/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.avro.reflect;
import org.apache.avro.Schema;
import org.junit.Test;
import java.io.IOException;
import java.lang.reflect.Field;
import java.util.Collections;
import java.util.Map;
import static org.hamcrest.Matchers.lessThan;
import static org.junit.Assert.assertThat;
public class TestReflectData {
@Test
@SuppressWarnings("unchecked")
public void testWeakSchemaCaching() throws Exception {
int numSchemas = 1000000;
for (int i = 0; i < numSchemas; i++) {
// Create schema
Schema schema = Schema.createRecord("schema", null, null, false);
schema.setFields(Collections.<Schema.Field>emptyList());
ReflectData.get().getRecordState(new Object(), schema);
}
// Reflect the number of schemas currently in the cache
ReflectData.ClassAccessorData classData = ReflectData.ACCESSOR_CACHE
.get(Object.class);
System.gc(); // Not guaranteed, but seems to be reliable enough
assertThat("ReflectData cache should release references",
classData.bySchema.size(), lessThan(numSchemas));
}
}