Hi all, For a demo I'm giving next week, I'd like to show how to use distributed streams via a remote server task. All server tasks that we have in testsuite rely on primitives but in my case I wanted to use POJOs. To do that, I needed to get compatibility mode working in such way that those POJOs could be unmarshalled for the server task. Since in another demo I'm showing Protostream based POJOs, I thought I'd try to use that as mechanism to unmarshall POJOs server side. We have a test for such scenario [1], but the reality (running on a proper server) is anything that simple. Here's a list of things I've found out while creating a WordCount example that relies on a POJO: 1. Out of the box, it's impossible to set compatibility marshaller to org.infinispan.query.remote.CompatibilityProtoStreamMarshaller [1] because "org.infinispan.main" classloader can't access that class. I worked around that by tweaking the module.xml to have an optional dependency to "org.infinispan.remote-query.server" module. 2. After doing that, I had to register the protofile and associated classes remotely in the server. Again, there's no out of the box mechanism for that, so I created a remote server task that would do that [3]. 3. Finally, with all that in place, I was able to complete the WordCount test [4] with a final caveat: the return of the word count, and words protofile registration, tasks return objects that are not marshalled by the compatibility marshaller, so I had to make sure that the remote cache manager used for those tasks uses the default marshaller. Clearly we need to improve on this, and we have plans to address these issues (with new upcoming transcoding capabilities), but I thought it'd be worth mentioning the problems found in case anyone else encounters them before transcoding is in place. Cheers, [1] https://github.com/galderz/datagrid-patterns/blob/master/server-config/do... [2] https://github.com/galderz/datagrid-patterns/blob/master/server-config/or... [3] https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... [4] https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... -- Galder Zamarreño Infinispan, Red Hat _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev

Hey Ramesh, I don't know your use case very well, so allow me to ask you some qs: 1. When does your marshaller come into play? At the compatibility layer? Or is it used as a client marshaller? 1a. If it's at the compatibility layer, why can't you use CompatibilityProtoStreamMarshaller? Your description below makes it sound like your marshaller does similar work to CompatibilityProtoStreamMarshaller, hence the questions and see whether it could fit your use case. Cheers, -- Galder Zamarreño Infinispan, Red Hat > On 30 Mar 2017, at 16:30, Ramesh Reddy <rareddy(a)redhat.com&gt; wrote: > > Glader, > > FWIW, I am rewriting Teiid translator to Infinispan, where I needed a > portable marshaller that is simply based on .proto file as you describe > issues with your step #2. The use of predefined custom java marshaller is > not viable in my usecase, as I want to dynamically convert Relational > Tables defined in the Teiid into POJO's in Infinispan, and ability to > query them. I have written a such marshaller for my usecase you can see > testcase at [1]. Basically I capture the metadata from .proto file and use > that information in encoding/decoding the protostream, *most* of the > needed code is already there in the ProtoStream libraries. > > BTW, with your Task example you gave me another idea how I can even further > enhance the this integration layer in terms of updating multiple POJOs in > single call :) > > Ramesh.. > > [1] > https://github.com/rareddy/infinispan/blob/master/translator-infinispan-h... > > > ----- Original Message ----- >> Hi all, >> >> For a demo I'm giving next week, I'd like to show how to use distributed >> streams via a remote server task. All server tasks that we have in >> testsuite >> rely on primitives but in my case I wanted to use POJOs. >> >> To do that, I needed to get compatibility mode working in such way that >> those >> POJOs could be unmarshalled for the server task. Since in another demo I'm >> showing Protostream based POJOs, I thought I'd try to use that as >> mechanism >> to unmarshall POJOs server side. >> >> We have a test for such scenario [1], but the reality (running on a proper >> server) is anything that simple. Here's a list of things I've found out >> while creating a WordCount example that relies on a POJO: >> >> 1. Out of the box, it's impossible to set compatibility marshaller to >> org.infinispan.query.remote.CompatibilityProtoStreamMarshaller [1] because >> "org.infinispan.main" classloader can't access that class. I worked around >> that by tweaking the module.xml to have an optional dependency to >> "org.infinispan.remote-query.server" module. >> >> 2. After doing that, I had to register the protofile and associated >> classes >> remotely in the server. Again, there's no out of the box mechanism for >> that, >> so I created a remote server task that would do that [3]. >> >> 3. Finally, with all that in place, I was able to complete the WordCount >> test >> [4] with a final caveat: the return of the word count, and words protofile >> registration, tasks return objects that are not marshalled by the >> compatibility marshaller, so I had to make sure that the remote cache >> manager used for those tasks uses the default marshaller. >> >> Clearly we need to improve on this, and we have plans to address these >> issues >> (with new upcoming transcoding capabilities), but I thought it'd be worth >> mentioning the problems found in case anyone else encounters them before >> transcoding is in place. >> >> Cheers, >> >> [1] >> https://github.com/galderz/datagrid-patterns/blob/master/server-config/do... >> [2] >> https://github.com/galderz/datagrid-patterns/blob/master/server-config/or... >> [3] >> https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... >> [4] >> https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... >> -- >> Galder Zamarreño >> Infinispan, Red Hat >> >> >> _______________________________________________ >> infinispan-dev mailing list >> infinispan-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/infinispan-dev > > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev

