Comments on: Free Java hosting with the Google App Engine http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/ Keep updated on what we're doing! Wed, 28 Jul 2010 21:43:04 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Andrew Phillips http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/comment-page-1/#comment-1785 Andrew Phillips Tue, 16 Feb 2010 16:20:16 +0000 http://blog.jteam.nl/?p=1664#comment-1785 There are also some interesting (?) quirks involved in getting Spring's JavaConfig and annotation-driven configurations to work, but most of it can be done. See the following blog post: http://blog.xebia.com/2010/01/17/using-springs-java-configuration-on-google-app-engine/ There are also some interesting (?) quirks involved in getting Spring’s JavaConfig and annotation-driven configurations to work, but most of it can be done. See the following blog post:

http://blog.xebia.com/2010/01/17/using-springs-java-configuration-on-google-app-engine/

]]> By: Feargal http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/comment-page-1/#comment-1706 Feargal Wed, 10 Feb 2010 13:49:55 +0000 http://blog.jteam.nl/?p=1664#comment-1706 I use the JDO implementation and I find it to be better supported but yes it is also restricted so you have to carefully model your data around it. I have a google app engine application that mixes Spring MVC for the UI and Scala for the backend. From time to time I come across restrictions due to the blacklist but there are always work arounds to be found. My main problem with app engine for Java is its lack of maturity and issues do not seem to get fixed very quickly. I use the JDO implementation and I find it to be better supported but yes it is also restricted so you have to carefully model your data around it.

I have a google app engine application that mixes Spring MVC for the UI and Scala for the backend. From time to time I come across restrictions due to the blacklist but there are always work arounds to be found. My main problem with app engine for Java is its lack of maturity and issues do not seem to get fixed very quickly.

]]> By: cometta http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/comment-page-1/#comment-1689 cometta Tue, 09 Feb 2010 02:13:19 +0000 http://blog.jteam.nl/?p=1664#comment-1689 may i know does by setting javax.servlet.jsp.jstl.fmt.timeZone makes the logs to show timezone we want? or that parameter is only used for jsp-jstl ? may i know does by setting javax.servlet.jsp.jstl.fmt.timeZone makes the logs
to show timezone we want? or that parameter is only used for jsp-jstl ?

]]> By: RichardR http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/comment-page-1/#comment-1671 RichardR Sun, 07 Feb 2010 08:02:24 +0000 http://blog.jteam.nl/?p=1664#comment-1671 Great info, I was wondering how to beat the initial lag problem. Many thanks! Great info, I was wondering how to beat the initial lag problem. Many thanks!

]]> By: Tristan http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/comment-page-1/#comment-1645 Tristan Fri, 05 Feb 2010 18:56:53 +0000 http://blog.jteam.nl/?p=1664#comment-1645 Good overview. Another (more native) way of accessing the data store is the Low-Level Datastore API. If you're comfortable with non-relational databases, this is the way to go. Cheers! Good overview.

Another (more native) way of accessing the data store is the Low-Level Datastore API. If you’re comfortable with non-relational databases, this is the way to go.

Cheers!

]]> By: NM http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/comment-page-1/#comment-1638 NM Fri, 05 Feb 2010 13:06:18 +0000 http://blog.jteam.nl/?p=1664#comment-1638 Very good :) Also there is a forum for GAE www.gaeforums.com bye NM Very good :)
Also there is a forum for GAE
http://www.gaeforums.com
bye
NM

]]> By: Hilbrand http://blog.jteam.nl/2010/02/04/free-java-hosting-with-the-google-app-engine/comment-page-1/#comment-1617 Hilbrand Thu, 04 Feb 2010 17:36:55 +0000 http://blog.jteam.nl/?p=1664#comment-1617 Tom, nice introduction to GAE. Here are some additional thoughts: - GAE also supports the XMPP protocol, which makes it possible to interact with chat clients. However, because GAE limits the time a http connections is open, webbased chat clients using comet like techniques are not ideal. You need to reopen the connection every time, which means more quota hits, which means you might hit your free limit sooner. - Regarding keeping instances alive with a cronjob, this is discouraged by google, as can be read here: http://groups.google.com/group/google-appengine/browse_thread/thread/22692895421825cb/659bbb536f54028f?#659bbb536f54028f. It specific a problem for low traffic sites. - It's not easy to backup the data, because you need to query the whole database, which costs time (problem: time limit for operations/connections) and there is no real official support, like incremental backup. If you have a lot of data, it also could mean you could easily reach you free quota. Tom, nice introduction to GAE.

Here are some additional thoughts:

- GAE also supports the XMPP protocol, which makes it possible to interact with chat clients. However, because GAE limits the time a http connections is open, webbased chat clients using comet like techniques are not ideal. You need to reopen the connection every time, which means more quota hits, which means you might hit your free limit sooner.

- Regarding keeping instances alive with a cronjob, this is discouraged by google, as can be read here: http://groups.google.com/group/google-appengine/browse_thread/thread/22692895421825cb/659bbb536f54028f?#659bbb536f54028f. It specific a problem for low traffic sites.

- It’s not easy to backup the data, because you need to query the whole database, which costs time (problem: time limit for operations/connections) and there is no real official support, like incremental backup. If you have a lot of data, it also could mean you could easily reach you free quota.

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