yurinaryshkin commented on code in PR #10798: URL: https://github.com/apache/ignite/pull/10798#discussion_r1258401396
########## modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/wal/ByteBufferWalIterator.java: ########## @@ -0,0 +1,169 @@ +/* + * 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.wal; + +import java.io.EOFException; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.Optional; +import org.apache.ignite.IgniteCheckedException; +import org.apache.ignite.IgniteLogger; +import org.apache.ignite.internal.pagemem.wal.record.WALRecord; +import org.apache.ignite.internal.processors.cache.GridCacheSharedContext; +import org.apache.ignite.internal.processors.cache.persistence.wal.record.HeaderRecord; +import org.apache.ignite.internal.processors.cache.persistence.wal.serializer.RecordSerializer; +import org.apache.ignite.internal.processors.cache.persistence.wal.serializer.RecordSerializerFactory; +import org.apache.ignite.internal.processors.cache.persistence.wal.serializer.RecordSerializerFactoryImpl; +import org.apache.ignite.internal.util.typedef.internal.U; +import org.apache.ignite.lang.IgniteBiPredicate; +import org.apache.ignite.lang.IgniteBiTuple; +import org.jetbrains.annotations.NotNull; + +import static org.apache.ignite.internal.pagemem.wal.record.WALRecord.RecordType.HEADER_RECORD; +import static org.apache.ignite.internal.processors.cache.persistence.wal.serializer.RecordV1Serializer.HEADER_RECORD_SIZE; + +/** Byte Buffer WAL Iterator */ +public class ByteBufferWalIterator extends AbstractWalRecordsIteratorAdapter { + /** */ + private static final long serialVersionUID = 0L; + + /** */ + private final ByteBuffer buf; + + /** */ + private final RecordSerializer serializer; + + /** */ + private final ByteBufferBackedDataInputImpl dataInput; + + /** */ + private boolean hdrChecked; + + /** */ + public ByteBufferWalIterator( + @NotNull IgniteLogger log, + @NotNull GridCacheSharedContext<?, ?> cctx, + @NotNull ByteBuffer byteBuf, + int ver) throws IgniteCheckedException { + this(log, cctx, byteBuf, ver, null); + } + + /** */ + public ByteBufferWalIterator( + @NotNull IgniteLogger log, + @NotNull GridCacheSharedContext<?, ?> cctx, + @NotNull ByteBuffer byteBuf, + int ver, + IgniteBiPredicate<WALRecord.RecordType, WALPointer> readTypeFilter) + throws IgniteCheckedException { + super(log); + + buf = byteBuf; + + RecordSerializerFactory rsf = new RecordSerializerFactoryImpl(cctx, readTypeFilter); + + serializer = rsf.createSerializer(ver); + + dataInput = new ByteBufferBackedDataInputImpl(); + + dataInput.buffer(buf); + + advance(); + } + + /** */ + private IgniteBiTuple<WALPointer, WALRecord> advanceRecord() throws IgniteCheckedException { + if (!buf.hasRemaining()) + return null; + + IgniteBiTuple<WALPointer, WALRecord> result; + + try { + if (!hdrChecked) { + IgniteBiTuple<WALPointer, WALRecord> hdr = tryToReadHeader(); + + if (hdr != null) + return hdr; Review Comment: Replaced reading header by skipping. User will never get header record. -- 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: notifications-unsubscr...@ignite.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
