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Posted to dev@camel.apache.org by "Willem Jiang (JIRA)" <ji...@apache.org> on 2009/05/20 06:59:50 UTC
[jira] Resolved: (CAMEL-1628) Restlet component fails with NPE if
used in combination with dynamic recipients (recipientList())
[ https://issues.apache.org/activemq/browse/CAMEL-1628?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Willem Jiang resolved CAMEL-1628.
---------------------------------
Resolution: Won't Fix
This issue is fixed in the CAMEL-1516.
Please check out the latest released Camel 1.6.1 or coming out Camel 2.0-m2 for verifcation.
> Restlet component fails with NPE if used in combination with dynamic recipients (recipientList())
> -------------------------------------------------------------------------------------------------
>
> Key: CAMEL-1628
> URL: https://issues.apache.org/activemq/browse/CAMEL-1628
> Project: Apache Camel
> Issue Type: Bug
> Affects Versions: 2.0-M1
> Environment: WinXP SP3, Java 5 (suspect not relevant to this problem)
> Restlet 1.1.1 (suspect not relevant to this problem)
> Reporter: Dan Haywood
> Assignee: Willem Jiang
>
> see also: http://www.nabble.com/How-extract-message-body-and-use-later-on-in-route-for-endpoint--td23612034.html
> I've got:
> private static final String HOST_URI = "http://localhost:7070";
> from("direct:getEmployee")
> .to("restlet:" + HOST_URI + "/services")
> .process(new Processor() {
> public void process(Exchange exchange) throws Exception {
> String resourcePath = ... xpath to obtain the resource path from exchange.getIn().getBody()
> message.setBody(resourcePath);
> exchange.setOut(message);
> }
> }).recipientList(new ExpressionAdapter(){
> public Object evaluate(Exchange exchange) {
> return "restlet:" + HOST_URI + exchange.getIn().getBody();
> }
> });
> The first restlet call succeeds, returning an XHTML entity. The processor then extracts a resource from an <a href>
> The ExpressionAdapter dynamically constructs a new Uri to invoke via Restlet. However, this second restlet call fails, with a nullpointerexception. It seems that the org.restlet.Restlet is instantiated with the default constructor. For the first successful call the Restlet#init() method is called, so its context is setup correctly. But for the second restlet call #init() doesn't seem to get called.
> This ultimately triggers the NPE in com.neolios.restlet.http.HttpConverter#addAdditionalHeaders, trying to get a Logger from this context object, but it is passed in from RestletComponent which I imagine wraps the Restlet.
> My guess is that it is the dynamic creation of the recipientList is what's ultimately responsible for this failure to call #init()?
> This is Camel 2.0-M1 against Restlet 1.1.1.
> ----
> Some stacktraces:
> 1. first time through:
> Component(Restlet).setContext(Context) line: 228
> ComponentHelper.<init>(Component) line: 64
> Engine.createHelper(Component) line: 380
> Engine.createHelper(Component) line: 105
> Component.<init>() line: 177
> RestletComponent.<init>() line: 46
> NativeConstructorAccessorImpl.newInstance0(Constructor, Object[]) line: not available [native method]
> NativeConstructorAccessorImpl.newInstance(Object[]) line: 39
> DelegatingConstructorAccessorImpl.newInstance(Object[]) line: 27
> Constructor<T>.newInstance(Object...) line: 494
> Class<T>.newInstance0() line: 350 [local variables unavailable]
> Class<T>.newInstance() line: 303 [local variables unavailable]
> ObjectHelper.newInstance(Class<T>) line: 797
> ReflectionInjector.newInstance(Class<T>) line: 32
> DefaultComponentResolver.resolveComponent(String, CamelContext) line: 72
> DefaultCamelContext.getComponent(String) line: 201
> DefaultCamelContext.getEndpoint(String) line: 354
> CamelContextHelper.getMandatoryEndpoint(CamelContext, String) line: 52
> RouteDefinition.resolveEndpoint(String) line: 133
> DefaultRouteContext.resolveEndpoint(String) line: 103
> DefaultRouteContext.resolveEndpoint(String, String) line: 109
> ToDefinition(SendDefinition<Type>).resolveEndpoint(RouteContext) line: 57
> ToDefinition(SendDefinition<Type>).createProcessor(RouteContext) line: 51
> -vs-
> 2. second time through, is constructed, but no setContext was called:
> Client(Restlet).<init>(Context) line: 79
> Client(Connector).<init>(Context, List<Protocol>) line: 83
> Client.<init>(Context, List<Protocol>, String) line: 82
> Client.<init>(Context, Protocol) line: 101
> Client.<init>(Protocol) line: 121
> Client.<init>(String) line: 131
> RestletProducer.<init>(RestletEndpoint) line: 38
> RestletEndpoint.createProducer() line: 73
> ProducerCache.getProducer(Endpoint) line: 52
> RecipientList.sendToRecipientList(Exchange, Object) line: 74
> RecipientList.process(Exchange) line: 62
> InstrumentationProcessor.process(Exchange, AsyncCallback) line: 80
> StreamCachingInterceptor.proceed(Exchange, AsyncCallback) line: 88
> StreamCachingInterceptor.process(Exchange, AsyncCallback) line: 83
> DeadLetterChannel.process(Exchange, AsyncCallback, DeadLetterChannel$RedeliveryData) line: 195
> DeadLetterChannel.process(Exchange, AsyncCallback) line: 130
> Pipeline.process(Exchange, Exchange, AsyncCallback, Iterator<Processor>, AsyncProcessor) line: 115
> Pipeline.process(Exchange, AsyncCallback) line: 89
> InstrumentationProcessor.process(Exchange, AsyncCallback) line: 68
> StreamCachingInterceptor.proceed(Exchange, AsyncCallback) line: 88
> StreamCachingInterceptor.process(Exchange, AsyncCallback) line: 83
> UnitOfWorkProcessor.process(Exchange, AsyncCallback) line: 52
> AsyncProcessorHelper.process(AsyncProcessor, Exchange) line: 41
> UnitOfWorkProcessor(DelegateAsyncProcessor).process(Exchange) line: 65
> DirectProducer.process(Exchange) line: 47
> ProducerCache.sendExchange(Endpoint, Producer, Processor, Exchange) line: 151
> ProducerCache.send(Endpoint, ExchangePattern, Processor) line: 136
> DefaultProducerTemplate.send(Endpoint, ExchangePattern, Processor) line: 99
> DefaultProducerTemplate.sendBody(Endpoint, ExchangePattern, Object) line: 103
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