/*
* 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.hadoop.hbase.client;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.NavigableMap;
import java.util.TreeMap;
import java.util.UUID;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellScannable;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.Tag;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.io.HeapSize;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.security.access.AccessControlConstants;
import org.apache.hadoop.hbase.security.access.Permission;
import org.apache.hadoop.hbase.security.visibility.CellVisibility;
import org.apache.hadoop.hbase.security.visibility.VisibilityConstants;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.ClassSize;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ListMultimap;
import com.google.common.io.ByteArrayDataInput;
import com.google.common.io.ByteArrayDataOutput;
import com.google.common.io.ByteStreams;
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class Mutation extends OperationWithAttributes implements Row, CellScannable,
HeapSize {
public static final long MUTATION_OVERHEAD = ClassSize.align(
// This
ClassSize.OBJECT +
// row + OperationWithAttributes.attributes
2 * ClassSize.REFERENCE +
// Timestamp
1 * Bytes.SIZEOF_LONG +
// durability
ClassSize.REFERENCE +
// familyMap
ClassSize.REFERENCE +
// familyMap
ClassSize.TREEMAP);
/**
* The attribute for storing the list of clusters that have consumed the change.
*/
private static final String CONSUMED_CLUSTER_IDS = "_cs.id";
protected byte [] row = null;
protected long ts = HConstants.LATEST_TIMESTAMP;
protected Durability durability = Durability.USE_DEFAULT;
// A Map sorted by column family.
protected NavigableMap<byte [], List<Cell>> familyMap =
new TreeMap<byte [], List<Cell>>(Bytes.BYTES_COMPARATOR);
@Override
public CellScanner cellScanner() {
return CellUtil.createCellScanner(getFamilyCellMap());
}
/**
* Creates an empty list if one doesn't exist for the given column family
* or else it returns the associated list of Cell objects.
*
* @param family column family
* @return a list of Cell objects, returns an empty list if one doesn't exist.
*/
List<Cell> getCellList(byte[] family) {
List<Cell> list = this.familyMap.get(family);
if (list == null) {
list = new ArrayList<Cell>();
}
return list;
}
/*
* Create a KeyValue with this objects row key and the Put identifier.
*
* @return a KeyValue with this objects row key and the Put identifier.
*/
KeyValue createPutKeyValue(byte[] family, byte[] qualifier, long ts, byte[] value) {
return new KeyValue(this.row, family, qualifier, ts, KeyValue.Type.Put, value);
}
/**
* Create a KeyValue with this objects row key and the Put identifier.
* @param family
* @param qualifier
* @param ts
* @param value
* @param tags - Specify the Tags as an Array {@link KeyValue.Tag}
* @return a KeyValue with this objects row key and the Put identifier.
*/
KeyValue createPutKeyValue(byte[] family, byte[] qualifier, long ts, byte[] value, Tag[] tags) {
KeyValue kvWithTag = new KeyValue(this.row, family, qualifier, ts, value, tags);
return kvWithTag;
}
/*
* Create a KeyValue with this objects row key and the Put identifier.
*
* @return a KeyValue with this objects row key and the Put identifier.
*/
KeyValue createPutKeyValue(byte[] family, ByteBuffer qualifier, long ts, ByteBuffer value,
Tag[] tags) {
return new KeyValue(this.row, 0, this.row == null ? 0 : this.row.length,
family, 0, family == null ? 0 : family.length,
qualifier, ts, KeyValue.Type.Put, value, tags != null ? Arrays.asList(tags) : null);
}
/**
* Compile the column family (i.e. schema) information
* into a Map. Useful for parsing and aggregation by debugging,
* logging, and administration tools.
* @return Map
*/
@Override
public Map<String, Object> getFingerprint() {
Map<String, Object> map = new HashMap<String, Object>();
List<String> families = new ArrayList<String>();
// ideally, we would also include table information, but that information
// is not stored in each Operation instance.
map.put("families", families);
for (Map.Entry<byte [], List<Cell>> entry : this.familyMap.entrySet()) {
families.add(Bytes.toStringBinary(entry.getKey()));
}
return map;
}
/**
* Compile the details beyond the scope of getFingerprint (row, columns,
* timestamps, etc.) into a Map along with the fingerprinted information.
* Useful for debugging, logging, and administration tools.
* @param maxCols a limit on the number of columns output prior to truncation
* @return Map
*/
@Override
public Map<String, Object> toMap(int maxCols) {
// we start with the fingerprint map and build on top of it.
