Java 如何通过ObjectMapper捕获序列化和反序列化的延迟度量?
我有一个基本的Java 如何通过ObjectMapper捕获序列化和反序列化的延迟度量?,java,jackson,objectmapper,micrometer,Java,Jackson,Objectmapper,Micrometer,我有一个基本的ObjectMapper,为对象中的属性配置了自定义序列化程序和反序列化程序。我想使用测微计计时器计时器捕获整个对象序列化和反序列化的延迟 我可以在顶级对象级别添加自定义序列化器和反序列化器,而不仅仅是我拥有它的属性,并传入计时器以捕获度量。但是,这将需要显式地解析整个对象,其唯一目的是捕获度量。我希望得到反馈,这是唯一的选择,还是有更好的方法来实现这一点 我正在处理的对象 公共类人物{ 字符串名; 智力年龄; 地址 } 我有自定义序列化程序和反序列化程序的属性 公共类地址{ 字
ObjectMapper
,为对象中的属性配置了自定义序列化程序和反序列化程序。我想使用测微计计时器计时器捕获整个对象序列化和反序列化的延迟
我可以在顶级对象级别添加自定义序列化器和反序列化器,而不仅仅是我拥有它的属性,并传入计时器
以捕获度量。但是,这将需要显式地解析整个对象,其唯一目的是捕获度量。我希望得到反馈,这是唯一的选择,还是有更好的方法来实现这一点
我正在处理的对象
公共类人物{
字符串名;
智力年龄;
地址
}
我有自定义序列化程序和反序列化程序的属性
公共类地址{
字符串addLineOne;
字符串addline2;
int-zipCode;
}
ObjectMapper
已配置
@Bean
公共对象映射器对象映射器(){
ObjectMapper ObjectMapper=新的ObjectMapper();
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
objectMapper.configure(在未知属性上反序列化.FAIL\u,false);
SimpleModule=新的SimpleModule();
addDeserializer(Address.class,新的AddressDeserializer());
module.addSerializer(Address.class,新的AddressSerializer());
objectMapper.registerModule(模块);
返回对象映射器;
}
对于POJO
反序列化Jackson
默认情况下使用com.fasterxml.Jackson.databind.desr.BeanDeserializer
类。我们可以使用com.fasterxml.jackson.databind.desr.beandSerializerModifier
类来扩展和注册它。下面的例子说明了这个想法:
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.BeanDescription;
import com.fasterxml.jackson.databind.DeserializationConfig;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.deser.BeanDeserializer;
import com.fasterxml.jackson.databind.deser.BeanDeserializerBase;
import com.fasterxml.jackson.databind.deser.BeanDeserializerModifier;
import com.fasterxml.jackson.databind.module.SimpleModule;
import java.io.IOException;
public class JsonApp {
public static void main(String[] args) throws Exception {
ObjectMapper mapper = objectMapper();
String json = mapper.writeValueAsString(new Person());
for (int i = 0; i < 10; i++) {
mapper.readValue(json, Person.class);
}
}
public static ObjectMapper objectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
SimpleModule module = new SimpleModule();
module.setDeserializerModifier(new BeanDeserializerModifier() {
@Override
public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config, BeanDescription beanDesc, JsonDeserializer<?> deserializer) {
if (deserializer instanceof BeanDeserializer && beanDesc.getBeanClass() == Person.class) {
return new TimerBeanDeserializer((BeanDeserializerBase) deserializer);
}
return super.modifyDeserializer(config, beanDesc, deserializer);
}
});
module.addDeserializer(Address.class, new AddressDeserializer());
module.addSerializer(Address.class, new AddressSerializer());
objectMapper.registerModule(module);
return objectMapper;
}
}
class TimerBeanDeserializer extends BeanDeserializer {
private Timer timer = new Timer();
protected TimerBeanDeserializer(BeanDeserializerBase src) {
super(src);
}
@Override
public Object deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
timer.start();
Object res = super.deserialize(p, ctxt);
System.out.println("Deserialization took: " + timer.end() + " nanos");
return res;
}
}
class Timer {
private long start;
public void start() {
this.start = System.nanoTime();
}
public long end() {
return System.nanoTime() - start;
}
}
另见:
如果您对objectmapper上的操作计时感兴趣,从而对序列化计时,为什么不从objectmapper继承并在重写的方法中添加计时信息呢?
Deserialization took: 660853 nanos
Deserialization took: 48276 nanos
Deserialization took: 43741 nanos
Deserialization took: 44786 nanos
Deserialization took: 39230 nanos
Deserialization took: 39917 nanos
Deserialization took: 39745 nanos
Deserialization took: 38330 nanos
Deserialization took: 38994 nanos
Deserialization took: 38717 nanos