Google App Engine API注释-使用环境变量

Question

我们正在使用App Engine和Firebase，但有一个小问题。我们想在API批注中使用环境变量，但遇到了障碍。

package com.myapp.services;

import com.google.api.server.spi.auth.EspAuthenticator;
import com.google.api.server.spi.auth.common.User;
import com.google.api.server.spi.config.*;


@Api(
    name = "contacts",
    version = "v1",
    authenticators = {EspAuthenticator.class},
    issuers = {@ApiIssuer(name = "firebase",
            issuer = "https://securetoken.google.com/<<PROJECT_NAME_GOES_HERE>>",
            jwksUri = "https://www.googleapis.com/service_accounts/v1/metadata/x509/securetoken@system.gserviceaccount.com")},
    issuerAudiences = {@ApiIssuerAudience(name = "firebase", audiences = "<<PROJECT_NAME_GOES_HERE>>")},
    authLevel = AuthLevel.REQUIRED
)
public class ContactService {

    @ApiMethod(path = "create", httpMethod = "post")
    public Long CreateContact(Contact contact, User user) {
        // Create the record
        return contact.id;
    }
}

我们如何根据环境更新发行人和受众的价值？我们可以使用Guice将环境传递到方法中，但是不能注入注释中。

我们只想在部署时更新<<<PROJECT_NAME_GOES_HERE>>>。