modules/core/src/main/java/org/apache/ignite/internal/processors/cache/mvcc/txlog/TxLogTree.java

/*
 * 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.mvcc.txlog;

import java.util.concurrent.atomic.AtomicLong;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.internal.pagemem.PageMemory;
import org.apache.ignite.internal.pagemem.wal.IgniteWriteAheadLogManager;
import org.apache.ignite.internal.processors.cache.persistence.tree.BPlusTree;
import org.apache.ignite.internal.processors.cache.persistence.tree.io.BPlusIO;
import org.apache.ignite.internal.processors.cache.persistence.tree.reuse.ReuseList;
import org.apache.ignite.internal.processors.failure.FailureProcessor;

/**
 *
 */
public class TxLogTree extends BPlusTree<TxKey, TxRow> {
    /**
     * @param pageMem Page memory.
     * @param wal Write ahead log manager
     * @param metaPageId Tree metapage id.
     * @param reuseList Reuse list
     * @param failureProcessor Failure processor.
     * @param initNew {@code True} if new tree should be created.
     * @throws IgniteCheckedException If fails.
     */
    public TxLogTree(PageMemory pageMem,
        IgniteWriteAheadLogManager wal, long metaPageId,
        ReuseList reuseList, FailureProcessor failureProcessor,
        boolean initNew) throws IgniteCheckedException {
        super(TxLog.TX_LOG_CACHE_NAME, TxLog.TX_LOG_CACHE_ID, pageMem, wal, new AtomicLong(), metaPageId,
            reuseList, TxLogInnerIO.VERSIONS, TxLogLeafIO.VERSIONS, failureProcessor);

        initTree(initNew);
    }

    /** {@inheritDoc} */
    @Override protected int compare(BPlusIO<TxKey> io, long pageAddr, int idx, TxKey row) {
        return ((TxLogIO)io).compare(pageAddr, io.offset(idx), row);
    }

    /** {@inheritDoc} */
    @Override public TxRow getRow(BPlusIO<TxKey> io, long pageAddr,
                                  int idx, Object ignored) throws IgniteCheckedException {
        return (TxRow) io.getLookupRow(this, pageAddr, idx);
    }
}