I think we are completely missing each other. Forget sockets - that was just an example. I have code running in a Tomcat App server which is not managed by Tomcat and is not initiated by anything within Tomcat. That code now wants to call a servlet hosted in that very same JVM. Any way to do that without going out and back in on TCP?
On Mon, May 6, 2019 at 5:14 PM John Dale <jcdw...@gmail.com> wrote: > Sockets are an implementation of TCP/UDP inherently. > > Perhaps a mountaintop signal fire? > > ;) > > John > > > On 5/6/19, Paul Carter-Brown <paul.carter-br...@jini.guru> wrote: > > 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 > >> > >> > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
