org.apache.flink.runtime.io.disk.iomanager.AbstractChannelWriterOutputView Maven / Gradle / Ivy
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* 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.flink.runtime.io.disk.iomanager;
import org.apache.flink.runtime.memory.AbstractPagedOutputView;
import java.io.IOException;
/**
* A {@link org.apache.flink.core.memory.DataOutputView} that is backed by a {@link FileIOChannel},
* making it effectively a data output stream. The view writes it data in blocks to the underlying
* channel.
*/
public abstract class AbstractChannelWriterOutputView extends AbstractPagedOutputView {
public AbstractChannelWriterOutputView(int segmentSize, int headerLength) {
super(segmentSize, headerLength);
}
/** Get the underlying channel. */
public abstract FileIOChannel getChannel();
/**
* Closes this OutputView, closing the underlying writer
*
* @return the number of bytes in last memory segment.
*/
public abstract int close() throws IOException;
/** Gets the number of blocks used by this view. */
public abstract int getBlockCount();
/** Get output bytes. */
public abstract long getNumBytes() throws IOException;
/** Get output compressed bytes, return num bytes if there is no compression. */
public abstract long getNumCompressedBytes() throws IOException;
}