On 30 Mar 2017, at 17:15, Gustavo Fernandes <gustavo(a)infinispan.org&gt; wrote: On Thu, Mar 30, 2017 at 1:51 PM, Galder Zamarreño <galder(a)redhat.com&gt; wrote: Hi all, For a demo I'm giving next week, I'd like to show how to use distributed streams via a remote server task. All server tasks that we have in testsuite rely on primitives but in my case I wanted to use POJOs. To do that, I needed to get compatibility mode working in such way that those POJOs could be unmarshalled for the server task. Since in another demo I'm showing Protostream based POJOs, I thought I'd try to use that as mechanism to unmarshall POJOs server side. We have a test for such scenario [1], but the reality (running on a proper server) is anything that simple. Here's a list of things I've found out while creating a WordCount example that relies on a POJO: 1. Out of the box, it's impossible to set compatibility marshaller to org.infinispan.query.remote.CompatibilityProtoStreamMarshaller [1] because "org.infinispan.main" classloader can't access that class. I worked around that by tweaking the module.xml to have an optional dependency to "org.infinispan.remote-query.server" module. 2. After doing that, I had to register the protofile and associated classes remotely in the server. Again, there's no out of the box mechanism for that, so I created a remote server task that would do that [3]. AFAICT, you should be able to do that doing a PUT in the Protobuf_Metadata cache, which entails having auth enabled. This cache should be REPL_SYNC, so no need to run a server task.

3. Finally, with all that in place, I was able to complete the WordCount test [4] with a final caveat: the return of the word count, and words protofile registration, tasks return objects that are not marshalled by the compatibility marshaller, so I had to make sure that the remote cache manager used for those tasks uses the default marshaller. Clearly we need to improve on this, and we have plans to address these issues (with new upcoming transcoding capabilities), but I thought it'd be worth mentioning the problems found in case anyone else encounters them before transcoding is in place. Cheers, [1] https://github.com/galderz/datagrid-patterns/blob/master/server-config/do... [2] https://github.com/galderz/datagrid-patterns/blob/master/server-config/or... [3] https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... [4] https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... -- Galder Zamarreño Infinispan, Red Hat _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev

On Thu, Mar 30, 2017 at 4:49 PM, Galder Zamarreño <galder(a)redhat.com&gt; wrote: > > -- > Galder Zamarreño > Infinispan, Red Hat > > > On 30 Mar 2017, at 17:15, Gustavo Fernandes <gustavo(a)infinispan.org&gt; > wrote: > > > > > > > > On Thu, Mar 30, 2017 at 1:51 PM, Galder Zamarreño <galder(a)redhat.com&gt; > wrote: > > Hi all, > > > > For a demo I'm giving next week, I'd like to show how to use > distributed streams via a remote server task. All server tasks that we have > in testsuite rely on primitives but in my case I wanted to use POJOs. > > > > To do that, I needed to get compatibility mode working in such way that > those POJOs could be unmarshalled for the server task. Since in another > demo I'm showing Protostream based POJOs, I thought I'd try to use that as > mechanism to unmarshall POJOs server side. > > > > We have a test for such scenario [1], but the reality (running on a > proper server) is anything that simple. Here's a list of things I've found > out while creating a WordCount example that relies on a POJO: > > > > 1. Out of the box, it's impossible to set compatibility marshaller to > org.infinispan.query.remote.CompatibilityProtoStreamMarshaller [1] > because "org.infinispan.main" classloader can't access that class. I worked > around that by tweaking the module.xml to have an optional dependency to > "org.infinispan.remote-query.server" module. > > > > 2. After doing that, I had to register the protofile and associated > classes remotely in the server. Again, there's no out of the box mechanism > for that, so I created a remote server task that would do that [3]. > > > > > > AFAICT, you should be able to do that doing a PUT in the > Protobuf_Metadata cache, which entails having auth enabled. This cache > should be REPL_SYNC, so no need to run a server task. > > Good point but not so sure it completely removes the need for the task. > The task does two things: > > 1. Call ProtobufMetadataManager.registerProtofile, which as you say > could be swapped with a cache.put on the metadata cache. > > 2. Call ProtobufMetadataManager.registerMarshaller. This goes deep into > updating SerializationContextImpl, which seems independent of any > replicated cache. > AFAICT (again), there is an internal listener or interceptor that upon metadata cache change, will update the SerCtx on all nodes. Gustavo

