dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.capacity.sight;
 
import java.util.HashSet;
import java.util.Set;
 
import foundation.dao.preload.Bucket;
import foundation.json.IJSONProvider;
import foundation.json.IJSONWriter;
import foundation.util.Util;
 
public class SightBucket extends Bucket<SightAgent> implements IJSONProvider {
 
    private static SightBucket instance;
    private Set<String> freeTables;
    
    private SightBucket() {
        freeTables = new HashSet<String>();
    }
    
    public static SightBucket getInstance() {
        return instance;
    }
    
    public static SightBucket newInstance() {
        return new SightBucket();
    }
    
    public void activate() {
        instance = this;
    }
 
    public void loadOneFreeTable(String tableName) {
        if (Util.isEmpty(tableName)) {
            return;
        }
        
        tableName = tableName.toLowerCase();
        freeTables.add(tableName);        
    }
    
    @Override
    public void writeJSON(IJSONWriter writer) {
        writer.beginArray("sights");
        
        for (SightAgent sight: items) {
            writer.beginObject();
            sight.writeJSONBody(writer);
            writer.endObject();
        }
        
        writer.endArray();
    }
 
}