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Add one-shot shecduled execution policy and abstract parent class
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policy/src/main/java/org/apache/brooklyn/policy/action/AbstractScheduledEffectorPolicy.java
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| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.brooklyn.policy.action; | ||
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| import java.util.Map; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.ScheduledExecutorService; | ||
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| import org.apache.brooklyn.api.effector.Effector; | ||
| import org.apache.brooklyn.config.ConfigKey; | ||
| import org.apache.brooklyn.core.config.ConfigKeys; | ||
| import org.apache.brooklyn.core.entity.EntityInitializers; | ||
| import org.apache.brooklyn.core.policy.AbstractPolicy; | ||
| import org.apache.brooklyn.util.collections.MutableMap; | ||
| import org.apache.brooklyn.util.guava.Maybe; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import com.google.common.annotations.Beta; | ||
| import com.google.common.base.Predicates; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.common.reflect.TypeToken; | ||
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| @Beta | ||
| public abstract class AbstractScheduledEffectorPolicy extends AbstractPolicy implements Runnable { | ||
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| private static final Logger LOG = LoggerFactory.getLogger(AbstractScheduledEffectorPolicy.class); | ||
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| public static final ConfigKey<String> EFFECTOR = ConfigKeys.builder(String.class) | ||
| .name("effector") | ||
| .description("The effector to be executed by this policy") | ||
| .constraint(Predicates.notNull()) | ||
| .build(); | ||
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| public static final ConfigKey<Map<String, Object>> EFFECTOR_ARGUMENTS = ConfigKeys.builder(new TypeToken<Map<String, Object>>() { }) | ||
| .name("args") | ||
| .description("The effector arguments and their values") | ||
| .constraint(Predicates.notNull()) | ||
| .defaultValue(ImmutableMap.<String, Object>of()) | ||
| .build(); | ||
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| private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor(); | ||
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| public AbstractScheduledEffectorPolicy() { | ||
| this(MutableMap.<String,Object>of()); | ||
| } | ||
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| public AbstractScheduledEffectorPolicy(Map<String,?> props) { | ||
| super(props); | ||
| } | ||
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| @Override | ||
| public void destroy(){ | ||
| super.destroy(); | ||
| executor.shutdownNow(); | ||
| } | ||
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| @Override | ||
| public void run() { | ||
| String effectorName = config().get(EFFECTOR); | ||
| Map<String, Object> args = EntityInitializers.resolve(config().getBag(), EFFECTOR_ARGUMENTS); | ||
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| Maybe<Effector<?>> effector = entity.getEntityType().getEffectorByName(effectorName); | ||
| if (effector.isAbsent()) { | ||
| throw new IllegalStateException("Cannot find effector " + effectorName); | ||
| } | ||
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| LOG.info("{} invoking effector on {}, effector={}, args={}", new Object[] { this, entity, effectorName, args }); | ||
| entity.invoke(effector.get(), args).getUnchecked(); | ||
| } | ||
| } |
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policy/src/main/java/org/apache/brooklyn/policy/action/PeriodicEffectorPolicy.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
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| package org.apache.brooklyn.policy.action; | ||
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| import java.util.Map; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.ScheduledExecutorService; | ||
| import java.util.concurrent.TimeUnit; | ||
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| import org.apache.brooklyn.api.entity.EntityLocal; | ||
| import org.apache.brooklyn.api.sensor.AttributeSensor; | ||
| import org.apache.brooklyn.api.sensor.SensorEvent; | ||
| import org.apache.brooklyn.api.sensor.SensorEventListener; | ||
| import org.apache.brooklyn.config.ConfigKey; | ||
| import org.apache.brooklyn.core.config.ConfigKeys; | ||
| import org.apache.brooklyn.core.sensor.Sensors; | ||
| import org.apache.brooklyn.util.collections.MutableMap; | ||
| import org.apache.brooklyn.util.time.Duration; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import com.google.common.annotations.Beta; | ||
| import com.google.common.base.Predicates; | ||
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| /** | ||
| * <pre>{@code | ||
| * brooklyn.policies: | ||
| * - type: org.apache.brooklyn.policy.action.ScheduledEffectorPolicy | ||
| * brooklyn.config: | ||
| * effector: repaveCluster | ||
| * args: | ||
| * k: $brooklyn:config("repave.size") | ||
| * period: 1 day | ||
| * }</pre> | ||
| */ | ||
| @Beta | ||
| public class PeriodicEffectorPolicy extends AbstractScheduledEffectorPolicy { | ||
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| private static final Logger LOG = LoggerFactory.getLogger(PeriodicEffectorPolicy.class); | ||
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| public static final ConfigKey<Duration> PERIOD = ConfigKeys.builder(Duration.class) | ||
| .name("period") | ||
| .description("The duration between executions of this policy") | ||
| .constraint(Predicates.notNull()) | ||
| .defaultValue(Duration.hours(1)) | ||
| .build(); | ||
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| public static final AttributeSensor<Void> INVOKE_IMMEDIATELY = Sensors.newSensor(Void.TYPE, "scheduler.invoke"); | ||
| public static final AttributeSensor<Boolean> START_SCHEDULER = Sensors.newBooleanSensor("scheduler.start"); | ||
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| protected long delay; | ||
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| private final ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor(); | ||
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| public PeriodicEffectorPolicy() { | ||
| this(MutableMap.<String,Object>of()); | ||
| } | ||
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| public PeriodicEffectorPolicy(Map<String,?> props) { | ||
| super(props); | ||
| Duration period = config().get(PERIOD); | ||
| delay = period.toMilliseconds(); | ||
| } | ||
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| @Override | ||
| public void setEntity(final EntityLocal entity) { | ||
| super.setEntity(entity); | ||
| subscriptions().subscribe(entity, INVOKE_IMMEDIATELY, handler); | ||
| subscriptions().subscribe(entity, START_SCHEDULER, handler); | ||
| } | ||
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| private final SensorEventListener<Object> handler = new SensorEventListener<Object>() { | ||
| @Override | ||
| public void onEvent(SensorEvent<Object> event) { | ||
| if (event.getSensor().equals(START_SCHEDULER)) { | ||
| if (Boolean.TRUE.equals(event.getValue())) { | ||
| executor.scheduleWithFixedDelay(PeriodicEffectorPolicy.this, delay, delay, TimeUnit.MILLISECONDS); | ||
| } else { | ||
| executor.shutdown(); | ||
| } | ||
| } else if (event.getSensor().equals(INVOKE_IMMEDIATELY)) { | ||
| executor.submit(PeriodicEffectorPolicy.this); | ||
| } | ||
| } | ||
| }; | ||
|
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| } |
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