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org.apache.asterix.common.ioopcallbacks.LSMBTreeWithBuddyIOOperationCallback Maven / Gradle / Ivy
/*
* 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.asterix.common.ioopcallbacks;
import java.util.List;
import org.apache.hyracks.api.exceptions.HyracksDataException;
import org.apache.hyracks.storage.am.lsm.btree.impls.LSMBTreeWithBuddyDiskComponent;
import org.apache.hyracks.storage.am.lsm.common.api.ILSMComponent;
import org.apache.hyracks.storage.am.lsm.common.impls.LSMOperationType;
public class LSMBTreeWithBuddyIOOperationCallback extends AbstractLSMIOOperationCallback {
@Override
public void afterOperation(LSMOperationType opType, List oldComponents, ILSMComponent newComponent)
throws HyracksDataException {
if (newComponent != null) {
LSMBTreeWithBuddyDiskComponent btreeComponent = (LSMBTreeWithBuddyDiskComponent) newComponent;
putLSNIntoMetadata(btreeComponent.getBTree(), oldComponents);
putLSNIntoMetadata(btreeComponent.getBuddyBTree(), oldComponents);
}
}
@Override
public long getComponentLSN(List diskComponents) throws HyracksDataException {
if (diskComponents == null) {
// Implies a flush IO operation
synchronized (this) {
long lsn = mutableLastLSNs[readIndex];
return lsn;
}
}
// Get max LSN from the diskComponents. Implies a merge IO operation or Recovery operation.
long maxLSN = -1;
for (Object o : diskComponents) {
LSMBTreeWithBuddyDiskComponent btreeComponent = (LSMBTreeWithBuddyDiskComponent) o;
maxLSN = Math.max(getTreeIndexLSN(btreeComponent.getBTree()), maxLSN);
}
return maxLSN;
}
}