/**
*
* 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;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.regex.Matcher;
import org.apache.hadoop.hbase.util.ByteStringer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.BytesBytesPair;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.ColumnFamilySchema;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameStringPair;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.TableSchema;
import org.apache.hadoop.hbase.regionserver.BloomType;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Writables;
import org.apache.hadoop.io.WritableComparable;
import com.google.protobuf.InvalidProtocolBufferException;
/**
* HTableDescriptor contains the details about an HBase table such as the descriptors of
* all the column families, is the table a catalog table, <code> -ROOT- </code> or
* <code> hbase:meta </code>, if the table is read only, the maximum size of the memstore,
* when the region split should occur, coprocessors associated with it etc...
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class HTableDescriptor implements WritableComparable<HTableDescriptor> {
private static final Log LOG = LogFactory.getLog(HTableDescriptor.class);
/**
* Changes prior to version 3 were not recorded here.
* Version 3 adds metadata as a map where keys and values are byte[].
* Version 4 adds indexes
* Version 5 removed transactional pollution -- e.g. indexes
* Version 6 changed metadata to BytesBytesPair in PB
* Version 7 adds table-level configuration
*/
private static final byte TABLE_DESCRIPTOR_VERSION = 7;
private TableName name = null;
/**
* A map which holds the metadata information of the table. This metadata
* includes values like IS_ROOT, IS_META, DEFERRED_LOG_FLUSH, SPLIT_POLICY,
* MAX_FILE_SIZE, READONLY, MEMSTORE_FLUSHSIZE etc...
*/
private final Map<ImmutableBytesWritable, ImmutableBytesWritable> values =
new HashMap<ImmutableBytesWritable, ImmutableBytesWritable>();
/**
* A map which holds the configuration specific to the table.
* The keys of the map have the same names as config keys and override the defaults with
* table-specific settings. Example usage may be for compactions, etc.
*/
private final Map<String, String> configuration = new HashMap<String, String>();
public static final String SPLIT_POLICY = "SPLIT_POLICY";
/**
* <em>INTERNAL</em> Used by HBase Shell interface to access this metadata
* attribute which denotes the maximum size of the store file after which
* a region split occurs
*
* @see #getMaxFileSize()
*/
public static final String MAX_FILESIZE = "MAX_FILESIZE";
private static final ImmutableBytesWritable MAX_FILESIZE_KEY =
new ImmutableBytesWritable(Bytes.toBytes(MAX_FILESIZE));
public static final String OWNER = "OWNER";
public static final ImmutableBytesWritable OWNER_KEY =
new ImmutableBytesWritable(Bytes.toBytes(OWNER));
/**
* <em>INTERNAL</em> Used by rest interface to access this metadata
* attribute which denotes if the table is Read Only
*
* @see #isReadOnly()
*/
public static final String READONLY = "READONLY";
private static final ImmutableBytesWritable READONLY_KEY =
new ImmutableBytesWritable(Bytes.toBytes(READONLY));
/**
* <em>INTERNAL</em> Used by HBase Shell interface to access this metadata
* attribute which denotes if the table is compaction enabled
*
* @see #isCompactionEnabled()
*/
public static final String COMPACTION_ENABLED = "COMPACTION_ENABLED";
private static final ImmutableBytesWritable COMPACTION_ENABLED_KEY =
new ImmutableBytesWritable(Bytes.toBytes(COMPACTION_ENABLED));
/**
* <em>INTERNAL</em> Used by HBase Shell interface to access this metadata
* attribute which represents the maximum size of the memstore after which
* its contents are flushed onto the disk
*
* @see #getMemStoreFlushSize()
*/
public static final String MEMSTORE_FLUSHSIZE = "MEMSTORE_FLUSHSIZE";
private static final ImmutableBytesWritable MEMSTORE_FLUSHSIZE_KEY =
new ImmutableBytesWritable(Bytes.toBytes(MEMSTORE_FLUSHSIZE));
/**
* <em>INTERNAL</em> Used by rest interface to access this metadata
* attribute which denotes if the table is a -ROOT- region or not
*
* @see #isRootRegion()
*/
public static final String IS_ROOT = "IS_ROOT";
private static final ImmutableBytesWritable IS_ROOT_KEY =
new ImmutableBytesWritable(Bytes.toBytes(IS_ROOT));
/**
* <em>INTERNAL</em> Used by rest interface to access this metadata
* attribute which denotes if it is a catalog table, either
* <code> hbase:meta </code> or <code> -ROOT- </code>
*
* @see #isMetaRegion()
*/
public static final String IS_META = "IS_META";
private static final ImmutableBytesWritable IS_META_KEY =
new ImmutableBytesWritable(Bytes.toBytes(IS_META));
/**
* <em>INTERNAL</em> Used by HBase Shell interface to access this metadata
* attribute which denotes if the deferred log flush option is enabled.
* @deprecated Use {@link #DURABILITY} instead.
*/
@Deprecated
public static final String DEFERRED_LOG_FLUSH = "DEFERRED_LOG_FLUSH";
@Deprecated
private static final ImmutableBytesWritable DEFERRED_LOG_FLUSH_KEY =
new ImmutableBytesWritable(Bytes.toBytes(DEFERRED_LOG_FLUSH));
/**
* <em>INTERNAL</em> {@link Durability} setting for the table.
*/
public static final String DURABILITY = "DURABILITY";
private static final ImmutableBytesWritable DURABILITY_KEY =
new ImmutableBytesWritable(Bytes.toBytes("DURABILITY"));
/**
* <em>INTERNAL</em> number of region replicas for the table.
*/
public static final String REGION_REPLICATION = "REGION_REPLICATION";
private static final ImmutableBytesWritable REGION_REPLICATION_KEY =
new ImmutableBytesWritable(Bytes.toBytes(REGION_REPLICATION));
/** Default durability for HTD is USE_DEFAULT, which defaults to HBase-global default value */
private static final Durability DEFAULT_DURABLITY = Durability.USE_DEFAULT;
/*
* The below are ugly but better than creating them each time till we
* replace booleans being saved as Strings with plain booleans. Need a
* migration script to do this. TODO.
