Hi Martin, =20 Thanks for looking into this! =20 1) Yes, Errai supports client-side request interceptors that can be = used to manipulate the request in any way you want (i.e. for caching or = security purposes): = http://docs.jboss.org/errai/3.0.3.Final/errai/reference/html_single/#sid-1= 9398997_ErraiJAX-RS-ClientsideInterceptors. However, the content-type =
=20 2) By default, Errai comes with its own marshalling system and = customized JSON format. It supports heterogenous collections, immutable = types, back references and much more which required adding additional =
--Apple-Mail=_12774FE9-5503-4BA2-8215-8D69C7B462D7 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Hi, Just a quick follow-up on 2.) As it happens, I just received a pull request for the first part of this = (allow to plug in a simple custom JAX-RS marshaller). Yay, open source! = ;)=20 You can track the progress here: https://issues.jboss.org/browse/ERRAI-796 This will allow you to rename fields using Jackson annotations.=20 Cheers, Christian On Nov 19, 2014, at 12:01 PM, Christian Sadilek <csadilek@redhat.com> = wrote: header should really be controlled (and is automatically set) based on = the @Consumes annotation. Of course you can override it, if required. framework-specific information to the payload (i.e. type information, = object ids, etc.). In Errai JAX-RS you can also use standard Jackson = based JSON which all JAX-RS implementations support. Errai does support = customer marshallers too ( = http://docs.jboss.org/errai/3.0.3.Final/errai/reference/html_single/#sid-5= 931328_Marshalling-CustomMarshallers) but this feature is not aligned = with our Jackson support. We can talk about this more but it looks like = I=92ll have to add a feature for you here if that=92s a blocking = requirement?
=20 Cheers, Christian =20 On Nov 19, 2014, at 10:58 AM, Martin Betak <mbetak@redhat.com> wrote: =20
Hi all, =20 I've been exploring the possibilities of utilizing Errai JAX-RS for = REST client in=20 our current GWT-based frontend. This would be a complement to = Vojtech's oVirt.js library which is very native to javascript and utilizes dynamic discovery of = resources and actions. =20 Errai JAX-RS would enable us to reuse our restapi definitions of = resource interfaces and entities=20 and generate proxies automatically thus eliminating the need for = extensive manual code generation. =20 [errai jax-rs] = https://docs.jboss.org/author/display/ERRAI/Errai+JAX-RS =20 Unfortunately in my quest I stumbled upon some issues I couldn't = exactly google or solve=20 and I would like to ask Mark or Christian, whether the below is = somehow possible with Errai: =20 1) Adding custom header to every request (some form of request = interceptors) You, see our api returns by default XML and we of course want to = consume JSON. Thus adding 'Content-Type: application/json' as well as other custom = authentication headers is necessary for our usage. =20 2) Using custom JSONProvider/ObjectMapper instead of the default = Jackson one.=20 In our JSONProvider [1] we use custom ObjectMapper [2] mainly to map = JAX-B annotations to json. Without this for example errai generates marshaller for the = VMs resource =20 public class VMs { @XmlElement(name =3D "vm") protected List<VM> vMs; } =20 that expects json field called "vMs" instead of the JAX-B = specification "vm" which is the actual format returned from the API. There may be other differencies such as = [3] so I think the best solution would be if we could tell errai to use specific JSONProvider for = generating the marshallers. =20 This are the issues that so far seem to be the most blocking ones, = others may arise along the way. =20 Thank you for any help provided. =20 Best regards, =20 Martin =20 [1] = https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/modules/= restapi/interface/definition/src/main/java/org/ovirt/engine/api/json/JSONP= rovider.java [2] = https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/modules/= restapi/interface/definition/src/main/java/org/ovirt/engine/api/json/Custo= mObjectMapper.java [3] = https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/modules/= restapi/interface/definition/src/main/java/org/ovirt/engine/api/json/Custo= mBeanFactory.java [resource schema] = https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/modules/= restapi/interface/definition/src/main/resources/api.xsd =20
--Apple-Mail=_12774FE9-5503-4BA2-8215-8D69C7B462D7 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html = charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; -webkit-line-break: = after-white-space;">Hi,<div><br></div><div>Just a quick follow-up on = 2.)</div><div><br></div><div>As it happens, I just received a pull = request for the first part of this (allow to plug in a simple custom = JAX-RS marshaller). Yay, open source! = ;) </div><div><br></div><div>You can track the progress = here:</div><div><a = href=3D"https://issues.jboss.org/browse/ERRAI-796">https://issues.jboss.or= g/browse/ERRAI-796</a></div><div><br></div><div>This will allow you to = rename fields using Jackson = annotations. </div><div><br></div><div>Cheers,</div><div>Christian</d= iv><div><br><div><div>On Nov 19, 2014, at 12:01 PM, Christian Sadilek = <<a href=3D"mailto:csadilek@redhat.com">csadilek@redhat.com</a>> = wrote:</div><br class=3D"Apple-interchange-newline"><blockquote = type=3D"cite"><meta http-equiv=3D"Content-Type" content=3D"text/html = charset=3Dwindows-1252"><div style=3D"word-wrap: break-word; = -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi = Martin,<div><br></div><div>Thanks for looking into = this!