Examples with UniversalMembershipListenerAdapter org.apache.geode.management.membership.UniversalMembershipListenerAdapter used on opensource projects

Example 6 with UniversalMembershipListenerAdapter

use of org.apache.geode.management.membership.UniversalMembershipListenerAdapter in project geode by apache.

the class UniversalMembershipListenerAdapterDUnitTest method testNoDuplicates.

/**
   * Tests use of history to prevent duplicate events.
   */
@Test
public void testNoDuplicates() throws Exception {
    getSystem();
    final boolean[] fired = new boolean[3];
    final DistributedMember[] member = new DistributedMember[3];
    final String[] memberId = new String[3];
    UniversalMembershipListenerAdapter listener = new UniversalMembershipListenerAdapter() {

        @Override
        public synchronized void memberJoined(MembershipEvent event) {
            assertFalse(fired[JOINED]);
            assertNull(member[JOINED]);
            assertNull(memberId[JOINED]);
            fired[JOINED] = true;
            member[JOINED] = event.getDistributedMember();
            memberId[JOINED] = event.getMemberId();
            notify();
        }

        @Override
        public synchronized void memberLeft(MembershipEvent event) {
            assertFalse(fired[LEFT]);
            assertNull(member[LEFT]);
            assertNull(memberId[LEFT]);
            fired[LEFT] = true;
            member[LEFT] = event.getDistributedMember();
            memberId[LEFT] = event.getMemberId();
            notify();
        }

        @Override
        public synchronized void memberCrashed(MembershipEvent event) {
            // assures no dupes
            assertFalse(fired[CRASHED]);
            assertNull(member[CRASHED]);
            assertNull(memberId[CRASHED]);
            fired[CRASHED] = true;
            member[CRASHED] = event.getDistributedMember();
            memberId[CRASHED] = event.getMemberId();
            notify();
        }
    };
    DistributedMember memberA = new TestDistributedMember("memberA");
    ServerLocation serverA = new ServerLocation("serverA", 0);
    // first join
    InternalClientMembership.notifyClientJoined(memberA);
    synchronized (listener) {
        if (!fired[JOINED]) {
            listener.wait(SYNC_ASYNC_EVENT_WAIT_MILLIS);
        }
    }
    assertTrue(fired[JOINED]);
    assertEquals(memberA, member[JOINED]);
    assertEquals(memberA.getId(), memberId[JOINED]);
    fired[JOINED] = false;
    member[JOINED] = null;
    memberId[JOINED] = null;
    // duplicate join
    InternalClientMembership.notifyClientJoined(memberA);
    Wait.pause(BRIEF_PAUSE_MILLIS);
    assertFalse(fired[JOINED]);
    assertNull(member[JOINED]);
    assertNull(memberId[JOINED]);
    // first left
    InternalClientMembership.notifyClientLeft(memberA);
    synchronized (listener) {
        if (!fired[LEFT]) {
            listener.wait(SYNC_ASYNC_EVENT_WAIT_MILLIS);
        }
    }
    assertTrue(fired[LEFT]);
    assertEquals(memberA, member[LEFT]);
    assertEquals(memberA.getId(), memberId[LEFT]);
    fired[LEFT] = false;
    member[LEFT] = null;
    memberId[LEFT] = null;
    // duplicate left
    InternalClientMembership.notifyClientLeft(memberA);
    Wait.pause(BRIEF_PAUSE_MILLIS);
    assertFalse(fired[LEFT]);
    assertNull(member[LEFT]);
    assertNull(memberId[LEFT]);
    // rejoin
    InternalClientMembership.notifyClientJoined(memberA);
    synchronized (listener) {
        if (!fired[JOINED]) {
            listener.wait(SYNC_ASYNC_EVENT_WAIT_MILLIS);
        }
    }
    assertTrue(fired[JOINED]);
    assertEquals(memberA, member[JOINED]);
    assertEquals(memberA.getId(), memberId[JOINED]);
}