*/
private static final ImmutableBytesWritable FALSE =
new ImmutableBytesWritable(Bytes.toBytes(Boolean.FALSE.toString()));
private static final ImmutableBytesWritable TRUE =
new ImmutableBytesWritable(Bytes.toBytes(Boolean.TRUE.toString()));
private static final boolean DEFAULT_DEFERRED_LOG_FLUSH = false;
/**
* Constant that denotes whether the table is READONLY by default and is false
*/
public static final boolean DEFAULT_READONLY = false;
/**
* Constant that denotes whether the table is compaction enabled by default
*/
public static final boolean DEFAULT_COMPACTION_ENABLED = true;
/**
* Constant that denotes the maximum default size of the memstore after which
* the contents are flushed to the store files
*/
public static final long DEFAULT_MEMSTORE_FLUSH_SIZE = 1024*1024*128L;
public static final int DEFAULT_REGION_REPLICATION = 1;
private final static Map<String, String> DEFAULT_VALUES
= new HashMap<String, String>();
private final static Set<ImmutableBytesWritable> RESERVED_KEYWORDS
= new HashSet<ImmutableBytesWritable>();
static {
DEFAULT_VALUES.put(MAX_FILESIZE,
String.valueOf(HConstants.DEFAULT_MAX_FILE_SIZE));
DEFAULT_VALUES.put(READONLY, String.valueOf(DEFAULT_READONLY));
DEFAULT_VALUES.put(MEMSTORE_FLUSHSIZE,
String.valueOf(DEFAULT_MEMSTORE_FLUSH_SIZE));
DEFAULT_VALUES.put(DEFERRED_LOG_FLUSH,
String.valueOf(DEFAULT_DEFERRED_LOG_FLUSH));
DEFAULT_VALUES.put(DURABILITY, DEFAULT_DURABLITY.name()); //use the enum name
DEFAULT_VALUES.put(REGION_REPLICATION, String.valueOf(DEFAULT_REGION_REPLICATION));
for (String s : DEFAULT_VALUES.keySet()) {
RESERVED_KEYWORDS.add(new ImmutableBytesWritable(Bytes.toBytes(s)));
}
RESERVED_KEYWORDS.add(IS_ROOT_KEY);
RESERVED_KEYWORDS.add(IS_META_KEY);
}
/**
* Cache of whether this is a meta table or not.
*/
private volatile Boolean meta = null;
/**
* Cache of whether this is root table or not.
*/
private volatile Boolean root = null;
/**
* Durability setting for the table
*/
private Durability durability = null;
/**
* Maps column family name to the respective HColumnDescriptors
*/
private final Map<byte [], HColumnDescriptor> families =
new TreeMap<byte [], HColumnDescriptor>(Bytes.BYTES_RAWCOMPARATOR);
/**
* <em> INTERNAL </em> Private constructor used internally creating table descriptors for
* catalog tables, <code>hbase:meta</code> and <code>-ROOT-</code>.
*/
@InterfaceAudience.Private
protected HTableDescriptor(final TableName name, HColumnDescriptor[] families) {
setName(name);
for(HColumnDescriptor descriptor : families) {
this.families.put(descriptor.getName(), descriptor);
}
}
/**
* <em> INTERNAL </em>Private constructor used internally creating table descriptors for
* catalog tables, <code>hbase:meta</code> and <code>-ROOT-</code>.
*/
protected HTableDescriptor(final TableName name, HColumnDescriptor[] families,
Map<ImmutableBytesWritable,ImmutableBytesWritable> values) {
setName(name);
for(HColumnDescriptor descriptor : families) {
this.families.put(descriptor.getName(), descriptor);
}
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> entry:
values.entrySet()) {
setValue(entry.getKey(), entry.getValue());
}
}
/**
* Default constructor which constructs an empty object.
* For deserializing an HTableDescriptor instance only.
* @deprecated Used by Writables and Writables are going away.
*/
@Deprecated
public HTableDescriptor() {
super();
}
/**
* Construct a table descriptor specifying a TableName object
* @param name Table name.
* @see <a href="HADOOP-1581">HADOOP-1581 HBASE: Un-openable tablename bug</a>
*/
public HTableDescriptor(final TableName name) {
super();
setName(name);
}
/**
* Construct a table descriptor specifying a byte array table name
* @param name Table name.
* @see <a href="HADOOP-1581">HADOOP-1581 HBASE: Un-openable tablename bug</a>
*/
@Deprecated
public HTableDescriptor(final byte[] name) {
this(TableName.valueOf(name));
}
/**
* Construct a table descriptor specifying a String table name
* @param name Table name.
* @see <a href="HADOOP-1581">HADOOP-1581 HBASE: Un-openable tablename bug</a>
*/
@Deprecated
public HTableDescriptor(final String name) {
this(TableName.valueOf(name));
}
/**
* Construct a table descriptor by cloning the descriptor passed as a parameter.
* <p>
* Makes a deep copy of the supplied descriptor.
* Can make a modifiable descriptor from an UnmodifyableHTableDescriptor.
* @param desc The descriptor.
*/
public HTableDescriptor(final HTableDescriptor desc) {
super();
setName(desc.name);
setMetaFlags(this.name);
for (HColumnDescriptor c: desc.families.values()) {
this.families.put(c.getName(), new HColumnDescriptor(c));
}
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> e:
desc.values.entrySet()) {
setValue(e.getKey(), e.getValue());
}
for (Map.Entry<String, String> e : desc.configuration.entrySet()) {
this.configuration.put(e.getKey(), e.getValue());
}
}
/*
* Set meta flags on this table.
* IS_ROOT_KEY is set if its a -ROOT- table
* IS_META_KEY is set either if its a -ROOT- or a hbase:meta table
* Called by constructors.
* @param name
*/
private void setMetaFlags(final TableName name) {
setMetaRegion(isRootRegion() ||
name.equals(TableName.META_TABLE_NAME));
}
/**
* Check if the descriptor represents a <code> -ROOT- </code> region.
*
* @return true if this is a <code> -ROOT- </code> region
*/
public boolean isRootRegion() {
if (this.root == null) {
this.root = isSomething(IS_ROOT_KEY, false)? Boolean.TRUE: Boolean.FALSE;
}
return this.root.booleanValue();
}
/**
* <em> INTERNAL </em> Used to denote if the current table represents
* <code> -ROOT- </code> region. This is used internally by the
* HTableDescriptor constructors
*
* @param isRoot true if this is the <code> -ROOT- </code> region
*/
protected void setRootRegion(boolean isRoot) {
// TODO: Make the value a boolean rather than String of boolean.
setValue(IS_ROOT_KEY, isRoot? TRUE: FALSE);
}
/**
* Checks if this table is <code> hbase:meta </code>
* region.
