डेटा कैशिंग - जावा स्प्रिंग

• वसंत में कैश
• Oracle PL-SQL फ़ंक्शन में कैश

वसंत में कैश

@SpringBootApplication @EnableCaching public class DemoCacheAbleApplication { public static void main(String[] args) { SpringApplication.run(DemoCacheAbleApplication.class, args); } } 

  @Cacheable(cacheNames="person") public Person findCacheByName(String name) { //... } 

 @Component public class PersonRepository { private static final Logger logger = LoggerFactory.getLogger(PersonRepository.class); private List<Person> persons = new ArrayList<>(); public void initPersons(List<Person> persons) { this.persons.addAll(persons); } private Person findByName(String name) { Person person = persons.stream() .filter(p -> p.getName().equals(name)) .findFirst() .orElse(null); return person; } @Cacheable(cacheNames="person") public Person findCacheByName(String name) { logger.info("find person ... " + name); final Person person = findByName(name); return person; } } 

 @RunWith(SpringRunner.class) @SpringBootTest public class DemoCacheAbleApplicationTests { private static final Logger logger = LoggerFactory.getLogger(DemoCacheAbleApplicationTests.class); @Autowired private PersonRepository personRepository; @Before public void before() { personRepository.initPersons(Arrays.asList(new Person("", 22), new Person("", 34), new Person("", 41))); } private Person findCacheByName(String name) { logger.info("begin find " + name); final Person person = personRepository.findCacheByName(name); logger.info("find result = " + person.toString()); return person; } @Test public void findByName() { findCacheByName(""); findCacheByName(""); } } 

 @Test public void findByName() { findCacheByName(""); findCacheByName(""); } 

  @Cacheable(cacheNames="person", key="#name") public Person findByKeyField(String name, Integer age) { 

  public boolean delete(String name) { final Person person = findByName(name); return persons.remove(person); } public boolean add(Person person) { return persons.add(person); } 

  @CachePut(cacheNames="person") public Person findByNameAndPut(String name) { logger.info("findByName and put person ... " + name); final Person person = findByName(name); logger.info("put in cache person " + person); return person; } 

  @Test public void findCacheByNameAndPut() { Person person = findCacheByName(""); logger.info("delete " + person); personRepository.delete(""); findCacheByName(""); logger.info("add new person"); person = new Person("", 35); personRepository.add(person); findCacheByName(""); logger.info("put new"); personRepository.findByNameAndPut(""); findCacheByName(""); } 

 @SpringBootApplication @EnableCaching public class DemoCacheAbleApplication { public static void main(String[] args) { SpringApplication.run(DemoCacheAbleApplication.class, args); } @Bean public CacheManager cacheManager() { SimpleCacheManager cacheManager = new SimpleCacheManager(); cacheManager.setCaches(Arrays.asList( new ConcurrentMapCache("person"), new ConcurrentMapCache("addresses"))); return cacheManager; } } 

 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cache="http://www.springframework.org/schema/cache" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd"> <cache:annotation-driven/> <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager"> <property name="caches"> <set> <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" name="person"/> <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" name="addresses"/> </set> </property> </bean> </beans> 

 public class Person { private String name; private Integer age; public Person(String name, Integer age) { this.name = name; this.age = age; } public String getName() { return name; } public Integer getAge() { return age; } @Override public String toString() { return name + ":" + age; } 

 <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>demoCacheAble</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>DemoCacheAble</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-cache</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 

Oracle PL-SQL फ़ंक्शन में कैश

RESULT_CACHE

 CREATE OR REPLACE FUNCTION GET_COUNTRY_NAME(P_CODE IN VARCHAR2) RETURN VARCHAR2 RESULT_CACHE IS CODE_RESULT VARCHAR2(50); BEGIN SELECT COUNTRY_NAME INTO CODE_RESULT FROM COUNTRIES WHERE COUNTRY_ID = P_CODE; --    dbms_lock.sleep (1); RETURN(CODE_RESULT); END; 

RELIES_ON (...)