Java tutorial
/* * 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.location.dynamic.clocker; import static com.google.common.base.Preconditions.checkNotNull; import java.util.Collection; import java.util.Map; import java.util.Set; import org.apache.brooklyn.api.location.LocationDefinition; import org.apache.brooklyn.api.location.MachineLocation; import org.apache.brooklyn.api.location.MachineProvisioningLocation; import org.apache.brooklyn.api.location.NoMachinesAvailableException; import org.apache.brooklyn.api.mgmt.ManagementContext.PropertiesReloadListener; import org.apache.brooklyn.config.ConfigKey; import org.apache.brooklyn.core.config.ConfigKeys; import org.apache.brooklyn.core.location.AbstractLocation; import org.apache.brooklyn.core.location.BasicLocationDefinition; import org.apache.brooklyn.core.location.dynamic.DynamicLocation; import org.apache.brooklyn.util.core.flags.SetFromFlag; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.google.common.base.Predicates; import com.google.common.collect.HashMultimap; import com.google.common.collect.ImmutableMap; import com.google.common.collect.Iterables; import com.google.common.collect.Multimaps; import com.google.common.collect.SetMultimap; public class StubInfrastructureLocation extends AbstractLocation implements MachineProvisioningLocation<MachineLocation>, DynamicLocation<StubInfrastructure, StubInfrastructureLocation> { @SuppressWarnings("unused") private static final Logger LOG = LoggerFactory.getLogger(StubInfrastructureLocation.class); public static final ConfigKey<String> LOCATION_NAME = ConfigKeys.newStringConfigKey("locationName"); @SetFromFlag("locationRegistrationId") private String locationRegistrationId; @SetFromFlag("machines") private final SetMultimap<StubHostLocation, String> containers = Multimaps .synchronizedSetMultimap(HashMultimap.<StubHostLocation, String>create()); private transient StubInfrastructure infrastructure; @Override public void init() { super.init(); // TODO BasicLocationRebindsupport.addCustoms currently calls init() unfortunately! // Don't checkNotNull in that situation - it could be this location is orphaned! if (isRebinding()) { infrastructure = (StubInfrastructure) getConfig(OWNER); } else { infrastructure = (StubInfrastructure) checkNotNull(getConfig(OWNER), "owner"); addReloadListener(); } } @Override public void rebind() { super.rebind(); infrastructure = (StubInfrastructure) getConfig(OWNER); if (getConfig(LOCATION_NAME) != null) { register(); } addReloadListener(); } @SuppressWarnings("serial") private void addReloadListener() { getManagementContext().addPropertiesReloadListener(new PropertiesReloadListener() { @Override public void reloaded() { register(); } }); } @Override public LocationDefinition register() { String locationName = checkNotNull(getConfig(LOCATION_NAME), "config %s", LOCATION_NAME.getName()); LocationDefinition check = getManagementContext().getLocationRegistry() .getDefinedLocationByName(locationName); if (check != null) { throw new IllegalStateException("Location " + locationName + " is already defined: " + check); } String locationSpec = String.format(StubResolver.DOCKER_INFRASTRUCTURE_SPEC, getId()) + String.format(":(name=\"%s\")", locationName); LocationDefinition definition = new BasicLocationDefinition(locationName, locationSpec, ImmutableMap.<String, Object>of()); getManagementContext().getLocationRegistry().updateDefinedLocation(definition); locationRegistrationId = definition.getId(); requestPersist(); return definition; } @Override public void deregister() { if (locationRegistrationId != null) { getManagementContext().getLocationRegistry().removeDefinedLocation(locationRegistrationId); locationRegistrationId = null; requestPersist(); } } @Override public StubInfrastructure getOwner() { return (StubInfrastructure) getConfig(OWNER); } @Override public MachineLocation obtain(Map<?, ?> flags) throws NoMachinesAvailableException { StubHost host = (StubHost) Iterables.get(infrastructure.getStubHostList(), 0); StubHostLocation hostLocation = host.getDynamicLocation(); StubContainerLocation containerLocation = hostLocation.obtain(flags); containers.put(hostLocation, containerLocation.getId()); return containerLocation; } @Override public void release(MachineLocation machine) { Set<StubHostLocation> set = Multimaps.filterValues(containers, Predicates.equalTo(machine.getId())) .keySet(); StubHostLocation hostLocation = Iterables.getOnlyElement(set); hostLocation.release((StubContainerLocation) machine); containers.remove(hostLocation, machine); } @Override public MachineProvisioningLocation<MachineLocation> newSubLocation(Map<?, ?> newFlags) { return this; } @Override public Map<String, Object> getProvisioningFlags(Collection<String> tags) { return ImmutableMap.of(); } }