> > In fact, I had originally set up the task to execute in only in one node, > but when I did that I found that marshallers were not registered in all > nodes, so I had to execute the task in all nodes. > > I guess the task could be just limited to only executing 2.) in all nodes > (and store the protofile contents by accessing the cache remotely), but I > can't see how I can avoid the task altogether right now. > > > > > > > > > 3. Finally, with all that in place, I was able to complete the > WordCount test [4] with a final caveat: the return of the word count, and > words protofile registration, tasks return objects that are not marshalled > by the compatibility marshaller, so I had to make sure that the remote > cache manager used for those tasks uses the default marshaller. > > > > Clearly we need to improve on this, and we have plans to address these > issues (with new upcoming transcoding capabilities), but I thought it'd be > worth mentioning the problems found in case anyone else encounters them > before transcoding is in place. > > > > Cheers, > > > > [1] https://github.com/galderz/datagrid-patterns/blob/master/ser > ver-config/domain/domain.xml#L139 > > [2] https://github.com/galderz/datagrid-patterns/blob/master/ser > ver-config/org.infinispan.main_module.xml#L18 > > [3] https://github.com/galderz/datagrid-patterns/blob/master/ana > lytics-stream/tasks-server/src/main/java/test/WordsProtoTask.java > > [4] https://github.com/galderz/datagrid-patterns/blob/master/ana > lytics-stream/tasks-client/src/test/java/test/WordCountTest.java > > -- > > Galder Zamarreño > > Infinispan, Red Hat > > > > > > _______________________________________________ > > infinispan-dev mailing list > > infinispan-dev(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/infinispan-dev > > > > _______________________________________________ > > infinispan-dev mailing list > > infinispan-dev(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/infinispan-dev > > > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev >

On 30 Mar 2017, at 18:33, Dan Berindei <dan.berindei(a)gmail.com&gt; wrote: On Thu, Mar 30, 2017 at 3:51 PM, Galder Zamarreño <galder(a)redhat.com&gt; wrote: > Hi all, > > For a demo I'm giving next week, I'd like to show how to use distributed streams via a remote server task. All server tasks that we have in testsuite rely on primitives but in my case I wanted to use POJOs. > > To do that, I needed to get compatibility mode working in such way that those POJOs could be unmarshalled for the server task. Since in another demo I'm showing Protostream based POJOs, I thought I'd try to use that as mechanism to unmarshall POJOs server side. > > We have a test for such scenario [1], but the reality (running on a proper server) is anything that simple. Here's a list of things I've found out while creating a WordCount example that relies on a POJO: > > 1. Out of the box, it's impossible to set compatibility marshaller to org.infinispan.query.remote.CompatibilityProtoStreamMarshaller [1] because "org.infinispan.main" classloader can't access that class. I worked around that by tweaking the module.xml to have an optional dependency to "org.infinispan.remote-query.server" module. > I know Sanne also wanted to add one of the query modules as an optional dependency to the core module for a similar reason, but it seems really hacky.

Could the server create the GlobalConfigurationBuilder with a classloader that has access to the query module instead?

Alternatively, I know ModularClassResolver prefixes class names with the slot and module name, and can load a class from any module. Maybe we could also allow a slot:module:class format everywhere the configuration currently accepts a class name?

> 2. After doing that, I had to register the protofile and associated classes remotely in the server. Again, there's no out of the box mechanism for that, so I created a remote server task that would do that [3]. > > 3. Finally, with all that in place, I was able to complete the WordCount test [4] with a final caveat: the return of the word count, and words protofile registration, tasks return objects that are not marshalled by the compatibility marshaller, so I had to make sure that the remote cache manager used for those tasks uses the default marshaller. > > Clearly we need to improve on this, and we have plans to address these issues (with new upcoming transcoding capabilities), but I thought it'd be worth mentioning the problems found in case anyone else encounters them before transcoding is in place. > > Cheers, > > [1] https://github.com/galderz/datagrid-patterns/blob/master/server-config/do... > [2] https://github.com/galderz/datagrid-patterns/blob/master/server-config/or... > [3] https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... > [4] https://github.com/galderz/datagrid-patterns/blob/master/analytics-stream... > -- > Galder Zamarreño > Infinispan, Red Hat > > > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev