Re: Re: how is topic implemented?
I just want to learn some internal design about ActiveMQ. I have just visited activemq site and surprisingly find the logo of activeMQ changes. Ha , the new logo is more colorful. 1095193...@qq.com From: Tim Bain [via ActiveMQ] Date: 2017-08-09 12:37 To: wangqinghuan Subject: Re: Re: how is topic implemented? It doesn't use temporary queues. Rather, each consumer results in a TopicSubscription <https://github.com/apache/activemq/blob/master/activemq-broker/src/main/java/org/apache/activemq/broker/region/TopicSubscription.java> being created, and each message sent to the topic has a reference handed to the TopicSubscription for processing. This uses memory, but is lighter-weight than using a full-fledged destination such as a temporary queue. Why do you ask? Tim On Tue, Aug 8, 2017 at 8:02 PM, wangqinghuan <[hidden email]> wrote: > hi Justin > > I'm using ActiveMQ 5.9 broker. > > > > [hidden email] > > From: Justin Bertram [via ActiveMQ] > Date: 2017-08-08 21:02 > To: wangqinghuan > Subject: Re: how is topic implemented? > Are you talking about the ActiveMQ 5.x broker or ActiveMQ Artemis broker? > > > Justin > > On Tue, Aug 8, 2017 at 3:06 AM, wangqinghuan <[hidden email]> wrote: > > > Hi > > I have some puzzle about implementation of topic. > > When many subsribers subscribe a topic, they each one can receive a copy > of > > message. How does activeMq implement topic? Does it maintain a temporary > > queue for every subscriber? If lots of subsribers, lots of queues are > > maintained in ActiveMQ broker? > > > > > > > > -- > > View this message in context: http://activemq.2283324.n4. > > nabble.com/how-is-topic-implemented-tp4729456.html > > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > > > > > > > If you reply to this email, your message will be added to the discussion > below: > http://activemq.2283324.n4.nabble.com/how-is-topic- > implemented-tp4729456p4729460.html > To unsubscribe from how is topic implemented?, click here. > NAML > > > > > -- > View this message in context: http://activemq.2283324.n4. > nabble.com/how-is-topic-implemented-tp4729456p4729511.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > If you reply to this email, your message will be added to the discussion below: http://activemq.2283324.n4.nabble.com/how-is-topic-implemented-tp4729456p4729514.html To unsubscribe from how is topic implemented?, click here. NAML -- View this message in context: http://activemq.2283324.n4.nabble.com/how-is-topic-implemented-tp4729456p4729525.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
Re: Re: how is topic implemented?
It doesn't use temporary queues. Rather, each consumer results in a TopicSubscription <https://github.com/apache/activemq/blob/master/activemq-broker/src/main/java/org/apache/activemq/broker/region/TopicSubscription.java> being created, and each message sent to the topic has a reference handed to the TopicSubscription for processing. This uses memory, but is lighter-weight than using a full-fledged destination such as a temporary queue. Why do you ask? Tim On Tue, Aug 8, 2017 at 8:02 PM, wangqinghuan <1095193...@qq.com> wrote: > hi Justin > > I'm using ActiveMQ 5.9 broker. > > > > 1095193...@qq.com > > From: Justin Bertram [via ActiveMQ] > Date: 2017-08-08 21:02 > To: wangqinghuan > Subject: Re: how is topic implemented? > Are you talking about the ActiveMQ 5.x broker or ActiveMQ Artemis broker? > > > Justin > > On Tue, Aug 8, 2017 at 3:06 AM, wangqinghuan <[hidden email]> wrote: > > > Hi > > I have some puzzle about implementation of topic. > > When many subsribers subscribe a topic, they each one can receive a copy > of > > message. How does activeMq implement topic? Does it maintain a temporary > > queue for every subscriber? If lots of subsribers, lots of queues are > > maintained in ActiveMQ broker? > > > > > > > > -- > > View this message in context: http://activemq.2283324.n4. > > nabble.com/how-is-topic-implemented-tp4729456.html > > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > > > > > > > If you reply to this email, your message will be added to the discussion > below: > http://activemq.2283324.n4.nabble.com/how-is-topic- > implemented-tp4729456p4729460.html > To unsubscribe from how is topic implemented?, click here. > NAML > > > > > -- > View this message in context: http://activemq.2283324.n4. > nabble.com/how-is-topic-implemented-tp4729456p4729511.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. >
Re: Re: how is topic implemented?
hi Justin I'm using ActiveMQ 5.9 broker. 1095193...@qq.com From: Justin Bertram [via ActiveMQ] Date: 2017-08-08 21:02 To: wangqinghuan Subject: Re: how is topic implemented? Are you talking about the ActiveMQ 5.x broker or ActiveMQ Artemis broker? Justin On Tue, Aug 8, 2017 at 3:06 AM, wangqinghuan <[hidden email]> wrote: > Hi > I have some puzzle about implementation of topic. > When many subsribers subscribe a topic, they each one can receive a copy of > message. How does activeMq implement topic? Does it maintain a temporary > queue for every subscriber? If lots of subsribers, lots of queues are > maintained in ActiveMQ broker? > > > > -- > View this message in context: http://activemq.2283324.n4. > nabble.com/how-is-topic-implemented-tp4729456.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. > If you reply to this email, your message will be added to the discussion below: http://activemq.2283324.n4.nabble.com/how-is-topic-implemented-tp4729456p4729460.html To unsubscribe from how is topic implemented?, click here. NAML -- View this message in context: http://activemq.2283324.n4.nabble.com/how-is-topic-implemented-tp4729456p4729511.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
Re: how is topic implemented?
Are you talking about the ActiveMQ 5.x broker or ActiveMQ Artemis broker? Justin On Tue, Aug 8, 2017 at 3:06 AM, wangqinghuan <1095193...@qq.com> wrote: > Hi > I have some puzzle about implementation of topic. > When many subsribers subscribe a topic, they each one can receive a copy of > message. How does activeMq implement topic? Does it maintain a temporary > queue for every subscriber? If lots of subsribers, lots of queues are > maintained in ActiveMQ broker? > > > > -- > View this message in context: http://activemq.2283324.n4. > nabble.com/how-is-topic-implemented-tp4729456.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com. >
how is topic implemented?
Hi I have some puzzle about implementation of topic. When many subsribers subscribe a topic, they each one can receive a copy of message. How does activeMq implement topic? Does it maintain a temporary queue for every subscriber? If lots of subsribers, lots of queues are maintained in ActiveMQ broker? -- View this message in context: http://activemq.2283324.n4.nabble.com/how-is-topic-implemented-tp4729456.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
