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Posted to dev@iotdb.apache.org by Willem Jiang <wi...@gmail.com> on 2018/12/01 12:51:47 UTC
Re: Welcome to the IoTDB project
Hi,
My name is Willem, my Chinese name is 姜宁. I join the ASF since 2006 as
initial committer (just like most of you) of CXF. Then I joined the
development of Apache ActiveMQ, Apache Camel, Apache ServiceMix. Now
I'm working for Huawei and leading the project Apache SerivceComb. As
IPMC member I had chance to mentor several Apache Podling projects
which were started from China. Now I'm happy to be the mentor of
iotdb, and I will work closely with you (as I'm based in Beijing).
Please don't hesitate to ask if you have any questions about
incubating.
I know most of developer may not get use to use mailing list for
discussion. So I wrote some blogs[1][2] to talk about it when
mentoring the RocketMQ. Please take a look let me know what you think.
[1]https://willemjiang.github.io/blog/2016/why-we-use-mailing-list/
[2]https://willemjiang.github.io/blog/2016/opensource-code-of-conduct/
Willem Jiang
Twitter: willemjiang
Weibo: 姜宁willem
On Fri, Nov 30, 2018 at 10:34 PM 李天安 <lt...@mails.tsinghua.edu.cn> wrote:
>
> Hello, all,
>
>
> I'm Tianan Li, it’s my first year of being a master student in School of Software at Tsinghua University. I used to take part in the development of postback model, which is used to transmit data from end to cloud.
>
> It's my great honor to participate in such an awesome project and I hope to make more contributions for IoTDB.
>
>
> Best Regards,
> —————————————————
> Tianan Li
> School of Software, Tsinghua University
>
> > 在 2018年11月30日，上午5:43，Justin Mclean <ju...@classsoftware.com> 写道：
> >
> > Hi,
> >
> > I’m Justin and I volunteered to be a mentor for this project and help out where needed. So if you need any help or have any questions, in particular about how the ASF works, please ask on this list.
> >
> > I’ve been involved in the ASF for a while now and mentor and help out on a few projects, several of them in the IoT space. I’m currently the V.P of the Apache incubator and of Apache Mynewt. I’ve been involved in number of commercial IoT projects (and scada systems) and I’m a electronics hobbyist. I run the IoT meetup in Sydney Australia, speak at conferences and run the occasional workshop. I’m a freelance developer and teacher and currently split my time between the two, teaching at an online college / being a casual academic at university and working as a developer or consultant on several projects.
> >
> > Thanks,
> > Justin
>
AW: Welcome to the IoTDB project
Posted by Julian Feinauer <j....@pragmaticminds.de>.
Hi,
I have to check the calcite code to see whether remarks are passed via the Meta or not. Generally your implementation of the table interface should provide its meta data via the present abstract functions.
Can you give a mwe or a link to a branch, then I could check.
Julian
Von meinem Mobiltelefon gesendet
-------- Ursprüngliche Nachricht --------
Betreff: Re: Welcome to the IoTDB project
Von: 勾王敏浩
An: dev@iotdb.apache.org
Cc: dev@iotdb.apache.org
Hi,
Currently we face a problem,when we use calcite connection to get the comment of the table,the "REMARK" of table is returned with "null".
I wonder whether we can get table comment or column comment using calcite.
[cid:77efa623$1$169415a20e9$Coremail$gwmh18$mails.tsinghua.edu.cn]
Thank you
<https://maas.mail.163.com/dashi-web-extend/html/proSignature.html?ftlId=3&name=gwmh18&uid=gwmh18%40mails.tsinghua.edu.cn&iconUrl=https%3A%2F%2Fmail-online.nosdn.127.net%2Fwzpmmc%2F8f50f1e94050373bafd9ccdb4491b047.jpg&company=%E5%A4%A7%E6%95%B0%E6%8D%AE%E5%B7%A5%E7%A8%8B%E5%9B%BD%E5%AE%B6%E5%AE%9E%E9%AA%8C%E5%AE%A4&items=%5B%22gwmh18%40mails.tsinghua.edu.cn%22%5D&logoUrl=https%3A%2F%2Fmail-online.nosdn.127.net%2Fqiyeicon%2F56df7a374dbc375497f66a92d65a584d.png>
[https://mail-online.nosdn.127.net/wzpmmc/8f50f1e94050373bafd9ccdb4491b047.jpg]
gwmh18
大数据工程国家实验室
gwmh18@mails.tsinghua.edu.cn
签名由 网易邮箱大师<https://mail.163.com/dashi/dlpro.html?from=mail81> 定制
On 12/3/2018 05:32，Julian Feinauer<jf...@apache.org> wrote：
Hi,
my name is Julian Feinauer and I come from Apache Calcite, Edgent and PLC4X. My interest is mostly in time series processing at the edge. In my daytime job I work for two companies called pragmatic minds and pragmatic industries which we founded nearly 3 years ago in South Germany.
I love the idea behind iotDB as it is realy the materialization of many of my thoughts about what we really need for efficient storage of ts data.
I would love to get my hands dirty on the query and filter api and perhaps even write a small Calcite Adapter, when I find some time in the next weeks.
We have many "IoT" projects with practical use cases in the industry so I'll try to bring my perspective in as best as possible.
Best
Julian
On 2018/12/01 12:51:47, Willem Jiang <wi...@gmail.com> wrote:
Hi,
My name is Willem, my Chinese name is 姜宁. I join the ASF since 2006 as
initial committer (just like most of you) of CXF. Then I joined the
development of Apache ActiveMQ, Apache Camel, Apache ServiceMix. Now
I'm working for Huawei and leading the project Apache SerivceComb. As
IPMC member I had chance to mentor several Apache Podling projects
which were started from China. Now I'm happy to be the mentor of
iotdb, and I will work closely with you (as I'm based in Beijing).
Please don't hesitate to ask if you have any questions about
incubating.
I know most of developer may not get use to use mailing list for
discussion. So I wrote some blogs[1][2] to talk about it when
mentoring the RocketMQ. Please take a look let me know what you think.
