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Posted to users@tomcat.apache.org by randeelwrw <ra...@yahoo.com> on 2007/07/09 06:05:46 UTC
about tomcat
hi everyone,
can i use two tomcat webservers to exchange information between them?
how can i do that?
thank you,
rana.
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Re: about tomcat
Posted by David Smith <dn...@cornell.edu>.
Tomcat can act as a client to another tomcat. See
http://jakarta.apache.org/commons/httpclient/ for a library supporting this.
--David
Johnny Kewl wrote:
> No, I dont think so, a web server is not a client, and unless you
> really have to work on port 80, it would be much easier to just to use
> JDBC to exchange records. ie open 2 database connections, read from
> one and write to the other, this way you can also use tranactions and
> ensure the integrity.
>
> If you talking about a real time replication system, ie the databases
> must stay aligned, its alot more complex than simply writing a few
> records.
>
> If its something like updating the status say once a week, then a web
> server may do.
> For example you make a cache or disconnected recordset in the servlet,
> this gets sent to a client, and it updates the dB on the other side. A
> cache is serializable, so that would work.
>
> If you use PostgreSQL, I may be able to help you, I have a replication
> system for that, but its not on port 80.
> Its not enough to just say I got two dB's.... you need to explain the
> desired system.
> Using a WEB server to send a cached recorset to a client, that then
> sticks it in a local embedded dB and uses the data, is one thing.
> Replication is another story.
>
> ----- Original Message ----- From: "randeelwrw" <ra...@yahoo.com>
> To: <us...@tomcat.apache.org>
> Sent: Monday, July 09, 2007 6:49 AM
> Subject: Re: about tomcat
>
>
>>
>> thank you for the reply.
>> what i really need to do is transfer records from one database to
>> another database.so in the middle there would be two web servers.
>> is this a good idea?
>>
>>
>>
>> Stephen.Morris wrote:
>>>
>>>
>>>
>>>
>>> Yes, it is possible to run two servers as a cluster and exchange
>>> information between them. I have seen an article on the internet
>>> recently
>>> on doing exactly this. The easiest way of finding out how to do this
>>> is to
>>> use Googles advanced search and to type 'tomcat clustering' into the
>>> exact
>>> phrase textbox, which should return about 19,700 hits. It is then a
>>> matter
>>> of just selecting the article that is most relevant to what you are
>>> trying
>>> to do.
>>>
>>> regards,
>>> Steve Morris
>>> IT Security Access Management
>>> Technology Risk and Security
>>> Technology Australia
>>> National Australia Bank
>>> Phone: +61-3-8634 1755 (x31755)
>>> Mobile: +0438 537 569
>>> email: Stephen.Morris@nab.com.au
>>>
>>>
>>>
>>> randeelwrw
>>> <randeelwrw@yahoo
>>> .com> To
>>> users@tomcat.apache.org
>>> 09/07/2007 14:05 cc
>>>
>>>
>>> Subject
>>> Please respond to about tomcat
>>> "Tomcat Users
>>> List"
>>> <users@tomcat.apa
>>> che.org>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> hi everyone,
>>>
>>> can i use two tomcat webservers to exchange information between them?
>>> how can i do that?
>>>
>>> thank you,
>>> rana.
>>> --
>>> View this message in context:
>>> http://www.nabble.com/about-tomcat-tf4047066.html#a11495638
>>> Sent from the Tomcat - User mailing list archive at Nabble.com.
>>>
>>>
>>> ---------------------------------------------------------------------
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>>>
>>>
>>>
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>>> postmaster@nab.com.au
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>>> email is
>>> free of errors, viruses or interference.
>>>
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>>>
>>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/about-tomcat-tf4047066.html#a11495951
>> Sent from the Tomcat - User mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
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>>
>
>
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Re: about tomcat
Posted by Johnny Kewl <jo...@kewlstuff.co.za>.
No, I dont think so, a web server is not a client, and unless you really
have to work on port 80, it would be much easier to just to use JDBC to
exchange records. ie open 2 database connections, read from one and write to
the other, this way you can also use tranactions and ensure the integrity.
If you talking about a real time replication system, ie the databases must
stay aligned, its alot more complex than simply writing a few records.
If its something like updating the status say once a week, then a web server
may do.
For example you make a cache or disconnected recordset in the servlet, this
gets sent to a client, and it updates the dB on the other side. A cache is
serializable, so that would work.
If you use PostgreSQL, I may be able to help you, I have a replication
system for that, but its not on port 80.
Its not enough to just say I got two dB's.... you need to explain the
desired system.
Using a WEB server to send a cached recorset to a client, that then sticks
it in a local embedded dB and uses the data, is one thing.
