RE: XMLBeans performance and source code status [Re: Proposal: XMLBeans]
When working with XMLBeans in a strongly typed way (with a Schema), individual objects are created for each piece of information, usually instances of simple and complex Schema types. However, you can also access and manipulate the XML in a typeless manor. What we've done with XMLBeans is provided access to the full XML Infoset via the XmlCursor interface. XmlCursor provides functionality very similar to the DOM, but takes a very different tact. Instead of creating an DOM Node for each element, attribute, text, etc, one may create a single XmlCursor and navigate that cursor about the XML instance, interrogating the XML: element/attr names, child/parent elements, text, comments, etc. Also, one may modify the XML by removing elements and attrs, inserting text, for example. All of this can be done by either not creating objects or reusing objects so that the number of objects needed to operate on the XML is constant, not on the order of the size of the XML like a DOM would require. The kind of interface allows an implementer of an in memory XML store more freedom to implement the internal structure which represents the XML in memory. One, for example, could simply store the XML as it was, for example, read in from disk and implement a cursor as an index into that string, parsing or modifying the parts of the string as necessary to satisfy the requests. We don't go to quite this extreme. In principle, we create one object for every leaf element or attribute and two objects for every interior element. All text for attribute values, comments, procinst's and text between element markup is stored in a single character array. We have found that creating fewer objects and batching text leads to loading the XML into memory faster as well as having a similar, if not slightly smaller, memory footprint when compared to the DOM. Also, working with cursors seems to be an easier programming model than the DOM as it does not have text nodes and is more intuitive. With respect to the synchronized access, the strongly typed schema XMLBeans objects cache values so that conversion to text does not occur until it is needed. Likewise, when modifications are made to the XML Infoset, the strongly typed data (ints, for example) are not parsed from the text until requested. In general the impact of synchronization is quite low because of the lazy approach we have taken along with the caching. As I read your question again, I realize that you may have interpreted synchronized to mean "managing data among several threads". The synchronization described refers to the fact that one may manipulate the XML via the XmlCursor or the strongly typed XMLBean classes generated from the schema, each mechanism capable of seeing the changes from the other in a tightly integrated way. With respect to building XMLBeans, we plan to remove any dependency upon the jars you mentioned. Indeed, there exists very little dependence on these. Mostly just interfaces, not any classes needed for the implementation. - Eric Vasilik -Original Message- From: Aleksander Slominski [mailto:[EMAIL PROTECTED] Sent: Friday, July 04, 2003 8:31 PM To: [EMAIL PROTECTED] Cc: Jakarta General List; [EMAIL PROTECTED] Subject: XMLBeans performance and source code status [Re: Proposal: XMLBeans] Cliff Schmidt wrote: >>What's compelling about XMLBeans compared to some of the other front >>runners, such as JDOM and XOM, Castor and JAXB? >> >> > >The main difference between XMLBeans and JDOM or XOM is that XMLBeans >does not create objects for each XML information item. Instead, it >provides cursor-based access to each item in the XML Infoset. It has >an architecture where, if an actual object is needed for a node, it >can be created on-demand. We found this provided great performance >benefit. > hi, i am interested to find if you have some more details on performance benefits - it seems to be very intriguing and distinguishing feature of XMLBeans. i may be missing something but i tried to find this information online without any lack (i checked http://dev2dev.bea.com/articles/hitesh_seth.jsp that is good overview but has not enough technical details and other docs): as far as i can understand actual objects are created for every XML information item? so as objects are in memory the same way as objects in DOM what performance benefits do you have in mind? do you refer to faster creation time or lower memory footprint? did you check for example on the same machine how big XML document can be loaded with XMLBeans and DOM (for example Xerces2) before running out of memory? >The biggest differences between XMLBeans and Castor or JAXB >are: >1) the goal of 100% Schema support (currently supports everything in >Schema other than redefine and substitution groups, and those features >are nearly ready), and >2) the integrated and synchronized access of the underlying XML content >with strongly typed
Re: [i18n] Internationalization subproject sponsor?