[1]https://willemjiang.github.io/blog/2016/why-we-use-mailing-list/
[2]https://willemjiang.github.io/blog/2016/opensource-code-of-conduct/
Willem Jiang
Twitter: willemjiang
Weibo: 姜宁willem
On Fri, Nov 30, 2018 at 10:34 PM 李天安 <lt...@mails.tsinghua.edu.cn> wrote:
Hello, all,
I'm Tianan Li, it’s my first year of being a master student in School of Software at Tsinghua University. I used to take part in the development of postback model, which is used to transmit data from end to cloud.
It's my great honor to participate in such an awesome project and I hope to make more contributions for IoTDB.
Best Regards,
―――――――――――――――――
Tianan Li
School of Software, Tsinghua University
在 2018年11月30日，上午5:43，Justin Mclean <ju...@classsoftware.com> 写道：
Hi,
I’m Justin and I volunteered to be a mentor for this project and help out where needed. So if you need any help or have any questions, in particular about how the ASF works, please ask on this list.
I’ve been involved in the ASF for a while now and mentor and help out on a few projects, several of them in the IoT space. I’m currently the V.P of the Apache incubator and of Apache Mynewt. I’ve been involved in number of commercial IoT projects (and scada systems) and I’m a electronics hobbyist. I run the IoT meetup in Sydney Australia, speak at conferences and run the occasional workshop. I’m a freelance developer and teacher and currently split my time between the two, teaching at an online college / being a casual academic at university and working as a developer or consultant on several projects.
Thanks,
Justin
Re: Welcome to the IoTDB project
Posted by Xiangdong Huang <sa...@gmail.com>.
Hi,
It seems that figures are not accepted for mailing list.
By the way, are you working on integrate IoTDB with Calcite? If so, why not
post your mail on `Integrate Calcite in IoTDB` thread or a new
thread/subject...
Best,
-----------------------------------
Xiangdong Huang
School of Software, Tsinghua University
黄向东
清华大学 软件学院
勾王敏浩 <gw...@mails.tsinghua.edu.cn> 于2019年3月3日周日 上午10:20写道：
>
> Hi,
> Currently we face a problem,when we use calcite connection to get the
> comment of the table,the "REMARK" of table is returned with "null".
>
> I wonder whether we can get table comment or column comment using
> calcite.
>
>
> Thank you
> gwmh18
> 大数据工程国家实验室
> gwmh18@mails.tsinghua.edu.cn
>
> <https://maas.mail.163.com/dashi-web-extend/html/proSignature.html?ftlId=3&name=gwmh18&uid=gwmh18%40mails.tsinghua.edu.cn&iconUrl=https%3A%2F%2Fmail-online.nosdn.127.net%2Fwzpmmc%2F8f50f1e94050373bafd9ccdb4491b047.jpg&company=%E5%A4%A7%E6%95%B0%E6%8D%AE%E5%B7%A5%E7%A8%8B%E5%9B%BD%E5%AE%B6%E5%AE%9E%E9%AA%8C%E5%AE%A4&items=%5B%22gwmh18%40mails.tsinghua.edu.cn%22%5D&logoUrl=https%3A%2F%2Fmail-online.nosdn.127.net%2Fqiyeicon%2F56df7a374dbc375497f66a92d65a584d.png>
> 签名由 网易邮箱大师 <https://mail.163.com/dashi/dlpro.html?from=mail81> 定制
>
> On 12/3/2018 05:32，Julian Feinauer<jf...@apache.org>
> <jf...@apache.org> wrote：
>
> Hi,
>
> my name is Julian Feinauer and I come from Apache Calcite, Edgent and
> PLC4X. My interest is mostly in time series processing at the edge. In my
> daytime job I work for two companies called pragmatic minds and pragmatic
> industries which we founded nearly 3 years ago in South Germany.
> I love the idea behind iotDB as it is realy the materialization of many of
> my thoughts about what we really need for efficient storage of ts data.
> I would love to get my hands dirty on the query and filter api and perhaps
> even write a small Calcite Adapter, when I find some time in the next weeks.
>
> We have many "IoT" projects with practical use cases in the industry so
> I'll try to bring my perspective in as best as possible.
>
> Best
> Julian
>
>
> On 2018/12/01 12:51:47, Willem Jiang <wi...@gmail.com> wrote:
>
> Hi,
>
> My name is Willem, my Chinese name is 姜宁. I join the ASF since 2006 as
> initial committer (just like most of you) of CXF. Then I joined the
> development of Apache ActiveMQ, Apache Camel, Apache ServiceMix. Now
> I'm working for Huawei and leading the project Apache SerivceComb. As
> IPMC member I had chance to mentor several Apache Podling projects
> which were started from China. Now I'm happy to be the mentor of
> iotdb, and I will work closely with you (as I'm based in Beijing).
> Please don't hesitate to ask if you have any questions about
> incubating.
>
> I know most of developer may not get use to use mailing list for
> discussion. So I wrote some blogs[1][2] to talk about it when
> mentoring the RocketMQ. Please take a look let me know what you think.
>
> [1]https://willemjiang.github.io/blog/2016/why-we-use-mailing-list/
> [2]https://willemjiang.github.io/blog/2016/opensource-code-of-conduct/
>
> Willem Jiang
>
> Twitter: willemjiang
> Weibo: 姜宁willem
> On Fri, Nov 30, 2018 at 10:34 PM 李天安 <lt...@mails.tsinghua.edu.cn> wrote:
>
>
> Hello, all,
>
>
> I'm Tianan Li, it’s my first year of being a master student in School of
> Software at Tsinghua University. I used to take part in the development of
> postback model, which is used to transmit data from end to cloud.
>
> It's my great honor to participate in such an awesome project and I hope
> to make more contributions for IoTDB.
>
>
> Best Regards,
> —————————————————
> Tianan Li
> School of Software, Tsinghua University
>
> 在 2018年11月30日，上午5:43，Justin Mclean <ju...@classsoftware.com> 写道：
>
> Hi,
>
> I’m Justin and I volunteered to be a mentor for this project and help out
> where needed. So if you need any help or have any questions, in particular
> about how the ASF works, please ask on this list.
>
> I’ve been involved in the ASF for a while now and mentor and help out on a
> few projects, several of them in the IoT space. I’m currently the V.P of
> the Apache incubator and of Apache Mynewt. I’ve been involved in number of
> commercial IoT projects (and scada systems) and I’m a electronics hobbyist.
