Examples of org.jgroups.View

org.jgroups.View
A view is a local representation of the current membership of a group. Only one view is installed in a channel at a time. Views contain the address of its creator, an ID and a list of member addresses. These adresses are ordered, and the first address is always the coordinator of the view. This way, each member of the group knows who the new coordinator will be if the current one crashes or leaves the group. The views are sent between members using the VIEW_CHANGE event @author Bela Ban @version $Id: View.java,v 1.20 2008/02/20 15:51:57 belaban Exp $

        finally {
            lock.unlock();
        }


        Util.sleep(500);
        View view=c1.getView();
        System.out.println("view=" + view);
        assert view.size() == 2 : "view=" + view;
        Util.close(c2, c1);
    }

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        g=Util.createRandomAddress("G");
        h=Util.createRandomAddress("H");
        i=Util.createRandomAddress("I");
        ViewId id=new ViewId(a, 34);
        members=Arrays.asList(a, b, d, e, f, g, h);
        view=new View(id, members);


    }

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    public void testEquals() {
        assert view.equals(view);
    }


    public void testEquals2() {
        View v1=new View(new ViewId(a, 12345), new Vector<Address>(members));
        View v2=new View(a, 12345, new Vector<Address>(members));
        assert v1.equals(v2);
        View v3=new View(a, 12543, new Vector<Address>(members));
        assert !v1.equals(v3);
    }

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        assert !v1.equals(v3);
    }
 


    public static void testEquals3() {
        View v1=new View(), v2=new View();
        assert v1.equals(v2);
    }

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        View v1=new View(), v2=new View();
        assert v1.equals(v2);
    }


    public void testCopy() {
        View view2=view.copy();
        System.out.println("view = " + view);
        System.out.println("view2 = " + view2);
        assert view.equals(view2);
    }

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    private static <T> Collection<T> makeList(T ... elements) {
        return new ArrayList<T>(Arrays.asList(elements));
    }


    private static View makeView(Address coord, Address ... members) {
        return new View(coord, 1, new Vector<Address>(Arrays.asList(members)));
    }

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        channel=new JChannel(props);
        setProps(channel);
        channel.connect("DisconnectTest.testgroup-1");
        channel.disconnect();
        channel.connect("DisconnectTest.testgroup-2");
        View view=channel.getView();
        assert view.size() == 1;
        assert view.containsMember(channel.getAddress());
    }

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        coordinator.connect(GROUP);
        channel.connect("DisconnectTest.testgroup-1");
        channel.disconnect();
        channel.connect(GROUP);
        View view=channel.getView();
        assert view.size() == 2;
        assert view.containsMember(channel.getAddress());
        assert view.containsMember(coordinator.getAddress());
    }

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        channel=new JChannel(props);
        setProps(channel);
        channel.connect("DisconnectTest.testgroup-1");
        channel.disconnect();
        channel.connect("DisconnectTest.testgroup-2");
        View view=channel.getView();
        assert view.size() == 1;
        assert view.containsMember(channel.getAddress());
    }

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         GMS coord_gms=(GMS)coordinator.getProtocolStack().findProtocol(GMS.class);
         if(coord_gms != null)
             coord_gms.setLevel("trace");


         View view;
         long end_time=System.currentTimeMillis() + 10000;
         while(System.currentTimeMillis() < end_time) {
             view=coordinator.getView();
             if(view.size() == 1)
                 break;
             Util.sleep(500);
         }
         view=coordinator.getView();
         assert view.size() == 1 : "coordinator's view is " + view + ", but we expected a view of 1 member";
         if(coord_gms != null)
             coord_gms.setLevel("warn");
     }

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