Thanks again to everyone for their suggestions. Very enlightening.
David
On Oct 18, 2012, at 10:54 PM, Erik Hennum <erik.hen...@marklogic.com> wrote:
> Hi, David:
>
> As Damon points out, two-tier XQuery web apps are extraordinarily productive.
>
> If you want to do a 3-tier web app with JVM in the middle tier, you have lots
> of choices even
> in pure Java for going from the JSON or XML model to the webapp controller.
>
> To summarize some of the most typical:
>
> * If you don't have any pre-existing XML, you can use JAXB to roundtrip POJO
> tree structures to
> and from XML. JAXB is simple when the data structure design is sourced in
> Java instead of XML.
>
> * If you have pre-existing XML, you can use a tree API such as JDOM or XOM
> or a streaming
> API such as XStream.
>
> * If you have pre-existing JSON, you can use GSON or Jackson as a tree or
> streaming API.
>
> As you note, some JVM languages like Groovy and Scala have special facilities
> for structured
> markup. If those don't meet your requirements, the JVM language can still
> use the Java libraries
> above.
>
>
> Erik Hennum
>
> ________________________________________
> From: general-boun...@developer.marklogic.com
> [general-boun...@developer.marklogic.com] On Behalf Of Damon Feldman
> [damon.feld...@marklogic.com]
> Sent: Thursday, October 18, 2012 7:08 PM
> To: MarkLogic Developer Discussion
> Subject: Re: [MarkLogic Dev General] Scala and XCC
>
> David,
>
> I think that's where you're going to develop new ideas. I would do it in a
> view layer inside MarkLogic - renderEmployees.xqy or something like this:
>
> let $employees :=
> <employees>
> <employee>
> <name id="1234">
> <first>Bob</first>
> <last>Smith</last>
> <address>
> <street>1234 Oak St.</street>
> <city>San Diego</city>
> <state>CA</state>
> </address>
> </name>
> </employee>
> <employee>
> <name id="2345">
> <first>Sally</first>
> <last>Smith</last>
> <address>
> <street>1234 Elm St.</street>
> <city>Los Angeles</city>
> <state>CA</state>
> </address>
> </name>
> </employee>
> </employees>
> for $e in $employees/employee
> return xdmp:document-insert(concat("/employee/",
> $e/name/@id/string<mailto:$e/name/@id/string>()), $e)
> ; (: transaction end. start new tx :)
> <html>
> <body>
> <table border="1">
> {
> for $e in /employee
> return
> <tr><td>{concat($e/name/first, " ",
> $e/name/last)}</td><td>{$e//state/text()}</td></tr>
> }
> </table>
> </body>
> </html>
>
> Or you could send XML right to a smart table widget in the browser, or send
> JSON via the json libraries. But you may find a better way to use Scala too.
>
> Yours,
> Damon
>
> ________________________________
> From: general-boun...@developer.marklogic.com
> [general-boun...@developer.marklogic.com] On Behalf Of David Sargeant
> [da...@dsargeant.com]
> Sent: Thursday, October 18, 2012 9:40 PM
> To: MarkLogic Developer Discussion
> Subject: Re: [MarkLogic Dev General] Scala and XCC
>
> How would you normally process a nested xml structure after retrieving it?
> Or would you transform in MarkLogic first? For example, let's say I had the
> following stored in the db and wanted to display it on a web page. I'm using
> an MVC architecture, so the HTML for my view is already defined, and I just
> want to iterate over the nested structure.
>
> <employees>
> <empolyee>
> <name id="1234">
> <first>Bob</first>
> <last>Smith</last>
> <address>
> <street>1234 Oak St.</street>
> <city>San Diego</city>
> <state>CA</state>
> </address>
> </name>
> </employee>
> <empolyee>
> <name id="2345">
> <first>Sally</first>
> <last>Smith</last>
> <address>
> <street>1234 Elm St.</street>
> <city>Los Angeles</city>
> <state>CA</state>
> </address>
> </name>
> </employee>
> </employees>
>
> On Oct 18, 2012, at 7:40 PM, Damon Feldman
> <damon.feld...@marklogic.com<mailto:damon.feld...@marklogic.com>> wrote:
>
> David,
>
>
>
> I like how you are thinking - why not have good XML support all the way
> through the stack? You should be able to do more in Scala than in Java, since
> Java's XML handling is so painful.
>
>
>
> I think your division of work between XQuery/XSLT in the MarkLogic Server and
> Scala processing may depend on speed and data volumes. If the operation is
> going to turn a lot of data into a little data, or do heavy processing, do it
> in MarkLogic.
