ehcache 自定义序列化

ゝ一纸荒年。 2023-01-21 12:24 246阅读 0赞

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### ehcache 自定义序列化 ###

**序列化：**ehcache可在**on-heap（jvm内存）、off-heap（系统内存）、disk、clustered store**上存储，除在**on-heap上可以直接存储对象或者对象的引用**外，**在其余地方存储需要对对象进行序列化**

**默认提供的序列化类**

![20210516095545614.png][]

## ##

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**相关类与接口**

**Serializer**

public interface Serializer<T> {
    
        ByteBuffer serialize(T var1) throws SerializerException;
        T read(ByteBuffer var1) throws ClassNotFoundException, SerializerException;
    
        boolean equals(T var1, ByteBuffer var2) throws ClassNotFoundException, SerializerException;
    }

**IntegerSerializer：默认的整数序列化类**

public class IntegerSerializer implements Serializer<Integer> {
        public IntegerSerializer() {
        }
    
        public IntegerSerializer(ClassLoader classLoader) {
        }
    
        public ByteBuffer serialize(Integer object) {
            ByteBuffer byteBuffer = ByteBuffer.allocate(4);
            byteBuffer.putInt(object).flip();
            return byteBuffer;
        }
    
        public Integer read(ByteBuffer binary) {
            return binary.getInt();
        }
    
        public boolean equals(Integer object, ByteBuffer binary) {
            return object.equals(this.read(binary));
        }
    }

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**示例**

**序列化类**

public class PersonSerializer implements Serializer<Person> {
    
        public PersonSerializer(){
    
        }
    
        public PersonSerializer(ClassLoader classLoader){
    
        }
    
        @Override
        public ByteBuffer serialize(Person person) throws SerializerException {
            return ByteBuffer.wrap(JSONObject.toJSONBytes(person));
        }
    
        @Override
        public Person read(ByteBuffer byteBuffer) throws ClassNotFoundException, SerializerException {
            return JSONObject.parseObject(byteBuffer.array(),Person.class);
        }
    
        @Override
        public boolean equals(Person person, ByteBuffer byteBuffer) throws ClassNotFoundException, SerializerException {
            return person.equals(JSONObject.parseObject(byteBuffer.array(),Person.class));
        }
    }

**注意：****序列化类需要public修饰、且需含有classLoader构造函数**

@Data
    class Person{
    
        private String name;
        private Integer age;
    }
    
    public class Test {
    
        public static void main(String[] args){
            CacheManager cacheManager= CacheManagerBuilder.newCacheManagerBuilder()
                    .with(CacheManagerBuilder.persistence("d:"+File.separator+"cache"))
                    .withSerializer(Person.class,PersonSerializer.class)
                    .withCache("custom", CacheConfigurationBuilder
                            .newCacheConfigurationBuilder(String.class,Person.class,
                            ResourcePoolsBuilder.newResourcePoolsBuilder()
                            .heap(10, MemoryUnit.MB)
                            .disk(100,MemoryUnit.MB)
                            .build()
                    )).build(true);
    
            Person person=new Person();
            person.setName("瓜田李下");
            person.setAge(20);
    
            Cache<String,Person> cache=cacheManager.getCache("custom",String.class,Person.class);
            cache.put("1",person);
            System.out.println(cache.get("1"));
    
