Examples of org.jgroups.protocols.pbcast.GMS$Resumer

org.jgroups.protocols.pbcast.GMS
Resumer is a second line of defense: when the ViewHandler is suspended, it will be resumed when the current merge is cancelled, or when the merge completes. However, in a case where this never happens (this shouldn't be the case !), the Resumer will nevertheless resume the ViewHandler. We chose this strategy because ViewHandler is critical: if it is suspended indefinitely, we would not be able to process new JOIN requests ! So, this is for peace of mind, although it most likely will never be used...


            ViewId new_vid=new ViewId(ch.getAddress(),vid.getId() + 1);
            View new_view=new View(new_vid,members);


            // inject view in which the shut down member is the only element
            GMS gms=(GMS)stack.findProtocol(GMS.class);
            gms.installView(new_view);
        }
        Util.close(ch);
    }

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                                 new VERIFY_SUSPECT(),
                                 new BARRIER(),
                                 new NAKACK2(),
                                 new UNICAST3(),
                                 new STABLE(),
                                 new GMS(),
                                 new UFC(),
                                 new MFC(),
                                 new FRAG2());


        ch.setReceiver(new ReceiverAdapter() {

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        transport.setEnableBundling(enabled);
        transport.setMaxBundleSize(max_bytes);
        transport.setMaxBundleTimeout(timeout);
        transport.setEnable_unicast_bundling(false);
        if(enabled) {
            GMS gms=(GMS)stack.findProtocol("GMS");
            gms.setViewAckCollectionTimeout(LATENCY * 2);
            gms.setJoinTimeout(LATENCY * 2);
        }
    }

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    }


    private static void changeProperties(JChannel ch) {
        ch.setOpt(Channel.AUTO_RECONNECT, true);
        ProtocolStack stack=ch.getProtocolStack();
        GMS gms=(GMS)stack.findProtocol("GMS");
        if(gms != null) {
            gms.setViewBundling(true);
            gms.setMaxBundlingTime(300);
            gms.setPrintLocalAddr(false);
        }
        MERGE2 merge=(MERGE2)stack.findProtocol("MERGE2");
        if(merge != null) {
            merge.setMinInterval(2000);
            merge.setMaxInterval(5000);

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    public void _testDelayedJoinResponse(long discovery_timeout, long join_timeout,
                                         long delay_join_req, long tolerance) throws Exception {
        c1.connect("x");


        ProtocolStack stack=c2.getProtocolStack();
        GMS gms=(GMS)stack.findProtocol("GMS");
        if(gms != null) {
            gms.setJoinTimeout(join_timeout);
        }


        Discovery discovery=(Discovery)stack.findProtocol(Discovery.class);        
        if(discovery != null) {
            discovery.setNumInitialMembers(10);

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    }




    private static void changeViewBundling(JChannel channel) {
        ProtocolStack stack=channel.getProtocolStack();
        GMS gms=(GMS)stack.findProtocol(GMS.class);
        if(gms != null) {
            gms.setViewBundling(true);
            gms.setMaxBundlingTime(500);
        }
    }

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                .addProtocol(new VERIFY_SUSPECT())
                .addProtocol(new BARRIER())
                .addProtocol(new NAKACK())
                .addProtocol(new UNICAST2())
                .addProtocol(new STABLE())
                .addProtocol(new GMS())
                .addProtocol(new UFC())
                .addProtocol(new MFC())
                .addProtocol(new FRAG2());
        stack.init();

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            Message merge_request=new Message();
            GMS.GmsHeader hdr=new GMS.GmsHeader(GMS.GmsHeader.MERGE_REQ);
            MergeId new_merge_id=MergeId.create(c1.getAddress());
            hdr.setMergeId(new_merge_id);
            merge_request.putHeader(GMS_ID, hdr);
            GMS gms=(GMS)c1.getProtocolStack().findProtocol(GMS.class);
            gms.setMergeTimeout(2000);
            MergeId merge_id=gms.getMergeId();
            assert merge_id == null;
            System.out.println("starting merge");
            gms.up(new Event(Event.MSG, merge_request));
            merge_id=gms.getMergeId();
            System.out.println("merge_id = " + merge_id);
            assert new_merge_id.equals(merge_id);


            long timeout=gms.getMergeTimeout() * 2;
            System.out.println("sleeping for " + timeout + " ms, then fetching merge_id: should be null (cancelled by the MergeCanceller)");
            long target_time=System.currentTimeMillis() + timeout;
            while(System.currentTimeMillis() < target_time) {
                merge_id=gms.getMergeId();
                if(merge_id == null)
                    break;
                Util.sleep(500);
            }


            merge_id=gms.getMergeId();
            System.out.println("merge_id = " + merge_id);
            assert merge_id == null : "MergeCanceller didn't kick in";
        }
        finally {
            Util.close(c1);

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     * @param members
     */
    private static void applyView(JChannel[] channels, String member, String ... members) throws Exception {
        JChannel ch=findChannel(member, channels);
        View view=createView(members, channels);
        GMS gms=(GMS)ch.getProtocolStack().findProtocol(GMS.class);
        gms.installView(view);
    }

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            Address coord=findAddress(tmp, channels);
            views.put(coord, findView(tmp, channels));
        }


        JChannel coord=findChannel(leader_addr, channels);
        GMS gms=(GMS)coord.getProtocolStack().findProtocol(GMS.class);
        gms.setLevel("trace");
        gms.up(new Event(Event.MERGE, views));
    }

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