> I run the IoT meetup in Sydney Australia, speak at conferences and run the
> occasional workshop. I’m a freelance developer and teacher and currently
> split my time between the two, teaching at an online college / being a
> casual academic at university and working as a developer or consultant on
> several projects.
>
> Thanks,
> Justin
>
>
>
>
Re: Welcome to the IoTDB project
Posted by 勾王敏浩 <gw...@mails.tsinghua.edu.cn>.
Hi,
Currently we face a problem,when we use calcite connection to get the comment of the table,the "REMARK" of table is returned with "null".
I wonder whether we can get table comment or column comment using calcite.
Thank you
| |
gwmh18
大数据工程国家实验室
gwmh18@mails.tsinghua.edu.cn
|
签名由网易邮箱大师定制
On 12/3/2018 05:32，Julian Feinauer<jf...@apache.org> wrote：
Hi,
my name is Julian Feinauer and I come from Apache Calcite, Edgent and PLC4X. My interest is mostly in time series processing at the edge. In my daytime job I work for two companies called pragmatic minds and pragmatic industries which we founded nearly 3 years ago in South Germany.
I love the idea behind iotDB as it is realy the materialization of many of my thoughts about what we really need for efficient storage of ts data.
I would love to get my hands dirty on the query and filter api and perhaps even write a small Calcite Adapter, when I find some time in the next weeks.
We have many "IoT" projects with practical use cases in the industry so I'll try to bring my perspective in as best as possible.
Best
Julian
On 2018/12/01 12:51:47, Willem Jiang <wi...@gmail.com> wrote:
Hi,
My name is Willem, my Chinese name is 姜宁. I join the ASF since 2006 as
initial committer (just like most of you) of CXF. Then I joined the
development of Apache ActiveMQ, Apache Camel, Apache ServiceMix. Now
I'm working for Huawei and leading the project Apache SerivceComb. As
IPMC member I had chance to mentor several Apache Podling projects
which were started from China. Now I'm happy to be the mentor of
iotdb, and I will work closely with you (as I'm based in Beijing).
Please don't hesitate to ask if you have any questions about
incubating.
I know most of developer may not get use to use mailing list for
discussion. So I wrote some blogs[1][2] to talk about it when
mentoring the RocketMQ. Please take a look let me know what you think.
[1]https://willemjiang.github.io/blog/2016/why-we-use-mailing-list/
[2]https://willemjiang.github.io/blog/2016/opensource-code-of-conduct/
Willem Jiang
Twitter: willemjiang
Weibo: 姜宁willem
On Fri, Nov 30, 2018 at 10:34 PM 李天安 <lt...@mails.tsinghua.edu.cn> wrote:
Hello, all,
I'm Tianan Li, it’s my first year of being a master student in School of Software at Tsinghua University. I used to take part in the development of postback model, which is used to transmit data from end to cloud.
It's my great honor to participate in such an awesome project and I hope to make more contributions for IoTDB.
Best Regards,
—————————————————
Tianan Li
School of Software, Tsinghua University
在 2018年11月30日，上午5:43，Justin Mclean <ju...@classsoftware.com> 写道：
Hi,
I’m Justin and I volunteered to be a mentor for this project and help out where needed. So if you need any help or have any questions, in particular about how the ASF works, please ask on this list.
I’ve been involved in the ASF for a while now and mentor and help out on a few projects, several of them in the IoT space. I’m currently the V.P of the Apache incubator and of Apache Mynewt. I’ve been involved in number of commercial IoT projects (and scada systems) and I’m a electronics hobbyist. I run the IoT meetup in Sydney Australia, speak at conferences and run the occasional workshop. I’m a freelance developer and teacher and currently split my time between the two, teaching at an online college / being a casual academic at university and working as a developer or consultant on several projects.
Thanks,
Justin
Re: Integrate Calcite in IoTDB
Posted by Julian Feinauer <j....@pragmaticminds.de>.
Hey Gaofei,
a short update.
I pushed a change to go to Calcite 1.18.0 Release version.
Now everything should work out of the box.
Sorry again!
Julian
Am 20.03.19, 15:19 schrieb "Julian Feinauer" <j....@pragmaticminds.de>:
Hi Gaofei,
well it seems from the first message indeed as if you simply should build the local Calicte snapshot.
Calcite is currently about to do the 1.19 release so their build should work.
Let me see if we can simply downgrade everything on 1.18 release of calcite. If so, everything should be fine : )
Sorry for this snapshot dependency, I forgot that others could also use the code.
Julian
Am 20.03.19, 15:04 schrieb "Gaofei Cao" <ca...@apache.org>:
Hi Julian,
I cloned your repo https://github.com/JulianFeinauer/incubator-iotdb/tree/
calcite-integration, but an error appeared as below.
Could not resolve dependencies for project
>> org.apache.iotdb:iotdb-calcite:jar:0.8.0-SNAPSHOT: Failure to find
>> org.apache.calcite:calcite-core:jar:1.19.0-SNAPSHOT in
>> https://repository.apache.org/snapshots was cached in the local
>> repository, resolution will not be reattempted until the update interval of
>> apache.snapshots has elapsed or updates are forced -> [Help 1]
>
>
>
And I cloned Apache-Calcite, checkout to the branch branch-1.19, executed
`mvn clean install -Dmaven.test.skip=true`, but an error appeared as below.
[ERROR] Failed to execute goal
>> org.apache.maven.plugins:maven-dependency-plugin:3.1.1:analyze-only
>> (analyze) on project calcite-linq4j: Dependency problems found -> [Help 1]
>
> [ERROR]
>
> [ERROR] To see the full stack trace of the errors, re-run Maven with the
>> -e switch.
>
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
>
> [ERROR]
>
> [ERROR] For more information about the errors and possible solutions,
>> please read the following articles:
>
> [ERROR] [Help 1]
>> http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
>
> [ERROR]
>
> [ERROR] After correcting the problems, you can resume the build with the
>> command
>
> [ERROR] mvn <goals> -rf :calcite-linq4j
>
>
> So how to solve this problem. And maybe i think it's better to ask this
problem in Calcite community haha. 😂
Thanks & Best Regards
Gaofei
Julian Feinauer <j....@pragmaticminds.de> 于2019年2月28日周四 上午12:23写道：
> Hi Tianan,
>
> personally I found it difficould to learn Calcite from the Documentation,
> but the csv Examples are quite okay to follow.
