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I am new to REST design patterns. I am trying to write an API with following design in mind.
GET http://www.example.com/customers/33245/orders/8769/lineitems/1
I am able to write basic REST services with Java (JAX-RS) using Jersey:
GET|PUT|DELETE http://www.example.com/customers/{id}
Any tutorial that explains how we should do such multi-node routing in Java would be really helpful.
Thanks,
Kush
You should probably go with something like this (this is a snippet from the resource class):
...
#GET
#Path("customers/{customer-id}/orders/{order-id}/lineitems/{lineitem-id}")
public Response get(#PathParam("customer-id") String customerId, #PathParam("order-id") String orderId, #PathParam("lineitem-id") String lineItemId) {
// fetch logic goes here...
}
...
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In a recent interview with Amazon I have been rejected because I could not tell the advantage and disadvantage of making model and Entity classes different and same.
I have always created Model and Entity class same.
Can anybody help me on that with an example? Interviewer said you are making strong binding of UI+DB if you are keeping it same.
It's true by making same class for Entity and Model you are tightly binding UI and DB, simple example of why should avoid is -> most of the time, we modify response like adding DTO, modifying format of date and so on. which could impact your database calls (DTO layer).you can read more here
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Where I can find a reference to which all data types come under certain media types?
For example, #Consumes(MediaType.APPLICATION_FORM_URLENCODED) can consume a String or MultivaluedMap in Java.
I would like to such reference. Any help is appreciated.
I found the answer for my own question. I am just putting it out here so that in future if anyone needs to refer can refer to it :
On the following oracle webpage refer to the table mentioned in section 'Using Entity Providers to Map HTTP Response and Request Entity Bodies'
https://docs.oracle.com/cd/E19798-01/821-1841/6nmq2cp22/index.html
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In the Datastore v1Beta2 API version, DatastoreHelper was a public class, and we rely on member functions like getOptionsFromEnv(), getComputeEngineCredential(), makeFilter() and makeValue(). Looks like that class is now private in the v1 API. What's the equivalent class that will provide us access to those functions?
Most of those methods are still public in google-cloud-datastore library:
https://github.com/GoogleCloudPlatform/google-cloud-datastore/blob/master/java/datastore/src/main/java/com/google/datastore/v1/client/DatastoreHelper.java
getComputeEngineCredential() was removed, but you can use Application Default Credentials instead, which supports getting a credential from Compute Engine.
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I'm looking for a Java/Android implementation of promises that allow chaining and joining.
With chaining I mean chaining then calls so code looks like synchronous.
// Example:
getCity().then(getRestaurants).then(findBestMenu);
With joining I mean waiting for multiple promises to be fulfilled, or any of them fail.
// Example:
Promise p1 = getFlights();
Promise p2 = getHotels();
PromiseManager.when(p1,p2).then(planTrip).fail(stayAtHome);
I have found these solutions:
RxJava-Promises supports chaining via PromiseFunction and RepromiseFunction.
jdeferred supports joining via DeferredManager. EDIT: It also supports chaining via DonePipe.
EDIT2:
RxJava or RxAndroid are for reactive paradigm. A bit more complex but powerful.
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I want to compare the 2 images(images of people)and want a result that these are of same person or not(By Face recognization).I have to do this for millions of images so I cannot do it manually .Is there any api for android that can be used in my app.
You could use Camera.Face or FaceDetector.Face class. Take parameters of face on both photos and compare their parameters using e.g. eyesDistance(). If those parameters quite the same -> its the same person.