/**
* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. jclouds 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.rest.functions;
import static com.google.common.base.Throwables.propagate;
import static org.jclouds.reflect.Reflection2.method;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
import org.jclouds.reflect.Invocation;
import org.jclouds.reflect.InvocationSuccess;
import org.jclouds.rest.annotations.Delegate;
import org.jclouds.rest.annotations.SinceApiVersion;
import org.jclouds.rest.functions.PresentWhenApiVersionLexicographicallyAtOrAfterSinceApiVersion.Loader;
import org.testng.annotations.Test;
import com.google.common.base.Optional;
import com.google.common.base.Stopwatch;
import com.google.common.collect.ImmutableList;
/**
* Allows you to use simple api version comparison to determine if a feature is
* available.
*
* @author Adrian Cole
*/
@Test(groups = "unit")
public class PresentWhenApiVersionLexicographicallyAtOrAfterSinceApiVersionTest {
// feature present in base api
static interface KeyPairAsyncApi {
}
@SinceApiVersion("2010-08-31")
static interface TagAsyncApi {
}
@SinceApiVersion("2011-01-01")
static interface VpcAsyncApi {
}
static interface EC2AsyncApi {
@Delegate
Optional<TagAsyncApi> getTagApiForRegion(String region);
@Delegate
Optional<KeyPairAsyncApi> getKeyPairApiForRegion(String region);
@Delegate
Optional<VpcAsyncApi> getVpcApiForRegion(String region);
}
public void testPresentWhenSinceApiVersionUnset() {
ImplicitOptionalConverter fn = forApiVersion("2011-07-15");
assertEquals(fn.apply(getKeyPairApi()), Optional.of("present"));
assertEquals(fn.apply(getFloatingIPApi()), Optional.of("present"));
assertEquals(fn.apply(getVpcApi()), Optional.of("present"));
}
public void testPresentWhenSinceApiVersionUnsetOrEqualToApiVersion() {
ImplicitOptionalConverter fn = forApiVersion("2011-01-01");
assertEquals(fn.apply(getKeyPairApi()), Optional.of("present"));
assertEquals(fn.apply(getFloatingIPApi()), Optional.of("present"));
assertEquals(fn.apply(getVpcApi()), Optional.of("present"));
}
public void testNotPresentWhenSinceApiVersionSetAndGreaterThanApiVersion() throws SecurityException,
NoSuchMethodException {
ImplicitOptionalConverter fn = forApiVersion("2006-06-26");
assertEquals(fn.apply(getKeyPairApi()), Optional.of("present"));
assertEquals(fn.apply(getFloatingIPApi()), Optional.absent());
assertEquals(fn.apply(getVpcApi()), Optional.absent());
}
private ImplicitOptionalConverter forApiVersion(String apiVersion) {
return new PresentWhenApiVersionLexicographicallyAtOrAfterSinceApiVersion(apiVersion);
}
public void testLoaderPresentWhenSinceApiVersionUnset() {
Loader fn = new Loader("2011-07-15");
assertEquals(fn.load(getKeyPairApi()), Optional.of("present"));
assertEquals(fn.load(getFloatingIPApi()), Optional.of("present"));
assertEquals(fn.load(getVpcApi()), Optional.of("present"));
}
public void testLoaderPresentWhenSinceApiVersionUnsetOrEqualToApiVersion() {
Loader fn = new Loader("2011-01-01");
assertEquals(fn.load(getKeyPairApi()), Optional.of("present"));
assertEquals(fn.load(getFloatingIPApi()), Optional.of("present"));
assertEquals(fn.load(getVpcApi()), Optional.of("present"));
}
public void testLoaderNotPresentWhenSinceApiVersionSetAndGreaterThanApiVersion() throws SecurityException,
NoSuchMethodException {
Loader fn = new Loader("2006-06-26");
assertEquals(fn.load(getKeyPairApi()), Optional.of("present"));
assertEquals(fn.load(getFloatingIPApi()), Optional.absent());
assertEquals(fn.load(getVpcApi()), Optional.absent());
}
public void testCacheIsFasterWhenNoAnnotationPresent() {
InvocationSuccess keyPairApi = getKeyPairApi();
ImplicitOptionalConverter fn = forApiVersion("2011-07-15");
Stopwatch watch = new Stopwatch().start();
fn.apply(keyPairApi);
long first = watch.stop().elapsed(TimeUnit.MICROSECONDS);
watch.reset().start();
fn.apply(keyPairApi);
long cached = watch.stop().elapsed(TimeUnit.MICROSECONDS);
assertTrue(cached < first, String.format("cached [%s] should be less than initial [%s]", cached, first));
Logger.getAnonymousLogger().info(
"lookup cache saved " + (first - cached) + " microseconds when no annotation present");
}
public void testCacheIsFasterWhenAnnotationPresent() {
InvocationSuccess floatingIpApi = getKeyPairApi();
ImplicitOptionalConverter fn = forApiVersion("2011-07-15");
Stopwatch watch = new Stopwatch().start();
fn.apply(floatingIpApi);
long first = watch.stop().elapsed(TimeUnit.MICROSECONDS);
watch.reset().start();
fn.apply(floatingIpApi);
long cached = watch.stop().elapsed(TimeUnit.MICROSECONDS);
assertTrue(cached < first, String.format("cached [%s] should be less than initial [%s]", cached, first));
Logger.getAnonymousLogger().info(
"lookup cache saved " + (first - cached) + " microseconds when annotation present");
}
InvocationSuccess getFloatingIPApi() {
return getApi("Tag", TagAsyncApi.class);
}
InvocationSuccess getKeyPairApi() {
return getApi("KeyPair", KeyPairAsyncApi.class);
}
InvocationSuccess getVpcApi() {
return getApi("Vpc", VpcAsyncApi.class);
}
InvocationSuccess getApi(String name, Class<?> target) {
try {
return InvocationSuccess.create(
Invocation.create(method(EC2AsyncApi.class, "get" + name + "ApiForRegion", String.class),
ImmutableList.<Object> of("region")), "present");
} catch (Exception e) {
throw propagate(e);
}
}
}