*
* @return true if this table is <code> hbase:meta </code>
* region
*/
public boolean isMetaRegion() {
if (this.meta == null) {
this.meta = calculateIsMetaRegion();
}
return this.meta.booleanValue();
}
private synchronized Boolean calculateIsMetaRegion() {
byte [] value = getValue(IS_META_KEY);
return (value != null)? Boolean.valueOf(Bytes.toString(value)): Boolean.FALSE;
}
private boolean isSomething(final ImmutableBytesWritable key,
final boolean valueIfNull) {
byte [] value = getValue(key);
if (value != null) {
return Boolean.valueOf(Bytes.toString(value));
}
return valueIfNull;
}
/**
* <em> INTERNAL </em> Used to denote if the current table represents
* <code> -ROOT- </code> or <code> hbase:meta </code> region. This is used
* internally by the HTableDescriptor constructors
*
* @param isMeta true if its either <code> -ROOT- </code> or
* <code> hbase:meta </code> region
*/
protected void setMetaRegion(boolean isMeta) {
setValue(IS_META_KEY, isMeta? TRUE: FALSE);
}
/**
* Checks if the table is a <code>hbase:meta</code> table
*
* @return true if table is <code> hbase:meta </code> region.
*/
public boolean isMetaTable() {
return isMetaRegion() && !isRootRegion();
}
/**
* Getter for accessing the metadata associated with the key
*
* @param key The key.
* @return The value.
* @see #values
*/
public byte[] getValue(byte[] key) {
return getValue(new ImmutableBytesWritable(key));
}
private byte[] getValue(final ImmutableBytesWritable key) {
ImmutableBytesWritable ibw = values.get(key);
if (ibw == null)
return null;
return ibw.get();
}
/**
* Getter for accessing the metadata associated with the key
*
* @param key The key.
* @return The value.
* @see #values
*/
public String getValue(String key) {
byte[] value = getValue(Bytes.toBytes(key));
if (value == null)
return null;
return Bytes.toString(value);
}
/**
* Getter for fetching an unmodifiable {@link #values} map.
*
* @return unmodifiable map {@link #values}.
* @see #values
*/
public Map<ImmutableBytesWritable,ImmutableBytesWritable> getValues() {
// shallow pointer copy
return Collections.unmodifiableMap(values);
}
/**
* Setter for storing metadata as a (key, value) pair in {@link #values} map
*
* @param key The key.
* @param value The value.
* @see #values
*/
public HTableDescriptor setValue(byte[] key, byte[] value) {
setValue(new ImmutableBytesWritable(key), new ImmutableBytesWritable(value));
return this;
}
/*
* @param key The key.
* @param value The value.
*/
private HTableDescriptor setValue(final ImmutableBytesWritable key,
final String value) {
setValue(key, new ImmutableBytesWritable(Bytes.toBytes(value)));
return this;
}
/*
* Setter for storing metadata as a (key, value) pair in {@link #values} map
*
* @param key The key.
* @param value The value.
*/
public HTableDescriptor setValue(final ImmutableBytesWritable key,
final ImmutableBytesWritable value) {
if (key.compareTo(DEFERRED_LOG_FLUSH_KEY) == 0) {
boolean isDeferredFlush = Boolean.valueOf(Bytes.toString(value.get()));
LOG.warn("HTableDescriptor property:" + DEFERRED_LOG_FLUSH + " is deprecated, " +
"use " + DURABILITY + " instead");
setDurability(isDeferredFlush ? Durability.ASYNC_WAL : DEFAULT_DURABLITY);
return this;
}
values.put(key, value);
return this;
}
/**
* Setter for storing metadata as a (key, value) pair in {@link #values} map
*
* @param key The key.
* @param value The value.
* @see #values
*/
public HTableDescriptor setValue(String key, String value) {
if (value == null) {
remove(key);
} else {
setValue(Bytes.toBytes(key), Bytes.toBytes(value));
}
return this;
}
/**
* Remove metadata represented by the key from the {@link #values} map
*
* @param key Key whose key and value we're to remove from HTableDescriptor
* parameters.
*/
public void remove(final String key) {
remove(new ImmutableBytesWritable(Bytes.toBytes(key)));
}
/**
* Remove metadata represented by the key from the {@link #values} map
*
* @param key Key whose key and value we're to remove from HTableDescriptor
* parameters.
*/
public void remove(ImmutableBytesWritable key) {
values.remove(key);
}
/**
* Remove metadata represented by the key from the {@link #values} map
*
* @param key Key whose key and value we're to remove from HTableDescriptor
* parameters.
*/
public void remove(final byte [] key) {
remove(new ImmutableBytesWritable(key));
}
/**
* Check if the readOnly flag of the table is set. If the readOnly flag is
* set then the contents of the table can only be read from but not modified.
*
* @return true if all columns in the table should be read only
*/
public boolean isReadOnly() {
return isSomething(READONLY_KEY, DEFAULT_READONLY);
}
/**
* Setting the table as read only sets all the columns in the table as read
* only. By default all tables are modifiable, but if the readOnly flag is
* set to true then the contents of the table can only be read but not modified.
*
* @param readOnly True if all of the columns in the table should be read
* only.
*/
public HTableDescriptor setReadOnly(final boolean readOnly) {
return setValue(READONLY_KEY, readOnly? TRUE: FALSE);
}
/**
* Check if the compaction enable flag of the table is true. If flag is
* false then no minor/major compactions will be done in real.
*
* @return true if table compaction enabled
*/
public boolean isCompactionEnabled() {
return isSomething(COMPACTION_ENABLED_KEY, DEFAULT_COMPACTION_ENABLED);
}
/**
* Setting the table compaction enable flag.
*
* @param isEnable True if enable compaction.
