決済サービスのSpring Bootのバージョンを2系に上げた話

Spring Boot
2
JSUG 2020 2
@b1a9idps

Fashion Charity Project
Triangle Sauce
React

Spring Boot 2.0.0
1. 2018 3 1
2. 2018 8 1
3. 2019 2 1

•
•
• Gradle
• Spring Cloud Config Server
• Spring Web
• Spring Data
• Spring Data JPA
• Flyway
• Testing
• Configuration Property Binding
•

※ Spring Boot 2.0.x  
1Q EOL

Coiney
• admin-api
• API
• web-api
• Web
API
• mobile-api
•
API
• partner-api
•
API
• antisocial-force-
checker
• API
• emoney-api
• API
Cloud Config

Spring Boot Gradle
coiney-api 1.5.18 3.5.1
API
admin-api, web-api, mobile-
api
coiney-api-
config-server
1.5.9 2.9 Spring Cloud Config Server
coiney-emoney 1.5.16 3.5.1 API
antisocial-
force-checker
1.4.1 3.3 API
Spring Boot 2.0.x Gradle 4+

Gradle 4.x
// build.gradle
wrapper {
gradleVersion = "4.10.2"
distributionType = Wrapper.DistributionType.ALL
}
$ ./gradlew wrapper
// Gradle 5.0
// —-warning-mode all
$ ./gradlew build —-warning-mode all

build.gradle
dependencies {
- compile "com.fasterxml.jackson.dataformat:jackson-dataformat-csv"
+ implementation "com.fasterxml.jackson.dataformat:jackson-dataformat-csv"
}
Gradle4.7 compile
4.6 4.7
compile implementation
runtime runtimeOnly
testCompile testImplementation
testRuntime testRuntimeOnly

implementation
// foo
dependencies {
implementation "com.fasterxml.jackson.dataformat:jackson-dataformat-csv"
}
// bar
dependencies {
implementation project (":foo")
}
bar jackson-dataformat-csv

•
• a-service b-service
c-service
...

• implementation api
• build.gradle
build.gradle
• Spring Boot Spring Boot
Lombok

- jar.baseName=hoge
+ archivesBaseName=hoge
Gradle5.1

Jar
// Spring Boot Gradle jar war
- bootRepackage {}
+ bootJar {}

// 60
// 0
spring.cloud.config.server.git.refresh-rate=60
Git Refresh Rate
You can control how often the config server will fetch updated configuration
data from your Git backend by using spring.cloud.config.server.git.refreshRate.
The value of this property is specified in seconds. By default the value is 0,
meaning the config server will fetch updated configuration from the Git repo
every time it is requested.
[ ]
Spring Cloud Config Server 2.0.2

@NotBlank, @NotEmpty, @Email
• 6.0.0.Final
• javax-validation
- import org.hibernate.validator.constraints.NotBlank;
+ import javax.validation.constraints.NotBlank;

Spring Boot Starter Json
• Jackson Auto-configuration
•
• jackson-databind
• jackson-datatype-jdk8
• jackson-datatype-jsr310
• jackson-module-parameter-names

WebMvcConfigurerAdapter.class
• Spring 5 Java8+ default
• WebMvcConfigurer.java
public class WebMvcConfig extends WebMvcConfigurerAdapter {}
public class WebMvcConfig implements WebMvcConfigurer {}

- import org.springframework.boot.autoconfigure.web.ErrorAttributes;
+ import org.springframework.boot.web.servlet.error.ErrorAttributes;
- import org.springframework.boot.autoconfigure.web.ErrorController;
+ import org.springframework.boot.web.servlet.error.ErrorController;
Spring Boot 2 Spring 5 Servlet Reactive

HtmlUtils.htmlEscape()
// 4.3.x
public static String htmlEscape(String input, String encoding) {
Assert.notNull(encoding, "Encoding is required");
if (input == null) {
return null;
}
// 5.0.x
public static String htmlEscape(String input, String encoding) {
Assert.notNull(input, "Input is required");
Assert.notNull(encoding, "Encoding is required");
input null Exception

DataSource
• HikariCP DataSource
url jdbc-url
// application.properties
app.datasource.jdbc-url=jdbc:mysql://localhost/test
app.datasource.username=dbuser
app.datasource.password=dbpass
app.datasource.maximum-pool-size=30
@Bean
@ConfigurationProperties(prefix = "app.datasource")
public HikariDataSource dataSource() {
return DataSourceBuilder.create().type(HikariDataSource.class).build();
}

- new PageRequest(1, 10);
+ PageRequest.of(1, 10);
- new Sort(orders);
+ Sort.by(orders);
2.2.0 public

tomcat-jdbc JdbcInterceptor
dependencies {
implementation("org.springframework.boot:spring-boot-starter-data-jpa") {
exclude group: 'com.zaxxer'
}
implementation "org.apache.tomcat:tomcat-jdbc"
}

JpaRepository.java
// Optional
- User fidyByName(String name);
+ Optional<User> findByName(String name);
//
- <S extends T> List<S> save(Iterable<S> entities);
+ <S extends T> List<S> saveAll(Iterable<S> entities);