<br><div><div><br></div><div>1) Yes, Errai supports client-side = request interceptors that can be used to manipulate the request in any = way you want (i.e. for caching or security purposes): <a = href=3D"http://docs.jboss.org/errai/3.0.3.Final/errai/reference/html_singl= e/#sid-19398997_ErraiJAX-RS-ClientsideInterceptors">http://docs.jboss.org/= errai/3.0.3.Final/errai/reference/html_single/#sid-19398997_ErraiJAX-RS-Cl= ientsideInterceptors</a>. However, the content-type header should really = be controlled (and is automatically set) based on the @Consumes = annotation. Of course you can override it, if = required.</div><div><br></div><div>2) By default, Errai comes with its = own marshalling system and customized JSON format. It supports = heterogenous collections, immutable types, back references and much more = which required adding additional framework-specific information to the = payload (i.e. type information, object ids, etc.). In Errai JAX-RS you = can also use standard Jackson based JSON which all JAX-RS = implementations support. Errai does support customer marshallers too = ( <a = href=3D"http://docs.jboss.org/errai/3.0.3.Final/errai/reference/html_singl= e/#sid-5931328_Marshalling-CustomMarshallers">http://docs.jboss.org/errai/= 3.0.3.Final/errai/reference/html_single/#sid-5931328_Marshalling-CustomMar= shallers</a>) but this feature is not aligned with our Jackson support. = We can talk about this more but it looks like I=92ll have to add a = feature for you here if that=92s a blocking = requirement?</div><div><br></div><div>Cheers,</div><div>Christian</div><di= v><br></div><div><div><div>On Nov 19, 2014, at 10:58 AM, Martin Betak = <<a href=3D"mailto:mbetak@redhat.com">mbetak@redhat.com</a>> = wrote:</div><br class=3D"Apple-interchange-newline"><blockquote = type=3D"cite">Hi all,<br><br>I've been exploring the possibilities of = utilizing Errai JAX-RS for REST client in <br>our current GWT-based = frontend. This would be a complement to Vojtech's oVirt.js = library<br>which is very native to javascript and utilizes dynamic = discovery of resources and actions.<br><br>Errai JAX-RS would enable us = to reuse our restapi definitions of resource interfaces and entities = <br>and generate proxies automatically thus eliminating the need for = extensive manual<br>code generation.<br><br>[errai jax-rs] <a = href=3D"https://docs.jboss.org/author/display/ERRAI/Errai+JAX-RS">https://= docs.jboss.org/author/display/ERRAI/Errai+JAX-RS</a><br><br>Unfortunately = in my quest I stumbled upon some issues I couldn't exactly google or = solve <br>and I would like to ask Mark or Christian, whether the below = is somehow possible with Errai:<br><br>1) Adding custom header to every = request (some form of request interceptors)<br>You, see our api returns = by default XML and we of course want to consume JSON.<br>Thus adding = 'Content-Type: application/json' as well as other custom authentication = headers<br>is necessary for our usage.<br><br>2) Using custom = JSONProvider/ObjectMapper instead of the default Jackson one. <br>In our = JSONProvider [1] we use custom ObjectMapper [2] mainly to map JAX-B = annotations<br>to json. Without this for example errai generates = marshaller for the VMs resource<br><br>public class VMs {<br> = @XmlElement(name =3D "vm")<br> = protected List<VM> vMs;<br>}<br><br>that expects = json field called "vMs" instead of the JAX-B specification "vm" which is = the actual<br>format returned from the API. There may be other = differencies such as [3] so I think the best solution<br>would be if we = could tell errai to use specific JSONProvider for generating the = marshallers.<br><br>This are the issues that so far seem to be the most = blocking ones, others may arise along the way.<br><br>Thank you for any = help provided.<br><br>Best regards,<br><br>Martin<br><br>[1] <a = href=3D"https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/= modules/restapi/interface/definition/src/main/java/org/ovirt/engine/api/js= on/JSONProvider.java">https://github.com/oVirt/ovirt-engine/blob/master/ba= ckend/manager/modules/restapi/interface/definition/src/main/java/org/ovirt= /engine/api/json/JSONProvider.java</a><br>[2] <a = href=3D"https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/= modules/restapi/interface/definition/src/main/java/org/ovirt/engine/api/js= on/CustomObjectMapper.java">https://github.com/oVirt/ovirt-engine/blob/mas= ter/backend/manager/modules/restapi/interface/definition/src/main/java/org= /ovirt/engine/api/json/CustomObjectMapper.java</a><br>[3] <a = href=3D"https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/= modules/restapi/interface/definition/src/main/java/org/ovirt/engine/api/js= on/CustomBeanFactory.java">https://github.com/oVirt/ovirt-engine/blob/mast= er/backend/manager/modules/restapi/interface/definition/src/main/java/org/= ovirt/engine/api/json/CustomBeanFactory.java</a><br>[resource schema] <a = href=3D"https://github.com/oVirt/ovirt-engine/blob/master/backend/manager/= modules/restapi/interface/definition/src/main/resources/api.xsd">https://g= ithub.com/oVirt/ovirt-engine/blob/master/backend/manager/modules/restapi/i= nterface/definition/src/main/resources/api.xsd</a><br></blockquote></div><= br></div></div></div></div></blockquote></div><br></div></body></html>= --Apple-Mail=_12774FE9-5503-4BA2-8215-8D69C7B462D7--