*/
public HTableDescriptor setCompactionEnabled(final boolean isEnable) {
setValue(COMPACTION_ENABLED_KEY, isEnable ? TRUE : FALSE);
return this;
}
/**
* Sets the {@link Durability} setting for the table. This defaults to Durability.USE_DEFAULT.
* @param durability enum value
*/
public HTableDescriptor setDurability(Durability durability) {
this.durability = durability;
setValue(DURABILITY_KEY, durability.name());
return this;
}
/**
* Returns the durability setting for the table.
* @return durability setting for the table.
*/
public Durability getDurability() {
if (this.durability == null) {
byte[] durabilityValue = getValue(DURABILITY_KEY);
if (durabilityValue == null) {
this.durability = DEFAULT_DURABLITY;
} else {
try {
this.durability = Durability.valueOf(Bytes.toString(durabilityValue));
} catch (IllegalArgumentException ex) {
LOG.warn("Received " + ex + " because Durability value for HTableDescriptor"
+ " is not known. Durability:" + Bytes.toString(durabilityValue));
this.durability = DEFAULT_DURABLITY;
}
}
}
return this.durability;
}
/**
* Get the name of the table
*
* @return TableName
*/
public TableName getTableName() {
return name;
}
/**
* Get the name of the table as a byte array.
*
* @return name of table
* @deprecated Use {@link #getTableName()} instead
*/
@Deprecated
public byte[] getName() {
return name.getName();
}
/**
* Get the name of the table as a String
*
* @return name of table as a String
*/
public String getNameAsString() {
return name.getNameAsString();
}
/**
* This sets the class associated with the region split policy which
* determines when a region split should occur. The class used by
* default is defined in {@link org.apache.hadoop.hbase.regionserver.RegionSplitPolicy}
* @param clazz the class name
*/
public HTableDescriptor setRegionSplitPolicyClassName(String clazz) {
setValue(SPLIT_POLICY, clazz);
return this;
}
/**
* This gets the class associated with the region split policy which
* determines when a region split should occur. The class used by
* default is defined in {@link org.apache.hadoop.hbase.regionserver.RegionSplitPolicy}
*
* @return the class name of the region split policy for this table.
* If this returns null, the default split policy is used.
*/
public String getRegionSplitPolicyClassName() {
return getValue(SPLIT_POLICY);
}
/**
* Set the name of the table.
*
* @param name name of table
*/
@Deprecated
public HTableDescriptor setName(byte[] name) {
setName(TableName.valueOf(name));
return this;
}
@Deprecated
public HTableDescriptor setName(TableName name) {
this.name = name;
setMetaFlags(this.name);
return this;
}
/**
* Returns the maximum size upto which a region can grow to after which a region
* split is triggered. The region size is represented by the size of the biggest
* store file in that region.
*
* @return max hregion size for table, -1 if not set.
*
* @see #setMaxFileSize(long)
*/
public long getMaxFileSize() {
byte [] value = getValue(MAX_FILESIZE_KEY);
if (value != null) {
return Long.parseLong(Bytes.toString(value));
}
return -1;
}
/**
* Sets the maximum size upto which a region can grow to after which a region
* split is triggered. The region size is represented by the size of the biggest
* store file in that region, i.e. If the biggest store file grows beyond the
* maxFileSize, then the region split is triggered. This defaults to a value of
* 256 MB.
* <p>
* This is not an absolute value and might vary. Assume that a single row exceeds
* the maxFileSize then the storeFileSize will be greater than maxFileSize since
* a single row cannot be split across multiple regions
* </p>
*
* @param maxFileSize The maximum file size that a store file can grow to
* before a split is triggered.
*/
public HTableDescriptor setMaxFileSize(long maxFileSize) {
setValue(MAX_FILESIZE_KEY, Long.toString(maxFileSize));
return this;
}
/**
* Returns the size of the memstore after which a flush to filesystem is triggered.
*
* @return memory cache flush size for each hregion, -1 if not set.
*
* @see #setMemStoreFlushSize(long)
*/
public long getMemStoreFlushSize() {
byte [] value = getValue(MEMSTORE_FLUSHSIZE_KEY);
if (value != null) {
return Long.parseLong(Bytes.toString(value));
}
return -1;
}
/**
* Represents the maximum size of the memstore after which the contents of the
* memstore are flushed to the filesystem. This defaults to a size of 64 MB.
*
* @param memstoreFlushSize memory cache flush size for each hregion
*/
public HTableDescriptor setMemStoreFlushSize(long memstoreFlushSize) {
setValue(MEMSTORE_FLUSHSIZE_KEY, Long.toString(memstoreFlushSize));
return this;
}
/**
* Adds a column family.
* For the updating purpose please use {@link #modifyFamily(HColumnDescriptor)} instead.
* @param family HColumnDescriptor of family to add.
*/
public HTableDescriptor addFamily(final HColumnDescriptor family) {
if (family.getName() == null || family.getName().length <= 0) {
throw new IllegalArgumentException("Family name cannot be null or empty");
}
if (hasFamily(family.getName())) {
throw new IllegalArgumentException("Family '" +
family.getNameAsString() + "' already exists so cannot be added");
}
this.families.put(family.getName(), family);
return this;
}
/**
* Modifies the existing column family.
* @param family HColumnDescriptor of family to update
* @return this (for chained invocation)
*/
public HTableDescriptor modifyFamily(final HColumnDescriptor family) {
if (family.getName() == null || family.getName().length <= 0) {
throw new IllegalArgumentException("Family name cannot be null or empty");
}
if (!hasFamily(family.getName())) {
throw new IllegalArgumentException("Column family '" + family.getNameAsString()
+ "' does not exist");
}
this.families.put(family.getName(), family);
return this;
}
/**
* Checks to see if this table contains the given column family
* @param familyName Family name or column name.
* @return true if the table contains the specified family name
*/
public boolean hasFamily(final byte [] familyName) {
return families.containsKey(familyName);
}
/**
* @return Name of this table and then a map of all of the column family
* descriptors.