>From the proposal I was not able to determine *what it intends to do*.. Besides that, the criteria for helping is IMHO a bit discouraging. Granted its hard to help if you've never been outside of Kansas, but maybe Dorothy darn tootin cares about i18n and wants to make sure that toto can use her application... Perhaps there is something left for her to do even if she only speaks 'merican. -Andy On 7/5/03 12:16 AM, "Tetsuya Kitahata" <[EMAIL PROTECTED]> wrote: > Hello, Robert, > > > Personally, I am interested in this project, but I am not a *member* > in ASF. (Just a *committer* in jakarta) > How about posting your message to > [EMAIL PROTECTED] > ?? > (subscribe: [EMAIL PROTECTED]) > Maybe, you can find the ASF *member* outside of jakarta. > > Here's a list of the number of *committer* and *member* in ASF umbrella > ( Originally created by Steven Noels) > -- > > Amount of committers: 677 > > "Name","committers","members" > "ant","34","8" > "apr","42","32" > "avalon","80","15" > "cocoon","60","14" > "commons","10","10" > "db","35","9" > "embperl","13","6" > "httpd","145","111" > "incubator","26","12" > "jakarta","314","35" > "james","13","3" > "java","7","1" > "maven","25","4" > "mod_dtcl","9","4" > "modperl","18","7" > "tcl","9","4" > "ws","86","11" > "xml","259","28" > -- > > > There are only 35 potential "Mentor"s (I mean, sponsors) in jakarta, as > you can see. If you are confident you can build a powerful community, > IMHO you do not have to stick to seek the Mentor in jakarta. > > I hope this mail might help you to some extent. > > Sincerely, > > -- Tetsuya ([EMAIL PROTECTED]) > > - > > On 3 Jul 2003 15:23:10 - > (Subject: [i18n] Internationalization subproject sponsor?) > Robert Simpson <[EMAIL PROTECTED]> wrote: > >> To current members of the Jakarta project: >> >> Is there any current member of the Jakarta project who would be interested in >> sponsoring the entry of the Internationalization subproject into the >> incubator? >> >> The Internationalization subproject would be somewhat different than the >> other Jakarta projects in that there would be two types of contributors: >> >>1. the (traditional) code contributors >>2. the language translation contributors >> >> So far, the reponses I have received regarding people would would be >> interested >> in contributing have all been outside Jakarta - mostly language translators. >> Since the Internationalization subproject would most likely fit into the >> Jakarta project, it would help to have a sponsor from within Jakarta, per the >> "Incubation Process" documentation. >> >> The subproject proposal and initial code contribution can be found earlier in >> the Jakarta General mailing list, or here: >> http://www.itoolset.com/i18n/PROPOSAL.html >> >> Without a sponsor, I will probably move the code that was extracted in >> preparation for submission to Apache back into the iToolSet package hierarchy >> and let it pass as an Apache contribution until there is more interest in a >> common Internationalization architecture within Apache itself. >> >> Thanks in advance. >> Robert Simpson >> >> >> - >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] > > - > Tetsuya Kitahata -- Terra-International, Inc. > E-mail: [EMAIL PROTECTED] : [EMAIL PROTECTED] > http://www.terra-intl.com/ > (Apache Jakarta Translation, Japanese) > http://jakarta.terra-intl.com/ > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > -- Andrew C. Oliver http://www.superlinksoftware.com/poi.jsp Custom enhancements and Commercial Implementation for Jakarta POI http://jakarta.apache.org/poi For Java and Excel, Got POI? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
