/*
* Copyright 2002-2014 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.core.type;
import java.net.URL;
import org.junit.Test;
import org.springframework.core.io.Resource;
import org.springframework.core.io.UrlResource;
import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.MetadataReaderFactory;
import org.springframework.tests.Assume;
import org.springframework.tests.TestGroup;
import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;
/**
* Unit tests for checking the behaviour of {@link CachingMetadataReaderFactory} under
* load. If the cache is not controlled, this test should fail with an out of memory
* exception around entry 5k.
*
* @author Costin Leau
* @author Sam Brannen
*/
public class CachingMetadataReaderLeakTests {
private static final int ITEMS_TO_LOAD = 9999;
private final MetadataReaderFactory mrf = new CachingMetadataReaderFactory();
@Test
public void testSignificantLoad() throws Exception {
Assume.group(TestGroup.LONG_RUNNING);
// the biggest public class in the JDK (>60k)
URL url = getClass().getResource("/java/awt/Component.class");
assertThat(url, notNullValue());
// look at a LOT of items
for (int i = 0; i < ITEMS_TO_LOAD; i++) {
Resource resource = new UrlResource(url) {
@Override
public boolean equals(Object obj) {
return (obj == this);
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
};
MetadataReader reader = mrf.getMetadataReader(resource);
assertThat(reader, notNullValue());
}
// useful for profiling to take snapshots
// System.in.read();
}
}