RE: Dynamic service binding based on symbol source
Hi Massimo, thanks for the reply. Unfortunately neither of these patterns works for me because they rely on the chained service(s) being instantiated in the normal way, ie. via bind or build. Looking at DefaultModuleDefImpl there doesn't seem any reason in principle why it's too early in the bind() method of a module to late bind an implementation class based on a symbol. Or alternatively have a special form of buildX which supports this kind of thing, ie. allowing the builder to return a service definition rather than a concrete class via new. Am still looking through the sources to see what might be possible/simple. Unless I'm missing something I don't think what I'm after can be done without a change to Tapestry. Anyone disagree? Do people think this is this a reasonable feature request? Regards, Alfie. -Original Message- From: Massimo Lusetti [mailto:mluse...@gmail.com] Sent: 14 July 2009 13:47 To: Tapestry users Subject: Re: Dynamic service binding based on symbol source On Tue, Jul 14, 2009 at 2:43 PM, Alfie Kirkpatrickalfie.kirkpatr...@ioko.com wrote: I would like to instantiate a different service implementation depending on property file configuration, eg. a stub for testing and a real service for deployments. I'd like to put the FQN in my property file which is then wrapped in a SymbolProvider. I highly suggest you to build a chain of command or a strategy pattern depending on service type and let the IoC do the work for you. -- Massimo http://meridio.blogspot.com - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: T5 Page field persistance and multithread problems
2009/7/14 Howard Lewis Ship hls...@gmail.com I am loathe to have the framework manage this automatically because it causes its own problems. For example, it is reasonable to process multiple Ajax requests in parallel if they only read data. Exactly. Concurrent write access to data should be handled where it belongs and that is definitely not the weblayer as such and I wouldn't even want the webframework interfere with it. Doing things in a http-layer which naturally belong to a persistence/transaction/business layer would be a quite dirty hack in my opinion. There was a lot of research spent on making concurrent writes threadsafe in databases. Transactions, optimistic and pessimistic locking and isolation levels where developed for exactly that case. So there is really no need to make a UI-Framework behave like a database with ISOLATION_LEVEL_SERIALIZED.
Re: T5 Page field persistance and multithread problems
I suppose the framework could keep a Mutex keyed on session so that multiple page or event requests could be serialized on the server. Actually I think it is a great idea, and a pretty clean solution... thats the way Spring resolves it, its certainly not a hack. Since you create a session once it should not be such a big deal at all: http://static.springsource.org/spring/docs/2.0.x/api/org/springframework/web/util/HttpSessionMutexListener.html I am loathe to have the framework manage this automatically because it causes its own problems. For example, it is reasonable to process multiple Ajax requests in parallel if they only read data. Other than a flag that the framework will have to manage, I really don't see it being such a big deal... maybe I am naive and missing something, but do you think it is better for Tapestry users to manage this? having Atomic references and Synchronized blocks all over our code, it is easy to miss something when dealing with thread safety, and what of performance? Peter - Original Message - From: Howard Lewis Ship hls...@gmail.com To: Tapestry users users@tapestry.apache.org Sent: Tuesday, 14 July, 2009 22:08:04 GMT +02:00 Athens, Beirut, Bucharest, Istanbul Subject: Re: T5 Page field persistance and multithread problems On Tue, Jul 14, 2009 at 3:10 AM, kristjankeltkristjank...@hotmail.com wrote: Hi, Peter Stavrinides wrote: Kristjan, as Nille has explained to you that is simply not the case, what is happening is multiple requests are being generated when the submit button is clicked more than once, each of these Requests spawns a new thread, and triggers the events that modify the affected values accordingly. I suppose the framework could keep a Mutex keyed on session so that multiple page or event requests could be serialized on the server. I am loathe to have the framework manage this automatically because it causes its own problems. For example, it is reasonable to process multiple Ajax requests in parallel if they only read data. Persisted objects scoped to 'session' are essentially just objects placed in the HttpSession, which is perfectly thread safe to do, so what thread problems are you referring to? Multiple threads (initiated by multiple requests) accessing the same data is definitelly thread issue - it does not go away when you say that this is multiple request issue instead and everyone else is having the same problem. Of course this problem is caused by multiple requests that are allowed to run in paralel when they should wait in the queue instead but stating this does not make the code thread safe. And of course this is really simple example that does not involve any data sent by the client - that would introduce more problems. Peter Stavrinides wrote: every page instance would have it's own *copy* of the data Although a page object itself is pooled, and a clean copy is served when its requested. That does not mean that it contains copies of state objects / data, if you peek inside the users HttpSession you will find only a single SSO (or persistent