* @see #getNameAsString()
*/
@Override
public String toString() {
StringBuilder s = new StringBuilder();
s.append('\'').append(Bytes.toString(name.getName())).append('\'');
s.append(getValues(true));
for (HColumnDescriptor f : families.values()) {
s.append(", ").append(f);
}
return s.toString();
}
/**
* @return Name of this table and then a map of all of the column family
* descriptors (with only the non-default column family attributes)
*/
public String toStringCustomizedValues() {
StringBuilder s = new StringBuilder();
s.append('\'').append(Bytes.toString(name.getName())).append('\'');
s.append(getValues(false));
for(HColumnDescriptor hcd : families.values()) {
s.append(", ").append(hcd.toStringCustomizedValues());
}
return s.toString();
}
/**
* @return map of all table attributes formatted into string.
*/
public String toStringTableAttributes() {
return getValues(true).toString();
}
private StringBuilder getValues(boolean printDefaults) {
StringBuilder s = new StringBuilder();
// step 1: set partitioning and pruning
Set<ImmutableBytesWritable> reservedKeys = new TreeSet<ImmutableBytesWritable>();
Set<ImmutableBytesWritable> userKeys = new TreeSet<ImmutableBytesWritable>();
for (ImmutableBytesWritable k : values.keySet()) {
if (k == null || k.get() == null) continue;
String key = Bytes.toString(k.get());
// in this section, print out reserved keywords + coprocessor info
if (!RESERVED_KEYWORDS.contains(k) && !key.startsWith("coprocessor$")) {
userKeys.add(k);
continue;
}
// only print out IS_ROOT/IS_META if true
String value = Bytes.toString(values.get(k).get());
if (key.equalsIgnoreCase(IS_ROOT) || key.equalsIgnoreCase(IS_META)) {
if (Boolean.valueOf(value) == false) continue;
}
// see if a reserved key is a default value. may not want to print it out
if (printDefaults
|| !DEFAULT_VALUES.containsKey(key)
|| !DEFAULT_VALUES.get(key).equalsIgnoreCase(value)) {
reservedKeys.add(k);
}
}
// early exit optimization
boolean hasAttributes = !reservedKeys.isEmpty() || !userKeys.isEmpty();
if (!hasAttributes && configuration.isEmpty()) return s;
s.append(", {");
// step 2: printing attributes
if (hasAttributes) {
s.append("TABLE_ATTRIBUTES => {");
// print all reserved keys first
boolean printCommaForAttr = false;
for (ImmutableBytesWritable k : reservedKeys) {
String key = Bytes.toString(k.get());
String value = Bytes.toStringBinary(values.get(k).get());
if (printCommaForAttr) s.append(", ");
printCommaForAttr = true;
s.append(key);
s.append(" => ");
s.append('\'').append(value).append('\'');
}
if (!userKeys.isEmpty()) {
// print all non-reserved, advanced config keys as a separate subset
if (printCommaForAttr) s.append(", ");
printCommaForAttr = true;
s.append(HConstants.METADATA).append(" => ");
s.append("{");
boolean printCommaForCfg = false;
for (ImmutableBytesWritable k : userKeys) {
String key = Bytes.toString(k.get());
String value = Bytes.toStringBinary(values.get(k).get());
if (printCommaForCfg) s.append(", ");
printCommaForCfg = true;
s.append('\'').append(key).append('\'');
s.append(" => ");
s.append('\'').append(value).append('\'');
}
s.append("}");
}
}
// step 3: printing all configuration:
if (!configuration.isEmpty()) {
if (hasAttributes) {
s.append(", ");
}
s.append(HConstants.CONFIGURATION).append(" => ");
s.append('{');
boolean printCommaForConfig = false;
for (Map.Entry<String, String> e : configuration.entrySet()) {
if (printCommaForConfig) s.append(", ");
printCommaForConfig = true;
s.append('\'').append(e.getKey()).append('\'');
s.append(" => ");
s.append('\'').append(e.getValue()).append('\'');
}
s.append("}");
}
s.append("}"); // end METHOD
return s;
}
/**
* Compare the contents of the descriptor with another one passed as a parameter.
* Checks if the obj passed is an instance of HTableDescriptor, if yes then the
* contents of the descriptors are compared.
*
* @return true if the contents of the the two descriptors exactly match
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof HTableDescriptor)) {
return false;
}
return compareTo((HTableDescriptor)obj) == 0;
}
/**
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
int result = this.name.hashCode();
result ^= Byte.valueOf(TABLE_DESCRIPTOR_VERSION).hashCode();
if (this.families != null && this.families.size() > 0) {
for (HColumnDescriptor e: this.families.values()) {
result ^= e.hashCode();
}
}
result ^= values.hashCode();
result ^= configuration.hashCode();
return result;
}
/**
* <em> INTERNAL </em> This method is a part of {@link WritableComparable} interface
* and is used for de-serialization of the HTableDescriptor over RPC
* @deprecated Writables are going away. Use pb {@link #parseFrom(byte[])} instead.
*/
@Deprecated
@Override
public void readFields(DataInput in) throws IOException {
int version = in.readInt();
if (version < 3)
throw new IOException("versions < 3 are not supported (and never existed!?)");
// version 3+
name = TableName.valueOf(Bytes.readByteArray(in));
setRootRegion(in.readBoolean());
setMetaRegion(in.readBoolean());
values.clear();
configuration.clear();
int numVals = in.readInt();
for (int i = 0; i < numVals; i++) {
ImmutableBytesWritable key = new ImmutableBytesWritable();
ImmutableBytesWritable value = new ImmutableBytesWritable();
key.readFields(in);
value.readFields(in);
setValue(key, value);
}
families.clear();
int numFamilies = in.readInt();
for (int i = 0; i < numFamilies; i++) {
HColumnDescriptor c = new HColumnDescriptor();
c.readFields(in);
families.put(c.getName(), c);
}
if (version >= 7) {
int numConfigs = in.readInt();
for (int i = 0; i < numConfigs; i++) {
ImmutableBytesWritable key = new ImmutableBytesWritable();
ImmutableBytesWritable value = new ImmutableBytesWritable();
key.readFields(in);
value.readFields(in);
configuration.put(
Bytes.toString(key.get(), key.getOffset(), key.getLength()),
Bytes.toString(value.get(), value.getOffset(), value.getLength()));
}
}
}
/**
* <em> INTERNAL </em> This method is a part of {@link WritableComparable} interface
* and is used for serialization of the HTableDescriptor over RPC
* @deprecated Writables are going away.
* Use {@link com.google.protobuf.MessageLite#toByteArray} instead.
