Programmer Think

The client can also use the SAVE command to create a snapshot. The Redis server that receives the SAVE command will not respond to any other commands before the snapshot is created; Note: the SAVE command is not commonly used. Before the snapshot is created, Redis is blocked and cannot provide external services. 3. Configuration snapshot t ...

} @Override public String toString() { return "Engine{" + "name='" + name + '\'' + '}'; } public void run() { System.out.println("The engine is turning~~~"); } } Then we need one Module Class to generate dependent objects. Previously introduced@Module Is used to standard this class, and@Provide It is used ...

servlet There is a good definition of lifetime, including loading and instantiation, initialization, processing requests, and service termination. This survival period is determined by javax.servlet.Servlet Interfaced init，service and destroy Method expression. servlet After being instantiated by the server, the container runs its init Met ...

4.gRPC:gRPC is the underlying network library implemented by the Google team based on Netty development, and this framework also has a GoLanguage version based on NetLibrary development 5.RMI:rmi can be said to be one of the earliest RPC frameworks in java, and this RPC framework is developed by sun team and integrated in JDK. It can be said t ...

Output results: Second timestamp: 1591778815 Haos timestamp: 1591778815967 Nanosecond: 967 million If the string format is not correct, for example, it is modified to 2020-06-10T08:46:55.967, Java. Net will be thrown time. format. Datetimeparseexception exception, as shown in the following figure: 2. LocalDate 2.1 get current dat ...

Two steps 1. Implement filter interface and filter method 2. Add @ Configuration annotation to add the custom filter to the filter chain @Configuration public class WebConfiguration { @Bean public RemoteIpFilter remoteIpFilter() { return new RemoteIpFilter(); } @Bean public FilterRegistrationBean tes ...

The user makes a request, and the Dispatcher Servlet receives and intercepts the request. Let's assume the requested URL is: http://localhost:8080/sm/hello As above, the URL is split into three parts: http://localhost:8080 Represents a server domain name sm represents a web site deployed on a server hello representation controller Throu ...

Characteristics of collection class: the type and size can be uncertain Usage scenario: the stored data should change frequently Common collection =================================================================== Collections are mainly divided into two categories: Collection and Map: Collection: It is the top-level parent class of a ...

</exclusion> </exclusions> </dependency> <!--HTTPClient--> <dependency> <groupId>com.squareup.okhttp3</groupId> <artifactId>okhttp</artifactId> <version>4.3.1</version> </dependency> <dependency> <groupId>com.squareup.okht ...

public class PathClassLoader extends BaseDexClassLoader { public PathClassLoader(String dexPath, ClassLoader parent) { super(dexPath, null, null, parent); } public PathClassLoader(String dexPath, String librarySearchPath, ClassLoader parent){ super(dexPath, null, librarySearchPath, parent); } } You can see that the only difference ...