Map<String, Object> map = getFingerprint();
// replace the fingerprint's simple list of families with a
// map from column families to lists of qualifiers and kv details
Map<String, List<Map<String, Object>>> columns =
new HashMap<String, List<Map<String, Object>>>();
map.put("families", columns);
map.put("row", Bytes.toStringBinary(this.row));
int colCount = 0;
// iterate through all column families affected
for (Map.Entry<byte [], List<Cell>> entry : this.familyMap.entrySet()) {
// map from this family to details for each cell affected within the family
List<Map<String, Object>> qualifierDetails = new ArrayList<Map<String, Object>>();
columns.put(Bytes.toStringBinary(entry.getKey()), qualifierDetails);
colCount += entry.getValue().size();
if (maxCols <= 0) {
continue;
}
// add details for each cell
for (Cell cell: entry.getValue()) {
if (--maxCols <= 0 ) {
continue;
}
Map<String, Object> cellMap = cellToStringMap(cell);
qualifierDetails.add(cellMap);
}
}
map.put("totalColumns", colCount);
// add the id if set
if (getId() != null) {
map.put("id", getId());
}
return map;
}
private static Map<String, Object> cellToStringMap(Cell c) {
Map<String, Object> stringMap = new HashMap<String, Object>();
stringMap.put("qualifier", Bytes.toStringBinary(c.getQualifierArray(), c.getQualifierOffset(),
c.getQualifierLength()));
stringMap.put("timestamp", c.getTimestamp());
stringMap.put("vlen", c.getValueLength());
List<Tag> tags = Tag.asList(c.getTagsArray(), c.getTagsOffset(), c.getTagsLength());
if (tags != null) {
List<String> tagsString = new ArrayList<String>();
for (Tag t : tags) {
tagsString.add((t.getType()) + ":" + Bytes.toStringBinary(t.getValue()));
}
stringMap.put("tag", tagsString);
}
return stringMap;
}
/**
* Set the durability for this mutation
* @param d
*/
public Mutation setDurability(Durability d) {
this.durability = d;
return this;
}
/** Get the current durability */
public Durability getDurability() {
return this.durability;
}
/**
* Method for retrieving the put's familyMap
* @return familyMap
*/
public NavigableMap<byte [], List<Cell>> getFamilyCellMap() {
return this.familyMap;
}
/**
* Method for setting the put's familyMap
*/
public Mutation setFamilyCellMap(NavigableMap<byte [], List<Cell>> map) {
// TODO: Shut this down or move it up to be a Constructor. Get new object rather than change
// this internal data member.
this.familyMap = map;
return this;
}
/**
* Method to check if the familyMap is empty
* @return true if empty, false otherwise
*/
public boolean isEmpty() {
return familyMap.isEmpty();
}
/**
* Method for retrieving the delete's row
* @return row
*/
@Override
public byte [] getRow() {
return this.row;
}
@Override
public int compareTo(final Row d) {
return Bytes.compareTo(this.getRow(), d.getRow());
}
/**
* Method for retrieving the timestamp
* @return timestamp
*/
public long getTimeStamp() {
return this.ts;
}
/**
* Marks that the clusters with the given clusterIds have consumed the mutation
* @param clusterIds of the clusters that have consumed the mutation
*/
public Mutation setClusterIds(List<UUID> clusterIds) {
ByteArrayDataOutput out = ByteStreams.newDataOutput();
out.writeInt(clusterIds.size());
for (UUID clusterId : clusterIds) {
out.writeLong(clusterId.getMostSignificantBits());
out.writeLong(clusterId.getLeastSignificantBits());
}
setAttribute(CONSUMED_CLUSTER_IDS, out.toByteArray());
return this;
}
/**
* @return the set of clusterIds that have consumed the mutation
*/
public List<UUID> getClusterIds() {
List<UUID> clusterIds = new ArrayList<UUID>();
byte[] bytes = getAttribute(CONSUMED_CLUSTER_IDS);
if(bytes != null) {
ByteArrayDataInput in = ByteStreams.newDataInput(bytes);
int numClusters = in.readInt();
for(int i=0; i<numClusters; i++){
clusterIds.add(new UUID(in.readLong(), in.readLong()));
}
}
return clusterIds;
}
/**
* Sets the visibility expression associated with cells in this Mutation.
* It is illegal to set <code>CellVisibility</code> on <code>Delete</code> mutation.
* @param expression
*/
public Mutation setCellVisibility(CellVisibility expression) {
this.setAttribute(VisibilityConstants.VISIBILITY_LABELS_ATTR_KEY, ProtobufUtil
.toCellVisibility(expression).toByteArray());
return this;
}
/**
* @return CellVisibility associated with cells in this Mutation.