field for that matter) of any session scoped objects. So far as I understand there are no 'copies' of these objects or any other session data floating around, any persistent object in your page would simply be a 'reference' to those in the HttpSession. Let say that I have new request. What happens now is that page is taken from the pool and is initiated. During that variable is read from the session and reference of the page object private variable is set to that variable. Let assume that there was object Integer(1) in the session. Now both, session and page object private variable are referencing to the same object. Let's name this variable a counter. Let say that in the page event method (like in my example) I want to increment the counter. For that I read the object Integer(1) int (primitive) value (or this is done by compiler using autoboxing), add one to it and create new object Integer(2) and set page private variable reference to new object (Object(2)) (this happens because Integer is immutable and I can not change it's innerstate). From this moment, page and session will have different copies (and it will stay so until session reference is overridden at the end of page processing). When different thread is reading from the session then it will still see the reference to Integer(1) and it's corrensponding page object private variable reference is set to Integer(1). Now this example involved only one variable and this was immutable (you can not change it's innerstate). Having multiple variables or immutable variables (like entity beans) will introduce more problems. Regards, Kristjan Kelt -- View this message in context: http://www.nabble.com/T5-Page-field-persistance-and-multithread-problems-tp24468298p24476799.html Sent from the Tapestry - User mailing list archive at Nabble.com.
Re: Testify + Testng
It can be useful if it's injecting stateful services. If it injects them BeforeClass, then you can have state from one test affecting others. Not all services are singleton-scoped. Christian. On 2009-07-15, at 01:32 , Paul Field wrote: Hi Christian, It might make sense to have a hit annotation for Testify that follows @Inject which allows the injection to be beforeMethod or beforeClass. Unfortunately, we can't re-use the jUnit ones because (if I recall correctly) they are not suitable for Field annotation, just method. But something similar would be good. Maybe @InjectBeforeTest and @InjectBeforeSuite could do it. I'm not seeing why that would be useful. I would expect the @Inject annotation to be injecting the same object whenever it is processed - it's just a question of when that injection takes place for each instance of the test class (e.g. at the start of the test class/before each test method). JUnit (3 and I assume 4) makes a new instance of the test class to run each test method, so it makes sense to process @Inject for every test method in order to populate that new instance. TestNG makes one instance of the test class for all the test methods in it, so it makes sense to process @Inject just once using TestNG's @BeforeClass. As usual, I may have missed something so feel free to educate me :-) - Paul --- This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and delete this e- mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. Please refer to http://www.db.com/en/content/eu_disclosures.htm for additional EU corporate and regulatory disclosures. Christian Edward Gruber e-mail: christianedwardgru...@gmail.com weblog: http://www.geekinasuit.com/ - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: Testify + Testng
Great Christian ! I was about to post an issue with this. It's working perfectly now! Thanks a lot On Wed, Jul 15, 2009 at 7:25 AM, Paul Fieldpaul.fi...@db.com wrote: I have been playing with Testng and the Testify library but i am having a small issue. It seems that the injection of services occurs after the @BeforeSuite. However, it does seem reasonable to process the @Inject annotations at the start of the TestNG suite, so the latest Testify snapshot does that... I'm not very clear about how all the TestNG features interact and exactly what happens with instances of test classes so I don't know if there are any unpleasant side effects of this change - so please let me know! I've done some more testing and discovered that @BeforeSuite doesn't work with inheritance, so I've changed Testify to process @Inject annotations @BeforeClass. It is relatively simple to get @Inject processed yourself, you just call tester.injectInto(this) in your @BeforeSuite method. I've updated the documentation to give an example: http://tapestry.formos.com/nightly/tapestry-testify/#TestNG - Paul --- This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and delete this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. Please refer to http://www.db.com/en/content/eu_disclosures.htm for additional EU corporate and regulatory disclosures. - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: T5 Page field persistance and multithread problems
