??? 首先介紹一下我們的系統(tǒng)構(gòu)架，采用webwork，spring，hibernate整合架構(gòu),現(xiàn)在引入Quartz框架,Quartz和 hibernate各自擁有的自己數(shù)據(jù)庫配置和連接池的配置,現(xiàn)在的任務(wù)是把兩者用同一套配置.
先談?wù)凲uartz,我用的版本是1.5.1,后面的版本我沒去看了,沒時(shí)間,接下來說的都以這個(gè)版本為準(zhǔn).Quartz雖然在提供一個(gè) ConnectionProvider接口,提供給程序擴(kuò)展,但是看它的StdSchedulerFactory實(shí)現(xiàn)類,要對(duì)它進(jìn)行擴(kuò)展還是一件比較麻煩 一件事情,所以我就直接修改了StdSchedulerFactory類,以達(dá)到的我的需求.
接下來的問題是既然要結(jié)合,那么讓Quartz來提供連接池配置呢還是有Hibernate提供.研究了兩者的連接池方面的源代碼,發(fā)現(xiàn) Hibernate的連接池設(shè)計(jì)遠(yuǎn)遠(yuǎn)好于Quartz,Quartz目前只提供一個(gè)連接池提供類PoolingConnectionProvider,而 且使用的連接池是dbcp,這個(gè)連接池聽說問題多多,相反hibernate提供了更加靈活的配置,所以連接池由Hibernate提供.
??? 首先實(shí)現(xiàn)一個(gè)Quartz中ConnectionProvider子類HibernateConnectionProvider
public class HibernateConnectionProvider implements ConnectionProvider {
??? private Connection con = null;
??? protected static ThreadLocal hibernateHolder = new ThreadLocal();
??? public Connection getConnection() throws SQLException {
??? ??? con = null;
??? ??? SessionFactoryImpl sessionFactory = null;
??? ??? sessionFactory = (SessionFactoryImpl) Global.getSessionFacotry();
??? ??? con = sessionFactory.getConnectionProvider().getConnection();
??? return con;
}
public void shutdown() throws SQLException {
??? // FIXME Auto-generated method stub
}
}
,然后修改StdSchedulerFactory,在不破壞其本來的邏輯和可配置性下進(jìn)行了相應(yīng)的修改.修改的是private Scheduler instantiate() throws SchedulerException方法,找到//Set up any DataSources段進(jìn)行修改,代碼如下:
String[] dsNames = cfg.getPropertyGroups(PROP_DATASOURCE_PREFIX);
??? ??? for (int i = 0; i < dsNames.length; i++) {
??? ??? ??? PropertiesParser pp = new PropertiesParser(cfg.getPropertyGroup(
??? ??? ??? ??? ??? PROP_DATASOURCE_PREFIX + "." + dsNames[i], true));

??? ??? ??? String dsDriver = pp
??? ??? ??? ??? ??? .getStringProperty(PROP_DATASOURCE_DRIVER, null);
??? ??? ??? String dsURL = pp.getStringProperty(PROP_DATASOURCE_URL, null);
??? ??? ??? boolean dsAlwaysLookup = pp.getBooleanProperty(
??? ??? ??? ??? ??? PROP_DATASOURCE_JNDI_ALWAYS_LOOKUP, false);
??? ??? ??? String dsUser = pp.getStringProperty(PROP_DATASOURCE_USER, "");
??? ??? ??? String dsPass = pp.getStringProperty(PROP_DATASOURCE_PASSWORD, "");
??? ??? ??? int dsCnt = pp.getIntProperty(PROP_DATASOURCE_MAX_CONNECTIONS, 3);
??? ??? ??? String providerClass = pp.getStringProperty(
??? ??? ??? ??? ??? PROP_DATASOURCE_PROVIDER_CLASS, null);
??? ??? ??? String dsJndi = pp
??? ??? ??? ??? ??? .getStringProperty(PROP_DATASOURCE_JNDI_URL, null);
??? ??? ??? String dsJndiInitial = pp.getStringProperty(
??? ??? ??? ??? ??? PROP_DATASOURCE_JNDI_INITIAL, null);
??? ??? ??? String dsJndiProvider = pp.getStringProperty(
??? ??? ??? ??? ??? PROP_DATASOURCE_JNDI_PROVDER, null);
??? ??? ??? String dsJndiPrincipal = pp.getStringProperty(
??? ??? ??? ??? ??? PROP_DATASOURCE_JNDI_PRINCIPAL, null);
??? ??? ??? String dsJndiCredentials = pp.getStringProperty(
??? ??? ??? ??? ??? PROP_DATASOURCE_JNDI_CREDENTIALS, null);
??? ??? ??? String dsValidation = pp.getStringProperty(
??? ??? ??? ??? ??? PROP_DATASOURCE_VALIDATION_QUERY, null);
??? ??? ??? if (providerClass == null
??? ??? ??? ??? ??? || providerClass.equals("")
??? ??? ??? ??? ??? || providerClass
??? ??? ??? ??? ??? ??? ??? .equals("org.quartz.utils.PoolingConnectionProvider")) {
??? ??? ??? ??? if (dsDriver == null) {
