>From SparkCodeStyleGuide https://cwiki.apache.org/confluence/display/SPARK/Spark+Code+Style+Guide#SparkCodeStyleGuide-Imports .
can find that import style as *Always import packages using absolute paths (e.g. scala.util.Random) instead of relative ones (e.g. util.Random). In addition, sort imports in the following order: - java.* and javax.* - scala.* - Third-party libraries (org.*, com.*, etc) - Project classes (org.apache.spark.*) * Some of the Spark code also not follow the above order for import Additionally it is better to include some additional style for import from http://twitter.github.io/effectivescala/#Formatting-Imports - *Use braces when importing several names from a package import import org.apache.flume.source.avro.{AvroSourceProtocol, AvroFlumeEvent, Staus}* - *Use wildcards when more than six names are imported import org.apache.flume.source.avro._ Don't apply this blindly: some packages export too many names* - *When using collections, qualify names by importing scala.collection.immutable and/or scala.collection.mutable Mutable and immutable collections have dual names. Qualifiying the names makes is obvious to the reader which variant is being used (e.g. "immutable.Map")* - *Do not use relative imports from other packages Avoid **import org.apache.flume.source.avro.AvroSourceProtocol **import AvroFlumeEvent **in favor of the unambiguous * *import org.apache.flume.source.avro.AvroFlumeEvent* * - Put imports at the top of the file The reader can refer to all imports in one place. * Post your thoughts. Regards, prabeesh On Thu, Mar 13, 2014 at 1:49 PM, prabeesh k <prabsma...@gmail.com> wrote: > example for unblocked import > > import org.eclipse.paho.client.mqttv3.MqttClient > import org.eclipse.paho.client.mqttv3.MqttClientPersistence > import org.eclipse.paho.client.mqttv3.MqttException > import org.eclipse.paho.client.mqttv3.MqttMessage > import org.eclipse.paho.client.mqttv3.MqttTopic > > this can also be represented using blocked method as follows > > import org.eclipse.paho.client.mqttv3.{MqttClient, MqttException, > MqttMessage, MqttTopic, MqttClientPersistence} > > > > > On Thu, Mar 13, 2014 at 1:39 PM, Prashant Sharma <scrapco...@gmail.com>wrote: > >> What exactly do you mean by blocked and unblocked import ? >> >> Prashant Sharma >> >> >> On Thu, Mar 13, 2014 at 1:32 PM, prabeesh k <prabsma...@gmail.com> wrote: >> >> > Hi All, >> > >> > We can import packages in Scala as blocked import and unblocked import. >> > >> > I think blocked import is better than other. This method helps to >> reduce >> > LOC. >> > >> > But in Spark code using mixed type, It is better choose any of both. >> > >> > Please post your thoughts on the Scala Style for import >> > >> > Regards, >> > prabeesh >> > >> > >