> I also filed a Jira for this issue [1] and prepared a minimal working
> example for Calcite on top of a tsfile in my fork [2].
>
> The Example in the Repo is fully functional and maps each device from a
> tsfile to one Table and each measurement to a column (+ timestamp).
> It supports basically all SQL Queries.
>
> Of course there is no efficiency yet like predicate pushdown or path
> selection pushdown or so... this is the fun work for the future : )
>
> Best
> Julian
>
> [1] https://issues.apache.org/jira/browse/IOTDB-28
> [2]
> https://github.com/JulianFeinauer/incubator-iotdb/tree/calcite-integration
>
> Am 27.02.19, 16:12 schrieb "李天安" <lt...@mails.tsinghua.edu.cn>:
>
> Hi Julian,
> Nice to hear from you.
> I’m very glad to hear that you’d like to help us with the
> integration.
> We want to proceed the integration as follows:
> Firstly, we will learn how you integrate calcite with other
> products from official website.
> After that, we discuss the structure of Calcite Integration with
> you.
>
> Tianan Li
>
> > 在 2019年2月26日，上午4:39，Julian Feinauer <j....@pragmaticminds.de>
> 写道：
> >
> > Hi Tianan,
> >
> > nice to hear from you!
> > I just recently recognized how far you have come and how less time I
> commited to IoTDB.
> > I would really love to participate in this effort and help you with
> the Calcite Adapter.
> > What do you think is the best way to proceed?
> > I can tell you something about the structure of Calcite
> Integratioons (or make a walkthrough through the Plc4x integration I’ve
> done).
> >
> > What do the others think?
> >
> > Julian
> >
> > Von: 李天安 <lt...@mails.tsinghua.edu.cn>
> > Datum: Montag, 25. Februar 2019 um 17:01
> > An: "jfeinauer@apache.org" <jf...@apache.org>
> > Betreff: Fwd: Integrate Calcite in IoTDB
> >
> >
> >
> >
> > 下面是被转发的邮件：
> >
> > 发件人: 李天安 <lta18@mails.tsinghua.edu.cn<mailto:
> lta18@mails.tsinghua.edu.cn>>
> > 主题: Integrate Calcite in IoTDB
> > 日期: 2019年2月25日 GMT+8 下午2:56:56
> > 收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> > 回复－收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> >
> > Hi Julian,
> >
> > My name is Tianan Li, one of the initial committers of IoTDB
> project. Over the past few months, we have optimized the structure and
> content of the IoTDB project and basically completed it. Now we hope to
> integrate with Calcite. I wonder if you would like to instruct us to
> complete the Calcite-IoTDB Adapter.
> >
> > Best
> > Tianan Li
> >
> >
> > 在 2018年12月3日，上午5:25，Julian Feinauer <jfeinauer@apache.org<mailto:
> jfeinauer@apache.org>> 写道：
> >
> > Hi,
> >
> > my name is Julian Feinauer and I come from Apache Calcite, Edgent
> and PLC4X. My interest is mostly in time series processing at the edge. In
> my daytime job I work for two companies called pragmatic minds and
> pragmatic industries which we founded nearly 3 years ago in South Germany.
> > I love the idea behind iotDB as it is realy the materialization of
> many of my thoughts about what we really need for efficient storage of ts
> data.
> > I would love to get my hands dirty on the query and filter api and
> perhaps even write a small Calcite Adapter, when I find some time in the
> next weeks.
> >
> > We have many "IoT" projects with practical use cases in the industry
> so I'll try to bring my perspective in as best as possible.
> >
> > Best
> > Julian
> >
> >
>
>
>
>
Re: Integrate Calcite in IoTDB
Posted by Julian Feinauer <j....@pragmaticminds.de>.
Hi Gaofei,
well it seems from the first message indeed as if you simply should build the local Calicte snapshot.
Calcite is currently about to do the 1.19 release so their build should work.
Let me see if we can simply downgrade everything on 1.18 release of calcite. If so, everything should be fine : )
Sorry for this snapshot dependency, I forgot that others could also use the code.
Julian
Am 20.03.19, 15:04 schrieb "Gaofei Cao" <ca...@apache.org>:
Hi Julian,
I cloned your repo https://github.com/JulianFeinauer/incubator-iotdb/tree/
calcite-integration, but an error appeared as below.
Could not resolve dependencies for project
>> org.apache.iotdb:iotdb-calcite:jar:0.8.0-SNAPSHOT: Failure to find
>> org.apache.calcite:calcite-core:jar:1.19.0-SNAPSHOT in
>> https://repository.apache.org/snapshots was cached in the local
>> repository, resolution will not be reattempted until the update interval of
>> apache.snapshots has elapsed or updates are forced -> [Help 1]
>
>
>
And I cloned Apache-Calcite, checkout to the branch branch-1.19, executed
`mvn clean install -Dmaven.test.skip=true`, but an error appeared as below.
[ERROR] Failed to execute goal
>> org.apache.maven.plugins:maven-dependency-plugin:3.1.1:analyze-only
>> (analyze) on project calcite-linq4j: Dependency problems found -> [Help 1]
>
> [ERROR]
>
> [ERROR] To see the full stack trace of the errors, re-run Maven with the
>> -e switch.
>
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
>
> [ERROR]
>
> [ERROR] For more information about the errors and possible solutions,
>> please read the following articles:
>
> [ERROR] [Help 1]
>> http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
>
> [ERROR]
>
> [ERROR] After correcting the problems, you can resume the build with the
>> command
>
> [ERROR] mvn <goals> -rf :calcite-linq4j
>
>
> So how to solve this problem. And maybe i think it's better to ask this
problem in Calcite community haha. 😂
Thanks & Best Regards
Gaofei
Julian Feinauer <j....@pragmaticminds.de> 于2019年2月28日周四 上午12:23写道：
> Hi Tianan,
>
> personally I found it difficould to learn Calcite from the Documentation,
> but the csv Examples are quite okay to follow.
> I also filed a Jira for this issue [1] and prepared a minimal working
> example for Calcite on top of a tsfile in my fork [2].
>
> The Example in the Repo is fully functional and maps each device from a
> tsfile to one Table and each measurement to a column (+ timestamp).
> It supports basically all SQL Queries.