>
> E.g. if you want the SSNs of all the People named Bob you could have Scala
> invoke
>
> /Person
>
> in MarkLogic and filter out everyone other than Bob, then throw away all data
> but the SSN. Or you could invoke
>
> /Person[name="Bob"]
>
> in MarkLogic and use Scala to pull the SSN from the resulting full XML
> doc(s). More interesting is only moving the SSN to minimize serialization,
> parsing, GC and network traffic. Do this in MarkLogic:
>
> /Person[name="Bob"]//ssn.text()
>
> and just use the resulting string in Scala. If you do return XML, I suspect
> Scala's XML parsing (scala.xml.pull.Source ?) will parse it to the Scala mode
> most efficiently.
>
> Damon
>
>
>
> --
> Damon Feldman,
> Sr. Principal Consultant, MarkLogic
>
> ________________________________________
> From:
> general-boun...@developer.marklogic.com<mailto:general-boun...@developer.marklogic.com>
>
> [general-boun...@developer.marklogic.com<mailto:general-boun...@developer.marklogic.com>]
> On Behalf Of David Lee
> [david....@marklogic.com<mailto:david....@marklogic.com>]
> Sent: Thursday, October 18, 2012 4:09 PM
> To: MarkLogic Developer Discussion
> Subject: Re: [MarkLogic Dev General] Scala and XCC
>
> First off, are there other things you are doing that need Scala ?
> I think you will find the XQuery support native to MarkLogic to be vastly
> better then the XML support in Scala,
> easier to use and more efficient.
>
> But supposing you do need or want scala. Our latest MarkLogic 6.0 has a new
> Java API
> I belive Scala runs in the Java JVM and can call Java directly ?
> If so this may be what you are looking for
> http://developer.marklogic.com/products/java
>
> Also you can call MarkLogic using a REST (plain old HTTP) request and get
> back XML which you can then (hopefully) get Scala to parse and turn into a
> Scala XML element.
>
>
>
> -----------------------------------------------------------------------------
> David Lee
> Lead Engineer
> MarkLogic Corporation
> d...@marklogic.com<mailto:d...@marklogic.com>
> Phone: +1 812-482-5224
> Cell: +1 812-630-7622
> www.marklogic.com<http://www.marklogic.com>
>
>
>
> -----Original Message-----
> From:
> general-boun...@developer.marklogic.com<mailto:general-boun...@developer.marklogic.com>
>
> [mailto:general-boun...@developer.marklogic.com<mailto:boun...@developer.marklogic.com>]
> On Behalf Of David Sargeant
> Sent: Thursday, October 18, 2012 4:04 PM
> To: MarkLogic Developer Discussion
> Subject: Re: [MarkLogic Dev General] Scala and XCC
>
> In Scala I can do the following (examples from a REPL session):
>
> scala> val david =
> <person><name>David</name><occupation>developer</occupation></person>
> david: scala.xml.Elem =
> <person><name>David</name><occupation>developer</occupation></person>
>
> scala> (david \ "name").text
> res3: String = David
>
> I'm wondering how to query MarkLogic using XCC and transform the results into
> a scala.xml.Elem object so I can easily query the xml or map over it. See
> the following slides for some more things you can do with xml in Scala -
> http://www.dzone.com/links/r/xml_processing_in_scala.html.
>
>
> David
>
> On Oct 18, 2012, at 3:28 PM, David Lee
> <david....@marklogic.com<mailto:david....@marklogic.com>> wrote:
>
>> To help answer you, could you provide details ?
>> What are your goals for "builtin xml processing in scala" and how does this
>> relate to your intended use of MarkLogic ?
>>
>>
>> -----------------------------------------------------------------------------
>> David Lee
>> Lead Engineer
>> MarkLogic Corporation
>> d...@marklogic.com<mailto:d...@marklogic.com>
>> Phone: +1 812-482-5224
>> Cell: +1 812-630-7622
>> www.marklogic.com<http://www.marklogic.com>
>>
>>
>>
>> -----Original Message-----
>> From:
>> general-boun...@developer.marklogic.com<mailto:general-boun...@developer.marklogic.com>
>>
>> [mailto:general-boun...@developer.marklogic.com<mailto:boun...@developer.marklogic.com>]
>> On Behalf Of David Sargeant
>> Sent: Thursday, October 18, 2012 3:19 PM
>> To: General MarkLogic Developer Discussion
>> Subject: [MarkLogic Dev General] Scala and XCC
>>
>> I'm farily new to the world of Java/Scala and MarkLogic, so forgive me if
>> the question seems trivial. I'm wondering what the best way is to use
>> MarkLogic and Scala so that I can take advantage of the built-in xml
>> processing capabilities of Scala? Thanks.
>>
>>
>> David
>> _______________________________________________
>> General mailing list
>> General@developer.marklogic.com<mailto:General@developer.marklogic.com>
>> http://developer.marklogic.com/mailman/listinfo/general
>> _______________________________________________
>> General mailing list
>> General@developer.marklogic.com<mailto:General@developer.marklogic.com>
>> http://developer.marklogic.com/mailman/listinfo/general
>
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> General mailing list
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