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https://issues.apache.org/jira/browse/SPARK-20440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinayak Joshi updated SPARK-20440:
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Description:
It would be useful if users could do something like this without first invoking
{{sparkR.session()}}:
{code}
delayedAssign(".sparkRsession", { sparkR.session(..) },
assign.env=SparkR:::.sparkREnv)
{code}
This would help providers of interactive environments that bootstrap Spark for
their users but where, the user code need not always include SparkR. So the
possibility of lazy semantics for setting up a SparkSession/Context would be
very useful.
Note that SparkR API does not have a single entry object (such as Scala/Python
SparkSession classes) so it's the only env where such lazy setup is currently
difficult to achieve, so doing this enhancement will make it easier.
The changes required are minor and do not affect the external API or
functionality in any way. I will attach a PR with the changes needed for
consideration shortly.
was:
It would be useful if users could do something like this without first invoking
{{sparkR.session()}}:
{code}
delayedAssign(".sparkRsession", { sparkR.session(..) },
assign.env=SparkR:::.sparkREnv)
{code}
This would help providers of interactive environments that bootstrap Spark for
their users but the user code need not always include SparkR and so possibility
of lazy semantics for setting up a SparkSession/Context would be very useful.
Note that SparkR API does not have a single entry object (such as Scala/Python
SparkSession classes) so it's the only env where such lazy setup is currently
difficult to achieve, so doing this enhancement will make it easier.
The changes required are minor and do not affect the external API or
functionality in any way. I will attach a PR with the changes needed for
consideration shortly.
> Allow SparkR session and context to have delayed binding
> --------------------------------------------------------
>
> Key: SPARK-20440
> URL: https://issues.apache.org/jira/browse/SPARK-20440
> Project: Spark
> Issue Type: Improvement
> Components: SparkR
> Affects Versions: 2.1.0
> Reporter: Vinayak Joshi
>
> It would be useful if users could do something like this without first
> invoking {{sparkR.session()}}:
> {code}
> delayedAssign(".sparkRsession", { sparkR.session(..) },
> assign.env=SparkR:::.sparkREnv)
> {code}
> This would help providers of interactive environments that bootstrap Spark
> for their users but where, the user code need not always include SparkR. So
> the possibility of lazy semantics for setting up a SparkSession/Context would
> be very useful.
> Note that SparkR API does not have a single entry object (such as
> Scala/Python SparkSession classes) so it's the only env where such lazy setup
> is currently difficult to achieve, so doing this enhancement will make it
> easier.
> The changes required are minor and do not affect the external API or
> functionality in any way. I will attach a PR with the changes needed for
> consideration shortly.
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