Question

我正在努力使我的jBPM项目持久化。因此我使用了这个tutorial。起初我导入了所需的所有额外的罐子（根据网站）。我还添加了mysql-connector-java-5.1.20-bin.jar，因为我想使用mysql作为持久存储。

之后我将“有状态”代码添加到我的项目中：

KnowledgeBase kbase = readKnowledgeBase(name);
StatefulKnowledgeSession ksession = null;
JBPMHelper.startH2Server();
JBPMHelper.setupDataSource();
if(ProcessManager.sessionId == -1){
    ksession = JBPMHelper.newStatefulKnowledgeSession(kbase);
    ProcessManager.sessionId = ksession.getId();
}
else {
ksession = JBPMHelper.loadStatefulKnowledgeSession(
    kbase,
    ProcessManager.sessionId);
}

然后我添加了resources/META-INF文件jBPM.properties：

persistence.datasource.name = JDBC / jbpm的-DS

persistence.datasource.user =测试

persistence.datasource.password =测试

persistence.datasource.url = JDBC：MySQL的：//本地主机：3306 / helpme

persistence.datasource.driverClassName = com.mysql.jdbc.Driver

persistence.enabled =真

persistence.persistenceunit.name = org.jbpm.persistence.jpa

persistence.persistenceunit.dialect = org.hibernate.dialect.MySQLDialect

如果我现在运行该项目，则始终存在以下异常（在ksession = JBPMHelper.newStatefulKnowledgeSession(kbase);上）：

javax.persistence.PersistenceException：[PersistenceUnit：org.jbpm.persistence.jpa]无法构建EntityManagerFactory

引起：org.hibernate.HibernateException：找不到数据源

引起：javax.naming.NameNotFoundException：名称jdbc未绑定在此Context中

Answer 1

我找到了解决问题的方法。通常，JBPMHelper直接从jar加载jBPM：

public static Properties getProperties() {
    Properties properties = new Properties();
    try {
        properties
            .load(JBPMHelper.class.getResourceAsStream("/jBPM.properties"));
    } catch (Throwable t) {
    // do nothing, use defaults
    }

    return properties;
}

我替换了加载机制，现在正在正确加载jBPM.properties：

public static Properties getProperties() {
    Properties properties = new Properties();
    try {
        InputStream input
            = new FileInputStream("./resources/META-INF/jBPM.properties");
        properties.load(input);
        System.out.println("RPOP"+properties.toString());
    } catch (Throwable t) {
    // do nothing, use defaults
    }

    return properties;
}

（我的回答改编自BartoszKP - 谢谢）

jBPM持久性：无法构建EntityManagerFactory

1 个答案: