kafka CloseableIterator 源码
kafka CloseableIterator 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/utils/CloseableIterator.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.utils;
import java.io.Closeable;
import java.util.Iterator;
/**
* Iterators that need to be closed in order to release resources should implement this interface.
*
* Warning: before implementing this interface, consider if there are better options. The chance of misuse is
* a bit high since people are used to iterating without closing.
*/
public interface CloseableIterator<T> extends Iterator<T>, Closeable {
void close();
static <R> CloseableIterator<R> wrap(Iterator<R> inner) {
return new CloseableIterator<R>() {
@Override
public void close() {}
@Override
public boolean hasNext() {
return inner.hasNext();
}
@Override
public R next() {
return inner.next();
}
@Override
public void remove() {
inner.remove();
}
};
}
}
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