Client Initialization Best Practices (Java)

Core Rules

• Client is thread-safe — safe to share across threads without synchronization.
• Use singleton pattern — do NOT create new client instances per request. Frequent new Client() calls waste resources and hurt performance.
• Prefer explicit endpoint over region-based endpoint resolution.

Recommended Client Creation

public class ClientFactory {
    private static volatile com.aliyun.ecs20140526.Client instance;