/*
* 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.policy.loadbalancing;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.locks.ReentrantLock;
import org.apache.brooklyn.api.entity.Entity;
import org.apache.brooklyn.api.location.Location;
import org.apache.brooklyn.api.sensor.AttributeSensor;
import org.apache.brooklyn.core.entity.Attributes;
import org.apache.brooklyn.entity.group.AbstractGroupImpl;
import org.apache.brooklyn.util.collections.MutableList;
import org.apache.brooklyn.util.time.Time;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Predicates;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
public class MockContainerEntityImpl extends AbstractGroupImpl implements MockContainerEntity {
private static final Logger LOG = LoggerFactory.getLogger(MockContainerEntity.class);
volatile boolean offloading;
volatile boolean running;
ReentrantLock _lock = new ReentrantLock();
@Override
@Deprecated
public <T> T setAttribute(AttributeSensor<T> attribute, T val) {
if (LOG.isDebugEnabled()) LOG.debug("Mocks: container {} setting {} to {}", new Object[] {this, attribute, val});
return super.sensors().set(attribute, val);
}
@Override
public void lock() {
_lock.lock();
if (!running) {
_lock.unlock();
throw new IllegalStateException("Container lock "+this+"; it is not running");
}
}
@Override
public void unlock() {
_lock.unlock();
}
@Override
public int getWorkrate() {
int result = 0;
for (Entity member : getMembers()) {
Integer memberMetric = member.getAttribute(MockItemEntity.TEST_METRIC);
result += ((memberMetric != null) ? memberMetric : 0);
}
return result;
}
@Override
public Map<Entity, Double> getItemUsage() {
Map<Entity, Double> result = Maps.newLinkedHashMap();
for (Entity member : getMembers()) {
Map<Entity, Double> memberItemUsage = member.getAttribute(MockItemEntity.ITEM_USAGE_METRIC);
if (memberItemUsage != null) {
for (Map.Entry<Entity, Double> entry : memberItemUsage.entrySet()) {
double val = (result.containsKey(entry.getKey()) ? result.get(entry.getKey()) : 0d);
val += ((entry.getValue() != null) ? entry.getValue() : 0);
result.put(entry.getKey(), val);
}
}
}
return result;
}
@Override
public void addItem(Entity item) {
if (LOG.isDebugEnabled()) LOG.debug("Mocks: adding item {} to container {}", item, this);
if (!running || offloading) throw new IllegalStateException("Container "+getDisplayName()+" is not running; cannot add item "+item);
addMember(item);
sensors().emit(ITEM_ADDED, item);
}
@Override
public void removeItem(Entity item) {
if (LOG.isDebugEnabled()) LOG.debug("Mocks: removing item {} from container {}", item, this);
if (!running) throw new IllegalStateException("Container "+getDisplayName()+" is not running; cannot remove item "+item);
removeMember(item);
sensors().emit(ITEM_REMOVED, item);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public Set<Movable> getBalanceableItems() {
return (Set) Sets.newLinkedHashSet(getMembers());
}
public String toString() {
return "MockContainer["+getDisplayName()+"]";
}
private long getDelay() {
return getConfig(DELAY);
}
@Override
public void start(Collection<? extends Location> locs) {
if (LOG.isDebugEnabled()) LOG.debug("Mocks: starting container {}", this);
_lock.lock();
try {
Time.sleep(getDelay());
running = true;
addLocations(locs);
sensors().emit(Attributes.LOCATION_CHANGED, null);
sensors().set(SERVICE_UP, true);
} finally {
_lock.unlock();
}
}
@Override
public void stop() {
if (LOG.isDebugEnabled()) LOG.debug("Mocks: stopping container {}", this);
_lock.lock();
try {
running = false;
Time.sleep(getDelay());
sensors().set(SERVICE_UP, false);
} finally {
_lock.unlock();
}
}
private void stopWithoutLock() {
running = false;
Time.sleep(getDelay());
sensors().set(SERVICE_UP, false);
}
public void offloadAndStop(final MockContainerEntity otherContainer) {
if (LOG.isDebugEnabled()) LOG.debug("Mocks: offloading container {} to {} (items {})", new Object[] {this, otherContainer, getBalanceableItems()});
runWithLock(ImmutableList.of(this, otherContainer), new Runnable() {
public void run() {
offloading = false;
for (Movable item : getBalanceableItems()) {
((MockItemEntity)item).moveNonEffector(otherContainer);
}
if (LOG.isDebugEnabled()) LOG.debug("Mocks: stopping offloaded container {}", this);
stopWithoutLock();
}});
}
@Override
public void restart() {
if (LOG.isDebugEnabled()) LOG.debug("Mocks: restarting {}", this);
throw new UnsupportedOperationException();
}
public static void runWithLock(List<MockContainerEntity> entitiesToLock, Runnable r) {
List<MockContainerEntity> entitiesToLockCopy = MutableList.copyOf(Iterables.filter(entitiesToLock, Predicates.notNull()));
List<MockContainerEntity> entitiesLocked = Lists.newArrayList();
Collections.sort(entitiesToLockCopy, new Comparator<MockContainerEntity>() {
public int compare(MockContainerEntity o1, MockContainerEntity o2) {
return o1.getId().compareTo(o2.getId());
}});
try {
for (MockContainerEntity it : entitiesToLockCopy) {
it.lock();
entitiesLocked.add(it);
}
r.run();
} finally {
for (MockContainerEntity it : entitiesLocked) {
it.unlock();
}
}
}
}