SalithaUCSC

package com.api.reporting.services;

import java.util.List;
import java.util.Optional;

import com.api.reporting.exceptions.ProductNotFoundException;
import com.api.reporting.models.Product;
import com.api.reporting.respositories.ProductRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

SalithaUCSC

public interface ProductService {

    Product getProductById(long productId);
}

SalithaUCSC

package com.api.reporting.controllers;

import com.api.reporting.models.Product;
import com.api.reporting.services.ProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.List;

SalithaUCSC

package com.api.reporting.respositories;

import com.api.reporting.models.Product;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;

import java.util.List;
import java.util.Optional;

SalithaUCSC

import com.api.reporting.models.Product;

import java.util.List;
import java.util.Optional;

public interface ProductRepositoryCustom {
    Optional<List<Product>> findByName(String name);
}

SalithaUCSC

package com.api.reporting.models;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "products")
public class Product {

    @Id
    private long id;

SalithaUCSC

import com.api.reporting.models.Product;
import org.springframework.data.mongodb.repository.MongoRepository;


public interface ProductRepository extends MongoRepository<Product, Long> {

}

SalithaUCSC

import com.api.reporting.models.Product;
import org.springframework.data.mongodb.repository.MongoRepository;


public interface ProductRepository extends MongoRepository<Product, Long>, ProductRepositoryCustom {

}

SalithaUCSC

import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;

public class LambdaDemo {
    public static void main(String[] args) {
        // CREATE SEPARATE CONSUMER TO MAKE STRINGS UPPERCASE
        List<String> names = Arrays.asList("Sam", "Bob", "Sim");
        // APPLY LAMBDA

SalithaUCSC

import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Predicate;
import java.util.stream.Collectors;

class Person {
    private String name;
    private int age;