my2cents i also think this is a problem of the application not the web framework. though it could be handy to have some optional services in place to use. if you want to allow multiple web browser / tabs per page that manipulates http session data (=same session id) you should consider conversations. (see trails for an implementation) i'm preventing the multiple click (submit) problem by generating a new requestid that is saved to the cookie on each request. on each subsequent request the requestid from the cookie is read and validated. if it is not valid you'll be redirected to an error page. This is easily implemented with a Dispatcher and the Cookies services (provided by Tapestry). i dont have a lot of data in my session anyways. most of the the time i only have an entity id. on a submit a kind of command object / dto is created and send to my back end modules through a facade where all the transaction handling,locking, ... is done. /my2cents g, kris p.stavrini...@albourne.com 15.07.2009 09:15 Bitte antworten an Tapestry users users@tapestry.apache.org An Tapestry users users@tapestry.apache.org Kopie Thema Re: T5 Page field persistance and multithread problems I suppose the framework could keep a Mutex keyed on session so that multiple page or event requests could be serialized on the server. Actually I think it is a great idea, and a pretty clean solution... thats the way Spring resolves it, its certainly not a hack. Since you create a session once it should not be such a big deal at all: http://static.springsource.org/spring/docs/2.0.x/api/org/springframework/web/util/HttpSessionMutexListener.html I am loathe to have the framework manage this automatically because it causes its own problems. For example, it is reasonable to process multiple Ajax requests in parallel if they only read data. Other than a flag that the framework will have to manage, I really don't see it being such a big deal... maybe I am naive and missing something, but do you think it is better for Tapestry users to manage this? having Atomic references and Synchronized blocks all over our code, it is easy to miss something when dealing with thread safety, and what of performance? Peter - Original Message - From: Howard Lewis Ship hls...@gmail.com To: Tapestry users users@tapestry.apache.org Sent: Tuesday, 14 July, 2009 22:08:04 GMT +02:00 Athens, Beirut, Bucharest, Istanbul Subject: Re: T5 Page field persistance and multithread problems On Tue, Jul 14, 2009 at 3:10 AM, kristjankeltkristjank...@hotmail.com wrote: Hi, Peter Stavrinides wrote: Kristjan, as Nille has explained to you that is simply not the case, what is happening is multiple requests are being generated when the submit button is clicked more than once, each of these Requests spawns a new thread, and triggers the events that modify the affected values accordingly. I suppose the framework could keep a Mutex keyed on session so that multiple page or event requests could be serialized on the server. I am loathe to have the framework manage this automatically because it causes its own problems. For example, it is reasonable to process multiple Ajax requests in parallel if they only read data. Persisted objects scoped to 'session' are essentially just objects placed in the HttpSession, which is perfectly thread safe to do, so what thread problems are you referring to? Multiple threads (initiated by multiple requests) accessing the same data is definitelly thread issue - it does not go away when you say that this is multiple request issue instead and everyone else is having the same problem. Of course this problem is caused by multiple requests that are allowed to run in paralel when they should wait in the queue instead but stating this does not make the code thread safe. And of course this is really simple example that does not involve any data sent by the client - that would introduce more problems. Peter Stavrinides wrote: every page instance would have it's own *copy* of the data Although a page object itself is pooled, and a clean copy is served when its requested. That does not mean that it contains copies of state objects / data, if you peek inside the users HttpSession you will find only a single SSO (or persistent field for that matter) of any session scoped objects. So far as I understand there are no 'copies' of these objects or any other session data floating around, any persistent object in your page would simply be a 'reference' to those in the HttpSession. Let say that I have new request. What happens now is that page is taken from the pool and is initiated. During that variable is read from the session and reference of the page object private variable is set to that variable. Let assume that there was object Integer(1) in the session. Now both, session and page object private variable are referencing to the same object. Let's
Re: Problems deploying tapestry App in Tomcat 5.x/6.x
For anyone that uses Chenillekit, you should probably include an exclusion to prevent the 2 conflicting versions of javassist appearing on your classpath: dependency groupIdorg.chenillekit/groupId artifactIdchenillekit-tapestry/artifactId version1.0.0/version exclusions exclusion groupIdjboss/groupId artifactIdjavassist/artifactId /exclusion /exclusions /dependency Peter - Original Message - From: jose luis sanchez joseluis.sanc...@m-centric.com To: Tapestry users users@tapestry.apache.org Sent: Tuesday, 14 July, 2009 10:51:29 GMT +02:00 Athens, Beirut, Bucharest, Istanbul Subject: Re: Problems deploying tapestry App in Tomcat 5.x/6.x Yes, that was the problem !! Thanks .. now, i have excluded the javassist that chenillekit depends on .. and old one, and everything looks and works ok :-) Maybe you have dublicate javassist jar in your classpath. - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
RE: Dynamic service binding based on symbol source
Further to my last mail I think it could be possible to have a module
method convention like:
public static com.acme.service.MyService bindByConfiguration() {
}
This would look for a symbol com.acme.service.MyService based on the
return type and use a variant on the ConstructorServiceCreator to
instantiate the service.
