eureka-client-1.8.8-sources.jar!/com/netflix/appinfo/HealthCheckHandler.java

hystrix-core-1.5.12-sources.jar!/com/netflix/hystrix/HystrixThreadPool.java

hystrix-core-1.5.12-sources.jar!/com/netflix/hystrix/HystrixCircuitBreaker.java

hystrix-core-1.5.12-sources.jar!/com/netflix/hystrix/strategy/HystrixPlugins.java

CompositeData接口定义了getCompositeType、get、getAll、containsKey、containsValue、values、equals、hashCode、toString方法

spring-cloud-alibaba-2.1.0.RELEASE/spring-cloud-alibaba-dubbo/src/main/java/com/alibaba/cloud/dubbo/registry/SpringCloudRegistryFactory.java

spring-cloud-zookeeper-discovery-2.1.2.RELEASE-sources.jar!/org/springframework/cloud/zookeeper/discovery/dependency/DependenciesBasedLoadBalancer.java

dubbo-spring-boot-project-2.7.3/dubbo-spring-boot-compatible/autoconfigure/src/main/java/org/apache/dubbo/spring/boot/env/DubboDefaultPropertiesEnvironmentPostProcessor.java

部分参考： 糖拌咸鱼的博客 百度百科 JSON是什么鬼？ JSON不是一种编程语言，而是一种约定好的数据格式，全称为javascript object Notation，常用于前后端的交互。 但同时因为其优点，现在也用于于配置文件的书写，例如大部分程序员喜欢用Sublime Text就用JSON写了配置文件。 JSON是“名称/值”对的集合（A collection of ...

nacos-spring-boot-project/nacos-config-spring-boot-actuator/src/main/java/com/alibaba/boot/nacos/actuate/autoconfigure/NacosConfigHealthIndicatorAutoConfiguration.java

nacos-spring-boot-project/nacos-config-spring-boot-autoconfigure/src/main/java/com/alibaba/boot/nacos/config/autoconfigure/NacosConfigEnvironmentProcessor.java

canal-1.1.4/common/src/main/java/com/alibaba/otter/canal/common/CanalLifeCycle.java

canal-1.1.4/instance/core/src/main/java/com/alibaba/otter/canal/instance/core/CanalInstanceGenerator.java

canal-1.1.4/sink/src/main/java/com/alibaba/otter/canal/sink/CanalEventDownStreamHandler.java

maxwell-1.25.1/src/main/java/com/zendesk/maxwell/producer/MaxwellKafkaProducer.java

BitCaskLock的acquire方法，先通过lock_acquire获取BitCaskLock，如果出现FileAlreadyExistsException则执行delete_stale_lock；其release方法针对is_write_lock执行file.close()及filename.delete()

BitCaskKeyDir提供了map来存放BitCaskEntry；其put方法使用writeLock.lock()，对于old值为null的或者新值大于old值的才put进去，否则返回false，最后writeLock.unlock()；其get方法使用readLock.lock()从map读取指定key的值，最后readLock.unlock()