The message will be used by only one thread. what about CMS implementation? our team has many c++ users. is c++ client the exactly the same logic as java?
On Thu, Mar 6, 2014 at 12:24 AM, artnaseef <[email protected]> wrote: > That sounds right to me. As long as each message object is not simultaneously > used in more than one thread, you should be safe. > > Sent from my iPhone > >> On Mar 5, 2014, at 3:10 AM, "Li Li [via ActiveMQ]" >> <[email protected]> wrote: >> >> hi all, >> I want to use INDIVIDUAL_ACKNOWLEDGE like this: >> I have one session and a receiver thread. this thread receive messages >> to ten worker thread. >> each worker thread acknowledge it's message >> >> receiver thread: >> while(true){ >> Message msg=receiver.receive(); >> put msg to a ConcurrentLinkedList; >> } >> >> Worker thread: >> while(true){ >> Message msg=getMessgeFromLinkedList(); >> process msg; >> msg.acknowledge(); >> } >> >> is it thread safe? >> >> I have debugged into ActiveMQMessageConsumer.acknowledge in 5.9.0 >> >> void acknowledge(MessageDispatch md, byte ackType) throws JMSException { >> MessageAck ack = new MessageAck(md, ackType, 1); >> session.sendAck(ack); >> synchronized(deliveredMessages){ >> deliveredMessages.remove(md); >> } >> } >> >> 1. it seems remove message from deliveredMessages is synchronized >> 2. session.sendAck(ack); >> sendAck(ack,false); >> asyncSendPacket(ack); >> connection.asyncSendPacket(command); >> connection is thread safe, so message.acknowledge is thread-safe? >> >> >> If you reply to this email, your message will be added to the discussion >> below: >> http://activemq.2283324.n4.nabble.com/is-msg-acknowledge-thread-safe-in-INDIVIDUAL-ACKNOWLEDGE-mode-tp4678545.html >> To start a new topic under ActiveMQ - Dev, email >> [email protected] >> To unsubscribe from ActiveMQ - Dev, click here. >> NAML > > > > > -- > View this message in context: > http://activemq.2283324.n4.nabble.com/is-msg-acknowledge-thread-safe-in-INDIVIDUAL-ACKNOWLEDGE-mode-tp4678545p4678553.html > Sent from the ActiveMQ - Dev mailing list archive at Nabble.com.