Or perhaps a ServiceBinder.bind(MyService.class,
the.symbol.name.for.impl.class) method would work. It seems a bit
tidier.
Either should be possible since ServiceBuilderMethodInvoker is able to
resolve symbols as parameters via
InternalUtils.calculateParametersForMethod. It's just that the current
code/encapsulation level isn't really geared for what I want to do -- I
need a bit of both ConstructorServiceCreator and
ServiceBuilderMethodInvoker. But I'll keep digging.
Regards, Alfie.
-Original Message-
From: Massimo Lusetti [mailto:mluse...@gmail.com]
Sent: 14 July 2009 13:47
To: Tapestry users
Subject: Re: Dynamic service binding based on symbol source
On Tue, Jul 14, 2009 at 2:43 PM, Alfie
Kirkpatrickalfie.kirkpatr...@ioko.com wrote:
I would like to instantiate a different service implementation
depending
on property file configuration, eg. a stub for testing and a real
service for deployments. I'd like to put the FQN in my property file
which is then wrapped in a SymbolProvider.
I highly suggest you to build a chain of command or a strategy pattern
depending on service type and let the IoC do the work for you.
--
Massimo
http://meridio.blogspot.com
-
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Re: T5 Page field persistance and multithread problems
2009/7/15 p.stavrini...@albourne.com Other than a flag that the framework will have to manage, I really don't see it being such a big deal... maybe I am naive and missing something, but do you think it is better for Tapestry users to manage this? having Atomic references and Synchronized blocks all over our code, it is easy to miss something when dealing with thread safety, and what of performance? Peter For what would you need that (atomic refs and synchronized blocks)? The above example is completely artificial. It doesn't make any sense (in a webapp) to write data which you don't persist in some way. When you start using the session with writable objects there is very probably a flaw in your design. Take a user object for example. Let's assume you have a manger user with editing rights which shows some malicious behaviour. An admin jumps in and disables the user in the database to prevent future damage while the manager is logged in. Now this manager has his user object alongside with his access rights in his own session for convenient access and your code relies on that session... Until his session expires he can still do anything the admin wanted to prevent. To overcome this reliably there is no way around reading the user object from the datastore on every request. This sounds worse than it is, since all modern datastores have caches, and it is in any circumstance better than throwing the user around in the session. @Persist(session) and @SessionState really only make sense for read-only data or data which doesn't need to be guarded against concurrent write-access like temporary state. For example two users works on an invoice in a billing system and alter different data. When the first one submits it is committed to database. When the second one commits the database throws an exception, when optimistic locking is on. But it would be a good idea to have the second users temporary data @Persist ed since now you can catch the exception and show the differences between the committed version and his version for information and let him think about and alter his input before he commits his final version. It's not only in MMOs where you should never ever trust the client (and thus his session).
