nizhikov commented on a change in pull request #8909: URL: https://github.com/apache/ignite/pull/8909#discussion_r639604936
########## File path: modules/core/src/main/java/org/apache/ignite/internal/cdc/ChangeDataCaptureConsumerState.java ########## @@ -0,0 +1,113 @@ +/* + * 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.cdc; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.StandardOpenOption; +import java.util.Iterator; +import org.apache.ignite.IgniteException; +import org.apache.ignite.cdc.ChangeDataCaptureConsumer; +import org.apache.ignite.cdc.ChangeDataCaptureEvent; +import org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer; + +import static java.nio.file.StandardCopyOption.ATOMIC_MOVE; +import static java.nio.file.StandardCopyOption.REPLACE_EXISTING; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.FILE_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.TMP_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer.POINTER_SIZE; + +/** + * CDC Consumer state. + * + * Each time {@link ChangeDataCaptureConsumer#onEvents(Iterator)} returns {@code true} + * current offset in WAL segment saved to file. + * This allows to the {@link ChangeDataCaptureConsumer} to continue consumption of the {@link ChangeDataCaptureEvent} + * from the last saved offset in case of fail or restart. + * + * @see ChangeDataCaptureConsumer#onEvents(Iterator) + * @see ChangeDataCapture + */ +public class ChangeDataCaptureConsumerState { + /** State file. */ + private final Path state; Review comment: The name seems to me pretty logical. What is your suggestion ########## File path: modules/core/src/main/java/org/apache/ignite/internal/cdc/ChangeDataCaptureConsumerState.java ########## @@ -0,0 +1,113 @@ +/* + * 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.cdc; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.StandardOpenOption; +import java.util.Iterator; +import org.apache.ignite.IgniteException; +import org.apache.ignite.cdc.ChangeDataCaptureConsumer; +import org.apache.ignite.cdc.ChangeDataCaptureEvent; +import org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer; + +import static java.nio.file.StandardCopyOption.ATOMIC_MOVE; +import static java.nio.file.StandardCopyOption.REPLACE_EXISTING; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.FILE_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.TMP_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer.POINTER_SIZE; + +/** + * CDC Consumer state. + * + * Each time {@link ChangeDataCaptureConsumer#onEvents(Iterator)} returns {@code true} + * current offset in WAL segment saved to file. + * This allows to the {@link ChangeDataCaptureConsumer} to continue consumption of the {@link ChangeDataCaptureEvent} + * from the last saved offset in case of fail or restart. + * + * @see ChangeDataCaptureConsumer#onEvents(Iterator) + * @see ChangeDataCapture + */ +public class ChangeDataCaptureConsumerState { + /** State file. */ + private final Path state; + + /** Temp state file. */ + private final Path tmp; Review comment: The name seems to me pretty logical. What is your suggestion ########## File path: modules/core/src/main/java/org/apache/ignite/internal/cdc/ChangeDataCaptureConsumerState.java ########## @@ -0,0 +1,113 @@ +/* + * 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.cdc; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.StandardOpenOption; +import java.util.Iterator; +import org.apache.ignite.IgniteException; +import org.apache.ignite.cdc.ChangeDataCaptureConsumer; +import org.apache.ignite.cdc.ChangeDataCaptureEvent; +import org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer; + +import static java.nio.file.StandardCopyOption.ATOMIC_MOVE; +import static java.nio.file.StandardCopyOption.REPLACE_EXISTING; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.FILE_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.TMP_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer.POINTER_SIZE; + +/** + * CDC Consumer state. + * + * Each time {@link ChangeDataCaptureConsumer#onEvents(Iterator)} returns {@code true} + * current offset in WAL segment saved to file. + * This allows to the {@link ChangeDataCaptureConsumer} to continue consumption of the {@link ChangeDataCaptureEvent} + * from the last saved offset in case of fail or restart. + * + * @see ChangeDataCaptureConsumer#onEvents(Iterator) + * @see ChangeDataCapture + */ +public class ChangeDataCaptureConsumerState { + /** State file. */ + private final Path state; Review comment: The name seems to me pretty logical. What is your suggestion? ########## File path: modules/core/src/main/java/org/apache/ignite/internal/cdc/ChangeDataCaptureConsumerState.java ########## @@ -0,0 +1,113 @@ +/* + * 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.cdc; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.StandardOpenOption; +import java.util.Iterator; +import org.apache.ignite.IgniteException; +import org.apache.ignite.cdc.ChangeDataCaptureConsumer; +import org.apache.ignite.cdc.ChangeDataCaptureEvent; +import org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer; + +import static java.nio.file.StandardCopyOption.ATOMIC_MOVE; +import static java.nio.file.StandardCopyOption.REPLACE_EXISTING; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.FILE_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.file.FilePageStoreManager.TMP_SUFFIX; +import static org.apache.ignite.internal.processors.cache.persistence.wal.WALPointer.POINTER_SIZE; + +/** + * CDC Consumer state. + * + * Each time {@link ChangeDataCaptureConsumer#onEvents(Iterator)} returns {@code true} + * current offset in WAL segment saved to file. + * This allows to the {@link ChangeDataCaptureConsumer} to continue consumption of the {@link ChangeDataCaptureEvent} + * from the last saved offset in case of fail or restart. + * + * @see ChangeDataCaptureConsumer#onEvents(Iterator) + * @see ChangeDataCapture + */ +public class ChangeDataCaptureConsumerState { + /** State file. */ + private final Path state; + + /** Temp state file. */ + private final Path tmp; Review comment: The name seems to me pretty logical. 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