue:TestQueue?concurrentConsumers=1")
                    .marshal(xmlJsonFormat)
                    .to("file:/tmp/messages?fileName=report.txt&fileExist=Append")
                    .to("stream:out")
                    ;
                }
            });
            camelContext.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("SetupCamel:contextInitialized - leaving");
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        System.out.println("SetupCamel:contextDestroyed - enter");
        try {
            if (camelContext != null) {
                camelContext.stop();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("SetupCamel:contextDestroyed - leaving");
    }
}

我必须扩展流，将JSON发布到REST服务/使用者。（Rest资源已测试并工作..）

搜索（web）文档并不能为我提供一个好的/完整的JavaDSL示例。根据我的发现，我认为应该类似于添加端点，如：

.to("cxfrs://http://localhost:9080/WebContext/TestResource") 

但这不起作用，我不知道如何将转换后的JSON设置为body并将其作为POST请求。也没有例外

如何在此流中将REST调用添加为带有JSON主体的POST

运行在IBM WebSphere v8.5.5、IBM jdk 1.7x和Camel 2.11.2中

以下jar文件位于WEB-INF/lib类路径中：

camel-core-2.11.2.jar
camel-cxf-2.11.2.jar
camel-cxf-transport-2.11.2.jar
camel-jms-2.11.2.jar
camel-servletlistener-2.11.2.jar
camel-spring-2.11.2.jar
camel-stream-2.11.2.jar
camel-xmljson-2.11.2.jar
com.ibm.ws.prereq.jackson.jar
commons-beanutils-1.8.0.jar
commons-collections-3.2.1.jar
commons-lang-2.5.jar
commons-logging-1.1.1.jar
cxf-api-2.7.6.jar
cxf-rt-frontend-jaxrs-2.7.6.jar
ezmorph-1.0.6.jar
json-lib-2.4-jdk15.jar
slf4j-api-1.7.5.jar
spring-beans-3.1.4.RELEASE.jar
spring-context-3.1.4.RELEASE.jar
spring-core-3.1.4.RELEASE.jar
spring-jms-3.1.4.RELEASE.jar
spring-tx-3.1.4.RELEASE.jar
xom-1.2.5.jar

---

谢谢。

如果您只想将JSON消息发布到REST服务，您不需要使用camel cxfrs组件，因为您已经有了请求消息正文，您只需要使用camel http端点发送请求

所以路线可能是

from("jms:queue:TestQueue?concurrentConsumers=1")
                    .marshal(xmlJsonFormat)
                    .to("http://localhost:9080/WebContext/TestResource");

---

你做到了吗？

.process(new Processor() {

        @Override
        public void process(Exchange exchange) throws Exception {
            String body = (String) exchange.getIn().getBody();
            logger.info(body);
            exchange.getIn().setHeader(Exchange.HTTP_METHOD, constant(HttpMethod.POST));
            exchange.getIn().setHeader(Exchange.CONTENT_TYPE, MediaType.APPLICATION_JSON);
            exchange.getIn().setHeader("Authorization", "Bearer " + getToken());
            HttpServletRequest request = exchange.getIn().getBody(HttpServletRequest.class);
            exchange.getIn().setHeader(Exchange.HTTP_SERVLET_REQUEST, request); // POST body is set here
        }
    })
    .to(apiToCall);