Re: T5 Page field persistance and multithread problems
I don't agree with your implication that a user should only be reading from the session, one example I am using is a wizard that uses an SSO over a few pages, once all steps are completed only then is the data written to the database and the SSO is discarded, using an SSO for this is natural choice imho, but even that is beside the point Otto, as I have mentioned already I don't think its a big deal since it is unlikely (although not impossible) that you will have concurrency problems accessing the HttpSession, the original issue in question is the multiple threads modifying persistent data, a 'get - modify - set' pattern, which then has the potential to be wrong when re-reading the value. Peter - Original Message - From: Otho taa...@googlemail.com To: Tapestry users users@tapestry.apache.org Sent: Wednesday, 15 July, 2009 11:43:23 GMT +02:00 Athens, Beirut, Bucharest, Istanbul Subject: Re: T5 Page field persistance and multithread problems 2009/7/15 p.stavrini...@albourne.com Other than a flag that the framework will have to manage, I really don't see it being such a big deal... maybe I am naive and missing something, but do you think it is better for Tapestry users to manage this? having Atomic references and Synchronized blocks all over our code, it is easy to miss something when dealing with thread safety, and what of performance? Peter For what would you need that (atomic refs and synchronized blocks)? The above example is completely artificial. It doesn't make any sense (in a webapp) to write data which you don't persist in some way. When you start using the session with writable objects there is very probably a flaw in your design. Take a user object for example. Let's assume you have a manger user with editing rights which shows some malicious behaviour. An admin jumps in and disables the user in the database to prevent future damage while the manager is logged in. Now this manager has his user object alongside with his access rights in his own session for convenient access and your code relies on that session... Until his session expires he can still do anything the admin wanted to prevent. To overcome this reliably there is no way around reading the user object from the datastore on every request. This sounds worse than it is, since all modern datastores have caches, and it is in any circumstance better than throwing the user around in the session. @Persist(session) and @SessionState really only make sense for read-only data or data which doesn't need to be guarded against concurrent write-access like temporary state. For example two users works on an invoice in a billing system and alter different data. When the first one submits it is committed to database. When the second one commits the database throws an exception, when optimistic locking is on. But it would be a good idea to have the second users temporary data @Persist ed since now you can catch the exception and show the differences between the committed version and his version for information and let him think about and alter his input before he commits his final version. It's not only in MMOs where you should never ever trust the client (and thus his session). - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
RE: t5: moving to 5.1.0.5 and can't find @Inject
I actually have M2 already installed. I hadn't looked at the dependency
feature in the editor - thanks Thiago.
I now know tapestry-ioc-5.0.18.jar is being used by Chenillekit.
However, I am still unable to locate:
org.apache.tapestry5.ioc.annotations.Inject
It just doesn't exist - anywhere!
Could someone please tell me in which JAR file it is supposed to be? It
isn't in tapestry-ioc-5.0.18.jar (which is the only version of
tapestry-ioc-xxx that Maven is downloading) as far as I can see.
I don't understand why moving to 5.1.0.5 has caused this problem nor do
I understand why @Inject has disappeared as it obviously existed before;
I've been quite happily using that annotation throughout my project!
If it would help to show my project POM I can post it...
Thanks.
-Original Message-
From: Thiago H. de Paula Figueiredo [mailto:thiag...@gmail.com]
Sent: 14 July 2009 14:58
To: Tapestry users
Subject: Re: t5: moving to 5.1.0.4 and can't find @Inject
Em Tue, 14 Jul 2009 10:19:49 -0300, Newham, Cameron
cameron.new...@bl.uk
escreveu:
If I don't include:
dependency
groupIdorg.apache.tapestry/groupId
artifactIdtapestry-ioc/artifactId
version${tapestry-release-version}/version
/dependency
In the POM I get 5.1.0.5 for all jars *except* tapestry-ioc which
always
downloads the 5.0.18 version /:-(
This looks like some other package you're using depends on Tapestry-IoC
5.0.18. If you're using Eclipse, install the Sonatype's m2eclipse
plugin.
In its Maven pom.xml editor, it has a very nice feature that shows what
dependencies are being included and by which dependency (transitive
dependency).
--
Thiago H. de Paula Figueiredo
Independent Java consultant, developer, and instructor
http://www.arsmachina.com.br/thiago
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RE: Dynamic service binding based on symbol source
hi alfie,
i don't know if i'm missing something but you could
solve it this way:
public Service buildService(@Inject @Sysmbol(whatever) Long numeric,
@InjectService(VariantA) Service serviceA, @InjectService(VariantB)
Service serviceB)
{
switch(numeric)
{
case 2: return serviceA;
case 42: return serviceB;
default:
throw new Exception();
}
}
if you want to use the Service without qualifier you
could define another inteface for the variants
g,
kris
Alfie Kirkpatrick alfie.kirkpatr...@ioko.com
15.07.2009 10:42
Bitte antworten an
Tapestry users users@tapestry.apache.org
An
Massimo Lusetti mluse...@gmail.com, Tapestry users
users@tapestry.apache.org
Kopie
Thema
RE: Dynamic service binding based on symbol source
Further to my last mail I think it could be possible to have a module
method convention like:
public static com.acme.service.MyService
bindByConfiguration() {
}
This would look for a symbol com.acme.service.MyService based on the
return type and use a variant on the ConstructorServiceCreator to
instantiate the service.