cvs commit: jakarta-site2/xdocs/site cvsindex.xml
tetsuya 2003/07/05 01:19:45 Modified:docs/site cvsindex.html xdocs/site cvsindex.xml Log: CVSINDEX: pigeonholed the jakarta-related-projects Revision ChangesPath 1.96 +23 -4 jakarta-site2/docs/site/cvsindex.html Index: cvsindex.html === RCS file: /home/cvs/jakarta-site2/docs/site/cvsindex.html,v retrieving revision 1.95 retrieving revision 1.96 diff -u -r1.95 -r1.96 --- cvsindex.html 8 Jun 2003 04:05:09 - 1.95 +++ cvsindex.html 5 Jul 2003 08:19:45 - 1.96 @@ -274,8 +274,6 @@ jakarta-ecs2 http://cvs.apache.org/viewcvs/jakarta-gump/";> jakarta-gump -http://cvs.apache.org/viewcvs/jakarta-james/";> -jakarta-james http://cvs.apache.org/viewcvs/jakarta-jetspeed/";> jakarta-jetspeed http://cvs.apache.org/viewcvs/jakarta-jmeter/";> @@ -288,8 +286,6 @@ jakarta-lucene http://cvs.apache.org/viewcvs/jakarta-lucene-sandbox/";> jakarta-lucene-sandbox -http://cvs.apache.org/viewcvs/jakarta-ojb/";> -jakarta-ojb http://cvs.apache.org/viewcvs/jakarta-oro/";> jakarta-oro http://cvs.apache.org/viewcvs/jakarta-poi/";> @@ -355,6 +351,29 @@ jakarta-watchdog http://cvs.apache.org/viewcvs/jakarta-watchdog-4.0/";> jakarta-watchdog-4.0 + +Modules for the Jakarta-Related Projects + +http://cvs.apache.org/viewcvs/ant/";> +ant +http://cvs.apache.org/viewcvs/ant-antidote/";> +ant-antidote +http://cvs.apache.org/viewcvs/avalon/";> +avalon +http://cvs.apache.org/viewcvs/avalon-site/";> +avalon-site +http://cvs.apache.org/viewcvs/db-ojb/";> +db-ojb +http://cvs.apache.org/viewcvs/db-torque/";> +db-torque +http://cvs.apache.org/viewcvs/db-site/";> +db-site +http://cvs.apache.org/viewcvs/james-server/";> +james-server +http://cvs.apache.org/viewcvs/james-site/";> +james-site +http://cvs.apache.org/viewcvs/maven/";> +maven Modules for the older Java Apache Projects 1.45 +25 -4 jakarta-site2/xdocs/site/cvsindex.xml Index: cvsindex.xml === RCS file: /home/cvs/jakarta-site2/xdocs/site/cvsindex.xml,v retrieving revision 1.44 retrieving revision 1.45 diff -u -r1.44 -r1.45 --- cvsindex.xml 23 Apr 2003 21:40:58 - 1.44 +++ cvsindex.xml 5 Jul 2003 08:19:45 - 1.45 @@ -66,8 +66,6 @@ jakarta-ecs2 http://cvs.apache.org/viewcvs/jakarta-gump/";> jakarta-gump -http://cvs.apache.org/viewcvs/jakarta-james/";> -jakarta-james http://cvs.apache.org/viewcvs/jakarta-jetspeed/";> jakarta-jetspeed http://cvs.apache.org/viewcvs/jakarta-jmeter/";> @@ -80,8 +78,6 @@ jakarta-lucene http://cvs.apache.org/viewcvs/jakarta-lucene-sandbox/";> jakarta-lucene-sandbox -http://cvs.apache.org/viewcvs/jakarta-ojb/";> -jakarta-ojb http://cvs.apache.org/viewcvs/jakarta-oro/";> jakarta-oro http://cvs.apache.org/viewcvs/jakarta-poi/";> @@ -147,6 +143,31 @@ jakarta-watchdog http://cvs.apache.org/viewcvs/jakarta-watchdog-4.0/";> jakarta-watchdog-4.0 + + +Modules for the Jakarta-Related Projects + + +http://cvs.apache.org/viewcvs/ant/";> +ant +http://cvs.apache.org/viewcvs/ant-antidote/";> +ant-antidote +http://cvs.apache.org/viewcvs/avalon/";> +avalon +http://cvs.apache.org/viewcvs/avalon-site/";> +avalon-site +http://cvs.apache.org/viewcvs/db-ojb/";> +db-ojb +http://cvs.apache.org/viewcvs/db-torque/";> +db-torque +http://cvs.apache.org/viewcvs/db-site/";> +db-site +http://cvs.apache.org/viewcvs/james-server/";> +james-server +http://cvs.apache.org/viewcvs/james-site/";> +james-site +http://cvs.apache.org/viewcvs/maven/";> +maven Modules for the older Java Apache Projects - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
