| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.sling.event.impl.discovery; |
| |
| import java.util.Collections; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| import org.apache.sling.discovery.ClusterView; |
| import org.apache.sling.discovery.InstanceDescription; |
| import org.apache.sling.discovery.TopologyEvent; |
| import org.apache.sling.discovery.TopologyEvent.Type; |
| import org.apache.sling.discovery.TopologyEventListener; |
| import org.apache.sling.discovery.TopologyView; |
| import org.junit.Test; |
| import org.mockito.Mockito; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| |
| public class InitDelayingTopologyEventListenerTest { |
| |
| class TestListener implements TopologyEventListener { |
| |
| private List<TopologyEvent> events = new LinkedList<TopologyEvent>(); |
| |
| @Override |
| public void handleTopologyEvent(TopologyEvent event) { |
| synchronized (events) { |
| events.add(event); |
| events.notifyAll(); |
| } |
| } |
| |
| public List<TopologyEvent> getEvents() { |
| synchronized (events) { |
| return events; |
| } |
| } |
| |
| public void waitForEventCnt(int cnt, long timeout) throws InterruptedException { |
| final long start = System.currentTimeMillis(); |
| synchronized (events) { |
| while (events.size() != cnt) { |
| final long now = System.currentTimeMillis(); |
| final long remaining = (start + timeout) - now; |
| if (remaining > 0) { |
| events.wait(remaining); |
| } else { |
| fail("did not receive " + cnt + " events within " + timeout + " ms, " |
| + "but " + events.size()); |
| } |
| } |
| } |
| } |
| |
| public void assureEventCnt(int cnt, int timeout) throws InterruptedException { |
| final long start = System.currentTimeMillis(); |
| synchronized (events) { |
| while (events.size() == cnt) { |
| final long now = System.currentTimeMillis(); |
| final long remaining = (start + timeout) - now; |
| if (remaining > 0) { |
| events.wait(remaining); |
| } else { |
| // success |
| return; |
| } |
| } |
| fail("did not receive " + cnt + " events within " + timeout + " ms, " |
| + "but " + events.size()); |
| } |
| } |
| } |
| |
| @Test |
| public void testConstructor() throws Exception { |
| final TopologyEventListener delegate = new TopologyEventListener() { |
| |
| @Override |
| public void handleTopologyEvent(TopologyEvent event) { |
| // nothing here atm |
| } |
| }; |
| try { |
| new InitDelayingTopologyEventListener(-1, delegate); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(0, delegate); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(1, null); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(-1, delegate); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(0, delegate); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(1, null); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(-1, delegate); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(0, delegate); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| try { |
| new InitDelayingTopologyEventListener(1, null); |
| fail("should complain"); |
| } catch (IllegalArgumentException re) { |
| // ok |
| } |
| } |
| |
| private TopologyView createView(boolean current) { |
| final TopologyView view = Mockito.mock(TopologyView.class); |
| Mockito.when(view.isCurrent()).thenReturn(current); |
| final InstanceDescription local = Mockito.mock(InstanceDescription.class); |
| Mockito.when(local.isLeader()).thenReturn(true); |
| Mockito.when(local.isLocal()).thenReturn(true); |
| Mockito.when(local.getSlingId()).thenReturn("id"); |
| |
| Mockito.when(view.getLocalInstance()).thenReturn(local); |
| final ClusterView localView = Mockito.mock(ClusterView.class); |
| Mockito.when(localView.getId()).thenReturn("1"); |
| Mockito.when(localView.getInstances()).thenReturn(Collections.singletonList(local)); |
| Mockito.when(view.getClusterViews()).thenReturn(Collections.singleton(localView)); |
| Mockito.when(local.getClusterView()).thenReturn(localView); |
| |
| return view; |
| } |
| |
| private TopologyEvent createEvent(Type type) { |
| TopologyView oldView = createView(false); |
| TopologyView newView = createView(true); |
| switch (type) { |
| case TOPOLOGY_CHANGING: { |
| return new TopologyEvent(type, oldView, null); |
| } |
| case PROPERTIES_CHANGED: |
| case TOPOLOGY_CHANGED: { |
| return new TopologyEvent(type, oldView, newView); |
| } |
| case TOPOLOGY_INIT: { |
| return new TopologyEvent(type, null, newView); |
| } |
| default: { |
| throw new IllegalArgumentException("unknown type: " + type); |
| } |
| } |
| } |
| |
| @Test |
| public void testDisposing() throws Exception { |
| final TestListener delegate = new TestListener(); |
