RestDemo | RESTful Web Service Demos with Jersey Hibernate Mysql | Object-Relational Mapping library

I bought this new book to try to learn Spring Boot quickly. It started out well, and I easily created a REST API. But then we added CrudRepository, and I'm seeing issues with the code as described in the book. Also, there is no code available to download because the author took it down from Oreily's git repo in order to fix some things...

The issue is that if I try to build the code as the book describes (without a default constructor) I get a Java error complaining that there is no default constructor. If I add a default constructor, it builds, but Spring uses it instead of the new constructor, that requires a parameter to be passed. So when I actually call the API, like if I call the /coffees endpoint, I get a java.lang.NullPointerException: null

So how is Spring supposed to know which constructor to use, and how could it pass in values for this parameter?

Here is the controller:

Class :

How could I find a specific id in this list?

I was having a problem with setting up a spring demo project and did not easily find a solution online. Below lays out the details and I found a way to make it work (I'll add as an answer) for me and maybe it'll help someone else.

I am following the guide for building REST services with spring: https://spring.io/guides/tutorials/bookmarks/

In the guide, it says to go to https://start.spring.io/ and select the following: Web, JPA, H2, and Lombok.

I downloaded, upnzipped, and imported it into my Spring Tool Suite in Eclipse. Right away it can be seen that the project has issues so I right-click the project -> Maven -> Update Project... This did not resolve so next I did was:

Right-click project -> Run As -> Maven install

This results with BUILD FAILURE:

Failed to execute goal on project restDemo: Could not resolve dependencies for project com.example:restDemo:jar:0.0.1-SNAPSHOT: Failed to collect dependencies at org.springframework.boot:spring-boot-starter-web:jar:2.1.1.RELEASE -> org.hibernate.validator:hibernate-validator:jar:6.0.13.Final: Failed to read artifact descriptor for org.hibernate.validator:hibernate-validator:jar:6.0.13.Final: Could not transfer artifact org.jboss.shrinkwrap:shrinkwrap-bom:pom:1.2.3 from/to central (https://repo.maven.apache.org/maven2): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target -> [Help 1]

I am behind a corporate firewall and I figured it had something to do with not being able to get all the dependencies.

If I authenticate to D365 via the web browser, and then enter the following URL:

https://mytenantcode.crmserver.dynamics.com/api/data/v8.2/systemusers?$select=systemuserid,lastname,firstname,title&$top=3

I can get back the top 3 records with the data I requested.

I seem to be able to authenticate to D365 in code as per my other question (which I answered), and have an access token but I cannot seem to be able to determine how to setup the TRESTRequest object so that the Execute works.

Currently, it always returns a 401 Unauthorized error.

I've tried setting the TOAuth2Authenticator.AccessToken property to the token I received from D365, and then set the TRESTClient.Authenticator property to the TOAuth2Authenticator and the TRESTQuest.Client to the TRESTClient, which is how the examples work in the RESTDemos project, but I still get 401.

This is the last example of the code I tried, that should have worked, given that all the REST objects are linked correctly:

I have implemented Struts2 REST API from getting info from here

Struts2 Rest Plugin

Is there any way to return custom response in in restful plugin in Struts2. I did all the required changes like

I am using Cucumber testing framing with spring-rest web service. I am using standard cucumber JUnit framework and Gradle build tool.

Here are the dependencies

i'm trying to extract data from a json file located and put it in an array. Currently i'm getting these errors:

I'm looking at this code which implements a simple JSON server using casablanca. I have not found a better example so far. The author seems to use a different HTTP method for each API which could become a problem when the server is supposed to many APIs. How should this problem be solved ? Would it mean that I would need multiple http_listeners ?