*/
@Deprecated
@Override
public void write(DataOutput out) throws IOException {
out.writeInt(TABLE_DESCRIPTOR_VERSION);
Bytes.writeByteArray(out, name.toBytes());
out.writeBoolean(isRootRegion());
out.writeBoolean(isMetaRegion());
out.writeInt(values.size());
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> e:
values.entrySet()) {
e.getKey().write(out);
e.getValue().write(out);
}
out.writeInt(families.size());
for(Iterator<HColumnDescriptor> it = families.values().iterator();
it.hasNext(); ) {
HColumnDescriptor family = it.next();
family.write(out);
}
out.writeInt(configuration.size());
for (Map.Entry<String, String> e : configuration.entrySet()) {
new ImmutableBytesWritable(Bytes.toBytes(e.getKey())).write(out);
new ImmutableBytesWritable(Bytes.toBytes(e.getValue())).write(out);
}
}
// Comparable
/**
* Compares the descriptor with another descriptor which is passed as a parameter.
* This compares the content of the two descriptors and not the reference.
*
* @return 0 if the contents of the descriptors are exactly matching,
* 1 if there is a mismatch in the contents
*/
@Override
public int compareTo(final HTableDescriptor other) {
int result = this.name.compareTo(other.name);
if (result == 0) {
result = families.size() - other.families.size();
}
if (result == 0 && families.size() != other.families.size()) {
result = Integer.valueOf(families.size()).compareTo(
Integer.valueOf(other.families.size()));
}
if (result == 0) {
for (Iterator<HColumnDescriptor> it = families.values().iterator(),
it2 = other.families.values().iterator(); it.hasNext(); ) {
result = it.next().compareTo(it2.next());
if (result != 0) {
break;
}
}
}
if (result == 0) {
// punt on comparison for ordering, just calculate difference
result = this.values.hashCode() - other.values.hashCode();
if (result < 0)
result = -1;
else if (result > 0)
result = 1;
}
if (result == 0) {
result = this.configuration.hashCode() - other.configuration.hashCode();
if (result < 0)
result = -1;
else if (result > 0)
result = 1;
}
return result;
}
/**
* Returns an unmodifiable collection of all the {@link HColumnDescriptor}
* of all the column families of the table.
*
* @return Immutable collection of {@link HColumnDescriptor} of all the
* column families.
*/
public Collection<HColumnDescriptor> getFamilies() {
return Collections.unmodifiableCollection(this.families.values());
}
/**
* Returns the configured replicas per region
*/
public int getRegionReplication() {
byte[] val = getValue(REGION_REPLICATION_KEY);
if (val == null || val.length == 0) {
return DEFAULT_REGION_REPLICATION;
}
return Integer.parseInt(Bytes.toString(val));
}
/**
* Sets the number of replicas per region.
* @param regionReplication the replication factor per region
*/
public HTableDescriptor setRegionReplication(int regionReplication) {
setValue(REGION_REPLICATION_KEY,
new ImmutableBytesWritable(Bytes.toBytes(Integer.toString(regionReplication))));
return this;
}
/**
* Returns all the column family names of the current table. The map of
* HTableDescriptor contains mapping of family name to HColumnDescriptors.
* This returns all the keys of the family map which represents the column
* family names of the table.
*
* @return Immutable sorted set of the keys of the families.
*/
public Set<byte[]> getFamiliesKeys() {
return Collections.unmodifiableSet(this.families.keySet());
}
/**
* Returns an array all the {@link HColumnDescriptor} of the column families
* of the table.
*
* @return Array of all the HColumnDescriptors of the current table
*
* @see #getFamilies()
*/
public HColumnDescriptor[] getColumnFamilies() {
Collection<HColumnDescriptor> hColumnDescriptors = getFamilies();
return hColumnDescriptors.toArray(new HColumnDescriptor[hColumnDescriptors.size()]);
}
/**
* Returns the HColumnDescriptor for a specific column family with name as
* specified by the parameter column.
*
* @param column Column family name
* @return Column descriptor for the passed family name or the family on
* passed in column.
*/
public HColumnDescriptor getFamily(final byte [] column) {
return this.families.get(column);
}
/**
* Removes the HColumnDescriptor with name specified by the parameter column
* from the table descriptor
*
* @param column Name of the column family to be removed.
* @return Column descriptor for the passed family name or the family on
* passed in column.
*/
public HColumnDescriptor removeFamily(final byte [] column) {
return this.families.remove(column);
}
/**
* Add a table coprocessor to this table. The coprocessor
* type must be {@link org.apache.hadoop.hbase.coprocessor.RegionObserver}
* or Endpoint.
* It won't check if the class can be loaded or not.
* Whether a coprocessor is loadable or not will be determined when
* a region is opened.
* @param className Full class name.
* @throws IOException
*/
public HTableDescriptor addCoprocessor(String className) throws IOException {
addCoprocessor(className, null, Coprocessor.PRIORITY_USER, null);
return this;
}
/**
* Add a table coprocessor to this table. The coprocessor
* type must be {@link org.apache.hadoop.hbase.coprocessor.RegionObserver}
* or Endpoint.
* It won't check if the class can be loaded or not.
* Whether a coprocessor is loadable or not will be determined when
* a region is opened.
* @param jarFilePath Path of the jar file. If it's null, the class will be
* loaded from default classloader.
* @param className Full class name.
* @param priority Priority
* @param kvs Arbitrary key-value parameter pairs passed into the coprocessor.
