Question

我将javaee 8用于我的项目，并具有以下类：

public class PersonRepository {
    @Inject
    @Mongo(collection = "users")
    private MongoCollection collection;

    // define some methods ....
}     

@ApplicationScoped
public class MongoProducer {

    @Inject
    private MongoClient mongoClient;

    @Produces
    @Mongo
    protected MongoCollection produceCollection(InjectionPoint ip) {
        Mongo mongo = getMongoAnnotation(ip);
        return mongoClient.getDatabase("sample").getCollection(mongo.collection());
    }

    private Mongo getMongoAnnotation(InjectionPoint ip) {
        return ip.getAnnotated().getAnnotation(Mongo.class);
    }
}    

@MongoClientDefinition(
        name = "mongoClient",
        dbName = "sample",
        username = "admin",
        password = "adminpass"
)
public class MongoConnectionConfig {
}

不幸的是，mongoClient目前没有任何方法来获取与其连接的数据库名称。（也许我找不到！）
如何从ProduceCollection方法扫描MongoClientDefinition批注？
我想从该注释设置数据库名称。（替换“样本”）。
注意：我为MongoClientDefinition创建了CDI扩展。

Answer 1

简单的想法是BeanManager：
我修改了扩展名，并为dbName添加了getter方法。
github

上的完整项目

@ApplicationScoped
public class MongoProducer {

    @Inject
    private MongoClient mongoClient;

    @Inject
    private BeanManager bm;

    @Produces
    @Mongo
    protected MongoCollection produceCollection(InjectionPoint ip) {
        String dbName = bm.getExtension(MongoClientExtension.class).getDatabaseName();
        Mongo mongo = getMongoAnnotation(ip);
        return mongoClient.getDatabase(dbName).getCollection(collectionName,mongo.collection());
    }

    private Mongo getMongoAnnotation(InjectionPoint ip) {
        return ip.getAnnotated().getAnnotation(Mongo.class);
    }
}

来自bean的JavaEE扫描注释

1 个答案: