Hi, I just want to share our (somewhat painful) migration experiences here. I think it could be useful for the other people as there seems to be a lack of documentation about migration. It's mostly the other technologies dropwizard depends on and some of them are rather obvious and normal to not mention.
Jackson: - In order to ignore certain fields, we were using *AnnotationIntrospector *feature by overriding "*hasIgnoreMarker*" method. That stopped working for some reason. Having not able to find the cause, and not wanting to spend too much time, we have decided to use *FilterProvider *feature instead. - No need for extra java8 modules anymore. They are already included. - Jackson has a new feature which treats @ *javax.beans.ConstructorProperties* as *@JsonCreator *( https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.7). We use lombok, and have a lot of *@AllArgsConstructor*s for the json objects. Turns out, this annotation also adds @*javax.beans.ConstructorProperties *to the constructor. This makes Jackson to use that constructor instead of the empty one. This leads to setting nulls to non-existing fields even though we have *JsonInclude.Include.NON_ABSENT*. Thus, our default values were ignored. I've decided to fix this by creating a lombok.config file and adding ' lombok.anyConstructor.suppressConstructorProperties = true' to it. I've found another solution, but I didn't know what might be the side effect as it may be overriding the existing introspector: objectMapper.setAnnotationIntrospector(new JacksonAnnotationIntrospector(). setConstructorPropertiesImpliesCreator(false)); Validation: - No more *OptionalValidatedValueUnwrapper* needed. - As *@Validated* used to be enough previously, we didn't follow the documentation and just kept *@Validated* on the parameters. This is not enough anymore, both *@Valid* and *@Validated* is required to have validation, if you need grouping. https://github.com/dropwizard/dropwizard/pull/1251#issuecomment-142645734 - We have our own *ConstraintViolationException *mapper to be able to provide custom error objects which includes a "field" field which gives the field path. *c**onstraintViolation.getPropertyPath() *used to return the direct path of the field, like *childObject[1].field*. And *constraintViolation.getRootBeanClass() *used to return the json object. We do some reflection and annotation processing in order to get the *@JsonProperty("fieldName") *correctly on this json object. Now *propertyPath* is something like *post.args1.childObject[1].field* and *rootBeanClass* is the resource class. This needed considerable changes in order to continue to work as before. - *@ValidationMethod *is now called even when when the regular validation fails.* B*efore, if, say, *@NotNull* fails, validation methods were not evaluated. So we didn't have '*if(null) return true' *in those methods before. With dropwizard 1.0.0 they started throwing null pointer exception and returning 500. Adding null checks fixed it of course. Logging: - We were using a 3rd party code that overrides "*AbstractAppenderFactory*". The signature has changed and broke the compatibility. We've done the necessary changes. Configuration: - In order to have a HTTPs server with a self-signed certificate, one needed to have *validateCerts: false* in the configuration yaml. Now this isn't enough. Now one also needs *validatePeers: false*. - Jersey client gets 'Connection Reset' errors. Explained here: https://groups.google.com/forum/#!topic/dropwizard-user/gEwrTwRZez0. I've made it work with enabling *retries *on the configuration but would prefer to understand why it's failing in the first place. Which doesn't work out of box. You also need *chunkedEncodingEnabled: false *for it to work*.* - https://github.com/tkrille/dropwizard-environment-config <https://github.com/tkrille/dropwizard-environment-config>is not compatible anymore. We have moved to https://github.com/tkrille/dropwizard-template-config. Which was already recommended apparently but we haven't been following the repository. Feel free to add more of your experiences here so this can become some sort of documentation. Also corrections are obviously welcome. Natan -- You received this message because you are subscribed to the Google Groups "dropwizard-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
