JDO - datanucleus - HSQL错误

Question

对于我当前的项目，我必须使用HSQL-JDO。我正在编写样本应用程序，以检查这是如何工作的。如果我在jdbc中使用HSQL (没有任何orm)，我的代码运行得很好。但是对于JDO，我得到了“套接字创建错误”。

[Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) entered [Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) exited [Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) entered [Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) exited [Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) entered [Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) exited [Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) entered [Server@187a84e4]: [Thread[main,5,main]]: checkRunning(false) exited JdbcOdbcDriver class loaded registerDriver: driver[className=sun.jdbc.odbc.JdbcOdbcDriver,sun.jdbc.odbc.JdbcOdbcDriver@a13f991] DriverManager.initialize: jdbc.drivers = null JDBC DriverManager initialized registerDriver: driver[className=org.hsqldb.jdbcDriver,org.hsqldb.jdbcDriver@44e06940] DriverManager.getConnection("jdbc:hsqldb:hsql://localhost:8974/test_db") trying driver[className=sun.jdbc.odbc.JdbcOdbcDriver,sun.jdbc.odbc.JdbcOdbcDriver@a13f991] *Driver.connect (jdbc:hsqldb:hsql://localhost:8974/test_db) trying driver[className=org.hsqldb.jdbcDriver,org.hsqldb.jdbcDriver@44e06940] SQLState(08000) vendor code(-80) java.sql.SQLException: socket creation error at org.hsqldb.jdbc.Util.sqlException(Unknown Source) at org.hsqldb.jdbc.jdbcConnection.(Unknown Source) at org.hsqldb.jdbcDriver.getConnection(Unknown Source) at org.hsqldb.jdbcDriver.connect(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at org.apache.commons.dbcp.DriverManagerConnectionFactory.createConnection(DriverManagerConnectionFactory.java:78) at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1158) at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106) at org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:444) at org.datanucleus.store.rdbms.RDBMSStoreManager.(RDBMSStoreManager.java:264)

下面是主Server server = new Server(); server.setAddress("localhost"); server.setDatabaseName(0, "test_db"); server.setDatabasePath(0, "test_db"); server.setPort(8974); server.setTrace(true);中的代码

    Properties properties = new Properties();
    properties.setProperty("javax.jdo.PersistenceManagerFactoryClass","org.datanucleus.api.jdo.JDOPersistenceManagerFactory");
    properties.setProperty("javax.jdo.option.ConnectionDriverName","org.hsqldb.jdbcDriver");
    properties.setProperty("javax.jdo.option.ConnectionURL","jdbc:hsqldb:hsql://localhost:8974/test_db");
    properties.setProperty("javax.jdo.option.ConnectionUserName","SA");
    properties.setProperty("javax.jdo.option.ConnectionPassword","");
    properties.setProperty("javax.jdo.option.ConnectionPassword","");

    properties.setProperty("datanucleus.autoCreateSchema","true");
    properties.setProperty("datanucleus.validateTables","false");
    properties.setProperty("datanucleus.validateConstraints","false");

    PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(properties);

    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx=pm.currentTransaction();

    tx.begin();
    pm.makePersistent(new Session("aniruddha"));
    tx.commit();

    Query q = pm.newQuery("SELECT FROM "+Session.class.getName());

    List<Session> sessions = (List<Session>)q.execute();
    //Iterator<Session> iter = sessions.iterator();

    for(Session s : sessions){
        System.out.println(s.getSESSION_ID()+" : "+s.getSESSION_USERNAME());
    }

​

下面是我想要持久化的bean

@PersistenceCapable public class Session { private Session(){ // Default constructor required by jdo } public Session(String session_username){ SESSION_USERNAME = session_username; }

public long getSESSION_ID() {
    return SESSION_ID;
}
public String getSESSION_USERNAME() {
    return SESSION_USERNAME;
}
public void setSESSION_ID(long sESSION_ID) {
    SESSION_ID = sESSION_ID;
}
public void setSESSION_USERNAME(String sESSION_USERNAME) {
    SESSION_USERNAME = sESSION_USERNAME;
}


@PrimaryKey
@Persistent(valueStrategy=IdGeneratorStrategy.INCREMENT)
private long SESSION_ID;
private String SESSION_USERNAME;

}

Answer 1

如果服务器模式不工作，那么您还没有启动HSQLDB服务器。适用于我的任何形式，无论是URL或文件。我完全按照HSQLDB文档从命令行启动服务器。

对于服务器的应用程序接口调用，您似乎遗漏了对"server.start()“的调用。无论哪种方式，问题都出在HSQLDB服务器启动，而不是DataNucleus访问。