feat: 메일 템플릿 의존성 추가 및 설정

batch-common/src/main/java/kr/seok/common/mail/EmailService.java

@@ -0,0 +1,5 @@
+package kr.seok.common.mail;
+
+public interface EmailService {
+    void sendSimpleMessage(String subject, String template, String... to);
+}

batch-common/src/main/java/kr/seok/common/mail/EmailServiceImpl.java

@@ -0,0 +1,42 @@
+package kr.seok.common.mail;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.mail.MailException;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.mail.javamail.MimeMessagePreparator;
+import org.springframework.stereotype.Component;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class EmailServiceImpl implements EmailService {
+
+    public static final String ENCODING_UTF8 = "UTF-8";
+    private final JavaMailSender javaMailSender;
+
+    @Value(value = "${spring.mail.username}")
+    private String from;
+
+    public void sendSimpleMessage(String subject, String template, String... to) {
+        MimeMessagePreparator mimeMessagePreparator = makeMassage(subject, template, to);
+        try {
+            javaMailSender.send(mimeMessagePreparator);
+            log.info("[LOG] [SEND] EXECUTE");
+        } catch(MailException e) {
+            log.debug("[LOG] [MailException] : {}", e.getMessage());
+        }
+    }
+
+    private MimeMessagePreparator makeMassage(final String subject, final String template, final String[] to) {
+        return mimeMessage -> {
+            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, false, ENCODING_UTF8);
+            mimeMessageHelper.setSubject(subject);
+            mimeMessageHelper.setFrom(from);
+            mimeMessageHelper.setText(template, true);
+            mimeMessageHelper.setTo(to);
+        };
+    }
+}

batch-mail-service/src/main/java/com/example/mail/config/ThymeleafConfig.java

@@ -0,0 +1,35 @@
+package com.example.mail.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.spring5.SpringTemplateEngine;
+import org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver;
+import org.thymeleaf.templatemode.TemplateMode;
+
+@Configuration
+public class ThymeleafConfig {
+
+    private static final String CHARACTER_ENCODING_UTF8 = "UTF-8";
+    public static final String PREFIX_LOCATION = "classpath:templates/";
+    public static final String SUFFIX_HTML = ".html";
+
+    @Bean
+    public TemplateEngine htmlTemplateEngine() {
+        TemplateEngine templateEngine = new SpringTemplateEngine();
+        templateEngine.addTemplateResolver(springResourceTemplateResolver());
+        return templateEngine;
+    }
+
+    @Bean
+    public SpringResourceTemplateResolver springResourceTemplateResolver() {
+        SpringResourceTemplateResolver resolver = new SpringResourceTemplateResolver();
+        resolver.setOrder(1);
+        resolver.setPrefix(PREFIX_LOCATION);
+        resolver.setSuffix(SUFFIX_HTML);
+        resolver.setTemplateMode(TemplateMode.HTML);
+        resolver.setCharacterEncoding(CHARACTER_ENCODING_UTF8);
+        resolver.setCacheable(false);
+        return resolver;
+    }
+}

batch-mail-service/src/main/java/com/example/mail/job/MailJobConfiguration.java

@@ -0,0 +1,75 @@
+package com.example.mail.job;
+
+
+import com.example.mail.template.MailTemplateBuilder;
+import kr.seok.common.mail.EmailService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.batch.core.Job;
+import org.springframework.batch.core.Step;
+import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
+import org.springframework.batch.core.configuration.annotation.JobScope;
+import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
+import org.springframework.batch.core.launch.support.RunIdIncrementer;
+import org.springframework.batch.item.database.JpaPagingItemReader;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Slf4j
+@Configuration
+@RequiredArgsConstructor
+public class MailJobConfiguration {
+
+    private static final String JOB_NAME = "mailJob";
+    public static final int CHUNK_SIZE = 1000;
+
+    private final JobBuilderFactory jobBuilderFactory;
+    private final StepBuilderFactory stepBuilderFactory;
+
+    private final EmailService emailService;
+    private final MailTemplateBuilder mailTemplateBuilder;
+
+    @Bean(value = JOB_NAME)
+    public Job mailJob() {
+        log.info("[LOG] [JOB] [START] {}", JOB_NAME);
+        return jobBuilderFactory.get(JOB_NAME)
+                .incrementer(new RunIdIncrementer())
+                .start(dataReader())
+                .build();
+    }
+
+    @Bean
+    @JobScope
+    public Step dataReader() {
+        log.info("[LOG] [STEP] [START] {}", "mailStep");
+        return stepBuilderFactory.get("mailStep")
+                .chunk(CHUNK_SIZE)
+//                .reader(mybatisReader())
+//                .writer(mailSender())
+                .build();
+    }
+//
+//    @Bean
+//    public JpaPagingItemReader<?> mybatisReader() {
+//        log.info("[LOG] [READER] [START] {}", "mybatisReader");
+//        String queryId = "com.example.jobs.mapper.UserMapper.findAllData";
+//        return new MyBatisCursorItemReaderBuilder<>()
+//                .sqlSessionFactory(sqlSessionFactory)
+//                .queryId(queryId)
+//                .build();
+//    }
+//
+//    public ItemWriter<? super User> mailSender() {
+//        log.info("[LOG] [WRITER] [START] {}", "mailSender");
+//        return items -> {
+//            String[] toRecipients = items.stream()
+//                    .map(User::getEmail)
+//                    .toArray(String[]::new);
+//            String subject = "제목";
+//            String templateName = "mail_template";
+//            String template = mailTemplateBuilder.makeTemplate(templateName, items);
+//            emailService.sendSimpleMessage(subject, template, toRecipients);
+//            log.info("[LOG] [WRITER] [END] : SEND");
+//        };
+//    }
+}

