Examples of org.jclouds.rest.functions.ImplicitOptionalConverter

org.jclouds.rest.functions.ImplicitOptionalConverter
When a client marked @Delegate is optional, the implementation of this is responsible for creating the optional object. For example.
```
 interface MyCloud { @Delegate Optional<KeyPairClient> getKeyPairExtensionForRegion(String region); } 
```
The input object of type {@link InvocationSuccess} will include thefollowing.
1. the class declaring the method that returns optional: {@link InvocationSuccess#getClazz}; in the example above, {@code MyCloud}
2. the method returning the optional: {@link InvocationSuccess#getMethod}; in the example above, {@code getKeyPairExtensionForRegion}
3. the args passed to that method at runtime: {@link InvocationSuccess#getArgs}; for example {@code North}
4. the rest client to be enclosed in the optional, should you choose to return it: {@link InvocationSuccess#getReturnVal}; in the example above, an implementation of {@code KeyPairClient}
Using this context, your implementation of {@link ImplicitOptionalConverter}can perform whatever you need, when deciding if the the returnVal is present and available. Here are some ideas:
- call a smoke test command
- look at the annotations on the class and compare those against a configuration switch enabling the extension
- inspect the health of the client, perhaps looking for error status
- call another api which can validate the feature can be presented
The {@link PresentWhenApiVersionLexicographicallyAtOrAfterSinceApiVersion default implementation} returns present if no {@link SinceApiVersion}annotation is assigned, or the value is less than or equal to the current {@link ApiVersion}. To override this, add the following in your subclass override of {@link RestClientModule#configure} method:
```
 bind(ImplicitOptionalConverter.class).to(MyCustomOptionalConverter.class); 
```
@author Adrian Cole


      }, new AbstractModule() {


         @Override
         protected void configure() {
            bind(ImplicitOptionalConverter.class).toInstance(new ImplicitOptionalConverter() {


               @Override
               public Optional<Object> apply(InvocationSuccess input) {
                  return Optional.absent();
               }

View Full Code Here


      }, new AbstractModule() {


         @Override
         protected void configure() {
            bind(ImplicitOptionalConverter.class).toInstance(new ImplicitOptionalConverter() {


               @Override
               public Optional<Object> apply(InvocationSuccess input) {
                  return Optional.absent();
               }

View Full Code Here


      }, new AbstractModule() {


         @Override
         protected void configure() {
            bind(ImplicitOptionalConverter.class).toInstance(new ImplicitOptionalConverter() {


               @Override
               public Optional<Object> apply(InvocationSuccess input) {
                  return Optional.absent();
               }

View Full Code Here


      }, new AbstractModule() {


         @Override
         protected void configure() {
            bind(ImplicitOptionalConverter.class).toInstance(new ImplicitOptionalConverter() {


               @Override
               public Optional<Object> apply(InvocationSuccess input) {
                  return Optional.absent();
               }

View Full Code Here


      }, new AbstractModule() {


         @Override
         protected void configure() {
            bind(ImplicitOptionalConverter.class).toInstance(new ImplicitOptionalConverter() {


               @Override
               public Optional<Object> apply(InvocationSuccess input) {
                  return Optional.absent();
               }

View Full Code Here

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Related Classes of org.jclouds.rest.functions.ImplicitOptionalConverter

org.jclouds.rest.internal.RestAnnotationProcessorTest

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