>
> Of course there is no efficiency yet like predicate pushdown or path
> selection pushdown or so... this is the fun work for the future : )
>
> Best
> Julian
>
> [1] https://issues.apache.org/jira/browse/IOTDB-28
> [2]
> https://github.com/JulianFeinauer/incubator-iotdb/tree/calcite-integration
>
> Am 27.02.19, 16:12 schrieb "李天安" <lt...@mails.tsinghua.edu.cn>:
>
> Hi Julian,
> Nice to hear from you.
> I’m very glad to hear that you’d like to help us with the
> integration.
> We want to proceed the integration as follows:
> Firstly, we will learn how you integrate calcite with other
> products from official website.
> After that, we discuss the structure of Calcite Integration with
> you.
>
> Tianan Li
>
> > 在 2019年2月26日，上午4:39，Julian Feinauer <j....@pragmaticminds.de>
> 写道：
> >
> > Hi Tianan,
> >
> > nice to hear from you!
> > I just recently recognized how far you have come and how less time I
> commited to IoTDB.
> > I would really love to participate in this effort and help you with
> the Calcite Adapter.
> > What do you think is the best way to proceed?
> > I can tell you something about the structure of Calcite
> Integratioons (or make a walkthrough through the Plc4x integration I’ve
> done).
> >
> > What do the others think?
> >
> > Julian
> >
> > Von: 李天安 <lt...@mails.tsinghua.edu.cn>
> > Datum: Montag, 25. Februar 2019 um 17:01
> > An: "jfeinauer@apache.org" <jf...@apache.org>
> > Betreff: Fwd: Integrate Calcite in IoTDB
> >
> >
> >
> >
> > 下面是被转发的邮件：
> >
> > 发件人: 李天安 <lta18@mails.tsinghua.edu.cn<mailto:
> lta18@mails.tsinghua.edu.cn>>
> > 主题: Integrate Calcite in IoTDB
> > 日期: 2019年2月25日 GMT+8 下午2:56:56
> > 收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> > 回复－收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> >
> > Hi Julian,
> >
> > My name is Tianan Li, one of the initial committers of IoTDB
> project. Over the past few months, we have optimized the structure and
> content of the IoTDB project and basically completed it. Now we hope to
> integrate with Calcite. I wonder if you would like to instruct us to
> complete the Calcite-IoTDB Adapter.
> >
> > Best
> > Tianan Li
> >
> >
> > 在 2018年12月3日，上午5:25，Julian Feinauer <jfeinauer@apache.org<mailto:
> jfeinauer@apache.org>> 写道：
> >
> > Hi,
> >
> > my name is Julian Feinauer and I come from Apache Calcite, Edgent
> and PLC4X. My interest is mostly in time series processing at the edge. In
> my daytime job I work for two companies called pragmatic minds and
> pragmatic industries which we founded nearly 3 years ago in South Germany.
> > I love the idea behind iotDB as it is realy the materialization of
> many of my thoughts about what we really need for efficient storage of ts
> data.
> > I would love to get my hands dirty on the query and filter api and
> perhaps even write a small Calcite Adapter, when I find some time in the
> next weeks.
> >
> > We have many "IoT" projects with practical use cases in the industry
> so I'll try to bring my perspective in as best as possible.
> >
> > Best
> > Julian
> >
> >
>
>
>
>
Re: Integrate Calcite in IoTDB
Posted by Gaofei Cao <ca...@apache.org>.
Hi Julian,
I cloned your repo https://github.com/JulianFeinauer/incubator-iotdb/tree/
calcite-integration, but an error appeared as below.
Could not resolve dependencies for project
>> org.apache.iotdb:iotdb-calcite:jar:0.8.0-SNAPSHOT: Failure to find
>> org.apache.calcite:calcite-core:jar:1.19.0-SNAPSHOT in
>> https://repository.apache.org/snapshots was cached in the local
>> repository, resolution will not be reattempted until the update interval of
>> apache.snapshots has elapsed or updates are forced -> [Help 1]
>
>
>
And I cloned Apache-Calcite, checkout to the branch branch-1.19, executed
`mvn clean install -Dmaven.test.skip=true`, but an error appeared as below.
[ERROR] Failed to execute goal
>> org.apache.maven.plugins:maven-dependency-plugin:3.1.1:analyze-only
>> (analyze) on project calcite-linq4j: Dependency problems found -> [Help 1]
>
> [ERROR]
>
> [ERROR] To see the full stack trace of the errors, re-run Maven with the
>> -e switch.
>
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
>
> [ERROR]
>
> [ERROR] For more information about the errors and possible solutions,
>> please read the following articles:
>
> [ERROR] [Help 1]
>> http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
>
> [ERROR]
>
> [ERROR] After correcting the problems, you can resume the build with the
>> command
>
> [ERROR] mvn <goals> -rf :calcite-linq4j
>
>
> So how to solve this problem. And maybe i think it's better to ask this
problem in Calcite community haha. 😂
Thanks & Best Regards
Gaofei
Julian Feinauer <j....@pragmaticminds.de> 于2019年2月28日周四 上午12:23写道：
> Hi Tianan,
>
> personally I found it difficould to learn Calcite from the Documentation,
> but the csv Examples are quite okay to follow.
> I also filed a Jira for this issue [1] and prepared a minimal working
> example for Calcite on top of a tsfile in my fork [2].
>
> The Example in the Repo is fully functional and maps each device from a
> tsfile to one Table and each measurement to a column (+ timestamp).
> It supports basically all SQL Queries.
>
> Of course there is no efficiency yet like predicate pushdown or path
> selection pushdown or so... this is the fun work for the future : )
>
> Best
> Julian
>
> [1] https://issues.apache.org/jira/browse/IOTDB-28
> [2]
> https://github.com/JulianFeinauer/incubator-iotdb/tree/calcite-integration
>
> Am 27.02.19, 16:12 schrieb "李天安" <lt...@mails.tsinghua.edu.cn>:
>
> Hi Julian,
> Nice to hear from you.
> I’m very glad to hear that you’d like to help us with the
> integration.
> We want to proceed the integration as follows:
> Firstly, we will learn how you integrate calcite with other
> products from official website.
> After that, we discuss the structure of Calcite Integration with
> you.
