| /* |
| * 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.brooklyn.core.entity; |
| |
| import org.apache.brooklyn.api.entity.Entity; |
| import org.apache.brooklyn.api.mgmt.Task; |
| import org.apache.brooklyn.api.sensor.AttributeSensor; |
| import org.apache.brooklyn.core.sensor.DependentConfiguration; |
| import org.apache.brooklyn.util.collections.CollectionFunctionals; |
| import org.apache.brooklyn.util.time.Duration; |
| |
| import com.google.common.base.Functions; |
| import com.google.common.base.Predicate; |
| import com.google.common.base.Predicates; |
| |
| /** Generally useful tasks related to entities */ |
| public class EntityTasks { |
| |
| /** creates an (unsubmitted) task which waits for the attribute to satisfy the given predicate, |
| * returning false if it times out or becomes unmanaged */ |
| public static <T> Task<Boolean> testingAttributeEventually(Entity entity, AttributeSensor<T> sensor, Predicate<T> condition, Duration timeout) { |
| return DependentConfiguration.builder().attributeWhenReady(entity, sensor) |
| .readiness(condition) |
| .postProcess(Functions.constant(true)) |
| .timeout(timeout) |
| .onTimeoutReturn(false) |
| .onUnmanagedReturn(false) |
| .build(); |
| } |
| |
| /** creates an (unsubmitted) task which waits for the attribute to satisfy the given predicate, |
| * throwing if it times out or becomes unmanaged */ |
| public static <T> Task<Boolean> requiringAttributeEventually(Entity entity, AttributeSensor<T> sensor, Predicate<T> condition, Duration timeout) { |
| return DependentConfiguration.builder().attributeWhenReady(entity, sensor) |
| .readiness(condition) |
| .postProcess(Functions.constant(true)) |
| .timeout(timeout) |
| .onTimeoutThrow() |
| .onUnmanagedThrow() |
| .build(); |
| } |
| |
| /** as {@link #testingAttributeEventually(Entity, AttributeSensor, Predicate, Duration) for multiple entities */ |
| public static <T> Task<Boolean> testingAttributeEventually(Iterable<Entity> entities, AttributeSensor<T> sensor, Predicate<T> condition, Duration timeout) { |
| return DependentConfiguration.builder().attributeWhenReadyFromMultiple(entities, sensor, condition) |
| .postProcess(Functions.constant(true)) |
| .timeout(timeout) |
| .onTimeoutReturn(false) |
| .onUnmanagedReturn(false) |
| .postProcessFromMultiple(CollectionFunctionals.all(Predicates.equalTo(true))) |
| .build(); |
| } |
| |
| /** as {@link #requiringAttributeEventually(Entity, AttributeSensor, Predicate, Duration) for multiple entities */ |
| public static <T> Task<Boolean> requiringAttributeEventually(Iterable<Entity> entities, AttributeSensor<T> sensor, Predicate<T> condition, Duration timeout) { |
| return DependentConfiguration.builder().attributeWhenReadyFromMultiple(entities, sensor, condition) |
| .postProcess(Functions.constant(true)) |
| .timeout(timeout) |
| .onTimeoutThrow() |
| .onUnmanagedThrow() |
| .postProcessFromMultiple(CollectionFunctionals.all(Predicates.equalTo(true))) |
| .build(); |
| } |
| |
| } |