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219 строки
7.6 KiB
Plaintext
219 строки
7.6 KiB
Plaintext
https://projects.spring.io/spring-framework/
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-java
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https://docs.spring.io/spring-boot/docs/2.0.0.M7/reference/htmlsingle/#boot-features-developing-auto-configuration
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http://www.baeldung.com/spring-boot-migration
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Profile;
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import org.springframework.stereotype.Component;
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import org.springframework.stereotype.Service;
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@Conditional
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-java-conditional
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@ConditionalOnClass
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@ConditionalOnProperty
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@ConditionalOnMissingBean
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@ConditionalOnExpression("""
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${p1.enabled:false}
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or
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${p2.enabled:false}
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""")
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https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc#web-environment
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Web Environment:
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A SpringApplication attempts to create the right type of ApplicationContext on your behalf. By default, an AnnotationConfigApplicationContext or
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AnnotationConfigServletWebServerApplicationContext is used, depending on whether you are developing a web application or not.
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https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot-tools/spring-boot-loader/src/it/executable-props-lib/src/main/java/org/springframework/boot/launcher/it/props/EmbeddedJarStarter.java
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cheat-sheets:
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https://zeroturnaround.com/rebellabs/spring-framework-annotations-cheat-sheet/
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http://files.zeroturnaround.com/pdf/zt_spring_annotations_cheat_sheet.pdf
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public final class EmbeddedJarStarter {
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public static void main(String[] args) throws Exception {
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AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(SpringConfiguration.class);
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context.getBean(SpringConfiguration.class).run(args);
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context.close();
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}
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}
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-//-/SpringConfiguration.java
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@Configuration
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@ComponentScan
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public class SpringConfiguration implements InitializingBean {
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private String message = "Jar";
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@Override
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public void afterPropertiesSet() throws IOException {
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Properties props = new Properties();
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props.load(new ClassPathResource("application.properties").getInputStream());
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String value = props.getProperty("message");
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if (value!=null) {
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this.message = value;
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}
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}
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public void run(String... args) {
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System.err.println("Hello Embedded " + this.message + "!");
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}
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}
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@Configuration
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@ComponentScan('com.clarabridge.services')
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class WebConfiguration {
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@Bean
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@Autowired
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public ForeignClass beanName(Service service) {
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return new ForeignClass(service);
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}
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}
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-postconstruct-and-predestroy-annotations
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CommonAnnotationBeanPostProcessor
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import javax.annotation.PostConstruct;
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@Configuration ??? @Component
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Exporter {
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@PostConstruct
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public void doPC() {
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}
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@PreDestroy
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}
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@Autowired, @Inject, @Resource, and @Value annotations are handled by Spring BeanPostProcessor implementations
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which in turn means that you cannot apply these annotations within your own BeanPostProcessor or BeanFactoryPostProcessor types (if any).
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These types must be 'wired up' explicitly via XML or using a Spring @Bean method.
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import org.springframework.beans.factory.annotation.Value;
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...
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@Value("${lang.id:en}")
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private String langId;
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...
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lookup-method (impl will be generated by cglib):
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public abstract class CommandManager {
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public Object process(Object commandState) {
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Command command = createCommand();
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command.setState(commandState);
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return command.execute();
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}
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@Lookup("myCommand")
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protected abstract Command createCommand();
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}
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?MethodReplacer
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scopes:
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org.springframework.web.context.annotation
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@ApplicationScope
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@RequestScope
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@SessionScope
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-java-specifying-bean-scope
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@Scope("prototype")
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proxyMod (ScopedProxyMode.NO, TARGET_CLASS, INTERFACES)
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multiple-wiring-by-type-beans (primary="true")
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@Bean @Primary
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classpath scanning
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-classpath-scanning
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stereotype annotations
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@Component
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@Service
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@Controller
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@Repository
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@RestController
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component scanning
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-scanning-filters
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@ComponentScan(
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includeFilters = @Filter(type = FilterType.REGEX, pattern = "..."),
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excludeFilters = ...,
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useDefaultFilters = false
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)
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types
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annotation(default)
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assignable
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aspectj
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regex
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custom
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bean-metadata within components
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-factorybeans-annotations
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@Bean
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@Qualifier
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@Scope
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@Lazy
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name auto-generation
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-scanning-name-generator
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@Service("myMovieLister")
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public class SimpleMovieLister {...}
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@Configuration
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@ComponentScan(basePackages = "org.example", nameGenerator = MyNameGen.class) // MyNameGen impls BeanNameGenerator
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custom scope resolver
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-scanning-scope-resolver
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@Configuration
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@ComponentScan(basePackages = "org.example", scopeResolver = MyScopeRes.class) // MyScopeRes impls ScopeMetadataResolver
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generate an index of candidate components
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-scanning-index
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org.springframework.spring-context-indexer
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will generate
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META-INF/spring.components
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instantiation
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AnnotationConfigApplicationContext
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-java-instantiating-container
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AnnotationConfigWebApplicationContext
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-java-instantiating-container-web
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!!! can be driven by @ComponentScan
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@Bean(initMethod="...",
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destroyMethod="..." // close() and shutdown() methods are auto-called !!!
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destroyMethod="" // to disable this auto-callling behavior
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)
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@Bean(name="...",
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name={"alias1", "alias2", ...},
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description="...")
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@Import(ConfigA.class)
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-java-composing-configuration-classes
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@Profile({"p1", "!p2"})
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-definition-profiles
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-definition-profiles-xml
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@Profile("default")
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public class DefaultDataConfig {...}
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@PropertySource
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#beans-property-source-abstraction
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https://docs.spring.io/spring/docs/current/spring-framework-reference/core.html#propertysource
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The @PropertySource annotation provides a convenient and declarative mechanism for adding a PropertySource to Spring<6E>s Environment.
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@Configuration
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@PropertySource("classpath:/com/myco/app.properties")
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public class AppConfig {
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@Autowired
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Environment env;
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@Bean
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public TestBean testBean() {
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TestBean testBean = new TestBean();
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testBean.setName(env.getProperty("testbean.name"));
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return testBean;
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}
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}
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