Or perhaps a ServiceBinder.bind(MyService.class,
the.symbol.name.for.impl.class) method would work. It seems a bit
tidier.
Either should be possible since ServiceBuilderMethodInvoker is able to
resolve symbols as parameters via
InternalUtils.calculateParametersForMethod. It's just that the current
code/encapsulation level isn't really geared for what I want to do -- I
need a bit of both ConstructorServiceCreator and
ServiceBuilderMethodInvoker. But I'll keep digging.
Regards, Alfie.
-Original Message-
From: Massimo Lusetti [mailto:mluse...@gmail.com]
Sent: 14 July 2009 13:47
To: Tapestry users
Subject: Re: Dynamic service binding based on symbol source
On Tue, Jul 14, 2009 at 2:43 PM, Alfie
Kirkpatrickalfie.kirkpatr...@ioko.com wrote:
I would like to instantiate a different service implementation
depending
on property file configuration, eg. a stub for testing and a real
service for deployments. I'd like to put the FQN in my property file
which is then wrapped in a SymbolProvider.
I highly suggest you to build a chain of command or a strategy pattern
depending on service type and let the IoC do the work for you.
--
Massimo
http://meridio.blogspot.com
-
To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
For additional commands, e-mail: users-h...@tapestry.apache.org
RE: t5: moving to 5.1.0.5 and can't find @Inject
@Inject is located in tapestry5-annotations-5.1.0.5.jar
steps i have in mind
1) have you run mvn eclipse:eclipse... it will add any maven
dependency as external library. remove all entries except
the JRE entry and the Maven Dependencies entry.
2) deactivate the maven offline mode and do a dependency
update
g,
kris
Newham, Cameron cameron.new...@bl.uk
15.07.2009 11:56
Bitte antworten an
Tapestry users users@tapestry.apache.org
An
Tapestry users users@tapestry.apache.org
Kopie
Thema
RE: t5: moving to 5.1.0.5 and can't find @Inject
I actually have M2 already installed. I hadn't looked at the dependency
feature in the editor - thanks Thiago.
I now know tapestry-ioc-5.0.18.jar is being used by Chenillekit.
However, I am still unable to locate:
org.apache.tapestry5.ioc.annotations.Inject
It just doesn't exist - anywhere!
Could someone please tell me in which JAR file it is supposed to be? It
isn't in tapestry-ioc-5.0.18.jar (which is the only version of
tapestry-ioc-xxx that Maven is downloading) as far as I can see.
I don't understand why moving to 5.1.0.5 has caused this problem nor do
I understand why @Inject has disappeared as it obviously existed before;
I've been quite happily using that annotation throughout my project!
If it would help to show my project POM I can post it...
Thanks.
-Original Message-
From: Thiago H. de Paula Figueiredo [mailto:thiag...@gmail.com]
Sent: 14 July 2009 14:58
To: Tapestry users
Subject: Re: t5: moving to 5.1.0.4 and can't find @Inject
Em Tue, 14 Jul 2009 10:19:49 -0300, Newham, Cameron
cameron.new...@bl.uk
escreveu:
If I don't include:
dependency
groupIdorg.apache.tapestry/groupId
artifactIdtapestry-ioc/artifactId
version${tapestry-release-version}/version
/dependency
In the POM I get 5.1.0.5 for all jars *except* tapestry-ioc which
always
downloads the 5.0.18 version /:-(
This looks like some other package you're using depends on Tapestry-IoC
5.0.18. If you're using Eclipse, install the Sonatype's m2eclipse
plugin.
In its Maven pom.xml editor, it has a very nice feature that shows what
dependencies are being included and by which dependency (transitive
dependency).
