CompoundConfiguration (Apache HBase

java.lang.Object
- org.apache.hadoop.conf.Configuration
- - org.apache.hadoop.hbase.CompoundConfiguration

所有已实现的接口:

Iterable<Map.Entry<String,String>>, org.apache.hadoop.io.Writable
```
@InterfaceAudience.Private
public class CompoundConfiguration
extends org.apache.hadoop.conf.Configuration
```
Do a shallow merge of multiple KV configuration pools. This is a very useful utility class to easily add per-object configurations in addition to wider scope settings. This is different from Configuration.addResource() functionality, which performs a deep merge and mutates the common data structure.
The iterator on CompoundConfiguration is unmodifiable. Obtaining iterator is an expensive operation.
For clarity: the shallow merge allows the user to mutate either of the configuration objects and have changes reflected everywhere. In contrast to a deep merge, that requires you to explicitly know all applicable copies to propagate changes. WARNING: The values set in the CompoundConfiguration are do not handle Property variable substitution. However, if they are set in the underlying configuration substitutions are done.

嵌套类概要
- 从类继承的嵌套类/接口 org.apache.hadoop.conf.Configuration
  org.apache.hadoop.conf.Configuration.DeprecationDelta, org.apache.hadoop.conf.Configuration.IntegerRanges

构造器概要

构造器
构造器和说明

CompoundConfiguration()
Default Constructor.

构造器
构造器和说明
`CompoundConfiguration()` Default Constructor.

方法概要

所有方法实例方法具体方法
限定符和类型	方法和说明
`CompoundConfiguration`	`add(org.apache.hadoop.conf.Configuration conf)` Add Hadoop Configuration object to config list.
`CompoundConfiguration`	`addBytesMap(Map<Bytes,Bytes> map)` Add Bytes map to config list.
`CompoundConfiguration`	`addStringMap(Map<String,String> map)` Add String map to config list.
`void`	`clear()` These methods are unsupported, and no code using CompoundConfiguration depend upon them.
`String`	`get(String key)`
`String`	`get(String name, String defaultValue)` Get the value of the `name`.
`Class<?>`	`getClassByName(String name)`
`String`	`getRaw(String key)`
`Iterator<Map.Entry<String,String>>`	`iterator()`
`void`	`set(String name, String value)`
`int`	`size()`
`String`	`toString()`
`void`	`write(DataOutput out)`
`void`	`writeXml(OutputStream out)`

从类继承的方法 org.apache.hadoop.conf.Configuration
addDefaultResource, addDeprecation, addDeprecation, addDeprecation, addDeprecation, addDeprecations, addResource, addResource, addResource, addResource, addResource, addResource, addResource, addResource, addResource, addResource, addResource, dumpConfiguration, dumpConfiguration, dumpDeprecatedKeys, getBoolean, getClass, getClass, getClassByNameOrNull, getClasses, getClassLoader, getConfResourceAsInputStream, getConfResourceAsReader, getDouble, getEnum, getFile, getFinalParameters, getFloat, getInstances, getInt, getInts, getLocalPath, getLong, getLongBytes, getPassword, getPasswordFromConfig, getPasswordFromCredentialProviders, getPattern, getPropertySources, getProps, getPropsWithPrefix, getRange, getResource, getSocketAddr, getSocketAddr, getStringCollection, getStrings, getStrings, getTimeDuration, getTimeDurations, getTrimmed, getTrimmed, getTrimmedStringCollection, getTrimmedStrings, getTrimmedStrings, getValByRegex, hasWarnedDeprecation, isDeprecated, main, onlyKeyExists, readFields, reloadConfiguration, reloadExistingConfigurations, set, setAllowNullValueProperties, setBoolean, setBooleanIfUnset, setClass, setClassLoader, setDeprecatedProperties, setDouble, setEnum, setFloat, setIfUnset, setInt, setLong, setPattern, setQuietMode, setRestrictSystemProperties, setRestrictSystemPropertiesDefault, setRestrictSystemProps, setSocketAddr, setStrings, setTimeDuration, unset, updateConnectAddr, updateConnectAddr, writeXml, writeXml

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

从接口继承的方法 java.lang.Iterable
forEach, spliterator

- 构造器详细资料
  - CompoundConfiguration
```
public CompoundConfiguration()
```
    Default Constructor. Initializes empty configuration
- 方法详细资料
  - add
```
public CompoundConfiguration add(org.apache.hadoop.conf.Configuration conf)
```
    Add Hadoop Configuration object to config list. The added configuration overrides the previous ones if there are name collisions.
    
