dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.right;
 
import java.util.HashMap;
import java.util.Map;
 
public class RangePool {
 
    private Range range;
    private Map<String, Object> dataMap;
    
    public RangePool(Range range) {
        dataMap = new HashMap<String, Object>();
    }
    
    public String apply(String key, RightAssistant assistant) {
        synchronized (this) {
            //1. 如果还没有申请过
            if (!dataMap.containsKey(key)) {
                Object data = assistant.createData(key);
                dataMap.put(key, data);
                assistant.setResult(data, true);
                return key;
            }
            
            //2. 如果已经申请过了
            Object data = dataMap.get(key);
            if (assistant.isExpired(data)) {
                // 如果已经过期，就允许申请
                data = assistant.createData(key);
                dataMap.put(key, data);
                assistant.setResult(data, true);
                return key;                
            }
            
            //3. 已经申请，而且没有过期
            assistant.setResult(data, false);
        }
        
        return key;            
    }
    
    public void release(String key, RightAssistant assistant) {
        
    }
 
    @Override
    public String toString() {
        return range + " Pool " + dataMap.size();
    }
    
}