--
Thiago H. de Paula Figueiredo
Independent Java consultant, developer, and instructor
http://www.arsmachina.com.br/thiago
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Re: Dynamic service binding based on symbol source
Why wouldn't a buildXXX() method injecting the symbol as a parameter and some ifs or switch statements work in your scenario? -- Thiago H. de Paula Figueiredo Independent Java consultant, developer, and instructor http://www.arsmachina.com.br/thiago - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: Dynamic service binding based on symbol source
hi Alfie, i think i understand your problem in such situations i define a service with a dummy implementation. now another module can override the service with a correct implementation. its also useful to break up cyclic dependencies. lets say if have a security module that provides a SubjectService. because the user data is managed by another module that itself depends on the security module i cannot have a SubjectService implementation within the security module that loads the user data (using the user module services). Instead i have a dummy implementation that throws an exception. only if the user module is deployed it will override this dummy implementation with a proper one. (see ServiceOverride for more details) in other circumstances i have a chain with a defined interface any other module can contribute to. now when i build the services (builder method) i delegate it to the chain and it will return the appropriate implementation. so a chain element can decide to return a specific implementation if it needs to and stop the chain. i hope this helps g, kris Thiago H. de Paula Figueiredo thiag...@gmail.com 15.07.2009 14:18 Bitte antworten an Tapestry users users@tapestry.apache.org An Tapestry users users@tapestry.apache.org Kopie Thema Re: Dynamic service binding based on symbol source Why wouldn't a buildXXX() method injecting the symbol as a parameter and some ifs or switch statements work in your scenario? -- Thiago H. de Paula Figueiredo Independent Java consultant, developer, and instructor http://www.arsmachina.com.br/thiago - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: How do you display a HashMapString, ArrayListobject in a .tml table
Hello Igor,
Thank you for the reply, What I've implemented so far is I've converted the
hashmap keys and values to their respective collection types. but when I
pass either one of them to the grid component it displays the number of
objects passed but none of the information is passed. below is the code that
i have written for the display page.
So say for example i wanted to display just the keys i would pass the
issueKeys collection to the grid component correct? but it just displays as
aforementioned, an empty grid header with a false value in each row.
Side note:
this gird is being populated based on set of selections made on a grid that
was displayed on a previous page. I've debugged the information flow and i
can see the the HashMap is passed to this page and I see that the enclosed
ArrayList has information as well, its just Im not sure if perhaps the
information is getting lost at some point during the display of this grid?
Or maybe the accessor object that the component uses? Honestly I'm at a loss
as to what is going on...
public class Contact
{
@ApplicationState
private jiraDataSource jDO;
private HashMap String, ArrayListIssue issuesList;
private CollectionArrayListIssue issuesSet;
private CollectionString issueKeys;
private String issueKey;
private Issue issue;
void onActivate()
{
issuesList =jDO.getAllIssuesLists();
}
public void setIssuesList(HashMap String, ArrayListIssue issuesList)
{
this.issuesList = issuesList;
}
public HashMap String, ArrayListIssue getIssuesList()
{
return issuesList;
}
public Collection String getIssueKeys()
{
issueKeys = issuesList.keySet();
return issueKeys;
}
public CollectionArrayListIssue getIssuesSet()
{
issuesSet = issuesList.values();
return issuesSet;
}
public String getIssueKey()
{
return issueKey;
}
public Issue getIssue()
{
return issue;
}
public void setIssue(Issue i)
{
this.issue = i;
}
}
this is the page class its coming from:
public class About
{
@ApplicationState
private jiraDataSource jiraDO;
private Filter filter;
@InjectPage
private Contact contact;
public List Filter getAllFilters()
{
return jiraDO.getAllFilters();
}
public Filter getFilter()
{
return filter;
}
public void setFilter(Filter f)
{
this.filter = f;
}
@OnEvent(value=checkbox)
void CheckboxClick()
{
System.out.println(a Checkbox was clicked);
}
@OnEvent(value=submit)
Object tromSubmit()
{
System.out.println(submission made);
HashMap String, ArrayListIssue issuesList =
jiraDO.getAllIssuesLists();
contact.setIssuesList(issuesList);
return contact;
}
}
Igor Drobiazko wrote:
Just convert your Map into a GridDataSource which you pass to the
component.
Take a look at Tapestry's internal implementation of GridDataSource which
is
constructed from a collection.
http://tapestry.formos.com/nightly/tapestry5/apidocs/src-html/org/apache/tapestry5/internal/grid/CollectionGridDataSource.html#line.29
You can also provide a type coercion from a Map to GridDataSource or to
Collection. Tapestry will do the coercion for you.
