Re: Setting CacheTTL on Apache Tomcat 8
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Robert, On 9/14/14 4:55 PM, Robert Boyle wrote: Here's what I'm trying to do: I'm building a web-based cueing system for a theatre. Until I figure out how to use WebSockets, my system will use JavaScript to refresh the webpage every second with a cue status file. This is an HTML file built on the fly by VB (or Python). One second latency is no problem. The problem: Unfortunately (for this application) Tomcat caches the web page internally for 5 seconds by default, so the maximum cumulative latency is 6 seconds which is a bit much. I believe I can change this by setting the CacheTTL parameter but, when I try to do this in BASEDIR/conf/context.xml by adding the line cacheTTL=1000, the server won't start and spews out many lines of error messages. I am a total newcomer to Tomcat but I've spend some hours trying to find examples of config files on the web with little success. Obviously I haven't understood the syntax required here so any help is gratefully received. Simple solution: make the HTML file a dynamic resource that Tomcat knows how to generate. That way, there is never any problem with cache TTL, etc. Why did you decide to update the HTML file with VB/Python and then serve it through Tomcat? - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJUFukSAAoJEBzwKT+lPKRYo7gQAI8CohVwGcEDLjgr1RN3ZT5H l/rSSyniUuX0LSQyODaLSYAt7hmr+Kf6Y/pS03pOfn+Tw8KU4gcG8ZkOCxUS8cV/ pqwT844MXpeKF5oql4ManmDgOV7jZ6ivDyHOhDtaLM+iwCv9WGroYFpKTn5cuL6W dKHRAC2o4GHV1CTqwoMBVv/kAASwXd5MWyMOMrXQnUFABxSp9nbkSvalXm6xWfZN up31rR6MLILeQFelEQ6QucxyXBXyJbjr+iALM8cOEO8L1/dT/VxlYVdcGvCn5wSd yr0gI9TzdZ5OsykO99ohBTLI6wKaS+83QbHbX8ybQAIc1z2sokSx0WTTTZhmHWof xUTd0+6p37ueCu1G1RYaCcA7fhOt3rebUccHyGI0jdjuaOKmoxTgQ/67dqbXbpIr fkeouwV1RLU5e0SISDXD6saBqBeZVH3vsN9RiSEOO8glmFmWHLTXLSYFkFDkBMbv kq4vsHGwL5yxGzBa56BYWBl/BLzPtRV6ZqaO3IrhJUVh/i7zRQj9LvXeZHLiA2GF H4amxQie778+2MQ/DwU2yYfxToHNYYYJNp2SETuDwk3mc/LK2vh+wr/C3c3WasOe 0P0F8c2fv138ecctDoKVXe54qYmhZ7zs0VSUgs3mIBxERkevA0kfN+JuWCf8U/6E IOfAI3YC7hQZ6zru6i1u =Qf+W -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Setting CacheTTL on Apache Tomcat 8
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 9/14/2014 1:55 PM, Robert Boyle wrote: Hi, Here's what I'm trying to do: I'm building a web-based cueing system for a theatre. Until I figure out how to use WebSockets, my system will use JavaScript to refresh the webpage every second with a cue status file. This is an HTML file built on the fly by VB (or Python). One second latency is no problem. The problem: Unfortunately (for this application) Tomcat caches the web page internally for 5 seconds by default, so the maximum cumulative latency is 6 seconds which is a bit much. I believe I can change this by setting the CacheTTL parameter but, when I try to do this in BASEDIR/conf/context.xml by adding the line cacheTTL=1000, the server won't start and spews out many lines of error messages. I am a total newcomer to Tomcat but I've spend some hours trying to find examples of config files on the web with little success. Obviously I haven't understood the syntax required here so any help is gratefully received. Environment: Tomcat 8.0.12 Windows 7 / 32bit Robert Robert, That doesn't appear to be available in Tomcat 8 (quick view of the Javadoc). Also, I tried the following (after reading the 7.x docs) which failed as expected. Context cacheTTL=1000 /Context In Tomcat 7 (7.0.55), you can set this with the following syntax. Context cacheTTL=1000 /Context See the reference here: http://tomcat.apache.org/tomcat-7.0-doc/config/context.html 7.0.55 has WebSockets. . . . just my two cents /mde/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.13 (MingW32) iQEcBAEBAgAGBQJUFg9AAAoJEEFGbsYNeTwt2iAIAIgm4SVWJt2iGonyH3IkY+P0 gza1nSmxlamMYt9ZBFeuBMRrBOP7rt1zXaIUzSif8gHfX5slrZG4ghrPgtklDpib BuAms/7MY5cTWIOaHECZxNfbseOY+I94CZnjpqgdAnwuzKGIPUg7KCgFO9Pnk27/ CTRMpSaR1/flebVnWy5gpg4oG/OIFGKALdze5FNsBItQoyuLS+82ylOQYi3YxTLl A0xlDBD+UXbPYIRm5pZ04S+55xEnG2gg3cb298Njx0bzoruKgcIn/UmEiz0iL1+3 RQC3tqsgN5PtYDZdMGE6DzJGlWpvWSr9rLmRgsUGYLbHv8n3l5X2XhDrzqzX9+Q= =iis6 -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Setting CacheTTL on Apache Tomcat 8