* @throws DeserializationException
*/
public CellVisibility getCellVisibility() throws DeserializationException {
byte[] cellVisibilityBytes = this.getAttribute(VisibilityConstants.VISIBILITY_LABELS_ATTR_KEY);
if (cellVisibilityBytes == null) return null;
return ProtobufUtil.toCellVisibility(cellVisibilityBytes);
}
/**
* Number of KeyValues carried by this Mutation.
* @return the total number of KeyValues
*/
public int size() {
int size = 0;
for (List<Cell> cells : this.familyMap.values()) {
size += cells.size();
}
return size;
}
/**
* @return the number of different families
*/
public int numFamilies() {
return familyMap.size();
}
/**
* @return Calculate what Mutation adds to class heap size.
*/
@Override
public long heapSize() {
long heapsize = MUTATION_OVERHEAD;
// Adding row
heapsize += ClassSize.align(ClassSize.ARRAY + this.row.length);
// Adding map overhead
heapsize +=
ClassSize.align(this.familyMap.size() * ClassSize.MAP_ENTRY);
for(Map.Entry<byte [], List<Cell>> entry : this.familyMap.entrySet()) {
//Adding key overhead
heapsize +=
ClassSize.align(ClassSize.ARRAY + entry.getKey().length);
//This part is kinds tricky since the JVM can reuse references if you
//store the same value, but have a good match with SizeOf at the moment
//Adding value overhead
heapsize += ClassSize.align(ClassSize.ARRAYLIST);
int size = entry.getValue().size();
heapsize += ClassSize.align(ClassSize.ARRAY +
size * ClassSize.REFERENCE);
for(Cell cell : entry.getValue()) {
heapsize += CellUtil.estimatedHeapSizeOf(cell);
}
}
heapsize += getAttributeSize();
heapsize += extraHeapSize();
return ClassSize.align(heapsize);
}
/**
* @return The serialized ACL for this operation, or null if none
*/
public byte[] getACL() {
return getAttribute(AccessControlConstants.OP_ATTRIBUTE_ACL);
}
/**
* @param user User short name
* @param perms Permissions for the user
*/
public Mutation setACL(String user, Permission perms) {
setAttribute(AccessControlConstants.OP_ATTRIBUTE_ACL,
ProtobufUtil.toUsersAndPermissions(user, perms).toByteArray());
return this;
}
/**
* @param perms A map of permissions for a user or users
*/
public Mutation setACL(Map<String, Permission> perms) {
ListMultimap<String, Permission> permMap = ArrayListMultimap.create();
for (Map.Entry<String, Permission> entry : perms.entrySet()) {
permMap.put(entry.getKey(), entry.getValue());
}
setAttribute(AccessControlConstants.OP_ATTRIBUTE_ACL,
ProtobufUtil.toUsersAndPermissions(permMap).toByteArray());
return this;
}
/**
* Subclasses should override this method to add the heap size of their own fields.
* @return the heap size to add (will be aligned).
*/
protected long extraHeapSize(){
return 0L;
}
/**
* @param row Row to check
* @throws IllegalArgumentException Thrown if <code>row</code> is empty or null or
* > {@link HConstants#MAX_ROW_LENGTH}
* @return <code>row</code>
*/
static byte [] checkRow(final byte [] row) {
return checkRow(row, 0, row == null? 0: row.length);
}
/**
* @param row Row to check
* @param offset
* @param length
* @throws IllegalArgumentException Thrown if <code>row</code> is empty or null or
* > {@link HConstants#MAX_ROW_LENGTH}
* @return <code>row</code>
*/
static byte [] checkRow(final byte [] row, final int offset, final int length) {
if (row == null) {
throw new IllegalArgumentException("Row buffer is null");
}
if (length == 0) {
throw new IllegalArgumentException("Row length is 0");
}
if (length > HConstants.MAX_ROW_LENGTH) {
throw new IllegalArgumentException("Row length " + length + " is > " +
HConstants.MAX_ROW_LENGTH);
}
return row;
}
static void checkRow(ByteBuffer row) {
if (row == null) {
throw new IllegalArgumentException("Row buffer is null");
}
if (row.remaining() == 0) {
throw new IllegalArgumentException("Row length is 0");
}
if (row.remaining() > HConstants.MAX_ROW_LENGTH) {
throw new IllegalArgumentException("Row length " + row.remaining() + " is > " +
HConstants.MAX_ROW_LENGTH);
}
}
}