dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.data.object;
 
import java.sql.PreparedStatement;
 
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
 
import foundation.data.entity.Entity;
import foundation.data.entity.EntitySet;
import foundation.persist.ISavable;
import foundation.persist.NamedSQL;
import foundation.persist.SQLRunner;
import foundation.persist.source.NamedDataSource;
import foundation.variant.provider.IVariantsProvider;
 
public class BatchEntitySaver implements ISavable {
 
    private static Logger logger;
    private NamedDataSource dataSource;
    private EntitySet entitySet;
    private int savedCount;
    private int totalSavedCount;
    
    static {
        logger = LogManager.getLogger(BatchEntitySaver.class);
    }
    
    
    public BatchEntitySaver(NamedDataSource dataSource) throws Exception {
        this.dataSource = dataSource;
    }                                     
 
    public int save(EntitySet entitySet, IVariantsProvider... providers) throws Exception {
        this.entitySet = entitySet;
        
        NamedSQL namedSQL = NamedSQL.getInstance(dataSource.getDBaseType(), "batchInsertEntity");
        
        try {
            namedSQL.setVariants(null, providers);
            SQLRunner.saveData(namedSQL, this);            
        }
        catch(Exception e) {
            printError(namedSQL, e);
            throw e;
        }
 
        return savedCount;        
    }
 
    @Override
    public void saveData(PreparedStatement stmt, Object... agrs) throws Exception {
        int fieldCount = entitySet.getFieldCount();
 
        for (Entity entity: entitySet) {
            for (int i = 0; i < fieldCount; i++) {
                Object object = entity.getFieldTypeValue(i);
                stmt.setObject(i + 1, object);
            }
            
            stmt.addBatch();
        }
        
        stmt.executeBatch();
        stmt.clearBatch();
        
        savedCount = entitySet.size();
        totalSavedCount = totalSavedCount + savedCount;
    }
    
    private void printError(NamedSQL namedSQL, Exception e) {
        logger.error("load data error:");
        
        try {
            logger.error("sql:" + namedSQL.toString());
            
            if (entitySet != null) {
                int i = 1;
                
                for (Entity entity: entitySet) {
                    logger.error("line" + i + ":" + entity.toString());
                    i++;
                    
                    if (i > 5) {
                        break;
                    }
                }
            }
        } 
        catch (Exception e1) {
            logger.error(e1);
        }
    }
 
    public int getSavedCount() {
        return savedCount;
    }
 
    public int getTotalSavedCount() {
        return totalSavedCount;
    }
    
}