??? ??? ??? ??? ??? initException = new SchedulerException(
??? ??? ??? ??? ??? ??? ??? "Driver not specified for DataSource: "
??? ??? ??? ??? ??? ??? ??? ??? ??? + dsNames[i]);
??? ??? ??? ??? ??? throw initException;
??? ??? ??? ??? }
??? ??? ??? ??? if (dsURL == null) {
??? ??? ??? ??? ??? initException = new SchedulerException(
??? ??? ??? ??? ??? ??? ??? "DB URL not specified for DataSource: "
??? ??? ??? ??? ??? ??? ??? ??? ??? + dsNames[i]);
??? ??? ??? ??? ??? throw initException;
??? ??? ??? ??? }
??? ??? ??? ??? try {
??? ??? ??? ??? ??? PoolingConnectionProvider cp = new PoolingConnectionProvider(
??? ??? ??? ??? ??? ??? ??? dsDriver, dsURL, dsUser, dsPass, dsCnt,
??? ??? ??? ??? ??? ??? ??? dsValidation);
??? ??? ??? ??? ??? dbMgr = DBConnectionManager.getInstance();
??? ??? ??? ??? ??? dbMgr.addConnectionProvider(dsNames[i], cp);
??? ??? ??? ??? } catch (SQLException sqle) {
??? ??? ??? ??? ??? initException = new SchedulerException(
??? ??? ??? ??? ??? ??? ??? "Could not initialize DataSource: " + dsNames[i],
??? ??? ??? ??? ??? ??? ??? sqle);
??? ??? ??? ??? ??? throw initException;
??? ??? ??? ??? }
??? ??? ??? } else if (providerClass
??? ??? ??? ??? ??? .equals("org.quartz.utils.JNDIConnectionProvider")) {
??? ??? ??? ??? Properties props = null;
??? ??? ??? ??? if (null != dsJndiInitial || null != dsJndiProvider
??? ??? ??? ??? ??? ??? || null != dsJndiPrincipal || null != dsJndiCredentials) {
??? ??? ??? ??? ??? props = new Properties();
??? ??? ??? ??? ??? if (dsJndiInitial != null)
??? ??? ??? ??? ??? ??? props.put(PROP_DATASOURCE_JNDI_INITIAL, dsJndiInitial);
??? ??? ??? ??? ??? if (dsJndiProvider != null)
??? ??? ??? ??? ??? ??? props.put(PROP_DATASOURCE_JNDI_PROVDER, dsJndiProvider);
??? ??? ??? ??? ??? if (dsJndiPrincipal != null)
??? ??? ??? ??? ??? ??? props.put(PROP_DATASOURCE_JNDI_PRINCIPAL,
??? ??? ??? ??? ??? ??? ??? ??? dsJndiPrincipal);
??? ??? ??? ??? ??? if (dsJndiCredentials != null)
??? ??? ??? ??? ??? ??? props.put(PROP_DATASOURCE_JNDI_CREDENTIALS,
??? ??? ??? ??? ??? ??? ??? ??? dsJndiCredentials);
??? ??? ??? ??? }
??? ??? ??? ??? JNDIConnectionProvider cp = new JNDIConnectionProvider(dsJndi,
??? ??? ??? ??? ??? ??? props, dsAlwaysLookup);
??? ??? ??? ??? dbMgr = DBConnectionManager.getInstance();
??? ??? ??? ??? dbMgr.addConnectionProvider(dsNames[i], cp);
??? ??? ??? } else if (providerClass
??? ??? ??? ??? ??? .equals("org.quartz.utils.HibernateConnectionProvider")) {
??? ??? ??? ??? HibernateConnectionProvider cp = new HibernateConnectionProvider();
??? ??? ??? ??? dbMgr = DBConnectionManager.getInstance();
??? ??? ??? ??? dbMgr.addConnectionProvider(dsNames[i], cp);
??? ??? ??? } else {
??? ??? ??? ??? initException = new SchedulerException(
??? ??? ??? ??? ??? ??? "Provider_Class not Supported: " + providerClass);
??? ??? ??? ??? throw initException;
??? ??? ??? }

??? ??? }
??? 最后就是修改配置文件quartz.properties,加入
#org.quartz.dataSource.myDS.provider_class = org.quartz.utils.JNDIConnectionProvider
#org.quartz.dataSource.myDS.provider_class = org.quartz.utils.PoolingConnectionProvider
org.quartz.dataSource.myDS.provider_class = org.quartz.utils.HibernateConnectionProvider加#的供參考.
??? 經(jīng)過測(cè)試,需要對(duì)hibernate連接池的一些參數(shù)進(jìn)行微調(diào),這樣就完成了Quartz與Hibernate在數(shù)據(jù)庫的連接方面的結(jié)合,如果有更好的解決方案,請(qǐng)聯(lián)系我.