公开SNS社区即时找朋友链的源代码和部署方案(续六)

Versant数据库的对象查询
Versant数据库可以支持SQL查询和NOSQL查询两种模式,以下为SQL查询的例子:

TransSession session = DistributedDatabaseManager.getInstance()
.createNewSession();

VQLQuery q = new VQLQuery(
session,

DistributedDatabaseManager.getInstance().HPC_DEMO_NETWORK_NAME,
"select selfoid from com.versant.domain.Person where firstName='AAF1' and lastName='AAL1'");
//"select * from com.versant.domain.Person");

System.out.println("About to execute query, and load root object.");
VEnumeration results = q.execute();

// 创建已经走过的朋友路径,避免回环
System.out
.println("--------------------------------------------------------------------------");

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转载自markhe.iteye.com/blog/1495428