Re: Examples of Cayenne Tapestry apps

Forwarding to list.

On 13/5/21 17:03, Andrus Adamchik wrote:
> Ah sorry, missed this piece. I have the services declared in the
> Bootique module via provider methods, and there's also a "shared
> context supplier" service, that is a wrapper against ObjectContext
> singleton (appropriate for read-only work of course; writable contexts
> should not be shared). See below.
>
> Andrus
> ------
> @Provides @Singleton SharedContextSupplier provideCayenneContextSupplier(ServerRuntime runtime) {
>     return new DefaultSharedContextSupplier(runtime.newContext());
> }
> @Singleton @Provides private ObjectIdCoder provideIdCoder(IdCoder idCoder) {
>     return new ObjectIdCoder(idCoder);
> }
>
> @Singleton @Provides private PersistentCoder providePersistentCoder(IdCoder idCoder, SharedContextSupplier contextSupplier) {
>     return new PersistentCoder(idCoder, contextSupplier);
> }
>
> @Singleton @Provides private IdCoder provideIdCoder(ServerRuntime serverRuntime) {
>     return new IdCoder(serverRuntime.getDataDomain().getEntityResolver());
> }
> public interface SharedContextSupplier extends Supplier<ObjectContext> {
>     ObjectContext get();
> }
> public class DefaultSharedContextSupplier implements
> SharedContextSupplier {
>
>     private ObjectContext sharedContext;
>
>     public DefaultSharedContextSupplier(ObjectContext sharedContext) {
>         this.sharedContext = sharedContext;
>     }
>
>     @Override public ObjectContext get() {
>         return sharedContext;
>     }
> }
>
>
>
>> On May 13, 2021, at 9:56 AM, D Tim Cummings <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Thanks Andrus. I am trying to use encoders like you have done. I put
>> the method contributeValueEncoderSource in my AppModule.java.
>>
>> 1. Is Supplier from java.util.function.Supplier (re: your class
>> PersistentCoder)?
>>
>> 2. Do I need to add the following to bind in AppModule.java? (If not
>> I got 'No service implements the interface').
>>
>>   public static void bind(ServiceBinder binder) {
>>     // ...
>>     binder.bind(PersistentCoder.class, PersistentCoder.class);
>>     binder.bind(ObjectIdCoder.class, ObjectIdCoder.class);
>>     binder.bind(IdCoder.class, IdCoder.class);
>>     binder.bind(EntityResolver.class, EntityResolver.class);
>>   }
>>  
>> 3. I am now getting an error
>>
>> No service implements the interface java.util.function.Supplier
>>
>> Thanks
>> Tim
>>
>> On 12/5/21 21:57, Andrus Adamchik wrote:
>>>> On May 12, 2021, at 1:50 PM, D Tim Cummings wrote:
>>>>
>>>> Does anyone know of any good open-source Cayenne Tapestry apps that show
>>>> best practice and latest features for using these two frameworks
>>>> together? Most of the Tapestry examples use Hibernate.
>>>>
>>>> Tim
>>> Hi Tim,
>>>
>>> Not aware of any other than this ancient one [1] (I see your commits in there :)) . Also you probably know that Bootique supports Tapestry [2], and that's what we are on. As for the Tapestry part, we are using vanilla Tapestry functionality for the most part. Looking at my own (non-open source) Tapestry modules [3,4], the only Cayenne extension is encoders for Persistent and ObjectId [5], so that objects can be encoded/decoded to/from page URL parameters. So our entire integration can fit in an email message, and that's the beauty of it :)
>>>  
>>> Andrus
>>>
>>> -----
>>>
>>> [1] https://github.com/andrus/wowodc13
>>> [2] https://github.com/bootique/bootique-tapestry
>>> [3] Bootique config:
>>>
>>> TapestryModule.extend(binder).addTapestryModule(TapestryModule.class)
>>>     // this ensures that T5 JS/CSS only includes when the page or components explicitly import parts of
>>>     // the stack
>>>     .setSymbol(SymbolConstants.INCLUDE_CORE_STACK, "false")
>>>     // turn off Tapestry Bootstrap .. we don't have much choice in the matter of the root selection
>>>     // it has to be one of the standard T5 locations. "META-INF/asset" is the most neutral one..
>>>     .setSymbol(SymbolConstants.BOOTSTRAP_ROOT, "classpath:/META-INF/assets")
>>>     .setSymbol(SymbolConstants.OMIT_GENERATOR_META, "true");
>>>
>>> [4] Tapestry module loaded via Bootique:
>>>
>>> public class TapestryModule {
>>>
>>>     public void contributeValueEncoderSource(
>>>             MappedConfiguration<Class, ValueEncoderFactory> configuration,
>>>             PersistentCoder persistentCoder, 
>>>             ObjectIdCoder objectIdCoder) {
>>>
>>>         configuration.add(Persistent.class, c -> persistentCoder);
>>>         configuration.add(ObjectId.class, c -> objectIdCoder);
>>>     }
>>> }
>>>
>>> [5] ID coders 
>>>
>>> import org.apache.cayenne.ObjectId;
>>> import org.apache.cayenne.lifecycle.id.IdCoder;
>>> import org.apache.tapestry5.ValueEncoder;
>>>
>>> public class ObjectIdCoder implements ValueEncoder<ObjectId> {
>>>
>>>     private IdCoder idCoder;
>>>
>>>     public ObjectIdCoder(IdCoder idCoder) {
>>>         this.idCoder = idCoder;
>>>     }
>>>
>>>     @Override
>>>     public String toClient(ObjectId value) {
>>>         return idCoder.getStringId(value);
>>>     }
>>>
>>>     @Override
>>>     public ObjectId toValue(String clientValue) {
>>>         return idCoder.getObjectId(clientValue);
>>>     }
>>> }
>>>
>>> import org.apache.cayenne.Cayenne;
>>> import org.apache.cayenne.ObjectContext;
>>> import org.apache.cayenne.Persistent;
>>> import org.apache.cayenne.lifecycle.id.IdCoder;
>>> import org.apache.tapestry5.ValueEncoder;
>>>
>>> public class PersistentCoder implements ValueEncoder<Persistent> {
>>>
>>>     private IdCoder idCoder;
>>>     private Supplier<ObjectContext> contextSupplier;
>>>
>>>     public PersistentCoder(IdCoder idCoder, Supplier<ObjectContext> contextSupplier) {
>>>         this.idCoder = idCoder;
>>>         this.contextSupplier = contextSupplier;
>>>     }
>>>
>>>     @Override
>>>     public String toClient(Persistent value) {
>>>         return idCoder.getStringId(value);
>>>     }
>>>
>>>     @Override
>>>     public Persistent toValue(String clientValue) {
>>>
>>>         // TODO: should we be using ObjectIdQuery with caching?
>>>
>>>         return (Persistent) Cayenne.objectForPK(
>>>                 contextSupplier.get(),
>>>                 idCoder.getObjectId(clientValue));
>>>     }
>>> }
>>>
>>>
>>>
>>>
>>
>
-- 
Triptera Pty Ltd
D Tim Cummings
0418778422
[email protected]