            //cacheManager.close();
        }

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**控制台输出**

"C:\Program Files\Java\jdk-15\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2020.1.3\lib\idea_rt.jar=50959:C:\Program Files\JetBrains\IntelliJ IDEA 2020.1.3\bin" -Dfile.encoding=UTF-8 -classpath "E:\java\IdeaProjects\springboot ehcache test\target\classes;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot-starter-web\2.4.5\spring-boot-starter-web-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot-starter\2.4.5\spring-boot-starter-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot\2.4.5\spring-boot-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot-autoconfigure\2.4.5\spring-boot-autoconfigure-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot-starter-logging\2.4.5\spring-boot-starter-logging-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\apache\logging\log4j\log4j-to-slf4j\2.13.3\log4j-to-slf4j-2.13.3.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\apache\logging\log4j\log4j-api\2.13.3\log4j-api-2.13.3.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\slf4j\jul-to-slf4j\1.7.30\jul-to-slf4j-1.7.30.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\yaml\snakeyaml\1.27\snakeyaml-1.27.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot-starter-json\2.4.5\spring-boot-starter-json-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\com\fasterxml\jackson\core\jackson-databind\2.11.4\jackson-databind-2.11.4.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\com\fasterxml\jackson\core\jackson-annotations\2.11.4\jackson-annotations-2.11.4.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\com\fasterxml\jackson\core\jackson-core\2.11.4\jackson-core-2.11.4.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.11.4\jackson-datatype-jdk8-2.11.4.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.11.4\jackson-datatype-jsr310-2.11.4.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.11.4\jackson-module-parameter-names-2.11.4.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot-starter-tomcat\2.4.5\spring-boot-starter-tomcat-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\apache\tomcat\embed\tomcat-embed-core\9.0.45\tomcat-embed-core-9.0.45.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\glassfish\jakarta.el\3.0.3\jakarta.el-3.0.3.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\apache\tomcat\embed\tomcat-embed-websocket\9.0.45\tomcat-embed-websocket-9.0.45.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-web\5.3.6\spring-web-5.3.6.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-beans\5.3.6\spring-beans-5.3.6.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-webmvc\5.3.6\spring-webmvc-5.3.6.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-aop\5.3.6\spring-aop-5.3.6.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-context\5.3.6\spring-context-5.3.6.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-expression\5.3.6\spring-expression-5.3.6.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\boot\spring-boot-configuration-processor\2.4.5\spring-boot-configuration-processor-2.4.5.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\projectlombok\lombok\1.18.20\lombok-1.18.20.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\ehcache\ehcache\3.9.3\ehcache-3.9.3.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\slf4j\slf4j-api\1.7.30\slf4j-api-1.7.30.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\com\alibaba\fastjson\1.2.76\fastjson-1.2.76.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-core\5.3.6\spring-core-5.3.6.jar;E:\Program Files\apache-maven-3.6.1-bin\apache-maven-3.6.1\repository\org\springframework\spring-jcl\5.3.6\spring-jcl-5.3.6.jar" com.example.demo.test.Test
    11:42:36.942 [main] DEBUG org.ehcache.core.spi.ServiceLocator - Starting 20 Services...
    11:42:36.957 [main] DEBUG org.ehcache.impl.persistence.DefaultLocalPersistenceService - RootDirectory Locked
    11:42:36.973 [main] DEBUG org.ehcache.core.internal.statistics.DefaultStatisticsService - Starting service
    11:42:36.973 [main] DEBUG org.ehcache.core.spi.ServiceLocator - All Services successfully started, 20 Services in 31ms
    11:42:36.973 [main] DEBUG org.ehcache.core.EhcacheManager - Creating Cache 'custom' in EhcacheManager.
    11:42:36.989 [main] DEBUG org.ehcache.impl.persistence.DefaultLocalPersistenceService - Destroying file based persistence context for custom
    11:42:36.989 [main] DEBUG org.ehcache.impl.persistence.FileUtils - Created d:\cache\file
    11:42:36.989 [main] DEBUG org.ehcache.impl.persistence.FileUtils - Created d:\cache\file\custom_f9ac14b63a75faf57d8db6f919bfabb2502d273c
    11:42:36.989 [main] DEBUG org.ehcache.impl.internal.spi.serialization.DefaultSerializationProvider - Serializer for <java.lang.String> : org.ehcache.impl.serialization.StringSerializer@5a4041cc
    11:42:36.989 [main] DEBUG org.ehcache.impl.internal.spi.serialization.DefaultSerializationProvider - Serializer for <com.example.demo.test.Person> : com.example.demo.test.PersonSerializer@2f8f5f62
    11:42:37.004 [main] DEBUG org.ehcache.impl.internal.spi.copy.DefaultCopyProvider - Copier for <java.lang.String> : org.ehcache.impl.copy.IdentityCopier@4e4aea35
    11:42:37.004 [main] DEBUG org.ehcache.impl.internal.spi.copy.DefaultCopyProvider - Copier for <com.example.demo.test.Person> : org.ehcache.impl.copy.IdentityCopier@1442d7b5
    11:42:37.020 [main] INFO org.ehcache.sizeof.filters.AnnotationSizeOfFilter - Using regular expression provided through VM argument org.ehcache.sizeof.filters.AnnotationSizeOfFilter.pattern for IgnoreSizeOf annotation : ^.*cache\..*IgnoreSizeOf$
    11:42:37.129 [main] INFO org.ehcache.sizeof.impl.JvmInformation - Detected JVM data model settings of: 64-Bit HotSpot JVM with Compressed OOPs
    11:42:37.192 [main] INFO org.ehcache.sizeof.impl.AgentLoader - Failed to attach to VM and load the agent: class java.io.IOException: Can not attach to current VM
    11:42:37.207 [main] DEBUG org.ehcache.impl.internal.store.heap.OnHeapStore - No expiration strategy detected
    11:42:37.299 [main] DEBUG org.ehcache.impl.persistence.FileUtils - Created d:\cache\file\custom_f9ac14b63a75faf57d8db6f919bfabb2502d273c\offheap-disk-store
    11:42:37.383 [main] DEBUG class org.ehcache.core.Ehcache-custom - Initialize successful.
    11:42:37.383 [main] INFO org.ehcache.core.EhcacheManager - Cache 'custom' created in EhcacheManager.
    11:42:37.383 [main] DEBUG org.ehcache.core.internal.statistics.DefaultStatisticsService - Moving from UNINITIALIZED to AVAILABLE
    11:42:37.383 [main] DEBUG org.ehcache.core.internal.statistics.DefaultStatisticsService - Cache added custom
    11:42:37.398 [main] DEBUG org.ehcache.core.EhcacheManager - Initialize successful.
    11:42:37.508 [main] DEBUG org.ehcache.sizeof.filters.AnnotationSizeOfFilter - org.ehcache.sizeof.annotations.IgnoreSizeOf matched IgnoreSizeOf annotation pattern ^.*cache\..*IgnoreSizeOf$
    Person(name=瓜田李下, age=20)

[20210516095545614.png]: /images/20221020/fa57c470105a4fbc8f88f90983f7ea52.png