>
> Tianan Li
>
> > 在 2019年2月26日，上午4:39，Julian Feinauer <j....@pragmaticminds.de>
> 写道：
> >
> > Hi Tianan,
> >
> > nice to hear from you!
> > I just recently recognized how far you have come and how less time I
> commited to IoTDB.
> > I would really love to participate in this effort and help you with
> the Calcite Adapter.
> > What do you think is the best way to proceed?
> > I can tell you something about the structure of Calcite
> Integratioons (or make a walkthrough through the Plc4x integration I’ve
> done).
> >
> > What do the others think?
> >
> > Julian
> >
> > Von: 李天安 <lt...@mails.tsinghua.edu.cn>
> > Datum: Montag, 25. Februar 2019 um 17:01
> > An: "jfeinauer@apache.org" <jf...@apache.org>
> > Betreff: Fwd: Integrate Calcite in IoTDB
> >
> >
> >
> >
> > 下面是被转发的邮件：
> >
> > 发件人: 李天安 <lta18@mails.tsinghua.edu.cn<mailto:
> lta18@mails.tsinghua.edu.cn>>
> > 主题: Integrate Calcite in IoTDB
> > 日期: 2019年2月25日 GMT+8 下午2:56:56
> > 收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> > 回复－收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> >
> > Hi Julian,
> >
> > My name is Tianan Li, one of the initial committers of IoTDB
> project. Over the past few months, we have optimized the structure and
> content of the IoTDB project and basically completed it. Now we hope to
> integrate with Calcite. I wonder if you would like to instruct us to
> complete the Calcite-IoTDB Adapter.
> >
> > Best
> > Tianan Li
> >
> >
> > 在 2018年12月3日，上午5:25，Julian Feinauer <jfeinauer@apache.org<mailto:
> jfeinauer@apache.org>> 写道：
> >
> > Hi,
> >
> > my name is Julian Feinauer and I come from Apache Calcite, Edgent
> and PLC4X. My interest is mostly in time series processing at the edge. In
> my daytime job I work for two companies called pragmatic minds and
> pragmatic industries which we founded nearly 3 years ago in South Germany.
> > I love the idea behind iotDB as it is realy the materialization of
> many of my thoughts about what we really need for efficient storage of ts
> data.
> > I would love to get my hands dirty on the query and filter api and
> perhaps even write a small Calcite Adapter, when I find some time in the
> next weeks.
> >
> > We have many "IoT" projects with practical use cases in the industry
> so I'll try to bring my perspective in as best as possible.
> >
> > Best
> > Julian
> >
> >
>
>
>
>
Re: Integrate Calcite in IoTDB
Posted by Julian Feinauer <j....@pragmaticminds.de>.
Hi Tianan,
personally I found it difficould to learn Calcite from the Documentation, but the csv Examples are quite okay to follow.
I also filed a Jira for this issue [1] and prepared a minimal working example for Calcite on top of a tsfile in my fork [2].
The Example in the Repo is fully functional and maps each device from a tsfile to one Table and each measurement to a column (+ timestamp).
It supports basically all SQL Queries.
Of course there is no efficiency yet like predicate pushdown or path selection pushdown or so... this is the fun work for the future : )
Best
Julian
[1] https://issues.apache.org/jira/browse/IOTDB-28
[2] https://github.com/JulianFeinauer/incubator-iotdb/tree/calcite-integration
Am 27.02.19, 16:12 schrieb "李天安" <lt...@mails.tsinghua.edu.cn>:
Hi Julian,
Nice to hear from you.
I’m very glad to hear that you’d like to help us with the integration.
We want to proceed the integration as follows:
Firstly, we will learn how you integrate calcite with other products from official website.
After that, we discuss the structure of Calcite Integration with you.
Tianan Li
> 在 2019年2月26日，上午4:39，Julian Feinauer <j....@pragmaticminds.de> 写道：
>
> Hi Tianan,
>
> nice to hear from you!
> I just recently recognized how far you have come and how less time I commited to IoTDB.
> I would really love to participate in this effort and help you with the Calcite Adapter.
> What do you think is the best way to proceed?
> I can tell you something about the structure of Calcite Integratioons (or make a walkthrough through the Plc4x integration I’ve done).
>
> What do the others think?
>
> Julian
>
> Von: 李天安 <lt...@mails.tsinghua.edu.cn>
> Datum: Montag, 25. Februar 2019 um 17:01
> An: "jfeinauer@apache.org" <jf...@apache.org>
> Betreff: Fwd: Integrate Calcite in IoTDB
>
>
>
>
> 下面是被转发的邮件：
>
> 发件人: 李天安 <lt...@mails.tsinghua.edu.cn>>
> 主题: Integrate Calcite in IoTDB
> 日期: 2019年2月25日 GMT+8 下午2:56:56
> 收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> 回复－收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
>
> Hi Julian,
>
> My name is Tianan Li, one of the initial committers of IoTDB project. Over the past few months, we have optimized the structure and content of the IoTDB project and basically completed it. Now we hope to integrate with Calcite. I wonder if you would like to instruct us to complete the Calcite-IoTDB Adapter.
>
> Best
> Tianan Li
>
>
> 在 2018年12月3日，上午5:25，Julian Feinauer <jf...@apache.org>> 写道：
>
> Hi,
>
> my name is Julian Feinauer and I come from Apache Calcite, Edgent and PLC4X. My interest is mostly in time series processing at the edge. In my daytime job I work for two companies called pragmatic minds and pragmatic industries which we founded nearly 3 years ago in South Germany.
> I love the idea behind iotDB as it is realy the materialization of many of my thoughts about what we really need for efficient storage of ts data.
> I would love to get my hands dirty on the query and filter api and perhaps even write a small Calcite Adapter, when I find some time in the next weeks.
>
> We have many "IoT" projects with practical use cases in the industry so I'll try to bring my perspective in as best as possible.
>
> Best
> Julian
>
>
Re: Integrate Calcite in IoTDB
Posted by 李天安 <lt...@mails.tsinghua.edu.cn>.
Hi Julian,
Nice to hear from you.
I’m very glad to hear that you’d like to help us with the integration.
We want to proceed the integration as follows:
Firstly, we will learn how you integrate calcite with other products from official website.
After that, we discuss the structure of Calcite Integration with you.
