/** Tests a merge between ViewIds of the same coord, e.g. A|6, A|7, A|8, A|9 */
public void testViewsBySameCoord() {
View v1 =
View.create(
a.getAddress(),
6,
a.getAddress(),
b.getAddress(),
c.getAddress(),
d.getAddress()); // {A,B,C,D}
View v2 =
View.create(a.getAddress(), 7, a.getAddress(), b.getAddress(), c.getAddress()); // {A,B,C}
View v3 = View.create(a.getAddress(), 8, a.getAddress(), b.getAddress()); // {A,B}
View v4 = View.create(a.getAddress(), 9, a.getAddress()); // {A}
Util.close(b, c, d); // not interested in those...
MERGE3 merge = (MERGE3) a.getProtocolStack().findProtocol(MERGE3.class);
for (View view : Arrays.asList(v1, v2, v4, v3)) {
MERGE3.MergeHeader hdr = MERGE3.MergeHeader.createInfo(view.getViewId(), null, null);
Message msg = new Message(null, a.getAddress(), null).putHeader(merge.getId(), hdr);
merge.up(new Event(Event.MSG, msg));
}
merge.checkInconsistencies(); // no merge will happen
Util.waitUntilAllChannelsHaveSameSize(10000, 500, a);
System.out.println("A's view: " + a.getView());
assert a.getView().size() == 1;
assert a.getView().containsMember(a.getAddress());
}
/** A: {A,B} B: {A,B} C: {C} C receives INFO from B only */
public void testMergeWithIncompleteInfos() throws Exception {
Util.close(d);
enableInfoSender(false, a, b, c);
View one = View.create(a.getAddress(), 10, a.getAddress(), b.getAddress());
View two = View.create(c.getAddress(), 10, c.getAddress());
injectView(one, a, b);
injectView(two, c);
enableInfoSender(false, a, b, c);
Util.waitUntilAllChannelsHaveSameSize(10000, 500, a, b);
Util.waitUntilAllChannelsHaveSameSize(10000, 500, c);
System.out.printf("\nPartitions:\n");
for (JChannel ch : Arrays.asList(a, b, c))
System.out.println(ch.getName() + ": " + ch.getView());
MERGE3.MergeHeader hdr = MERGE3.MergeHeader.createInfo(one.getViewId(), null, null);
Message msg =
new Message(null, b.getAddress(), null)
.putHeader(merge_id, hdr); // B sends the INFO message to C
Event merge_event = new Event(Event.MSG, msg);
MERGE3 merge = (MERGE3) c.getProtocolStack().findProtocol(MERGE3.class);
merge.up(merge_event);
enableInfoSender(true, a, b, c);
System.out.println("\nEnabling INFO sending in merge protocols to merge subclusters");
Util.waitUntilAllChannelsHaveSameSize(30000, 1000, a, b, c);
System.out.println("\nResulting views:");
for (JChannel ch : Arrays.asList(a, b, c)) {
GMS gms = (GMS) ch.getProtocolStack().findProtocol(GMS.class);
View mv = gms.view();
System.out.println(mv);
}
for (JChannel ch : Arrays.asList(a, b, c)) {
GMS gms = (GMS) ch.getProtocolStack().findProtocol(GMS.class);
View mv = gms.view();
assert mv instanceof MergeView;
assert mv.size() == 3;
assert ((MergeView) mv).getSubgroups().size() == 2;
}
for (JChannel ch : Arrays.asList(a, b, c)) {
View view = ch.getView();
assert view.size() == 3 : "view should have 3 members: " + view;
}
}
/**
* Tests a simple split: {A,B} and {C,D} need to merge back into one subgroup. Checks how many
* MergeViews are installed
*/
public void testSplitInTheMiddle() {
View v1 = View.create(a.getAddress(), 10, a.getAddress(), b.getAddress());
View v2 = View.create(c.getAddress(), 10, c.getAddress(), d.getAddress());
injectView(v1, a, b);
injectView(v2, c, d);
Util.waitUntilAllChannelsHaveSameSize(10000, 500, a, b);
Util.waitUntilAllChannelsHaveSameSize(10000, 500, c, d);
for (JChannel ch : Arrays.asList(a, b, c, d))
System.out.println(ch.getName() + ": " + ch.getView());
Address merge_leader_one =
new Membership().add(a.getAddress(), b.getAddress()).sort().elementAt(0);
Address merge_leader_two =
new Membership().add(c.getAddress(), d.getAddress()).sort().elementAt(0);
for (int x = 0; x < 20; x++) {
if (a.getView().size() == 4
&& b.getView().size() == 4
&& c.getView().size() == 4
&& d.getView().size() == 4) break;
for (JChannel ch : Arrays.asList(a, b, c, d)) {
MERGE3 merge = (MERGE3) ch.getProtocolStack().findProtocol(MERGE3.class);
merge.sendInfo(); // multicasts an INFO msg to everybody else
}
for (JChannel ch :
Arrays.asList(findChannel(merge_leader_one), findChannel(merge_leader_two))) {
MERGE3 merge = (MERGE3) ch.getProtocolStack().findProtocol(MERGE3.class);
merge.checkInconsistencies();
}
Util.sleep(1000);
}
for (JChannel ch : Arrays.asList(a, b, c, d))
System.out.println(ch.getName() + ": " + ch.getView());
for (JChannel ch : Arrays.asList(a, b, c, d))
assert ch.getView().size() == 4 : "view of " + ch.getName() + ": " + ch.getView();
}
protected void checkInconsistencies(JChannel... channels) {
for (JChannel ch : channels) {
MERGE3 merge = (MERGE3) ch.getProtocolStack().findProtocol(MERGE3.class);
merge.checkInconsistencies();
}
}
protected void injectMergeEvents(List<Event> events, JChannel... channels) {
for (JChannel ch : channels) {
MERGE3 merge = (MERGE3) ch.getProtocolStack().findProtocol(MERGE3.class);
for (Event evt : events) merge.up(evt);
}
}
