Raouf25

public class ClientUnavailableException extends BackendException {
    public ClientUnavailableException(String message) {
        super(ErrorEnum.CLIENT_UNAVAILABLE_ERROR, "%s is unavailable", message);
    }
}

Raouf25

import lombok.Getter;
import lombok.RequiredArgsConstructor;
import org.springframework.http.HttpStatus;

@Getter
@RequiredArgsConstructor
public enum ErrorEnum {
    CLIENT_UNAVAILABLE_ERROR("Service unavailable.", HttpStatus.BAD_REQUEST),
    RESOURCE_NOT_FOUND("Resource not found.", HttpStatus.NOT_FOUND);
    private final String message;

Raouf25

public class ResourceNotFoundException extends BackendException {
    public ResourceNotFoundException(Integer id, String message) {
        super(ErrorEnum.RESOURCE_NOT_FOUND, "%s id = %s not found", message, id);
    }
}

Raouf25

import lombok.Getter;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;

import java.util.Arrays;
import java.util.List;

@Getter
@Setter
@Slf4j

Raouf25

<dependency>
    <groupId>com.pivovarit</groupId>
    <artifactId>throwing-function</artifactId>
    <version>1.5.0</version>
</dependency>

Raouf25

package com.mak.springbootefficientsearchapi.configuration;

import net.kaczmarzyk.spring.data.jpa.web.SpecificationArgumentResolver;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.List;

Raouf25

<dependency>
	<groupId>net.kaczmarzyk</groupId>
	<artifactId>specification-arg-resolver</artifactId>
	<version>2.1.1</version>
</dependency>

Raouf25

    /**
     * get element using Criteria.
     *
     * @param spec    *
     * @param headers pagination data
     * @param sort    sort criteria
     * @return retrieve elements with pagination
     */
    public PagingResponse get(Specification<Car> spec, HttpHeaders headers, Sort sort) {
        if (isRequestPaged(headers)) {

Raouf25

@Transactional
@GetMapping(value = "", produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseStatus(HttpStatus.OK)
public ResponseEntity<List<Car>> get(
        @And({
                @Spec(path = "manufacturer", params = "manufacturer", spec = Like.class),
                @Spec(path = "model", params = "model", spec = Like.class),
                @Spec(path = "country", params = "country", spec = In.class),
                @Spec(path = "type", params = "type", spec = Like.class),
                @Spec(path = "createDate", params = "createDate", spec = Equal.class),

Raouf25

package com.mak.springbootefficientsearchapi.entity;

import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;