cvs commit: jakarta-site2/xdocs/site binindex.xml
tetsuya 2003/07/05 00:54:49 Modified:docs/site binindex.html xdocs/site binindex.xml Log: Binary Download: Velocity 1.3 -> Velocity 1.3.1 Revision ChangesPath 1.308 +1 -2 jakarta-site2/docs/site/binindex.html Index: binindex.html === RCS file: /home/cvs/jakarta-site2/docs/site/binindex.html,v retrieving revision 1.307 retrieving revision 1.308 diff -u -r1.307 -r1.308 --- binindex.html 2 Jul 2003 02:13:31 - 1.307 +++ binindex.html 5 Jul 2003 07:54:49 - 1.308 @@ -319,7 +319,7 @@ http://www.apache.org/dist/jakarta/jakarta-tomcat-4.0/release/v4.1.24/";>Tomcat 4.1.24 http://www.apache.org/dist/jakarta/jakarta-turbine/turbine-2/release/2.2/";>Turbine 2.2 http://www.apache.org/dist/jakarta/jakarta-turbine/torque/release/3.0/";>Turbine Torque 3.0 -http://www.apache.org/dist/jakarta/jakarta-velocity/release/v1.3/";>Velocity 1.3 +http://www.apache.org/dist/jakarta/jakarta-velocity/release/v1.3.1/";>Velocity 1.3.1 @@ -340,7 +340,6 @@ http://jakarta.apache.org/builds/jakarta-poi/dev/bin/";>POI 1.10-dev (early 2.0 development build) http://www.apache.org/dist/jakarta/tapestry/binaries/3.0-beta-1a/";>Tapestry 3.0-beta-1a http://www.apache.org/dist/jakarta/jakarta-tomcat/release/v5.0.3-alpha/";>Tomcat 5.0.3 Alpha -http://www.apache.org/dist/jakarta/jakarta-velocity/release/v1.3/";>Velocity 1.3-rc1 1.260 +1 -2 jakarta-site2/xdocs/site/binindex.xml Index: binindex.xml === RCS file: /home/cvs/jakarta-site2/xdocs/site/binindex.xml,v retrieving revision 1.259 retrieving revision 1.260 diff -u -r1.259 -r1.260 --- binindex.xml 2 Jul 2003 02:13:32 - 1.259 +++ binindex.xml 5 Jul 2003 07:54:49 - 1.260 @@ -162,7 +162,7 @@ http://www.apache.org/dist/jakarta/jakarta-tomcat-4.0/release/v4.1.24/";>Tomcat 4.1.24 http://www.apache.org/dist/jakarta/jakarta-turbine/turbine-2/release/2.2/";>Turbine 2.2 http://www.apache.org/dist/jakarta/jakarta-turbine/torque/release/3.0/";>Turbine Torque 3.0 -http://www.apache.org/dist/jakarta/jakarta-velocity/release/v1.3/";>Velocity 1.3 +http://www.apache.org/dist/jakarta/jakarta-velocity/release/v1.3.1/";>Velocity 1.3.1 @@ -175,7 +175,6 @@ http://jakarta.apache.org/builds/jakarta-poi/dev/bin/";>POI 1.10-dev (early 2.0 development build) http://www.apache.org/dist/jakarta/tapestry/binaries/3.0-beta-1a/";>Tapestry 3.0-beta-1a http://www.apache.org/dist/jakarta/jakarta-tomcat/release/v5.0.3-alpha/";>Tomcat 5.0.3 Alpha -http://www.apache.org/dist/jakarta/jakarta-velocity/release/v1.3/";>Velocity 1.3-rc1 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
cvs commit: jakarta-site2/xdocs/site mail2.xml
