Play Framework:为 Spring RabbitMQ 监听器手动打开 JPA 上下文

2022-01-11 00:00:00 rabbitmq spring playframework java jpa

我正在使用 Spring-AMQP 来监控 Play 应用程序中的 RabbitMQ 消息队列.

I am using Spring-AMQP to monitor a RabbitMQ message queue in a Play application.

问题是我无法从侦听器代码访问我的数据库，因为 JPA 上下文未在此范围内打开.

The problem is I can not access my database from the listener code since the JPA context is not open in this scope.

我了解 Play Framework 管理 JPA 上下文，以便在处理 HTTP 请求时打开它，但是有没有办法可以从 Play 控制器/作业外部使用 JPA?

I understand Play Framework manages the JPA context so that it is open when processing HTTP requests, but is there a way I can use JPA from outside Play controllers/jobs?

推荐答案

刚刚找到答案是使用JPAPlugin！

Just found the answer was to use JPAPlugin!

监听方法示例:

public void process(Message message) {
    JPAPlugin.startTx(false);
    boolean rollBack = false;
    try {
        // work with your models
        JPA.em().flush();
    } catch (RuntimeException e) {
        rollBack = true;
        // throw exception to prevent msg ACK, need to refine error handling :)
        throw e;
    } finally {
        JPAPlugin.closeTx(rollBack);
    }
}

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