| /* |
| * 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 brooklyn.entity.group; |
| |
| import org.testng.Assert; |
| import org.testng.annotations.BeforeMethod; |
| import org.testng.annotations.Test; |
| |
| import brooklyn.entity.BrooklynAppUnitTestSupport; |
| import brooklyn.entity.Entity; |
| import brooklyn.entity.Group; |
| import brooklyn.entity.basic.BasicGroup; |
| import brooklyn.entity.basic.Entities; |
| import brooklyn.entity.basic.EntityInternal; |
| import brooklyn.entity.basic.EntityLocal; |
| import brooklyn.entity.proxying.EntitySpec; |
| import brooklyn.entity.trait.Startable; |
| import brooklyn.event.SensorEvent; |
| import brooklyn.event.SensorEventListener; |
| import brooklyn.policy.PolicySpec; |
| import brooklyn.policy.basic.AbstractPolicy; |
| import brooklyn.test.Asserts; |
| import brooklyn.test.EntityTestUtils; |
| import brooklyn.test.entity.TestEntity; |
| import brooklyn.util.javalang.Boxing; |
| |
| import com.google.common.base.Objects; |
| import com.google.common.collect.ImmutableList; |
| |
| /** |
| * tests that a group's membership gets updated using subscriptions |
| */ |
| public class GroupPickUpEntitiesTest extends BrooklynAppUnitTestSupport { |
| |
| private BasicGroup group; |
| |
| @BeforeMethod(alwaysRun = true) |
| @Override |
| public void setUp() throws Exception { |
| super.setUp(); |
| group = app.createAndManageChild(EntitySpec.create(BasicGroup.class)); |
| |
| group.addPolicy(PolicySpec.create(FindUpServicesWithNameBob.class)); |
| } |
| |
| @Test |
| public void testGroupFindsElement() { |
| Assert.assertEquals(group.getMembers().size(), 0); |
| EntityTestUtils.assertAttributeEquals(group, BasicGroup.GROUP_SIZE, 0); |
| |
| final TestEntity e1 = app.createAndManageChild(EntitySpec.create(TestEntity.class)); |
| |
| EntityTestUtils.assertAttributeEquals(group, BasicGroup.GROUP_SIZE, 0); |
| |
| e1.setAttribute(Startable.SERVICE_UP, true); |
| e1.setAttribute(TestEntity.NAME, "bob"); |
| |
| EntityTestUtils.assertAttributeEqualsEventually(group, BasicGroup.GROUP_SIZE, 1); |
| Asserts.assertEqualsIgnoringOrder(group.getAttribute(BasicGroup.GROUP_MEMBERS), ImmutableList.of(e1)); |
| |
| final TestEntity e2 = app.createAndManageChild(EntitySpec.create(TestEntity.class)); |
| |
| EntityTestUtils.assertAttributeEquals(group, BasicGroup.GROUP_SIZE, 1); |
| Assert.assertEquals(group.getMembers().size(), 1); |
| Assert.assertTrue(group.getMembers().contains(e1)); |
| |
| e2.setAttribute(Startable.SERVICE_UP, true); |
| e2.setAttribute(TestEntity.NAME, "fred"); |
| |
| EntityTestUtils.assertAttributeEquals(group, BasicGroup.GROUP_SIZE, 1); |
| |
| e2.setAttribute(TestEntity.NAME, "BOB"); |
| EntityTestUtils.assertAttributeEqualsEventually(group, BasicGroup.GROUP_SIZE, 2); |
| Asserts.succeedsEventually(new Runnable() { |
| public void run() { |
| // must use "succeedsEventually" because size + members attributes are set sequentially in another thread; |
| // just waiting for the first does not mean the second will have been set by the time we check in this thread. |
| Asserts.assertEqualsIgnoringOrder(group.getAttribute(BasicGroup.GROUP_MEMBERS), ImmutableList.of(e1, e2)); |
| }}); |
| } |
| |
| |
| /** |
| * sets the membership of a group to be all up services; |
| * callers can subclass and override {@link #checkMembership(Entity)} to add additional membership constraints, |
| * and optionally {@link #init()} to apply additional subscriptions |
| */ |
| public static class FindUpServices extends AbstractPolicy { |
| |
| protected final SensorEventListener<Object> handler = new SensorEventListener<Object>() { |
| @Override |
| public void onEvent(SensorEvent<Object> event) { |
| updateMembership(event.getSource()); |
| } |
| }; |
| |
| @Override |
| public void setEntity(EntityLocal entity) { |
| assert entity instanceof Group; |
| super.setEntity(entity); |
| subscribe(null, Startable.SERVICE_UP, handler); |
| for (Entity e : ((EntityInternal) entity).getManagementContext().getEntityManager().getEntities()) { |
| if (Objects.equal(e.getApplicationId(), entity.getApplicationId())) |
| updateMembership(e); |
| } |
| } |
| |
| protected Group getGroup() { |
| return (Group) entity; |
| } |
| |
| protected void updateMembership(Entity e) { |
| boolean isMember = checkMembership(e); |
| if (isMember) getGroup().addMember(e); |
| else getGroup().removeMember(e); |
| } |
| |
| protected boolean checkMembership(Entity e) { |
| if (!Entities.isManaged(e)) return false; |
| if (!Boxing.unboxSafely(e.getAttribute(Startable.SERVICE_UP), false)) return false; |
| return true; |
| } |
| } |
| |
| |
| public static class FindUpServicesWithNameBob extends FindUpServices { |
| |
| @Override |
| public void setEntity(EntityLocal entity) { |
| super.setEntity(entity); |
| subscribe(null, TestEntity.NAME, handler); |
| } |
| |
| @Override |
| protected boolean checkMembership(Entity e) { |
| if (!super.checkMembership(e)) return false; |
| if (!"Bob".equalsIgnoreCase(e.getAttribute(TestEntity.NAME))) return false; |
| return true; |
| } |
| } |
| |
| } |