Salesforceの認証を行う

AuthenticationResult.java

package com.github.apz.salesforcesample.model;

import com.fasterxml.jackson.databind.PropertyNamingStrategies;
import com.fasterxml.jackson.databind.annotation.JsonNaming;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import lombok.ToString;

@NoArgsConstructor @Getter @Setter @ToString
@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)   // 認証結果のレスポンスはSnakeCase
public class AuthenticationResult {
    int statusCode;
    String accessToken;
    String signature;
    String instanceUrl;
    String id;
    String tokenType;
    String issuedAt;

    public String bearerToken() {
        return "Bearer " + accessToken;
    }
}

SalesforceAuthentication.java

package com.github.apz.salesforcesample.repository;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.github.apz.salesforcesample.config.SalesforceProperties;
import com.github.apz.salesforcesample.model.AuthenticationResult;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.WebClient;

@Component
@AllArgsConstructor
@Slf4j
public class SalesforceAuthentication {
    SalesforceProperties salesforceProperties;
    WebClient salesforceAuthWebClient;

    public AuthenticationResult authentication() {
        AuthenticationResult authenticationResult = salesforceAuthWebClient.post()
                .contentType(MediaType.APPLICATION_FORM_URLENCODED)
                .body(BodyInserters.fromFormData(authenticationCode()))
                .retrieve()
                .bodyToMono(AuthenticationResult.class)
                .block();

        log.info("result: {}", authenticationResult.toString());

        return authenticationResult;
    }

    MultiValueMap<String, String> authenticationCode() {
        return new LinkedMultiValueMap<>() {{
            add("grant_type", salesforceProperties.getGrantType());
            add("client_id", salesforceProperties.getConsumerKey());
            add("client_secret", salesforceProperties.getConsumerSecret());
            add("username", salesforceProperties.getMailAddress());
            add("password", salesforceProperties.getPassword() + salesforceProperties.getSecurityToken());
        }};
    }
}