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Posted to issues@camel.apache.org by "Claus Ibsen (Jira)" <ji...@apache.org> on 2021/03/17 10:52:00 UTC
[jira] [Assigned] (CAMEL-16235) camel-servlet-starter does not
ServletComponent
[ https://issues.apache.org/jira/browse/CAMEL-16235?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Claus Ibsen reassigned CAMEL-16235:
-----------------------------------
Assignee: Claus Ibsen
> camel-servlet-starter does not ServletComponent
> -----------------------------------------------
>
> Key: CAMEL-16235
> URL: https://issues.apache.org/jira/browse/CAMEL-16235
> Project: Camel
> Issue Type: Bug
> Components: camel-servlet
> Affects Versions: 3.7.0
> Reporter: Siva Kuna
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 3.9.0
>
>
> Below is my dependency configuration in build.gradle script of my project
> {code:java}
> ext {
> versions = [
> camel : "3.5.0",
> springBoot : "2.3.0.RELEASE",
> ]
> }
> dependencies {
> compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: versions.springBoot
> compile group: 'org.apache.camel.springboot', name: 'camel-servlet-starter', version: versions.camel
> compile group: 'javax.inject', name: 'javax.inject', version: '1'
> compile group: 'org.apache.camel', name: 'camel-core', version: versions.camel
> compile group: 'org.apache.camel', name: 'camel-http', version: versions.camel
> compile group: 'org.apache.camel', name: 'camel-jackson', version: versions.camel
> compile group: 'org.apache.camel', name: 'camel-rest-openapi', version: versions.camel
> compile group: 'org.apache.camel', name: 'camel-aws2-s3', version: versions.camel
> compile group: 'org.apache.camel', name: 'camel-swagger-java', version: versions.camel
> }
> {code}
> Below is a RouteBuilder class
> {code:java}
> public class MyRouteBuilder extends RouteBuilder {
> @Override
> public void configure() throws Exception {
> this.restConfiguration().bindingMode(RestBindingMode.json)
> .clientRequestValidation(true).apiProperty("api.title", "MyAPI")
> .apiProperty("api.version", "1.0").apiProperty("cors", "true")
> .apiContextPath("api-doc");
> }
> }{code}
>
> When I start the Spring Boot application the camel-servlet-starter starts the ServletComponent and I can access the api-doc URL. But the same code fails when I upgrade the Camel version to 3.7.0.
> This is what I discovered when I tried to understand why camel-servlet-starter starts in 3.5.0 and fails in 3.7.0
> Below is the definition of Servlet Component Bean in org.apache.camel.component.servlet.springboot.ServletComponentAutoConfiguration class of camel-servlet-starter-3.5.x
> {code:java}
> @Lazy
> @Bean(name = "servlet-component")
> @ConditionalOnMissingBean(ServletComponent.class)
> public ServletComponent configureServletComponent() throws Exception {
> ServletComponent component = new ServletComponent();
> component.setCamelContext(camelContext);
> }{code}
> When Spring starts Camel routes, it asks RestApiEndpoint to create REST API Consumer and Spring initializes the Servlet Component by invoking ServletComponentAutoConfiguration.configureServletComponent().
> This is changed in camel-servlet-starter-3.7.x
> {code:java}
> @Lazy
> @Bean
> public ComponentCustomizer configureServletComponent() {
> return new ComponentCustomizer() {
> @Override
> public void configure(String name, Component target) {
> CamelPropertiesHelper.copyProperties(camelContext, configuration, target);
> }
> @Override
> public boolean isEnabled(String name, Component target) {
> return HierarchicalPropertiesEvaluator.evaluate(applicationContext,
> "camel.component.customizer",
> "camel.component.servlet.customizer")
> && target instanceof ServletComponent; }
> };
> }{code}
> Spring fails to start CamelContext with the below exception stack trace:
> {noformat}
> org.apache.camel.FailedToStartRouteException: Failed to start route route1 because of null
> at org.apache.camel.impl.engine.RouteService.warmUp(RouteService.java:122) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.InternalRouteStartupManager.doWarmUpRoutes(InternalRouteStartupManager.java:270) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.InternalRouteStartupManager.safelyStartRouteServices(InternalRouteStartupManager.java:157) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.InternalRouteStartupManager.doStartOrResumeRoutes(InternalRouteStartupManager.java:115) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.AbstractCamelContext.doStartCamel(AbstractCamelContext.java:2889) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.AbstractCamelContext.doStartContext(AbstractCamelContext.java:2702) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.AbstractCamelContext.doStart(AbstractCamelContext.java:2665) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.spring.boot.SpringBootCamelContext.doStart(SpringBootCamelContext.java:43) ~[camel-spring-boot-3.7.0.jar:3.7.0]
> at org.apache.camel.support.service.BaseService.start(BaseService.java:115) ~[camel-api-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.AbstractCamelContext.start(AbstractCamelContext.java:2431) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.spring.SpringCamelContext.start(SpringCamelContext.java:130) ~[camel-spring-3.7.0.jar:3.7.0]
> at org.apache.camel.spring.SpringCamelContext.onApplicationEvent(SpringCamelContext.java:167) ~[camel-spring-3.7.0.jar:3.7.0]
> at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:203) ~[spring-context-5.3.1.jar:5.3.1]
> at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:196) ~[spring-context-5.3.1.jar:5.3.1]
> at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:161) ~[spring-context-5.3.1.jar:5.3.1]
> at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:426) ~[spring-context-5.3.1.jar:5.3.1]
> at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383) ~[spring-context-5.3.1.jar:5.3.1]
> at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:945) ~[spring-context-5.3.1.jar:5.3.1]
> at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:591) ~[spring-context-5.3.1.jar:5.3.1]
> at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.0.jar:2.4.0]
> at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.0.jar:2.4.0]
> at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.0.jar:2.4.0]
> at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.0.jar:2.4.0]
> at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.0.jar:2.4.0]
> at com.guidewire.surepath.document.management.box.DocumentManagementBoxApplication.main(DocumentManagementBoxApplication.java:16) ~[main/:na]
> Caused by: java.lang.IllegalStateException: Cannot find RestApiConsumerFactory in Registry or as a Component to use
> at org.apache.camel.component.rest.RestApiEndpoint.createConsumer(RestApiEndpoint.java:278) ~[camel-rest-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.DefaultRoute.addServices(DefaultRoute.java:575) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.DefaultRoute.onStartingServices(DefaultRoute.java:160) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.RouteService.doWarmUp(RouteService.java:150) ~[camel-base-engine-3.7.0.jar:3.7.0]
> at org.apache.camel.impl.engine.RouteService.warmUp(RouteService.java:120) ~[camel-base-engine-3.7.0.jar:3.7.0]{noformat}
> Spring starts CamelContext successfully if I register the servlet component in the RouteBuilder class
> Below is a RouteBuilder class
> {code:java}
> public class MyRouteBuilder extends RouteBuilder {
> @Override
> public void configure() throws Exception {
> this.restConfiguration().bindingMode(RestBindingMode.json)
> .clientRequestValidation(true).apiProperty("api.title", "MyAPI")
> .apiProperty("api.version", "1.0").apiProperty("cors", "true")
> .component("servlet")
> .apiContextPath("api-doc");
> }
> }{code}
>
> Are developers mandated to register ServletComponent in the RouteBuilder class?
>
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