Flyway 3 -> 5
2019-09-11 03:43:15.152 ERROR --- Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'flywayInitializer' defined in class path
resource [org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration$FlywayConfiguration.class]: Invocation of init
method failed; nested exception is org.flywaydb.core.api.FlywayException: Validate failed: Migration checksum mismatch for
migration 1
-> Applied to database : 1750005324
-> Resolved locally : -558371367
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.jav
a:1583)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:
545)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:
482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:
230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:296)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1076)
at
org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:
851)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at com.b1a9idps.sample.view.Application.main(Application.java:19)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

Flyway 3 -> 5
Important note for users upgrading from Flyway 3.x:
This release no longer supports a schema history table upgrade from Flyway
3.x. You must upgrade to Flyway 4.2.0 first before upgrading to Flyway 5.0.0.
3 -> 4
4 -> 5
Flyway
schema_version flyway_schema_history

1. Flyway 4
2.
3. Flyway 5 Boot 2.0.9.RELEASE
4.

Flyway4
dependencies {
compile "org.flywaydb:flyway-core:4.2.0"
}
$ gradle bootRun
=====
2019-09-11 03:43:14.467 INFO --- Upgrading metadata table
`sample`.`schema_version` to the Flyway 4.0 format ...
2019-09-11 03:43:15.329 INFO --- Repairing metadata for version 1
(Description: CREATE TABLE SAMPLE DATA, Checksum: -558371367) ...
(Description: MODIFY SAMPLE DATA LENGTH, Checksum: -1031537806) ...
(Description: SAMPLE DATA ADD INDEX, Checksum: 194652164) ...
2019-09-11 03:43:15.412 INFO --- Metadata table schema_version successfully
upgraded to the Flyway 4.0 format.
schema_version

Flyway5
//
spring.flyway.table=schema_version

2019-09-25 23:05:33.882 WARN --- Could not find schema history table
`sample`.`flyway_schema_history`, but found `sample`.`schema_version` instead.
You are seeing this message because Flyway changed its default for flyway.table
in version 5.0.0 to flyway_schema_history and you are still relying on the old
default (schema_version). Set flyway.table=schema_version in your configuration
to fix this. This fallback mechanism will be removed in Flyway 6.0.0.
6

JUnit
JUnit 5 Spring Boot Starter Test JUnit 4
Spring Boot 2.2.x JUnit 5
Mockito
1 2
AssertJ
2 3

- import org.mockito.runners.MockitoJUnitRunner;
+ import org.mockito.junit.MockitoJUnitRunner;
- import org.mockito.Matchers.*;
+ import org.mockito.ArgumentMatchers.*;

@ExtendWith(MockitoExtension.class)
class StubTest {
@Mock Hoge hoge;
@Test
void test() {
when(hoge.getName()).thenReturn("uchitate");
}
class Hoge {
String getName() { return "";}
}
}
Unnecessary stubbings detected.
Clean & maintainable test code requires zero unnecessary code.
Following stubbings are unnecessary (click to navigate to relevant line of code):
1. -> at com.coiney.StubTest.test(StubTest.java:18)
Please remove unnecessary stubbings or use 'lenient' strictness. More info: javadoc
for UnnecessaryStubbingException class.
org.mockito.exceptions.misusing.UnnecessaryStubbingException:
Unnecessary stubbings detected.
Clean & maintainable test code requires zero unnecessary code.
Following stubbings are unnecessary (click to navigate to relevant line of code):
1. -> at com.coiney.StubTest.test(StubTest.java:18)
Please remove unnecessary stubbings or use 'lenient' strictness. More info: javadoc
for UnnecessaryStubbingException class.

Environment
//
JsugPropsBinder binder = new JsugPropsBinder();
Binder.get(environment)
.bind("jsug.props-instance", Bindable.ofInstance(binder))
.get();
//
.bind("jsug.props-simple", Bindable.of(JsugPropsBinder.class))
.get();
// List<JsugPropsBinder>
.bind("jsug.props", Bindable.listOf(JsugPropsBinder.class))
.get();
public class JsugPropsBinder {
private List<String> speakerNames;
private String theme;
@DateTimeFormat(iso = DATE)
private LocalDate date;
}

key
Properties Yaml 1
@ConfigurationProperties prefix

Profile
jsug:
props:
list:
- name: uchitate
theme: SpringBoot2
---
spring:
profiles: dev
jsug:
props:
list:
- name: uchitate-dev
theme: SpringBoot2-dev
@ConfigurationProperties("jsug.props")
@ConstructorBinding
public class JsugProps {
private final List<Jsug> list;
public static class Jsug {
private String name;
private String theme;
}
}

Profile
// profile=default
{
"list": [
{
"name": "uchitate",
"theme": "SpringBoot2"
}
]
}
// profile=dev
{
"list": [
{
"name": "uchitate-dev",
"theme": "SpringBoot2-dev"
}
]
}

•
•
•
•
• Gradle Lombok

note
https://note.com/b1a9idps/n/n0b9ca2ee57a2

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