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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common.util;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
import org.elasticsearch.common.inject.Binder;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.Injector;
import org.elasticsearch.common.inject.Module;
import org.elasticsearch.common.inject.ModulesBuilder;
import org.elasticsearch.test.ESTestCase;
public class ExtensionPointTests extends ESTestCase {
public void testClassSet() {
final ExtensionPoint.ClassSet<TestBaseClass> allocationDeciders = new ExtensionPoint.ClassSet<>("test_class", TestBaseClass.class, Consumer.class);
allocationDeciders.registerExtension(TestImpl.class);
Injector injector = new ModulesBuilder().add(new Module() {
@Override
public void configure(Binder binder) {
allocationDeciders.bind(binder);
}
}).createInjector();
assertEquals(1, TestImpl.instances.get());
}
public static class TestBaseClass {}
public static class Consumer {
@Inject
public Consumer(Set<TestBaseClass> deciders, TestImpl other) {
// we require the TestImpl more than once to ensure it's bound as a singleton
}
}
public static class TestImpl extends TestBaseClass {
static final AtomicInteger instances = new AtomicInteger(0);
@Inject
public TestImpl() {
instances.incrementAndGet();
}
}
}
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