Replication is another story.
----- Original Message -----
From: "randeelwrw" <ra...@yahoo.com>
To: <us...@tomcat.apache.org>
Sent: Monday, July 09, 2007 6:49 AM
Subject: Re: about tomcat
>
> thank you for the reply.
> what i really need to do is transfer records from one database to
> another database.so in the middle there would be two web servers.
> is this a good idea?
>
>
>
> Stephen.Morris wrote:
>>
>>
>>
>>
>> Yes, it is possible to run two servers as a cluster and exchange
>> information between them. I have seen an article on the internet recently
>> on doing exactly this. The easiest way of finding out how to do this is
>> to
>> use Googles advanced search and to type 'tomcat clustering' into the
>> exact
>> phrase textbox, which should return about 19,700 hits. It is then a
>> matter
>> of just selecting the article that is most relevant to what you are
>> trying
>> to do.
>>
>> regards,
>> Steve Morris
>> IT Security Access Management
>> Technology Risk and Security
>> Technology Australia
>> National Australia Bank
>> Phone: +61-3-8634 1755 (x31755)
>> Mobile: +0438 537 569
>> email: Stephen.Morris@nab.com.au
>>
>>
>>
>> randeelwrw
>> <randeelwrw@yahoo
>> .com>
>> To
>> users@tomcat.apache.org
>> 09/07/2007 14:05
>> cc
>>
>>
>> Subject
>> Please respond to about tomcat
>> "Tomcat Users
>> List"
>> <users@tomcat.apa
>> che.org>
>>
>>
>>
>>
>>
>>
>>
>> hi everyone,
>>
>> can i use two tomcat webservers to exchange information between them?
>> how can i do that?
>>
>> thank you,
>> rana.
>> --
>> View this message in context:
>> http://www.nabble.com/about-tomcat-tf4047066.html#a11495638
>> Sent from the Tomcat - User mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>>
>>
>> National Australia Bank Ltd - ABN 12 004 044 937
>> This email may contain confidential information. If you are not the
>> intended recipient, please immediately notify us at postmaster@nab.com.au
>> or by replying to the sender, and then destroy all copies of this email.
>> Except where this email indicates otherwise, views expressed in this
>> email
>> are those of the sender and not of National Australia Bank Ltd. Advice in
>> this email does not take account of your objectives, financial situation,
>> or needs. It is important for you to consider these matters and, if the
>> e-mail refers to a product(s), you should read the relevant Product
>> Disclosure Statement(s)/other disclosure document(s) before making any
>> decisions. If you do not want email marketing from us in future, forward
>> this email with "unsubscribe" in the subject line to
>> Unsubscriptions@nab.com.au in order to stop marketing emails from this
>> sender. National Australia Bank Ltd does not represent that this email is
>> free of errors, viruses or interference.
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>>
>
> --
> View this message in context:
> http://www.nabble.com/about-tomcat-tf4047066.html#a11495951
> Sent from the Tomcat - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
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Re: about tomcat
Posted by randeelwrw <ra...@yahoo.com>.
thank you for the reply.
what i really need to do is transfer records from one database to
another database.so in the middle there would be two web servers.
is this a good idea?
Stephen.Morris wrote:
>
>
>
>
> Yes, it is possible to run two servers as a cluster and exchange
> information between them. I have seen an article on the internet recently
> on doing exactly this. The easiest way of finding out how to do this is to
> use Googles advanced search and to type 'tomcat clustering' into the exact
> phrase textbox, which should return about 19,700 hits. It is then a matter
> of just selecting the article that is most relevant to what you are trying
> to do.
>
> regards,
> Steve Morris
> IT Security Access Management
> Technology Risk and Security
> Technology Australia
> National Australia Bank
> Phone: +61-3-8634 1755 (x31755)
> Mobile: +0438 537 569
> email: Stephen.Morris@nab.com.au
>
>
>
> randeelwrw
> <randeelwrw@yahoo
> .com> To
> users@tomcat.apache.org
> 09/07/2007 14:05 cc
>
> Subject
> Please respond to about tomcat
> "Tomcat Users
> List"
> <users@tomcat.apa
> che.org>
>
>
>
>
>
>
>
> hi everyone,
>
> can i use two tomcat webservers to exchange information between them?
> how can i do that?
>
> thank you,
> rana.
> --
> View this message in context:
> http://www.nabble.com/about-tomcat-tf4047066.html#a11495638
> Sent from the Tomcat - User mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
>
>
> National Australia Bank Ltd - ABN 12 004 044 937
> This email may contain confidential information. If you are not the
> intended recipient, please immediately notify us at postmaster@nab.com.au
> or by replying to the sender, and then destroy all copies of this email.
