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Dubbo extension point loading mechanismprefaceThis paper first introduces the overview of the existing Dubbo loading mechanism, including the improvements made by Dubbo and some features. Then it introduces some key annotations of the loading mechanism, @ SPI, @ Adaptive, @ Activate. Then it introduces the workflow and implementation principle ...

The first exercise is to calculate factorials: int main() { int i = 0; int ret = 1; int n = 0; while (1) { scanf("%d", &n); if (0 == n) { printf("Exit program\n"); break; } for (i = 1,ret = 1; i <= n; i++) { ret *= i; } printf("%d The factorial of is:%d\n", n, ret); } return 0; } Compared with the cla ...

catalogue Programming transaction Simple case TransactionTemplate  PlatformTransactionManager Declarative transaction Simple use Simple example @Transactional common properties Transaction propagation behavior Points needing attention Programming transaction Programmed transaction management is intrusive transaction management, u ...

catalogue Basic concepts of constructor Function of constructor Constructor form Call timing of constructor Default constructor Implicitly generated constructor "=default" Example 4_ 1 Revision 1 Example 4_ 1 revision 2 Delegating constructors review Delegating constructors copy constructor Copy constructor definition Impli ...

catalogue Basic use of functions Parameters of function  Function call Nested calls and chained access to functions Declaration and use of functions Recursion of function Basic use and recursion of functions 1, What is a function Baidu Encyclopedia's definition of function: https://baike.baidu.com/item/%E5%87%BD%E6%95%B0/301912https ...

1. go Language Overview go core programming direction: Blockchain R & D Engineergo server / Game Software Engineergo distributed / Cloud Computing Software Engineer Advantages of go: data processingHigh concurrency Why did google create go language: The hardware technology is updated frequently and the performance is improved rapidly. ...

Explanation: I When using the logging module When writing code in python, the basic lines of the logging module are configured as follows: import logging logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s') logger = logging.getLogger(__name__) logger.info('this is another debug message') logg ...

State definition Thread pool ThreadPoolExecutor has two properties: running state and number of threads. The number of threads is easy to understand, that is, how many threads are in the pool; There are five operating states, namely RUNNING: In operation, Is the initial state, that is, the thread pool just created is in this state. SHUTDOWN: ...

When different threads in the same process operate to share resources, we only need to lock the resources. For example, we can ensure the correctness of the operation by using the tools under JUC. Students unfamiliar with JUC can read the following articles: On SynchronizedSynchronized optimizationFoundation stone of JUC - Unsafe class Howev ...

What is the lifecycle of spring beans For ordinary Java objects, create the object when new, and then the object can be used. Once the object is no longer used, Java automatically garbage collects it. The objects in Spring are beans. Beans are no different from ordinary Java objects, except that Spring no longer uses the new object itself, bu ...