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Definition of proxy pattern: The proxy pattern provides a proxy object for an object, and the proxy object controls the reference of the original object. For example, one person or institution acts on behalf of another person or institution. In some cases, a client does not want or can not directly refer to an object, while a proxy object c ...

This article belongs to xxKarina Original, reproduced please note Personal blog address: https://xxkarina.github.io/ Essentials What is a thread? What are threads? How to Use Threads What are threads? To learn threads, we first need to understand several common concepts: process Every program running on the system is a process. A proc ...

background Execute Java programs in the k8s docker environment, because we set the limit of cpu, memory, so the parameters of the JVM are not associated with the parameters we set when the Java program executes, resulting in the CPU and memory that the JVM perceives as the size of the CPU and memory on our k8s work node.The problem with this is ...

Due to the existence of GC auto-recycling mechanism in Java, the mechanism of reference counting is relatively perfect. Java divides the references of holding objects into strong references, soft references, weak references, virtual references in order of strength and weakness. Good use of references allows GC to quickly recycl ...

Preface; java knowledge is the language foundation for Android development. Although kotlin has been introduced before, we still need to master java well for the following reasons: 1) SDK or java, kotlin also needs to be compiled to run in java; 2) At present, a large number of third-party libraries and inherited and predecessor c ...

What is ByteBuf? The Java NIO provides the ByteBuffer class as a byte buffer, but the use of ByteBuffer is complex, especially requiring flip() to switch between read and write So Netty redesigned a byte buffer ByteBuf with the following features: Extensibility Defines read and write indexes, so flip() switching is not required f ...

"🙊🙊🙊This tutorial is experimental and unsupported." Classic Answer to Last Homework Question: What are the common garbage collectors in Java? In fact, Garbage Collector is closely related to specific JVM implementations. Different vendors (IBM, Oracle) and different versions of JVM offer different choices. Next, let me talk ab ...

When the log plug-in, a function is to print the log file function, debugging today, encountered the above exception, record the investigation process and solutions. The problem lies in calling the following methods: this.processSysLog(log, syslog, JSON.toJSONString(result)); The JSON. to JSONString (Object object) exception r ...

When it comes to distributed nature, we need to talk about distributed and microservices. Microsoft service is a way of software architecture, or a style of structure design. It is not a standard. Its logic is to split an entire service into separate services by business, reduce service dependency, and eliminate server message-driven. Common ex ...

order This article mainly studies jest's Node Checker. NodeChecker jest-common-6.3.1-sources.jar!/io/searchbox/client/config/discovery/NodeChecker.java public class NodeChecker extends AbstractScheduledService { private final static Logger log = LoggerFactory.getLogger(NodeChecker.class); private final static String PUBLISH_ADDRESS_KEY ...