Mark Eggers wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 9/14/2014 1:55 PM, Robert Boyle wrote: Hi, Here's what I'm trying to do: I'm building a web-based cueing system for a theatre. Until I figure out how to use WebSockets, my system will use JavaScript to refresh the webpage every second with a cue status file. This is an HTML file built on the fly by VB (or Python). One second latency is no problem. The problem: Unfortunately (for this application) Tomcat caches the web page internally for 5 seconds by default, so the maximum cumulative latency is 6 seconds which is a bit much. I believe I can change this by setting the CacheTTL parameter but, when I try to do this in BASEDIR/conf/context.xml by adding the line cacheTTL=1000, the server won't start and spews out many lines of error messages. I am a total newcomer to Tomcat but I've spend some hours trying to find examples of config files on the web with little success. Obviously I haven't understood the syntax required here so any help is gratefully received. Environment: Tomcat 8.0.12 Windows 7 / 32bit Robert Robert, That doesn't appear to be available in Tomcat 8 (quick view of the Javadoc). Also, I tried the following (after reading the 7.x docs) which failed as expected. Context cacheTTL=1000 /Context In Tomcat 7 (7.0.55), you can set this with the following syntax. Context cacheTTL=1000 /Context See the reference here: http://tomcat.apache.org/tomcat-7.0-doc/config/context.html 7.0.55 has WebSockets. . . . just my two cents /mde/ And mine : https://tomcat.apache.org/tomcat-6.0-doc/config/context.html#Attributes In 6.0, these Context - cache* attributes seem to have been there, but they have disappeared in 8.0. Or at least in the doc : https://tomcat.apache.org/tomcat-8.0-doc/config/context.html#Attributes - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Setting CacheTTL on Apache Tomcat 8
2014-09-15 2:04 GMT+04:00 André Warnier a...@ice-sa.com: Mark Eggers wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 9/14/2014 1:55 PM, Robert Boyle wrote: Hi, Here's what I'm trying to do: I'm building a web-based cueing system for a theatre. Until I figure out how to use WebSockets, my system will use JavaScript to refresh the webpage every second with a cue status file. This is an HTML file built on the fly by VB (or Python). One second latency is no problem. The problem: Unfortunately (for this application) Tomcat caches the web page internally for 5 seconds by default, so the maximum cumulative latency is 6 seconds which is a bit much. I believe I can change this by setting the CacheTTL parameter but, when I try to do this in BASEDIR/conf/context.xml by adding the line cacheTTL=1000, the server won't start and spews out many lines of error messages. I am a total newcomer to Tomcat but I've spend some hours trying to find examples of config files on the web with little success. Obviously I haven't understood the syntax required here so any help is gratefully received. Environment: Tomcat 8.0.12 Windows 7 / 32bit Robert Robert, That doesn't appear to be available in Tomcat 8 (quick view of the Javadoc). Also, I tried the following (after reading the 7.x docs) which failed as expected. Context cacheTTL=1000 /Context In Tomcat 7 (7.0.55), you can set this with the following syntax. Context cacheTTL=1000 /Context See the reference here: http://tomcat.apache.org/tomcat-7.0-doc/config/context.html 7.0.55 has WebSockets. . . . just my two cents /mde/ And mine : https://tomcat.apache.org/tomcat-6.0-doc/config/context.html#Attributes In 6.0, these Context - cache* attributes seem to have been there, but they have disappeared in 8.0. Or at least in the doc : https://tomcat.apache.org/tomcat-8.0-doc/config/context.html#Attributes In Tomcat 8 it is Context Resources cacheTTL=1000/ /Context http://tomcat.apache.org/tomcat-8.0-doc/config/resources.html http://tomcat.apache.org/migration-8.html#Web_application_resources when I try to do this in BASEDIR/conf/context.xml by adding the line 1. conf/context.xml is the default Context configuration file, shared by all web applications. You would better create a file for your own web application, instead of modifying the defaults. cacheTTL=1000, the server won't start and spews out many lines of ... 