我正在编写一个用于spark的Google大查询连接器,并在其下方使用google hadoop连接器。
目前google hadoop连接器需要一个指向creds json文件的Google env变量。
当您在数据交换世界之外启动集群时设置这可能很烦人
在代码中实时设置是不好的做法?或者是否有一种解决方法告诉hadoop连接器忽略env变量,因为它已在“fs.gs.auth.service.account.json.keyfile”hadoop配置中设置?
Dennis既然你是该项目的贡献者,也许你也可以帮忙吗?
答案 0 :(得分:0)
对于那些感兴趣的人,我只是在运行时使用scala中的下面的要点
设置它们https://gist.github.com/jaytaylor/770bc416f0dd5954cf0f
但是这里是代码以防gist永远离线
trait EnvHacker {
/**
* Portable method for setting env vars on both *nix and Windows.
* @see http://stackoverflow.com/a/7201825/293064
*/
def setEnv(newEnv: Map[String, String]): Unit = {
try {
val processEnvironmentClass = Class.forName("java.lang.ProcessEnvironment")
val theEnvironmentField = processEnvironmentClass.getDeclaredField("theEnvironment")
theEnvironmentField.setAccessible(true)
val env = theEnvironmentField.get(null).asInstanceOf[JavaMap[String, String]]
env.putAll(newEnv)
val theCaseInsensitiveEnvironmentField = processEnvironmentClass.getDeclaredField("theCaseInsensitiveEnvironment")
theCaseInsensitiveEnvironmentField.setAccessible(true)
val cienv = theCaseInsensitiveEnvironmentField.get(null).asInstanceOf[JavaMap[String, String]]
cienv.putAll(newEnv)
} catch {
case e: NoSuchFieldException =>
try {
val classes = classOf[Collections].getDeclaredClasses()
val env = System.getenv()
for (cl <- classes) {
if (cl.getName() == "java.util.Collections$UnmodifiableMap") {
val field = cl.getDeclaredField("m")
field.setAccessible(true)
val obj = field.get(env)
val map = obj.asInstanceOf[JavaMap[String, String]]
map.clear()
map.putAll(newEnv)
}
}
} catch {
case e2: Exception => e2.printStackTrace()
}
case e1: Exception => e1.printStackTrace()
}
}
}