rpuch commented on a change in pull request #566: URL: https://github.com/apache/ignite-3/pull/566#discussion_r789571812
########## File path: modules/page-memory/src/main/java/org/apache/ignite/internal/pagememory/PageSupport.java ########## @@ -0,0 +1,127 @@ +/* + * 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.pagememory; + +import org.apache.ignite.internal.pagememory.metric.IoStatisticsHolder; +import org.apache.ignite.lang.IgniteInternalCheckedException; + +/** + * Supports operations on pages. + */ +public interface PageSupport { + /** + * Returns an absolute pointer to a page, associated with the given page ID. Each pointer obtained with this method must be released by calling + * {@link #releasePage(int, long, long)}. This method will allocate a page with the given ID if it doesn't exist. + * + * @param groupId Group ID. + * @param pageId Page ID. + * @return Page pointer. + * @throws IgniteInternalCheckedException If failed. + */ + public long acquirePage(int groupId, long pageId) throws IgniteInternalCheckedException; Review comment: A nitpick: `public` is redundant in interfaces. Is it retained on purpose? ########## File path: modules/page-memory/src/main/java/org/apache/ignite/internal/pagememory/io/IoVersions.java ########## @@ -0,0 +1,128 @@ +/* + * 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.pagememory.io; + +import org.apache.ignite.internal.tostring.IgniteToStringBuilder; + +/** + * Registry for IO versions of the same type. + */ +public final class IoVersions<V extends PageIo> { + /** + * Sorted array of IO objects. + */ + private final V[] vers; + + /** + * Page type. + */ + private final int type; Review comment: How about creating an enum for page types, like `PageType`? It could encapsulate this `int`. The code using page types would become more readable (less confusion about 'what does this int mean'), more help from the compiler. -- 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]