2. The above line is not syntacticly valid to appear in an XML file. http://en.wikipedia.org/wiki/XML http://www.xmlnews.org/docs/xml-basics.html Best regards, Konstantin Kolinko - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Setting CacheTTL on Apache Tomcat 8
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 9/14/2014 3:39 PM, Konstantin Kolinko wrote: 2014-09-15 2:04 GMT+04:00 André Warnier a...@ice-sa.com: Mark Eggers wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 9/14/2014 1:55 PM, Robert Boyle wrote: Hi, Here's what I'm trying to do: I'm building a web-based cueing system for a theatre. Until I figure out how to use WebSockets, my system will use JavaScript to refresh the webpage every second with a cue status file. This is an HTML file built on the fly by VB (or Python). One second latency is no problem. The problem: Unfortunately (for this application) Tomcat caches the web page internally for 5 seconds by default, so the maximum cumulative latency is 6 seconds which is a bit much. I believe I can change this by setting the CacheTTL parameter but, when I try to do this in BASEDIR/conf/context.xml by adding the line cacheTTL=1000, the server won't start and spews out many lines of error messages. I am a total newcomer to Tomcat but I've spend some hours trying to find examples of config files on the web with little success. Obviously I haven't understood the syntax required here so any help is gratefully received. Environment: Tomcat 8.0.12 Windows 7 / 32bit Robert Robert, That doesn't appear to be available in Tomcat 8 (quick view of the Javadoc). Also, I tried the following (after reading the 7.x docs) which failed as expected. Context cacheTTL=1000 /Context In Tomcat 7 (7.0.55), you can set this with the following syntax. Context cacheTTL=1000 /Context See the reference here: http://tomcat.apache.org/tomcat-7.0-doc/config/context.html 7.0.55 has WebSockets. . . . just my two cents /mde/ And mine : https://tomcat.apache.org/tomcat-6.0-doc/config/context.html#Attributes In 6.0, these Context - cache* attributes seem to have been there, but they have disappeared in 8.0. Or at least in the doc : https://tomcat.apache.org/tomcat-8.0-doc/config/context.html#Attributes In Tomcat 8 it is Context Resources cacheTTL=1000/ /Context http://tomcat.apache.org/tomcat-8.0-doc/config/resources.html http://tomcat.apache.org/migration-8.html#Web_application_resources when I try to do this in BASEDIR/conf/context.xml by adding the line 1. conf/context.xml is the default Context configuration file, shared by all web applications. You would better create a file for your own web application, instead of modifying the defaults. cacheTTL=1000, the server won't start and spews out many lines of ... 2. The above line is not syntacticly valid to appear in an XML file. http://en.wikipedia.org/wiki/XML http://www.xmlnews.org/docs/xml-basics.html Best regards, Konstantin Kolinko Konstantin, Thanks for that. I forgot to look in the Resources section. . . . makes sense, now that I think about it /mde/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.13 (MingW32) iQEcBAEBAgAGBQJUFhnIAAoJEEFGbsYNeTwttuUH/A5GZi1qMz4qLbs4FDDIQeRE 21hWRP6GgjfwcEnT2rPeChx6M5r94Y+axzwFNQ2Ts18wR9aJPTU3YbbPRQQWn2LV 28wk//Nz9pdzhhTucvIW95IjLKUJvJu8bBpo7SqQOighLNQo2U1beLbLj3m97395 v8i9a/bVtmE217Gv0eNRwm4k1gxIfLfhR29694G9S3SWD2SgdKyfeKcP4BC4hYom P4L1JAVstl4y3EMRlXiPzNx9sVyUtyNFVKxDeF1nzSoxo2PKr3sRWNlUreXbCFzC wsRwJAH7v8wA/VlNonbNmwpGYzweBVDQau36A1QMQwq8sj0mUAJpHhuEiLRkSQ8= =ym0K -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
