lol on the Semaphore Telegraph, I can't use a request dispatcher as the request is being initiated from code that has no context. I already have it working with HTTP using asynchttp library, but I want to avoid the overhead. E.g. lets say I wrote my own server socket listener on port 10000 running in the Tomcat JVM and got some request in some propriatary protocol called X. Now I want to call a Tomcat servlet in the current JVM with some info I got over X without going out on TCP and back in....
On Mon, May 6, 2019 at 4:40 PM John Dale <jcdw...@gmail.com> wrote: > If you're wanting to forward control to another servlet deployed in > the same context: > https://www.javatpoint.com/requestdispatcher-in-servlet > > If you are okay going through TCP to facilitate some future or current > distribution of services, Use HTTPURLConnection (not sure what you're > wanting to do with the result of the request, if anything): > > https://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests > > If you need more sophisticated HTTP interactions, Apache maintains a > very useful library for that: http://hc.apache.org/ > > If these don't work-out for you, rather than using .NET, PHP, Python, > or some other Java facsimile at best, I recommend using the semaphore > telegraph: > https://en.wikipedia.org/wiki/Semaphore_telegraph > > Sincerely, > > John > DB2DOM > > On 5/6/19, Paul Carter-Brown <paul.carter-br...@jini.guru> wrote: > > Hi John, > > > > Thanks for your feedback. > > > > The request I'm initiating should not or need not carry any context from > > the originating code. There is also no session to worry about as its just > > for rest calls. So basically I have the headers, path and body and need > to > > generate a http servlet request and get an http servlet response (or > > similar) back. I have this working by calling into localhost but ideally > > want to skip the trombone out and back in. > > > > Have you got any basic code examples? > > > > Paul > > > > On Tue, Apr 30, 2019 at 5:27 PM John Dale <jcdw...@gmail.com> wrote: > > > >> Another thought .. you can do some request dispatching, but without > >> knowing more about the tools you're using, I can't say for sure if > >> this is the direction you'll want to go. > >> > >> On 4/29/19, Paul Carter-Brown <paul.carter-br...@jini.guru> wrote: > >> > Hi > >> > > >> > I'm trying to design a Kafka consumer and producer that will run > inside > >> the > >> > tomcat jvm and pick up messages off a Kafka topic and translate them > >> into a > >> > servlet request and pass it through tomcat and then when the response > >> > is > >> > complete then translate it into a Kafka message and put it onto > another > >> > topic as a reply. This way I can reuse our existing jax-rs rest > >> > services > >> > and expose them as an async api over Kafka. The idea is to make the > >> > Kafka > >> > messages similar to http in that they would consist of headers and a > >> body. > >> > The body would be json. > >> > > >> > Now I know this could be done by calling localhost with an http call > to > >> > trombone the requests back into tomcat but I'd like to avoid the > >> associated > >> > latency and overhead. Is it possible to call tomcat directly > >> > in-process. > >> > This does not need to be portable to other containers so can be > >> > proprietary. > >> > > >> > I'm using tomcat 8. In fact its tomee 8 but guessed this is more a > >> > tomcat > >> > question than tomee but have sent to both groups just in case. > >> > > >> > Thanks for any insights. > >> > > >> > Paul > >> > > >> > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