    参数:
    
    conf - configuration object
    
    返回:
    
    this, for builder pattern
  - addBytesMap
```
public CompoundConfiguration addBytesMap(Map<Bytes,Bytes> map)
```
    Add Bytes map to config list. This map is generally created by HTableDescriptor or HColumnDescriptor, but can be abstractly used. The added configuration overrides the previous ones if there are name collisions.
    
    参数:
    
    map - Bytes map
    
    返回:
    
    this, for builder pattern
  - addStringMap
```
public CompoundConfiguration addStringMap(Map<String,String> map)
```
    Add String map to config list. This map is generally created by HTableDescriptor or HColumnDescriptor, but can be abstractly used. The added configuration overrides the previous ones if there are name collisions.
    
    返回:
    
    this, for builder pattern
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 org.apache.hadoop.conf.Configuration
  - get
```
public String get(String key)
```
    覆盖:
    
    get 在类中 org.apache.hadoop.conf.Configuration
  - getRaw
```
public String getRaw(String key)
```
    覆盖:
    
    getRaw 在类中 org.apache.hadoop.conf.Configuration
  - getClassByName
```
public Class<?> getClassByName(String name)
                        throws ClassNotFoundException
```
    覆盖:
    
    getClassByName 在类中 org.apache.hadoop.conf.Configuration
    
    抛出:
    
    ClassNotFoundException
  - size
```
public int size()
```
    覆盖:
    
    size 在类中 org.apache.hadoop.conf.Configuration
  - get
```
public String get(String name,
                  String defaultValue)
```
    Get the value of the name. If the key is deprecated, it returns the value of the first key which replaces the deprecated key and is not null. If no such property exists, then defaultValue is returned. The CompooundConfiguration does not do property substitution. To do so we need Configuration.getProps to be protected or package visible. Though in hadoop2 it is protected, in hadoop1 the method is private and not accessible. All of the get* methods call this overridden get method.
    
    覆盖:
    
    get 在类中 org.apache.hadoop.conf.Configuration
    
    参数:
    
    name - property name.
    
    defaultValue - default value.
    
    返回:
    
    property value, or defaultValue if the property doesn't exist.
  - iterator
```
public Iterator<Map.Entry<String,String>> iterator()
```
    指定者:
    
    iterator 在接口中 Iterable<Map.Entry<String,String>>
    
    覆盖:
    
    iterator 在类中 org.apache.hadoop.conf.Configuration
  - set
```
public void set(String name,
                String value)
```
    覆盖:
    
    set 在类中 org.apache.hadoop.conf.Configuration
  - clear
```
public void clear()
```
    These methods are unsupported, and no code using CompoundConfiguration depend upon them. Quickly abort upon any attempts to use them.
    
    覆盖:
    
    clear 在类中 org.apache.hadoop.conf.Configuration
  - write
```
public void write(DataOutput out)
           throws IOException
```
    指定者:
    
    write 在接口中 org.apache.hadoop.io.Writable
    
    覆盖:
    
    write 在类中 org.apache.hadoop.conf.Configuration
    
    抛出:
    
    IOException
  - writeXml
```
public void writeXml(OutputStream out)
              throws IOException
```
    覆盖:
    
    writeXml 在类中 org.apache.hadoop.conf.Configuration
    
    抛出:
    
    IOException

类 CompoundConfiguration

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.conf.Configuration

构造器概要

方法概要

从类继承的方法 org.apache.hadoop.conf.Configuration

从类继承的方法 java.lang.Object

从接口继承的方法 java.lang.Iterable

构造器详细资料

CompoundConfiguration

方法详细资料

add

addBytesMap

addStringMap

toString

get

getRaw

getClassByName

size

get

iterator

set

clear

write

writeXml