| InitDelayingTopologyEventListener listener = new InitDelayingTopologyEventListener(1, delegate); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_INIT)); |
| delegate.waitForEventCnt(1, 5000); |
| delegate.assureEventCnt(1, 500); // test framework testing :) |
| |
| listener = new InitDelayingTopologyEventListener(1, delegate); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_INIT)); |
| listener.dispose(); |
| delegate.assureEventCnt(1, 1000); |
| delegate.assureEventCnt(1, 500); |
| } |
| |
| @Test |
| public void testNoEvents() throws Exception { |
| final TestListener delegate = new TestListener(); |
| InitDelayingTopologyEventListener listener = new InitDelayingTopologyEventListener(1, delegate); |
| // no events: |
| delegate.assureEventCnt(0, 1500); |
| |
| // then the first init is passed through |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_INIT)); |
| delegate.waitForEventCnt(1, 5000); |
| assertEquals(delegate.getEvents().get(0).getType(), Type.TOPOLOGY_INIT); |
| |
| doTestAdditionalEventsAfterInit(delegate, listener); |
| } |
| |
| private void doTestAdditionalEventsAfterInit(final TestListener delegate, InitDelayingTopologyEventListener listener) |
| throws InterruptedException { |
| // 2nd one too |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| delegate.waitForEventCnt(2, 5000); |
| assertEquals(delegate.getEvents().get(1).getType(), Type.TOPOLOGY_CHANGING); |
| |
| // 3rd one too |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| delegate.waitForEventCnt(3, 5000); |
| assertEquals(delegate.getEvents().get(2).getType(), Type.TOPOLOGY_CHANGED); |
| |
| // 4th one too |
| listener.handleTopologyEvent(createEvent(Type.PROPERTIES_CHANGED)); |
| delegate.waitForEventCnt(4, 5000); |
| assertEquals(delegate.getEvents().get(3).getType(), Type.PROPERTIES_CHANGED); |
| |
| // 5th one too |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| delegate.waitForEventCnt(5, 5000); |
| assertEquals(delegate.getEvents().get(4).getType(), Type.TOPOLOGY_CHANGING); |
| |
| // 6th one too |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| delegate.waitForEventCnt(6, 5000); |
| assertEquals(delegate.getEvents().get(5).getType(), Type.TOPOLOGY_CHANGED); |
| |
| } |
| |
| @Test |
| public void testChanging0() throws Exception { |
| final TestListener delegate = new TestListener(); |
| InitDelayingTopologyEventListener listener = new InitDelayingTopologyEventListener(1, delegate); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_INIT)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| delegate.assureEventCnt(0, 1000); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| delegate.waitForEventCnt(1, 5000); |
| assertEquals(delegate.getEvents().get(0).getType(), Type.TOPOLOGY_INIT); |
| |
| doTestAdditionalEventsAfterInit(delegate, listener); |
| } |
| |
| @Test |
| public void testChanging1() throws Exception { |
| final TestListener delegate = new TestListener(); |
| InitDelayingTopologyEventListener listener = new InitDelayingTopologyEventListener(1, delegate); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_INIT)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| delegate.assureEventCnt(0, 1000); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| delegate.waitForEventCnt(1, 5000); |
| assertEquals(delegate.getEvents().get(0).getType(), Type.TOPOLOGY_INIT); |
| |
| doTestAdditionalEventsAfterInit(delegate, listener); |
| } |
| |
| @Test |
| public void testChanged() throws Exception { |
| final TestListener delegate = new TestListener(); |
| InitDelayingTopologyEventListener listener = new InitDelayingTopologyEventListener(1, delegate); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_INIT)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| delegate.waitForEventCnt(1, 5000); |
| assertEquals(delegate.getEvents().get(0).getType(), Type.TOPOLOGY_INIT); |
| |
| doTestAdditionalEventsAfterInit(delegate, listener); |
| } |
| |
| @Test |
| public void testProperties() throws Exception { |
| final TestListener delegate = new TestListener(); |
| InitDelayingTopologyEventListener listener = new InitDelayingTopologyEventListener(2, delegate); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_INIT)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGING)); |
| listener.handleTopologyEvent(createEvent(Type.TOPOLOGY_CHANGED)); |
| listener.handleTopologyEvent(createEvent(Type.PROPERTIES_CHANGED)); |
| delegate.waitForEventCnt(1, 5000); |
| assertEquals(delegate.getEvents().get(0).getType(), Type.TOPOLOGY_INIT); |
| |
| doTestAdditionalEventsAfterInit(delegate, listener); |
| } |
| |
| } |