mirror of https://github.com/apache/jclouds.git
functions for regions
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/**
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* Licensed to jclouds, Inc. (jclouds) under one or more
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* contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. jclouds licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.jclouds.location.functions;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.google.common.base.Preconditions.checkNotNull;
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import static com.google.common.base.Preconditions.checkState;
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import java.net.URI;
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import java.util.Map;
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import javax.inject.Inject;
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import javax.inject.Singleton;
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import org.jclouds.javax.annotation.Nullable;
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import org.jclouds.location.Region;
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import com.google.common.base.Function;
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import com.google.common.base.Supplier;
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/**
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*
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* @author Adrian Cole
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*/
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@Singleton
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public class RegionToEndpoint implements Function<Object, URI> {
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private final Supplier<Map<String, Supplier<URI>>> regionToEndpointSupplier;
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@Inject
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public RegionToEndpoint(@Region Supplier<Map<String, Supplier<URI>>> regionToEndpointSupplier) {
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this.regionToEndpointSupplier = checkNotNull(regionToEndpointSupplier, "regionToEndpointSupplier");
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}
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@Override
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public URI apply(@Nullable Object from) {
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checkArgument(from != null && from instanceof String, "you must specify a region, as a String argument");
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Map<String, Supplier<URI>> regionToEndpoint = regionToEndpointSupplier.get();
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checkState(regionToEndpoint.size() > 0, "no region name to endpoint mappings configured!");
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checkArgument(regionToEndpoint.containsKey(from),
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"requested location %s, which is not in the configured locations: %s", from, regionToEndpoint);
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return regionToEndpoint.get(from).get();
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}
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}
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@ -0,0 +1,68 @@
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/**
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* Licensed to jclouds, Inc. (jclouds) under one or more
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* contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. jclouds licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.jclouds.location.functions;
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import static org.testng.Assert.assertEquals;
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import java.io.File;
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import java.net.URI;
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import java.util.Map;
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import org.testng.annotations.Test;
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import com.google.common.base.Supplier;
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import com.google.common.base.Suppliers;
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import com.google.common.collect.ImmutableMap;
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/**
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* Tests behavior of {@code RegionToEndpoint}
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*
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* @author Adrian Cole
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*/
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@Test(groups = "unit", testName = "RegionToEndpointTest")
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public class RegionToEndpointTest {
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@Test
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public void testCorrect() {
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RegionToEndpoint fn = new RegionToEndpoint(Suppliers.<Map<String, Supplier<URI>>> ofInstance(ImmutableMap.of("1",
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Suppliers.ofInstance(URI.create("http://1")))));
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assertEquals(fn.apply("1"), URI.create("http://1"));
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}
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testMustBeString() {
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RegionToEndpoint fn = new RegionToEndpoint(Suppliers.<Map<String, Supplier<URI>>> ofInstance(ImmutableMap.of("1",
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Suppliers.ofInstance(URI.create("http://1")))));
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fn.apply(new File("foo"));
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}
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@Test(expectedExceptions = IllegalStateException.class)
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public void testMustHaveEndpoints() {
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RegionToEndpoint fn = new RegionToEndpoint(Suppliers.<Map<String, Supplier<URI>>> ofInstance(ImmutableMap
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.<String, Supplier<URI>> of()));
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fn.apply("1");
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}
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testNullIsIllegal() {
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RegionToEndpoint fn = new RegionToEndpoint(Suppliers.<Map<String, Supplier<URI>>> ofInstance(ImmutableMap.of("1",
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Suppliers.ofInstance(URI.create("http://1")))));
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fn.apply(null);
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}
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}
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