* @throws IOException
*/
public HTableDescriptor addCoprocessor(String className, Path jarFilePath,
int priority, final Map<String, String> kvs)
throws IOException {
if (hasCoprocessor(className)) {
throw new IOException("Coprocessor " + className + " already exists.");
}
// validate parameter kvs
StringBuilder kvString = new StringBuilder();
if (kvs != null) {
for (Map.Entry<String, String> e: kvs.entrySet()) {
if (!e.getKey().matches(HConstants.CP_HTD_ATTR_VALUE_PARAM_KEY_PATTERN)) {
throw new IOException("Illegal parameter key = " + e.getKey());
}
if (!e.getValue().matches(HConstants.CP_HTD_ATTR_VALUE_PARAM_VALUE_PATTERN)) {
throw new IOException("Illegal parameter (" + e.getKey() +
") value = " + e.getValue());
}
if (kvString.length() != 0) {
kvString.append(',');
}
kvString.append(e.getKey());
kvString.append('=');
kvString.append(e.getValue());
}
}
// generate a coprocessor key
int maxCoprocessorNumber = 0;
Matcher keyMatcher;
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> e:
this.values.entrySet()) {
keyMatcher =
HConstants.CP_HTD_ATTR_KEY_PATTERN.matcher(
Bytes.toString(e.getKey().get()));
if (!keyMatcher.matches()) {
continue;
}
maxCoprocessorNumber = Math.max(Integer.parseInt(keyMatcher.group(1)),
maxCoprocessorNumber);
}
maxCoprocessorNumber++;
String key = "coprocessor$" + Integer.toString(maxCoprocessorNumber);
String value = ((jarFilePath == null)? "" : jarFilePath.toString()) +
"|" + className + "|" + Integer.toString(priority) + "|" +
kvString.toString();
setValue(key, value);
return this;
}
/**
* Check if the table has an attached co-processor represented by the name className
*
* @param className - Class name of the co-processor
* @return true of the table has a co-processor className
*/
public boolean hasCoprocessor(String className) {
Matcher keyMatcher;
Matcher valueMatcher;
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> e:
this.values.entrySet()) {
keyMatcher =
HConstants.CP_HTD_ATTR_KEY_PATTERN.matcher(
Bytes.toString(e.getKey().get()));
if (!keyMatcher.matches()) {
continue;
}
valueMatcher =
HConstants.CP_HTD_ATTR_VALUE_PATTERN.matcher(
Bytes.toString(e.getValue().get()));
if (!valueMatcher.matches()) {
continue;
}
// get className and compare
String clazz = valueMatcher.group(2).trim(); // classname is the 2nd field
if (clazz.equals(className.trim())) {
return true;
}
}
return false;
}
/**
* Return the list of attached co-processor represented by their name className
*
* @return The list of co-processors classNames
*/
public List<String> getCoprocessors() {
List<String> result = new ArrayList<String>();
Matcher keyMatcher;
Matcher valueMatcher;
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> e : this.values.entrySet()) {
keyMatcher = HConstants.CP_HTD_ATTR_KEY_PATTERN.matcher(Bytes.toString(e.getKey().get()));
if (!keyMatcher.matches()) {
continue;
}
valueMatcher = HConstants.CP_HTD_ATTR_VALUE_PATTERN.matcher(Bytes
.toString(e.getValue().get()));
if (!valueMatcher.matches()) {
continue;
}
result.add(valueMatcher.group(2).trim()); // classname is the 2nd field
}
return result;
}
/**
* Remove a coprocessor from those set on the table
* @param className Class name of the co-processor
*/
public void removeCoprocessor(String className) {
ImmutableBytesWritable match = null;
Matcher keyMatcher;
Matcher valueMatcher;
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> e : this.values
.entrySet()) {
keyMatcher = HConstants.CP_HTD_ATTR_KEY_PATTERN.matcher(Bytes.toString(e
.getKey().get()));
if (!keyMatcher.matches()) {
continue;
}
valueMatcher = HConstants.CP_HTD_ATTR_VALUE_PATTERN.matcher(Bytes
.toString(e.getValue().get()));
if (!valueMatcher.matches()) {
continue;
}
// get className and compare
String clazz = valueMatcher.group(2).trim(); // classname is the 2nd field
// remove the CP if it is present
if (clazz.equals(className.trim())) {
match = e.getKey();
break;
}
}
// if we found a match, remove it
if (match != null)
remove(match);
}
/**
* Returns the {@link Path} object representing the table directory under
* path rootdir
*
* Deprecated use FSUtils.getTableDir() instead.
*
* @param rootdir qualified path of HBase root directory
* @param tableName name of table
* @return {@link Path} for table
*/
@Deprecated
public static Path getTableDir(Path rootdir, final byte [] tableName) {
//This is bad I had to mirror code from FSUTils.getTableDir since
//there is no module dependency between hbase-client and hbase-server
TableName name = TableName.valueOf(tableName);
return new Path(rootdir, new Path(HConstants.BASE_NAMESPACE_DIR,
new Path(name.getNamespaceAsString(), new Path(name.getQualifierAsString()))));
}
/**
* Table descriptor for <code>hbase:meta</code> catalog table
* @deprecated Use TableDescriptors#get(TableName.META_TABLE_NAME) or
* HBaseAdmin#getTableDescriptor(TableName.META_TABLE_NAME) instead.
*/
@Deprecated
public static final HTableDescriptor META_TABLEDESC = new HTableDescriptor(
TableName.META_TABLE_NAME,
new HColumnDescriptor[] {
new HColumnDescriptor(HConstants.CATALOG_FAMILY)
// Ten is arbitrary number. Keep versions to help debugging.
.setMaxVersions(HConstants.DEFAULT_HBASE_META_VERSIONS)
.setInMemory(true)
.setBlocksize(HConstants.DEFAULT_HBASE_META_BLOCK_SIZE)
.setScope(HConstants.REPLICATION_SCOPE_LOCAL)
// Disable blooms for meta. Needs work. Seems to mess w/ getClosestOrBefore.
.setBloomFilterType(BloomType.NONE)
// Enable cache of data blocks in L1 if more than one caching tier deployed:
// e.g. if using CombinedBlockCache (BucketCache).
.setCacheDataInL1(true)
});
static {
try {
META_TABLEDESC.addCoprocessor(
"org.apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint",
null, Coprocessor.PRIORITY_SYSTEM, null);
} catch (IOException ex) {
//LOG.warn("exception in loading coprocessor for the hbase:meta table");
throw new RuntimeException(ex);
}
}
public final static String NAMESPACE_FAMILY_INFO = "info";
public final static byte[] NAMESPACE_FAMILY_INFO_BYTES = Bytes.toBytes(NAMESPACE_FAMILY_INFO);
public final static byte[] NAMESPACE_COL_DESC_BYTES = Bytes.toBytes("d");
/** Table descriptor for namespace table */
public static final HTableDescriptor NAMESPACE_TABLEDESC = new HTableDescriptor(
TableName.NAMESPACE_TABLE_NAME,
new HColumnDescriptor[] {
new HColumnDescriptor(NAMESPACE_FAMILY_INFO)
// Ten is arbitrary number. Keep versions to help debugging.