Tianan Li
> 在 2019年2月26日，上午4:39，Julian Feinauer <j....@pragmaticminds.de> 写道：
>
> Hi Tianan,
>
> nice to hear from you!
> I just recently recognized how far you have come and how less time I commited to IoTDB.
> I would really love to participate in this effort and help you with the Calcite Adapter.
> What do you think is the best way to proceed?
> I can tell you something about the structure of Calcite Integratioons (or make a walkthrough through the Plc4x integration I’ve done).
>
> What do the others think?
>
> Julian
>
> Von: 李天安 <lt...@mails.tsinghua.edu.cn>
> Datum: Montag, 25. Februar 2019 um 17:01
> An: "jfeinauer@apache.org" <jf...@apache.org>
> Betreff: Fwd: Integrate Calcite in IoTDB
>
>
>
>
> 下面是被转发的邮件：
>
> 发件人: 李天安 <lt...@mails.tsinghua.edu.cn>>
> 主题: Integrate Calcite in IoTDB
> 日期: 2019年2月25日 GMT+8 下午2:56:56
> 收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
> 回复－收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
>
> Hi Julian,
>
> My name is Tianan Li, one of the initial committers of IoTDB project. Over the past few months, we have optimized the structure and content of the IoTDB project and basically completed it. Now we hope to integrate with Calcite. I wonder if you would like to instruct us to complete the Calcite-IoTDB Adapter.
>
> Best
> Tianan Li
>
>
> 在 2018年12月3日，上午5:25，Julian Feinauer <jf...@apache.org>> 写道：
>
> Hi,
>
> my name is Julian Feinauer and I come from Apache Calcite, Edgent and PLC4X. My interest is mostly in time series processing at the edge. In my daytime job I work for two companies called pragmatic minds and pragmatic industries which we founded nearly 3 years ago in South Germany.
> I love the idea behind iotDB as it is realy the materialization of many of my thoughts about what we really need for efficient storage of ts data.
> I would love to get my hands dirty on the query and filter api and perhaps even write a small Calcite Adapter, when I find some time in the next weeks.
>
> We have many "IoT" projects with practical use cases in the industry so I'll try to bring my perspective in as best as possible.
>
> Best
> Julian
>
>
Re: Integrate Calcite in IoTDB
Posted by Julian Feinauer <j....@pragmaticminds.de>.
Hi Tianan,
nice to hear from you!
I just recently recognized how far you have come and how less time I commited to IoTDB.
I would really love to participate in this effort and help you with the Calcite Adapter.
What do you think is the best way to proceed?
I can tell you something about the structure of Calcite Integratioons (or make a walkthrough through the Plc4x integration I’ve done).
What do the others think?
Julian
Von: 李天安 <lt...@mails.tsinghua.edu.cn>
Datum: Montag, 25. Februar 2019 um 17:01
An: "jfeinauer@apache.org" <jf...@apache.org>
Betreff: Fwd: Integrate Calcite in IoTDB
下面是被转发的邮件：
发件人: 李天安 <lt...@mails.tsinghua.edu.cn>>
主题: Integrate Calcite in IoTDB
日期: 2019年2月25日 GMT+8 下午2:56:56
收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
回复－收件人: dev@iotdb.apache.org<ma...@iotdb.apache.org>
Hi Julian,
My name is Tianan Li, one of the initial committers of IoTDB project. Over the past few months, we have optimized the structure and content of the IoTDB project and basically completed it. Now we hope to integrate with Calcite. I wonder if you would like to instruct us to complete the Calcite-IoTDB Adapter.
Best
Tianan Li
在 2018年12月3日，上午5:25，Julian Feinauer <jf...@apache.org>> 写道：
Hi,
my name is Julian Feinauer and I come from Apache Calcite, Edgent and PLC4X. My interest is mostly in time series processing at the edge. In my daytime job I work for two companies called pragmatic minds and pragmatic industries which we founded nearly 3 years ago in South Germany.
I love the idea behind iotDB as it is realy the materialization of many of my thoughts about what we really need for efficient storage of ts data.
I would love to get my hands dirty on the query and filter api and perhaps even write a small Calcite Adapter, when I find some time in the next weeks.
We have many "IoT" projects with practical use cases in the industry so I'll try to bring my perspective in as best as possible.
Best
Julian
Integrate Calcite in IoTDB
Posted by 李天安 <lt...@mails.tsinghua.edu.cn>.
Hi Julian,
My name is Tianan Li, one of the initial committers of IoTDB project. Over the past few months, we have optimized the structure and content of the IoTDB project and basically completed it. Now we hope to integrate with Calcite. I wonder if you would like to instruct us to complete the Calcite-IoTDB Adapter.
Best
Tianan Li
> 在 2018年12月3日，上午5:25，Julian Feinauer <jf...@apache.org> 写道：
>
> Hi,
>
> my name is Julian Feinauer and I come from Apache Calcite, Edgent and PLC4X. My interest is mostly in time series processing at the edge. In my daytime job I work for two companies called pragmatic minds and pragmatic industries which we founded nearly 3 years ago in South Germany.
> I love the idea behind iotDB as it is realy the materialization of many of my thoughts about what we really need for efficient storage of ts data.
> I would love to get my hands dirty on the query and filter api and perhaps even write a small Calcite Adapter, when I find some time in the next weeks.
>
> We have many "IoT" projects with practical use cases in the industry so I'll try to bring my perspective in as best as possible.
>
> Best
> Julian
Re: Welcome to the IoTDB project
Posted by Xiangdong Huang <sa...@gmail.com>.
Hi Julian,
Glad to see the integration with Calcite. We are writing the documents of
English version and will finish it quickly.
Best,
-----------------------------------
Xiangdong Huang
School of Software, Tsinghua University
黄向东
清华大学 软件学院
Julian Feinauer <jf...@apache.org> 于2018年12月3日周一 上午5:25写道：
> Hi,
>
> my name is Julian Feinauer and I come from Apache Calcite, Edgent and
> PLC4X. My interest is mostly in time series processing at the edge. In my
> daytime job I work for two companies called pragmatic minds and pragmatic
> industries which we founded nearly 3 years ago in South Germany.
> I love the idea behind iotDB as it is realy the materialization of many of
> my thoughts about what we really need for efficient storage of ts data.