tetsuya 2003/07/05 00:37:07 Modified:docs/site mail2.html xdocs/site mail2.xml Log: Mailing List: Turbine Torque -> The Apache DB/Torque Revision ChangesPath 1.113 +23 -23jakarta-site2/docs/site/mail2.html Index: mail2.html === RCS file: /home/cvs/jakarta-site2/docs/site/mail2.html,v retrieving revision 1.112 retrieving revision 1.113 diff -u -r1.112 -r1.113 --- mail2.html4 Jul 2003 16:22:57 - 1.112 +++ mail2.html5 Jul 2003 07:37:07 - 1.113 @@ -545,10 +545,10 @@ The James Developer/User List James mailing lists have moved, [EMAIL PROTECTED] (for users of James) is now [EMAIL PROTECTED] subscribe with [EMAIL PROTECTED] [EMAIL PROTECTED] (for users of James) is now [EMAIL PROTECTED] subscribe with [EMAIL PROTECTED] [EMAIL PROTECTED] (for developers and contributors) is now [EMAIL PROTECTED] subscribe with [EMAIL PROTECTED] There is also [EMAIL PROTECTED] for general discussions relating to the project (not code or user issues) subscribe with [EMAIL PROTECTED] -For more information, see the http://james.apache.org/";>Apache James website. +For more information, see the http://james.apache.org/";>Apache James Project website. @@ -1178,27 +1178,6 @@ This list is where discussion of the Turbine TDK development occurs. -The Torque User List -Medium Traffic -mailto:[EMAIL PROTECTED]">Subscribe -mailto:[EMAIL PROTECTED]">Unsubscribe -http://www.mail-archive.com/[EMAIL PROTECTED]/">Archive - - -List for Torque users to meet, discuss and solve problems. -Developers will also be lurking around. - - -The Torque Developer List -Medium Traffic -mailto:[EMAIL PROTECTED]">Subscribe -mailto:[EMAIL PROTECTED]">Unsubscribe -http://www.mail-archive.com/[EMAIL PROTECTED]/">Archive - - -This list is where discussion of Torque development occurs. - - The JCS User List Medium Traffic mailto:[EMAIL PROTECTED]">Subscribe @@ -1218,6 +1197,27 @@ This list is where discussion of JCS development occurs. + + +The Torque (DB) User List +Medium Traffic +mailto:[EMAIL PROTECTED]">Subscribe +mailto:[EMAIL PROTECTED]">Unsubscribe +http://www.mail-archive.com/[EMAIL PROTECTED]/">Archive + + +List for Torque users to meet, discuss and solve problems. +Developers will also be lurking around. Note: Torque is now under http://db.apache.org/";>Apache DB Project. + + +The Torque (DB) Developer List +Medium Traffic +mailto:[EMAIL PROTECTED]">Subscribe +mailto:[EMAIL PROTECTED]">Unsubscribe +http://www.mail-archive.com/[EMAIL PROTECTED]/">Archive + + +This list is where discussion of Torque development occurs. Note: Torque is now under http://db.apache.org/";>Apache DB Project. 1.69 +23 -23jakarta-site2/xdocs/site/mail2.xml Index: mail2.xml === RCS file: /home/cvs/jakarta-site2/xdocs/site/mail2.xml,v retrieving revision 1.68 retrieving revision 1.69 diff -u -r1.68 -r1.69 --- mail2.xml 4 Jul 2003 16:22:58 - 1.68 +++ mail2.xml 5 Jul 2003 07:37:07 - 1.69 @@ -312,10 +312,10 @@ The James Developer/User List James mailing lists have moved, [EMAIL PROTECTED] (for users of James) is now [EMAIL PROTECTED] subscribe with [EMAIL PROTECTED] [EMAIL PROTECTED] (for users of James) is now [EMAIL PROTECTED] subscribe with [EMAIL PROTECTED] [EMAIL PROTECTED] (for developers and contributors) is now [EMAIL PROTECTED] subscribe with [EMAIL PROTECTED] There is also [EMAIL PROTECTED] for general discussions relating to the project (not code or user issues) subscribe with [EMAIL PROTECTED] -For more information, see the http://james.apache.org/";>Apache James website. +For more information, see the http://james.apache.org/";>Apache James Project website. @@ -796,27 +796,6 @@ This list is where discussion of the Turbine TDK development occurs. -The Torque User List -Medium Traffic -mailto:[EMAIL PROTECTED]">Subscribe -mailto:[EMAIL PROTECTED]">Unsubscribe -http://www.mail-archive.com/[EMAIL PROTECTED]/">Archive - - -List for Torque