.setMaxVersions(10)
.setInMemory(true)
.setBlocksize(8 * 1024)
.setScope(HConstants.REPLICATION_SCOPE_LOCAL)
// Enable cache of data blocks in L1 if more than one caching tier deployed:
// e.g. if using CombinedBlockCache (BucketCache).
.setCacheDataInL1(true)
});
@Deprecated
public HTableDescriptor setOwner(User owner) {
return setOwnerString(owner != null ? owner.getShortName() : null);
}
// used by admin.rb:alter(table_name,*args) to update owner.
@Deprecated
public HTableDescriptor setOwnerString(String ownerString) {
if (ownerString != null) {
setValue(OWNER_KEY, ownerString);
} else {
remove(OWNER_KEY);
}
return this;
}
@Deprecated
public String getOwnerString() {
if (getValue(OWNER_KEY) != null) {
return Bytes.toString(getValue(OWNER_KEY));
}
// Note that every table should have an owner (i.e. should have OWNER_KEY set).
// hbase:meta and -ROOT- should return system user as owner, not null (see
// MasterFileSystem.java:bootstrap()).
return null;
}
/**
* @return This instance serialized with pb with pb magic prefix
* @see #parseFrom(byte[])
*/
public byte [] toByteArray() {
return ProtobufUtil.prependPBMagic(convert().toByteArray());
}
/**
* @param bytes A pb serialized {@link HTableDescriptor} instance with pb magic prefix
* @return An instance of {@link HTableDescriptor} made from <code>bytes</code>
* @throws DeserializationException
* @throws IOException
* @see #toByteArray()
*/
public static HTableDescriptor parseFrom(final byte [] bytes)
throws DeserializationException, IOException {
if (!ProtobufUtil.isPBMagicPrefix(bytes)) {
return (HTableDescriptor)Writables.getWritable(bytes, new HTableDescriptor());
}
int pblen = ProtobufUtil.lengthOfPBMagic();
TableSchema.Builder builder = TableSchema.newBuilder();
TableSchema ts;
try {
ts = builder.mergeFrom(bytes, pblen, bytes.length - pblen).build();
} catch (InvalidProtocolBufferException e) {
throw new DeserializationException(e);
}
return convert(ts);
}
/**
* @return Convert the current {@link HTableDescriptor} into a pb TableSchema instance.
*/
public TableSchema convert() {
TableSchema.Builder builder = TableSchema.newBuilder();
builder.setTableName(ProtobufUtil.toProtoTableName(getTableName()));
for (Map.Entry<ImmutableBytesWritable, ImmutableBytesWritable> e: this.values.entrySet()) {
BytesBytesPair.Builder aBuilder = BytesBytesPair.newBuilder();
aBuilder.setFirst(ByteStringer.wrap(e.getKey().get()));
aBuilder.setSecond(ByteStringer.wrap(e.getValue().get()));
builder.addAttributes(aBuilder.build());
}
for (HColumnDescriptor hcd: getColumnFamilies()) {
builder.addColumnFamilies(hcd.convert());
}
for (Map.Entry<String, String> e : this.configuration.entrySet()) {
NameStringPair.Builder aBuilder = NameStringPair.newBuilder();
aBuilder.setName(e.getKey());
aBuilder.setValue(e.getValue());
builder.addConfiguration(aBuilder.build());
}
return builder.build();
}
/**
* @param ts A pb TableSchema instance.
* @return An {@link HTableDescriptor} made from the passed in pb <code>ts</code>.
*/
public static HTableDescriptor convert(final TableSchema ts) {
List<ColumnFamilySchema> list = ts.getColumnFamiliesList();
HColumnDescriptor [] hcds = new HColumnDescriptor[list.size()];
int index = 0;
for (ColumnFamilySchema cfs: list) {
hcds[index++] = HColumnDescriptor.convert(cfs);
}
HTableDescriptor htd = new HTableDescriptor(
ProtobufUtil.toTableName(ts.getTableName()),
hcds);
for (BytesBytesPair a: ts.getAttributesList()) {
htd.setValue(a.getFirst().toByteArray(), a.getSecond().toByteArray());
}
for (NameStringPair a: ts.getConfigurationList()) {
htd.setConfiguration(a.getName(), a.getValue());
}
return htd;
}
/**
* Getter for accessing the configuration value by key
*/
public String getConfigurationValue(String key) {
return configuration.get(key);
}
/**
* Getter for fetching an unmodifiable {@link #configuration} map.
*/
public Map<String, String> getConfiguration() {
// shallow pointer copy
return Collections.unmodifiableMap(configuration);
}
/**
* Setter for storing a configuration setting in {@link #configuration} map.
* @param key Config key. Same as XML config key e.g. hbase.something.or.other.
* @param value String value. If null, removes the setting.
*/
public HTableDescriptor setConfiguration(String key, String value) {
if (value == null) {
removeConfiguration(key);
} else {
configuration.put(key, value);
}
return this;
}
/**
* Remove a config setting represented by the key from the {@link #configuration} map
*/
public void removeConfiguration(final String key) {
configuration.remove(key);
}
public static HTableDescriptor metaTableDescriptor(final Configuration conf)
throws IOException {
HTableDescriptor metaDescriptor = new HTableDescriptor(
TableName.META_TABLE_NAME,
new HColumnDescriptor[] {
new HColumnDescriptor(HConstants.CATALOG_FAMILY)
.setMaxVersions(conf.getInt(HConstants.HBASE_META_VERSIONS,
HConstants.DEFAULT_HBASE_META_VERSIONS))
.setInMemory(true)
.setBlocksize(conf.getInt(HConstants.HBASE_META_BLOCK_SIZE,
HConstants.DEFAULT_HBASE_META_BLOCK_SIZE))
.setScope(HConstants.REPLICATION_SCOPE_LOCAL)
// Disable blooms for meta. Needs work. Seems to mess w/ getClosestOrBefore.
.setBloomFilterType(BloomType.NONE)
});
metaDescriptor.addCoprocessor(
"org.apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint",
null, Coprocessor.PRIORITY_SYSTEM, null);
return metaDescriptor;
}
}