> I would love to get my hands dirty on the query and filter api and perhaps
> even write a small Calcite Adapter, when I find some time in the next weeks.
>
> We have many "IoT" projects with practical use cases in the industry so
> I'll try to bring my perspective in as best as possible.
>
> Best
> Julian
>
>
> On 2018/12/01 12:51:47, Willem Jiang <wi...@gmail.com> wrote:
> > Hi,
> >
> > My name is Willem, my Chinese name is 姜宁. I join the ASF since 2006 as
> > initial committer (just like most of you) of CXF. Then I joined the
> > development of Apache ActiveMQ, Apache Camel, Apache ServiceMix. Now
> > I'm working for Huawei and leading the project Apache SerivceComb. As
> > IPMC member I had chance to mentor several Apache Podling projects
> > which were started from China. Now I'm happy to be the mentor of
> > iotdb, and I will work closely with you (as I'm based in Beijing).
> > Please don't hesitate to ask if you have any questions about
> > incubating.
> >
> > I know most of developer may not get use to use mailing list for
> > discussion. So I wrote some blogs[1][2] to talk about it when
> > mentoring the RocketMQ. Please take a look let me know what you think.
> >
> > [1]https://willemjiang.github.io/blog/2016/why-we-use-mailing-list/
> > [2]https://willemjiang.github.io/blog/2016/opensource-code-of-conduct/
> >
> > Willem Jiang
> >
> > Twitter: willemjiang
> > Weibo: 姜宁willem
> > On Fri, Nov 30, 2018 at 10:34 PM 李天安 <lt...@mails.tsinghua.edu.cn>
> wrote:
> > >
> > > Hello, all,
> > >
> > >
> > > I'm Tianan Li, it’s my first year of being a master student in School
> of Software at Tsinghua University. I used to take part in the development
> of postback model, which is used to transmit data from end to cloud.
> > >
> > > It's my great honor to participate in such an awesome project and I
> hope to make more contributions for IoTDB.
> > >
> > >
> > > Best Regards,
> > > —————————————————
> > > Tianan Li
> > > School of Software, Tsinghua University
> > >
> > > > 在 2018年11月30日，上午5:43，Justin Mclean <ju...@classsoftware.com> 写道：
> > > >
> > > > Hi,
> > > >
> > > > I’m Justin and I volunteered to be a mentor for this project and
> help out where needed. So if you need any help or have any questions, in
> particular about how the ASF works, please ask on this list.
> > > >
> > > > I’ve been involved in the ASF for a while now and mentor and help
> out on a few projects, several of them in the IoT space. I’m currently the
> V.P of the Apache incubator and of Apache Mynewt. I’ve been involved in
> number of commercial IoT projects (and scada systems) and I’m a electronics
> hobbyist. I run the IoT meetup in Sydney Australia, speak at conferences
> and run the occasional workshop. I’m a freelance developer and teacher and
> currently split my time between the two, teaching at an online college /
> being a casual academic at university and working as a developer or
> consultant on several projects.
> > > >
> > > > Thanks,
> > > > Justin
> > >
> >
>
Re: Welcome to the IoTDB project
Posted by Julian Feinauer <jf...@apache.org>.
Hi,
my name is Julian Feinauer and I come from Apache Calcite, Edgent and PLC4X. My interest is mostly in time series processing at the edge. In my daytime job I work for two companies called pragmatic minds and pragmatic industries which we founded nearly 3 years ago in South Germany.
I love the idea behind iotDB as it is realy the materialization of many of my thoughts about what we really need for efficient storage of ts data.
I would love to get my hands dirty on the query and filter api and perhaps even write a small Calcite Adapter, when I find some time in the next weeks.
We have many "IoT" projects with practical use cases in the industry so I'll try to bring my perspective in as best as possible.
Best
Julian
On 2018/12/01 12:51:47, Willem Jiang <wi...@gmail.com> wrote:
> Hi,
>
> My name is Willem, my Chinese name is 姜宁. I join the ASF since 2006 as
> initial committer (just like most of you) of CXF. Then I joined the
> development of Apache ActiveMQ, Apache Camel, Apache ServiceMix. Now
> I'm working for Huawei and leading the project Apache SerivceComb. As
> IPMC member I had chance to mentor several Apache Podling projects
> which were started from China. Now I'm happy to be the mentor of
> iotdb, and I will work closely with you (as I'm based in Beijing).
> Please don't hesitate to ask if you have any questions about
> incubating.
>
> I know most of developer may not get use to use mailing list for
> discussion. So I wrote some blogs[1][2] to talk about it when
> mentoring the RocketMQ. Please take a look let me know what you think.
>
> [1]https://willemjiang.github.io/blog/2016/why-we-use-mailing-list/
> [2]https://willemjiang.github.io/blog/2016/opensource-code-of-conduct/
>
> Willem Jiang
>
> Twitter: willemjiang
> Weibo: 姜宁willem
> On Fri, Nov 30, 2018 at 10:34 PM 李天安 <lt...@mails.tsinghua.edu.cn> wrote:
> >
> > Hello, all,
> >
> >
> > I'm Tianan Li, it’s my first year of being a master student in School of Software at Tsinghua University. I used to take part in the development of postback model, which is used to transmit data from end to cloud.
> >
> > It's my great honor to participate in such an awesome project and I hope to make more contributions for IoTDB.
> >
> >
> > Best Regards,
> > —————————————————
> > Tianan Li
> > School of Software, Tsinghua University
> >
> > > 在 2018年11月30日，上午5:43，Justin Mclean <ju...@classsoftware.com> 写道：
> > >
> > > Hi,
> > >
> > > I’m Justin and I volunteered to be a mentor for this project and help out where needed. So if you need any help or have any questions, in particular about how the ASF works, please ask on this list.
> > >
> > > I’ve been involved in the ASF for a while now and mentor and help out on a few projects, several of them in the IoT space. I’m currently the V.P of the Apache incubator and of Apache Mynewt. I’ve been involved in number of commercial IoT projects (and scada systems) and I’m a electronics hobbyist. I run the IoT meetup in Sydney Australia, speak at conferences and run the occasional workshop. I’m a freelance developer and teacher and currently split my time between the two, teaching at an online college / being a casual academic at university and working as a developer or consultant on several projects.
> > >
> > > Thanks,
> > > Justin
> >
>