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.jclouds.gogrid.location; import static com.google.common.base.Preconditions.checkNotNull; import static org.jclouds.compute.config.ComputeServiceProperties.TEMPLATE; import java.util.Map; import java.util.Set; import javax.inject.Inject; import javax.inject.Named; import javax.inject.Singleton; import org.jclouds.collect.Memoized; import org.jclouds.domain.Location; import org.jclouds.location.suppliers.ImplicitLocationSupplier; import com.google.common.base.Predicate; import com.google.common.base.Splitter; import com.google.common.base.Supplier; import com.google.common.collect.Iterables; /** * * @author Adrian Cole */ @Singleton public class GoGridDefaultLocationSupplier implements ImplicitLocationSupplier { private final Supplier<Set<? extends Location>> locations; private final String defaultDC; @Inject GoGridDefaultLocationSupplier(@Memoized Supplier<Set<? extends Location>> locations, @Named(TEMPLATE) String template) { this.locations = locations; Map<String, String> map = Splitter.on(',').trimResults().withKeyValueSeparator("=").split(template); //TODO: move to real ImplicitLocationSupplier this.defaultDC = checkNotNull(map.get("locationId"), "locationId not in % value: %s", TEMPLATE, template); } @Override public Location get() { return Iterables.find(locations.get(), new Predicate<Location>() { @Override public boolean apply(Location input) { return input.getId().equals(defaultDC); } }); } }