nizhikov commented on code in PR #11040: URL: https://github.com/apache/ignite/pull/11040#discussion_r1393971141
########## modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/file/ZipFileIO.java: ########## @@ -0,0 +1,158 @@ +/* + * 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.ignite.internal.processors.cache.persistence.file; + +import java.io.BufferedOutputStream; +import java.io.File; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.MappedByteBuffer; +import java.nio.channels.Channels; +import java.nio.channels.WritableByteChannel; +import java.nio.file.Files; +import java.nio.file.Paths; +import java.util.zip.ZipEntry; +import java.util.zip.ZipOutputStream; +import org.apache.ignite.internal.util.typedef.internal.A; + +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.ZIP_SUFFIX; + +/** + * {@link FileIO} that allows to write ZIP compressed file. + * It doesn't support reading or random access. + * It is not designed for multithreaded writing. + */ +public class ZipFileIO extends AbstractFileIO { + /** Buffer size */ + private static final int BUFFER_SIZE = 128 * 1024; + + /** */ + private final ZipOutputStream zos; + + /** */ + private final WritableByteChannel ch; + + /** */ + private long pos; + + /** */ + public ZipFileIO(File file) throws IOException { + A.ensure(file.getName().endsWith(ZIP_SUFFIX), "File name should end with " + ZIP_SUFFIX); + + String entryName = file.getName().substring(0, file.getName().length() - ZIP_SUFFIX.length()); + + zos = new ZipOutputStream(new BufferedOutputStream(Files.newOutputStream(Paths.get(file.getPath())), BUFFER_SIZE)); + + zos.setLevel(9); + + zos.putNextEntry(new ZipEntry(entryName)); + + ch = Channels.newChannel(zos); + } + + /** {@inheritDoc} */ + @Override public long position() throws IOException { + return pos; Review Comment: Why do we need to support `position` method? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
