Java Definition.getName方法代码示例

import com.datastax.driver.core.ColumnDefinitions.Definition; //导入方法依赖的package包/类
@Override
public DbRecordValuesList[] select(
                                    DbQuery dbQuery,
                                    DbReturnModes dbReturnMode ) throws DbException {

    connect();

    ArrayList<DbRecordValuesList> dbRecords = new ArrayList<DbRecordValuesList>();

    String sqlQuery = dbQuery.getQuery();
    if (allowFiltering) {
        sqlQuery += " ALLOW FILTERING";
    }

    if (log.isDebugEnabled()) {
        log.debug(sqlQuery);
    }

    ResultSet results = session.execute(sqlQuery);

    int currentRow = 0;
    Iterator<Row> it = results.iterator();
    while (it.hasNext()) {
        Row row = it.next();

        currentRow++;
        if (log.isDebugEnabled()) {
            log.debug("Result row number: " + currentRow);
        }

        DbRecordValuesList recordList = new DbRecordValuesList();

        for (Definition columnDefinition : row.getColumnDefinitions()) {
            DbColumn dbColumn = new DbColumn(columnDefinition.getTable(), columnDefinition.getName());
            dbColumn.setColumnType(columnDefinition.getType().getName().toString());

            Object value = extractObjectFromResultSet(row, columnDefinition);

            DbRecordValue recordValue = new DbRecordValue(dbColumn, value);
            recordList.add(recordValue);
        }
        dbRecords.add(recordList);
    }

    return dbRecords.toArray(new DbRecordValuesList[]{});
}
 

import com.datastax.driver.core.ColumnDefinitions.Definition; //导入方法依赖的package包/类
private static void syncQuorum(String key){
	logger.info("Performing sync operation---");
	String[] splitString = key.split("\\.");
	String keyspaceName = splitString[0];
	String tableName = splitString[1];
	String primaryKeyValue = splitString[2];
	
	//get the primary key d
	TableMetadata tableInfo = returnColumnMetadata(keyspaceName, tableName);
	String primaryKeyName = tableInfo.getPrimaryKey().get(0).getName();//we only support single primary key
	DataType primaryKeyType = tableInfo.getPrimaryKey().get(0).getType();
	String cqlFormattedPrimaryKeyValue = convertToCQLDataType(primaryKeyType, primaryKeyValue);
	
	//get the row of data from a quorum
	String selectQuery =  "SELECT *  FROM "+keyspaceName+"."+tableName+ " WHERE "+primaryKeyName+"="+cqlFormattedPrimaryKeyValue+";"; 
	ResultSet results = getDSHandle().executeCriticalGet(selectQuery);
	
	//write it back to a quorum
	Row row = results.one();
	ColumnDefinitions colInfo = row.getColumnDefinitions();
	int totalColumns = colInfo.size();
	int counter =1;
	String fieldValueString="";
	for (Definition definition : colInfo){
		String colName = definition.getName();
		if(colName.equals(primaryKeyName))
			continue; 
		DataType colType = definition.getType();
		Object valueObj = getDSHandle().getColValue(row, colName, colType);	
		String valueString = convertToCQLDataType(colType,valueObj);	
		fieldValueString = fieldValueString+ colName+"="+valueString;
		if(counter!=(totalColumns-1))
			fieldValueString = fieldValueString+",";
		counter = counter +1;
	}
	
	String updateQuery =  "UPDATE "+keyspaceName+"."+tableName+" SET "+fieldValueString+" WHERE "+primaryKeyName+"="+cqlFormattedPrimaryKeyValue+";";
	getDSHandle().executePut(updateQuery, "critical");
}
 

import com.datastax.driver.core.ColumnDefinitions.Definition; //导入方法依赖的package包/类
protected CassandraResultSet(BaseCassandraStatement statement, CassandraCqlStatement parsedStmt, ResultSet rs) {
    super(statement, parsedStmt);

    if (rs != null) {
        for (Definition def : rs.getColumnDefinitions()) {
            CassandraColumnDefinition d = new CassandraColumnDefinition(
                    def.getKeyspace(), def.getTable(), def.getName(), def
                    .getType().getName().toString(), false);
            metadata.addColumnDefinition(d);
        }
    }

    _resultSet = rs;
}
 

import com.datastax.driver.core.ColumnDefinitions.Definition; //导入方法依赖的package包/类
@Override
public Hit get(Entity entity) throws Exception {

	String cql = "SELECT * FROM "+entity.getName()+"_"+entity.getMappingHash()+" WHERE rendezvous_id = '" + entity.getId() + "'";

	logger.info(cql);
	
	ResultSet result = session.execute(cql);
	
	List<Value> values = new ArrayList<Value>();
	
	for(Row row : result.all()){
		for(Definition definition : row.getColumnDefinitions().asList()){
			
			String field = definition.getName();
			
			if(!field.equals("rendezvous_id")){
				values.add(new Value(entity.getName(),field,row.getString(field),new Type(DataType.STRING.toString()), this));
				
				logger.info("Added a value for the field "+field);
			}
		}			
	}
	
	Hit hit = new Hit();
	hit.setRelevance(1);
	hit.setValues(values);
	
	return hit;
}
 

import com.datastax.driver.core.ColumnDefinitions.Definition; //导入方法依赖的package包/类
@Override
public List<Hit> query(Entity entity, Set<Value> queryValues) throws Exception {
	
	logger.debug("Searching from Cassandra");
	
	if(queryValues==null || queryValues.isEmpty() || queryValues.size() == 0) throw new Exception("No parameter for the query");
	
	int index = 0;
	String cql = "SELECT * FROM "+entity.getName()+"_"+entity.getMappingHash()+" WHERE ";

	for(Value value:queryValues){

		++index;
		
		cql+=value.getField().getFieldName()+"='"+value.getValue()+"'";
		if(index<queryValues.size()) cql+=" AND ";
		else cql+=" ALLOW FILTERING;";			
	}
			
	logger.info(cql);
	
	ResultSet result = session.execute(cql);
	
	List<Hit> hits = new ArrayList<Hit>();
	
	for(Row row : result.all()){

		Hit hit = new Hit();
		hit.setRelevance(1);
		
		List<Value> values = new ArrayList<Value>();
		
		for(Definition definition : row.getColumnDefinitions().asList()){
			
			String field = definition.getName();
			
			if(!field.equals("rendezvous_id")){
				values.add(new Value(entity.getName(),field,row.getString(field),new Type(DataType.STRING.toString()), this));
			}
		}
		
		hit.setValues(values);
		hits.add(hit);
	}		
	
	logger.info("<"+hits.size()+"> hits where found in Cassandra");
	
	return hits;
}