> Except where this email indicates otherwise, views expressed in this email
> are those of the sender and not of National Australia Bank Ltd. Advice in
> this email does not take account of your objectives, financial situation,
> or needs. It is important for you to consider these matters and, if the
> e-mail refers to a product(s), you should read the relevant Product
> Disclosure Statement(s)/other disclosure document(s) before making any
> decisions. If you do not want email marketing from us in future, forward
> this email with "unsubscribe" in the subject line to
> Unsubscriptions@nab.com.au in order to stop marketing emails from this
> sender. National Australia Bank Ltd does not represent that this email is
> free of errors, viruses or interference.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
>
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Re: about tomcat
Posted by St...@nab.com.au.
I would have thought this wouldn't be a problem as long as the db queries
returned a concise list of records for transfer. If the queries returned
large volumes of transactions your "network" could very quickly become
clogged and unusable.
regards,
Steve Morris
IT Security Access Management
Technology Risk and Security
Technology Australia
National Australia Bank
Phone: +61-3-8634 1755 (x31755)
Mobile: +0438 537 569
email: Stephen.Morris@nab.com.au
randeelwrw
<randeelwrw@yahoo
.com> To
users@tomcat.apache.org
09/07/2007 14:51 cc
Subject
Please respond to about tomcat
"Tomcat Users
List"
<users@tomcat.apa
che.org>
hi everyone,
can i use two tomcat webservers to exchange information between them?
how can i do that?
what i really need to do is transfer records from one database to
another database.so in the middle there would be two web servers.
is this a good idea?
thank you,
rana.
--
View this message in context:
http://www.nabble.com/about-tomcat-tf4047066.html#a11495638
Sent from the Tomcat - User mailing list archive at Nabble.com.
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
National Australia Bank Ltd - ABN 12 004 044 937
This email may contain confidential information. If you are not the intended recipient, please immediately notify us at postmaster@nab.com.au or by replying to the sender, and then destroy all copies of this email. Except where this email indicates otherwise, views expressed in this email are those of the sender and not of National Australia Bank Ltd. Advice in this email does not take account of your objectives, financial situation, or needs. It is important for you to consider these matters and, if the e-mail refers to a product(s), you should read the relevant Product Disclosure Statement(s)/other disclosure document(s) before making any decisions. If you do not want email marketing from us in future, forward this email with "unsubscribe" in the subject line to Unsubscriptions@nab.com.au in order to stop marketing emails from this sender. National Australia Bank Ltd does not represent that this email is free of errors, viruses or interference.
---------------------------------------------------------------------
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Re: about tomcat
Posted by St...@nab.com.au.
Yes, it is possible to run two servers as a cluster and exchange
information between them. I have seen an article on the internet recently
on doing exactly this. The easiest way of finding out how to do this is to
use Googles advanced search and to type 'tomcat clustering' into the exact
phrase textbox, which should return about 19,700 hits. It is then a matter
of just selecting the article that is most relevant to what you are trying
to do.
regards,
Steve Morris
IT Security Access Management
Technology Risk and Security
Technology Australia
National Australia Bank
Phone: +61-3-8634 1755 (x31755)
Mobile: +0438 537 569
email: Stephen.Morris@nab.com.au
randeelwrw
<randeelwrw@yahoo
.com> To
users@tomcat.apache.org
09/07/2007 14:05 cc
Subject
Please respond to about tomcat
"Tomcat Users
List"
<users@tomcat.apa
che.org>
hi everyone,
can i use two tomcat webservers to exchange information between them?
how can i do that?
thank you,
rana.
--
View this message in context:
http://www.nabble.com/about-tomcat-tf4047066.html#a11495638
Sent from the Tomcat - User mailing list archive at Nabble.com.
---------------------------------------------------------------------
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National Australia Bank Ltd - ABN 12 004 044 937
This email may contain confidential information. If you are not the intended recipient, please immediately notify us at postmaster@nab.com.au or by replying to the sender, and then destroy all copies of this email. Except where this email indicates otherwise, views expressed in this email are those of the sender and not of National Australia Bank Ltd. Advice in this email does not take account of your objectives, financial situation, or needs. It is important for you to consider these matters and, if the e-mail refers to a product(s), you should read the relevant Product Disclosure Statement(s)/other disclosure document(s) before making any decisions. If you do not want email marketing from us in future, forward this email with "unsubscribe" in the subject line to Unsubscriptions@nab.com.au in order to stop marketing emails from this sender. National Australia Bank Ltd does not represent that this email is free of errors, viruses or interference.
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