On Wed, Jul 15, 2009 at 4:35 AM, cajmrn caj...@gmail.com wrote:
Hello all,
I am once again stuck and unsure as to how to implement the following. I
have a HashMap that contains a String id for the Key and an ArrayList as
the
value. What I need to do is to display in a table or grid each arrayList
as
it corresponds to a Key.
How would you go about iterating first through the the id and implement
it
as a table header for example, then iterate through its corresponding
ArrayList? Basically nesting the loops... Sort or like generating a table
for each entry in the HashMap. Or if it could be implemented in one table
that should be fine as well.
Any help would be greatly appreciated.
Thanks,
Carlo
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T5 Asset URLs
Hi,
For a while now, I've been happily including images in my pages like so:
img src=${context:images/blah.jpg}
This has worked quite well, but when I view the image in my browser, I'm
taken to /[project name]/assets/ctx/1.0-SNAPSHOT/images/blah.jpg. I've read
that this is to aid the browser in aggressive caching, but is there anyway I
can strip the /assets/ctx/[project version] bit out of the URLs regardless?
Thanks,
John
Re: How to inform a user that a form is submitted?
What about writing the number of iteration 0 forms submitted, 1 form submitted, 2 forms submitted and so on. You can also show the latest submit was at 15:56 message. - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
setting up maven in eclipse
Hi all, Another question: I began my tapestry project by following these instructions: http://tapestry.apache.org/tapestry5/quickstart/ . Then after running mvn package, I imported the .war file into eclipse and have been working with that project ever since. (I'm not entirely sure why I did it this way. I think I was more or less following the instructions from the Kolesnikov book). They key result of this is that my pom.xml file is located at WebContent/META-INF/maven/[project group]/[project name]/pom.xml. Now I'm trying to get Hibernate working, and it seems like the easiest way to do this is by adding dependencies to the pom.xml file and then getting the Maven Eclipse plugin to magically pull down all of the new .jar files. Unfortunately it doesn't seem to be working that way. The plugin doesn't recognize that my project even has a pom.xml file, and it forces me add a new one (located at the project root by default) to get the .jars. So before I proceed further and muck things up even more, does anyone have any advice on how to get the maven eclipse plugin to recognize that my project is actually a maven project? Thanks for the help, John
How should missing page context be handled?
lets say I have a view product page which expects the product id in
its context. The URL for this might look like
http://app-root/product/view/12345;.
What is the best way to detect if the user modifies their URL to
http://app-root/product/view; without the context?
The only way I've found is to do something like the following:
public class ViewProduct {
@Property
private Product product;
Object onActivate() {
if( product == null ) {
return RedirectPage.class;
}
return null;
}
void onActivate( Product product ) {
this.product = product;
}
}
I found that only onActivate() gets called when the context is
missing, but that both of them are called if the context is present.
The order of exection is as follows:
onActivate(Product)
onActivate()
This leads me into a second question: Is this the way it is supposed
to behave (it seems wierd to me), and if so why is this the preferred
behavior?
Also, returning to my original question, is this the best way to
handle pages without context? It seems like there should be a better
way.
Thanks in advance,
pete.pou...@gmail.com
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Re: Log remote IP address with MDC class?
Hi,
Have a try with
public RequestFilter buildRequestLoggingFilter(RequestGlobals requestGlobals){
}
, requestGlobals has the HttpServletRequest.
DH
http://www.gaonline.com.cn
- Original Message -
From: learningtapestry satish...@yahoo.com
To: users@tapestry.apache.org
Sent: Thursday, July 16, 2009 9:33 AM
Subject: Log remote IP address with MDC class?
Is there any way to log the remote IP address using the log4j MDC. If I
contribute to RequestHandler inside my AppModule, I have a way of getting a
hold of the org.apache.tapestry5.services.Request, but from this Request,
there isn't no way of getting the IP address of the remote machine.
I don't want to add this my pages/components for various reasons.
public RequestFilter buildRequestLoggingFilter(){
return new RequestFilter(){
public boolean service(Request request, Response response,
RequestHandler handler) throws IOException {
MDC.put(remoteIP, );
return handler.service(request, response);
}
};
}
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