/*
* Copyright 2012-2017 the original author or authors.
*
* Licensed 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.springframework.boot.actuate.metrics.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.junit.Test;
import org.springframework.boot.actuate.metrics.util.SimpleInMemoryRepository.Callback;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link SimpleInMemoryRepository}.
*
* @author Dave Syer
*/
public class SimpleInMemoryRepositoryTests {
private final SimpleInMemoryRepository<String> repository = new SimpleInMemoryRepository<>();
@Test
public void setAndGet() {
this.repository.set("foo", "bar");
assertThat(this.repository.findOne("foo")).isEqualTo("bar");
}
@Test
public void updateExisting() {
this.repository.set("foo", "spam");
this.repository.update("foo", new Callback<String>() {
@Override
public String modify(String current) {
return "bar";
}
});
assertThat(this.repository.findOne("foo")).isEqualTo("bar");
}
@Test
public void updateNonexistent() {
this.repository.update("foo", new Callback<String>() {
@Override
public String modify(String current) {
return "bar";
}
});
assertThat(this.repository.findOne("foo")).isEqualTo("bar");
}
@Test
public void findWithPrefix() {
this.repository.set("foo", "bar");
this.repository.set("foo.bar", "one");
this.repository.set("foo.min", "two");
this.repository.set("foo.max", "three");
assertThat(((Collection<?>) this.repository.findAllWithPrefix("foo"))).hasSize(3);
}
@Test
public void patternsAcceptedForRegisteredPrefix() {
this.repository.set("foo.bar", "spam");
Iterator<String> iterator = this.repository.findAllWithPrefix("foo.*").iterator();
assertThat(iterator.next()).isEqualTo("spam");
assertThat(iterator.hasNext()).isFalse();
}
@Test
public void updateConcurrent() throws Exception {
SimpleInMemoryRepository<Integer> repository = new SimpleInMemoryRepository<>();
Collection<Callable<Boolean>> tasks = new ArrayList<>();
for (int i = 0; i < 1000; i++) {
tasks.add(new RepositoryUpdate(repository, 1));
tasks.add(new RepositoryUpdate(repository, -1));
}
List<Future<Boolean>> all = Executors.newFixedThreadPool(10).invokeAll(tasks);
for (Future<Boolean> future : all) {
assertThat(future.get(1, TimeUnit.SECONDS)).isTrue();
}
assertThat(repository.findOne("foo")).isEqualTo(0);
}
private static class RepositoryUpdate implements Callable<Boolean> {
private final SimpleInMemoryRepository<Integer> repository;
private final int delta;
RepositoryUpdate(SimpleInMemoryRepository<Integer> repository, int delta) {
this.repository = repository;
this.delta = delta;
}
@Override
public Boolean call() throws Exception {
this.repository.update("foo", new Callback<Integer>() {
@Override
public Integer modify(Integer current) {
if (current == null) {
return RepositoryUpdate.this.delta;
}
return current + RepositoryUpdate.this.delta;
}
});
return true;
}
}
}