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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 org.elasticsearch.cluster.routing.allocation.decider.AllocationDecider;
import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
import org.elasticsearch.common.inject.*;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.test.ESTestCase;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
public class ExtensionPointTests extends ESTestCase {
public void testClassSet() {
final ExtensionPoint.ClassSet<AllocationDecider> allocationDeciders = new ExtensionPoint.ClassSet<>("allocation_decider", AllocationDecider.class, AllocationDeciders.class);
allocationDeciders.registerExtension(TestAllocationDecider.class);
Injector injector = new ModulesBuilder().add(new Module() {
@Override
public void configure(Binder binder) {
binder.bind(Settings.class).toInstance(Settings.EMPTY);
binder.bind(Consumer.class).asEagerSingleton();
allocationDeciders.bind(binder);
}
}).createInjector();
assertEquals(1, TestAllocationDecider.instances.get());
}
public static class Consumer {
@Inject
public Consumer(Set<AllocationDecider> deciders, TestAllocationDecider other) {
// we require the TestAllocationDecider more than once to ensure it's bound as a singleton
}
}
public static class TestAllocationDecider extends AllocationDecider {
static final AtomicInteger instances = new AtomicInteger(0);
@Inject
public TestAllocationDecider(Settings settings) {
super(settings);
instances.incrementAndGet();
}
}
}
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