相关疑难解决方法(0)

注意:我知道这个线程,但它已经很老了,而且,解决方案对我不起作用.

我正在使用App Engine和Cloud SQL,我想在所有应用程序的当前用户之间共享一个开放连接池.我已经尝试了几个连接池实现,它们都与本地开发服务器完美配合,但是,当部署到云时,它们会失败.我想原因是App Engine受限制的"沙箱"环境.有没有人知道在App Engine上工作的JDBC连接池？

Apache Commons DBCP

...
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.apache.commons.dbcp2.PoolableConnection
at com.google.appengine.runtime.Request.process-a49d46300800d0ca(Request.java)
at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:254)
at org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:2162)
at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:2148)
at org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:1903)
at org.apache.commons.dbcp2.BasicDataSource$PaGetConnection.run(BasicDataSource.java:2267)
at org.apache.commons.dbcp2.BasicDataSource$PaGetConnection.run(BasicDataSource.java:2263)
at java.security.AccessController.doPrivileged(AccessController.java:63)
at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1404)
...

Tomcat JDBC连接池

...
Caused by: java.lang.SecurityException: Unable to get members for class org.apache.tomcat.jdbc.pool.DataSource

...

Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
... 45 more
Caused by: java.lang.NoClassDefFoundError: javax/management/MalformedObjectNameException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2517)
... 45 more
Caused by: …