batch-mail-service/src/main/java/com/example/mail/template/MailTemplateBuilder.java

@@ -0,0 +1,24 @@
+package com.example.mail.template;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.context.Context;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+
+@Component
+@RequiredArgsConstructor
+public class MailTemplateBuilder {
+
+    public static final String TEMPLATE_PATH = "mail/";
+    private final TemplateEngine templateEngine;
+
+    public String makeTemplate(String templateName, List<? extends Map<String, Object>> users) {
+        Context context = new Context(Locale.getDefault());
+        context.setVariable("list", users);
+        return templateEngine.process(TEMPLATE_PATH + templateName, context);
+    }
+}

build.gradle

@@ -51,13 +51,10 @@ subprojects {
         implementation "org.springframework.boot:spring-boot-starter-data-jpa"
         implementation "javax.validation:validation-api"
 
+        // 컴파일 단계에서 이미 롬복의 기능을 제공받고, 런타임 단계에서는 해당 라이브러리가 필요하지 않기 때문에 Compile Only로 설정
         compileOnly 'org.projectlombok:lombok'
         annotationProcessor 'org.projectlombok:lombok'
 
-        /* Excel*/
-        implementation "org.apache.poi:poi:5.1.0"          // .xlsx
-        implementation "org.apache.poi:poi-ooxml:5.1.0"    // .xls
-
         runtimeOnly 'com.h2database:h2'
         runtimeOnly 'mysql:mysql-connector-java'
 
@@ -108,6 +105,12 @@ configure(querydslProjects) {
 }
 
 project(":batch-common") {
+    dependencies {
+        implementation "org.apache.poi:poi:5.1.0"          // .xlsx
+        implementation "org.apache.poi:poi-ooxml:5.1.0"    // .xls
+
+        implementation 'org.springframework.boot:spring-boot-starter-mail'
+    }
     /* DTO, Util 클래스 등등 */
     bootJar { enabled = false }
     jar { enabled = true }
@@ -139,16 +142,16 @@ project(":batch-admin") {
 project(":batch-hospital") {
     dependencies {
         implementation project(":batch-common")
-        implementation 'org.apache.httpcomponents:httpclient:4.5.13'
-        /* https://mvnrepository.com/artifact/org.modelmapper.extensions/modelmapper-spring */
-        implementation 'org.modelmapper.extensions:modelmapper-spring:1.1.0'
-
-        implementation 'org.springframework.boot:spring-boot-starter-data-elasticsearch'
-
-        // es 의존성 추가시 배치가 끝나지 않는 문제 발생
-        implementation 'org.elasticsearch:elasticsearch:7.6.2'
-        implementation 'org.elasticsearch.client:elasticsearch-rest-client:7.6.2'
-        implementation 'org.elasticsearch.client:elasticsearch-rest-high-level-client:7.6.2'
+//        implementation 'org.apache.httpcomponents:httpclient:4.5.13'
+//        /* https://mvnrepository.com/artifact/org.modelmapper.extensions/modelmapper-spring */
+//        implementation 'org.modelmapper.extensions:modelmapper-spring:1.1.0'
+//
+//        implementation 'org.springframework.boot:spring-boot-starter-data-elasticsearch'
+//
+//        // es 의존성 추가시 배치가 끝나지 않는 문제 발생
+//        implementation 'org.elasticsearch:elasticsearch:7.6.2'
+//        implementation 'org.elasticsearch.client:elasticsearch-rest-client:7.6.2'
+//        implementation 'org.elasticsearch.client:elasticsearch-rest-high-level-client:7.6.2'
     }
 }
 
@@ -175,18 +178,22 @@ project(":batch-library-jpa") {
         implementation project(":batch-common")
     }
 }
+
 project(":batch-library-test") {
     dependencies {
         implementation project(":batch-common")
     }
 }
+
 project(":batch-real-estate") {
     dependencies {
         implementation project(":batch-common")
     }
 }
+
 project(":batch-mail-service") {
     dependencies {
         implementation project(":batch-common")
+        implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
     }
 }