在Java Appengine开发过程中使用Google Cloud SQL（而不是本地MySQL实例）

Question

Instead of using a local MySQL instance during Java appengine development, i (sometimes) want to use a real Google Cloud SQL instance (for example; to debug with the real thing).

It is possible to open a JDBC connection from IntelliJ => Databases, but when i'm using this URL in my Maven POM its not working... In this situation i'm already using the appengine driver instead of the local mysql connector.

Why isn't this working? How should i configure my POM? I'm using the following configuration when using the local MySQL instance;

<extraJvmArgs>
 -Xmx512M -Xms512M -XX:MaxPermSize=128M \
 -Dappengine.user.timezone.impl=UTC \
 -Drdbms.server=local \
 -Drdbms.driver=com.mysql.jdbc.Driver \
 -Drdbms.url=jdbc:mysql://localhost:3306/mydb?user=root
</extraJvmArgs>

And my non working Google Cloud SQL instance attempts;

<extraJvmArgs>
 -Xmx512M -Xms512M -XX:MaxPermSize=128M \
 -Dappengine.user.timezone.impl=UTC \
 -Drdbms.server=local \
 -Drdbms.driver=com.mysql.jdbc.Driver \
 -Drdbms.url=jdbc:google:rdbms://domain.com:myportal:myportal/mydb?user=root
</extraJvmArgs>

or

<extraJvmArgs>
 -Xmx512M -Xms512M -XX:MaxPermSize=128M \
 -Dappengine.user.timezone.impl=UTC \
 -Drdbms.server=local \
 -Drdbms.driver=com.google.appengine.api.rdbms.dev.LocalRdbmsServiceLocalDriver \
 -Drdbms.url=jdbc:google:rdbms://domain.com:myportal:myportal/mydb?user=root
</extraJvmArgs>

All my (remote) attempts result in a connection timeout...

Answer 1

不建议使用'jdbc：google：rdbms'的连接方式，从外部应用程序连接至Cloud SQL的首选方法是通过'jdbc：mysql'（ docs ）使用IP连接。