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From "Luca Burgazzoli (JIRA)" <>
Subject [jira] [Commented] (CAMEL-10542) DataFormat from registry is used for every dataformat operation (marshal/unmarshal)
Date Thu, 01 Dec 2016 17:13:58 GMT


Luca Burgazzoli commented on CAMEL-10542:

Maybe a better way would be:

- if a ref is set, look it up and use it as it is
- if ref is not set, search for a DataFormatFactory instead of DataFormat
- if factory is not found go ahead with standard resolution

So that spring-boot or any other container can safely register its factory as i.e. csv-factory
or csv-dataformat-factory

> DataFormat from registry is used for every dataformat operation (marshal/unmarshal)
> -----------------------------------------------------------------------------------
>                 Key: CAMEL-10542
>                 URL:
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-core
>            Reporter: Luca Burgazzoli
>            Assignee: Luca Burgazzoli
>             Fix For: 2.18.2, 2.19.0
> While working on an issue related to spring-boot I found out that if a data format is
registered in camel registry with the same name as the one camel looks-up with the help of
DefaultDataFormatResolver, this object is then re-configured for each data format definition
so one definition may override previous configuration with an undefined behavior.
> So assume you have an xml route definitions as:
> {code:xml}
> <routes xmlns="">
>   <route>
>     <from uri="direct:unmarshal"/>
>     <unmarshal>
>       <csv delimiter=";" headerDisabled="true"/>
>     </unmarshal>
>   </route>
>   <route>
>     <from uri="direct:marshal"/>
>     <marshal>
>       <csv headerDisabled="true" quoteDisabled="true"/>
>     </marshal>
>   </route>
> </routes>
> {code}
> And some code like:
> {code:java}
> InputStream is = getClass().getResourceAsStream("...");
> SimpleRegistry reg = new SimpleRegistry();
> reg.put("csv-dataformat", new CsvDataFormat());
> DefaultCamelContext ctx = new DefaultCamelContext(reg);
> ctx.addRouteDefinitions(ctx.loadRoutesDefinition(is).getRoutes());
> ctx.start();
> ProducerTemplate template = ctx.createProducerTemplate();
> String result = template.requestBody(
>     "direct:marshal",
>     Arrays.asList(Arrays.asList( "A1", "B1", "C1" )),
>     String.class);
> assertEquals("A1,B1,C1", result);
> ctx.stop
> {code}
> Then this test fails with:
> {code}
> Expected :A1,B1,C1
> Actual   :A1;B1;C1
> {code}
> It fails because the object added to the SimpleRegistry is shared among the two csv dataformats
 so it is configured to have delimiter = ';' 
> For spring-boot this causes some issues as it registers data formats beans as part of
its auto-configuration magic thus if you do not set your own instance of data format, any
data format operation like marshal/unmarshal may not work as expected. 
> - for spring-boot a solution would be to annotate auto configured data format beans with
prototype scope.
> - a more generic solution would be to make DataFormat Cloneable and clone the bean found
in the registry

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