kafka ObjectSerializationCache 源码
kafka ObjectSerializationCache 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/protocol/ObjectSerializationCache.java
/*
* 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.kafka.common.protocol;
import java.util.IdentityHashMap;
/**
* The ObjectSerializationCache stores sizes and values computed during the
* first serialization pass. This avoids recalculating and recomputing the same
* values during the second pass.
*
* It is intended to be used as part of a two-pass serialization process like:
* ObjectSerializationCache cache = new ObjectSerializationCache();
* message.size(version, cache);
* message.write(version, cache);
*/
public final class ObjectSerializationCache {
private final IdentityHashMap<Object, Object> map;
public ObjectSerializationCache() {
this.map = new IdentityHashMap<>();
}
public void setArraySizeInBytes(Object o, Integer size) {
map.put(o, size);
}
public Integer getArraySizeInBytes(Object o) {
return (Integer) map.get(o);
}
public void cacheSerializedValue(Object o, byte[] val) {
map.put(o, val);
}
public byte[] getSerializedValue(Object o) {
Object value = map.get(o);
return (byte[]) value;
}
}
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