| /* |
| * 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.cassandra.db.index; |
| |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.Future; |
| |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.config.ColumnDefinition; |
| import org.apache.cassandra.db.*; |
| import org.apache.cassandra.db.composites.CellName; |
| import org.apache.cassandra.db.composites.CellNameType; |
| import org.apache.cassandra.db.marshal.AbstractType; |
| import org.apache.cassandra.dht.LocalPartitioner; |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| import org.apache.cassandra.utils.FBUtilities; |
| import org.apache.cassandra.utils.concurrent.OpOrder; |
| |
| /** |
| * Implements a secondary index for a column family using a second column family |
| * in which the row keys are indexed values, and column names are base row keys. |
| */ |
| public abstract class AbstractSimplePerColumnSecondaryIndex extends PerColumnSecondaryIndex |
| { |
| protected ColumnFamilyStore indexCfs; |
| |
| // SecondaryIndex "forces" a set of ColumnDefinition. However this class (and thus it's subclass) |
| // only support one def per index. So inline it in a field for 1) convenience and 2) avoid creating |
| // an iterator each time we need to access it. |
| // TODO: we should fix SecondaryIndex API |
| protected ColumnDefinition columnDef; |
| |
| public void init() |
| { |
| assert baseCfs != null && columnDefs != null && columnDefs.size() == 1; |
| |
| columnDef = columnDefs.iterator().next(); |
| |
| CellNameType indexComparator = SecondaryIndex.getIndexComparator(baseCfs.metadata, columnDef); |
| CFMetaData indexedCfMetadata = CFMetaData.newIndexMetadata(baseCfs.metadata, columnDef, indexComparator); |
| indexCfs = ColumnFamilyStore.createColumnFamilyStore(baseCfs.keyspace, |
| indexedCfMetadata.cfName, |
| new LocalPartitioner(getIndexKeyComparator()), |
| indexedCfMetadata, |
| baseCfs.getTracker().loadsstables); |
| } |
| |
| protected AbstractType<?> getIndexKeyComparator() |
| { |
| return columnDef.type; |
| } |
| |
| @Override |
| String indexTypeForGrouping() |
| { |
| return "_internal_"; |
| } |
| |
| protected abstract CellName makeIndexColumnName(ByteBuffer rowKey, Cell cell); |
| |
| protected abstract ByteBuffer getIndexedValue(ByteBuffer rowKey, Cell cell); |
| |
| protected abstract AbstractType getExpressionComparator(); |
| |
| public String expressionString(IndexExpression expr) |
| { |
| return String.format("'%s.%s %s %s'", |
| baseCfs.name, |
| getExpressionComparator().getString(expr.column), |
| expr.operator, |
| baseCfs.metadata.getColumnDefinition(expr.column).type.getString(expr.value)); |
| } |
| |
| public void delete(ByteBuffer rowKey, Cell cell, OpOrder.Group opGroup) |
| { |
| deleteForCleanup(rowKey, cell, opGroup); |
| } |
| |
| public void deleteForCleanup(ByteBuffer rowKey, Cell cell, OpOrder.Group opGroup) |
| { |
| if (!cell.isLive()) |
| return; |
| |
| DecoratedKey valueKey = getIndexKeyFor(getIndexedValue(rowKey, cell)); |
| int localDeletionTime = (int) (System.currentTimeMillis() / 1000); |
| ColumnFamily cfi = ArrayBackedSortedColumns.factory.create(indexCfs.metadata, false, 1); |
| cfi.addTombstone(makeIndexColumnName(rowKey, cell), localDeletionTime, cell.timestamp()); |
| indexCfs.apply(valueKey, cfi, SecondaryIndexManager.nullUpdater, opGroup, null); |
| if (logger.isTraceEnabled()) |
| logger.trace("removed index entry for cleaned-up value {}:{}", valueKey, cfi); |
| } |
| |
| public void insert(ByteBuffer rowKey, Cell cell, OpOrder.Group opGroup) |
| { |
| DecoratedKey valueKey = getIndexKeyFor(getIndexedValue(rowKey, cell)); |
| ColumnFamily cfi = ArrayBackedSortedColumns.factory.create(indexCfs.metadata, false, 1); |
| CellName name = makeIndexColumnName(rowKey, cell); |
| if (cell instanceof ExpiringCell) |
| { |
| ExpiringCell ec = (ExpiringCell) cell; |
| cfi.addColumn(new BufferExpiringCell(name, ByteBufferUtil.EMPTY_BYTE_BUFFER, ec.timestamp(), ec.getTimeToLive(), ec.getLocalDeletionTime())); |
| } |
| else |
| { |
| cfi.addColumn(new BufferCell(name, ByteBufferUtil.EMPTY_BYTE_BUFFER, cell.timestamp())); |
| } |
| if (logger.isTraceEnabled()) |
| logger.trace("applying index row {} in {}", indexCfs.metadata.getKeyValidator().getString(valueKey.getKey()), cfi); |
| |
| indexCfs.apply(valueKey, cfi, SecondaryIndexManager.nullUpdater, opGroup, null); |
| } |
| |
| public void update(ByteBuffer rowKey, Cell oldCol, Cell col, OpOrder.Group opGroup) |
| { |
| // insert the new value before removing the old one, so we never have a period |
| // where the row is invisible to both queries (the opposite seems preferable); see CASSANDRA-5540 |
| insert(rowKey, col, opGroup); |
| if (SecondaryIndexManager.shouldCleanupOldValue(oldCol, col)) |
| delete(rowKey, oldCol, opGroup); |
| } |
| |
| public void removeIndex(ByteBuffer columnName) |
| { |
| indexCfs.invalidate(); |
| } |
| |
| public void forceBlockingFlush() |
| { |
| Future<?> wait; |
| // we synchronise on the baseCfs to make sure we are ordered correctly with other flushes to the base CFS |
| synchronized (baseCfs.getTracker()) |
| { |
| wait = indexCfs.forceFlush(); |
| } |
| FBUtilities.waitOnFuture(wait); |
| } |
| |
| public void invalidate() |
| { |
| indexCfs.invalidate(); |
| } |
| |
| public void truncateBlocking(long truncatedAt) |
| { |
| indexCfs.discardSSTables(truncatedAt); |
| } |
| |
| public ColumnFamilyStore getIndexCfs() |
| { |
| return indexCfs; |
| } |
| |
| public String getIndexName() |
| { |
| return indexCfs.name; |
| } |
| |
| public void reload() |
| { |
| indexCfs.metadata.reloadSecondaryIndexMetadata(baseCfs.metadata); |
| indexCfs.reload(); |
| } |
| |
| public long estimateResultRows() |
| { |
| return getIndexCfs().getMeanColumns(); |
| } |
| |
| public boolean validate(ByteBuffer rowKey, Cell cell) |
| { |
| return getIndexedValue(rowKey, cell).remaining() < FBUtilities.MAX_UNSIGNED_SHORT |
| && makeIndexColumnName(rowKey, cell).toByteBuffer().remaining() < FBUtilities.MAX_UNSIGNED_SHORT; |
| } |
| } |