org.apache.oozie.util

Class XConfiguration

java.lang.Object

org.apache.hadoop.conf.Configuration

org.apache.oozie.util.XConfiguration

All Implemented Interfaces:

Iterable<Map.Entry<String,String>>, org.apache.hadoop.io.Writable

public class XConfiguration
extends org.apache.hadoop.conf.Configuration

Extends Hadoop Configuration providing a new constructor which reads an XML configuration from an InputStream.

OConfiguration(InputStream is).

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.conf.Configuration

org.apache.hadoop.conf.Configuration.DeprecationDelta, org.apache.hadoop.conf.Configuration.IntegerRanges

Field Summary

Fields

Modifier and Type	Field and Description
static String	CONFIGURATION_SUBSTITUTE_DEPTH
protected static boolean	initalized

Constructor Summary

Constructors

Constructor and Description
XConfiguration() Create an empty configuration.
XConfiguration(InputStream is) Create a configuration from an InputStream.
XConfiguration(Properties props) Create an configuration from a Properties instance.
XConfiguration(Reader reader) Create a configuration from an Reader.

Method Summary

Modifier and Type	Method and Description
static void	copy(org.apache.hadoop.conf.Configuration source, org.apache.hadoop.conf.Configuration target) Copy configuration key/value pairs from one configuration to another if a property exists in the target, it gets replaced.
String	get(String name) Get the value of the name property, null if no such property exists.
String	get(String name, String defaultValue) Get the value of the name property.
Class<?>	getClassByName(String name) This is a stop gap fix for HADOOP-4416.
String[]	getTrimmedStrings(String name) Get the comma delimited values of the name property as an array of trimmed Strings.
static void	injectDefaults(org.apache.hadoop.conf.Configuration source, org.apache.hadoop.conf.Configuration target) Injects configuration key/value pairs from one configuration to another if the key does not exist in the target configuration.
XConfiguration	resolve() Returns a new XConfiguration instance with all inline values resolved.
Properties	toProperties() Return a Properties instance with the configuration properties.
String	toXmlString() Return a string with the configuration in XML format.
String	toXmlString(boolean prolog)
XConfiguration	trim() Returns a new XConfiguration with all values trimmed.

Methods inherited from class org.apache.hadoop.conf.Configuration

addDefaultResource, addDeprecation, addDeprecation, addDeprecation, addDeprecation, addDeprecations, addResource, addResource, addResource, addResource, addResource, addResource, clear, 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, getRange, getRaw, getResource, getSocketAddr, getSocketAddr, getStringCollection, getStrings, getStrings, getTimeDuration, getTrimmed, getTrimmed, getTrimmedStringCollection, getTrimmedStrings, getValByRegex, hasWarnedDeprecation, isDeprecated, iterator, main, readFields, reloadConfiguration, set, set, setBoolean, setBooleanIfUnset, setClass, setClassLoader, setDeprecatedProperties, setDouble, setEnum, setFloat, setIfUnset, setInt, setLong, setPattern, setQuietMode, setSocketAddr, setStrings, setTimeDuration, size, toString, unset, updateConnectAddr, updateConnectAddr, write, writeXml, writeXml

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

CONFIGURATION_SUBSTITUTE_DEPTH

public static final String CONFIGURATION_SUBSTITUTE_DEPTH

See Also:

Constant Field Values

initalized

protected static volatile boolean initalized

Constructor Detail

XConfiguration

public XConfiguration()

Create an empty configuration.

Default values are not loaded.

XConfiguration

public XConfiguration(InputStream is)
               throws IOException

Create a configuration from an InputStream.

Code canibalized from Configuration.loadResource().

Parameters:

is - inputstream to read the configuration from.

Throws:

IOException - thrown if the configuration could not be read.

XConfiguration

public XConfiguration(Reader reader)
               throws IOException

Create a configuration from an Reader.

Code canibalized from Configuration.loadResource().

Parameters:

reader - reader to read the configuration from.

Throws:

IOException - thrown if the configuration could not be read.

XConfiguration

public XConfiguration(Properties props)

Create an configuration from a Properties instance.

Parameters:

props - Properties instance to get all properties from.

Method Detail

toProperties

public Properties toProperties()

Return a Properties instance with the configuration properties.

Returns:

a Properties instance with the configuration properties.

get

public String get(String name)

Get the value of the name property, null if no such property exists. Values are processed for variable expansion before being returned.

Overrides:

get in class org.apache.hadoop.conf.Configuration

Parameters:

name - the property name.

Returns:

the value of the name property, or null if no such property exists.

get

public String get(String name,
                  String defaultValue)

Get the value of the name property. If no such property exists, then defaultValue is returned.

Overrides:

get in class org.apache.hadoop.conf.Configuration

Parameters:

name - property name.

defaultValue - default value.

Returns:

property value, or defaultValue if the property doesn't exist.

getClassByName

public Class<?> getClassByName(String name)
                        throws ClassNotFoundException

This is a stop gap fix for HADOOP-4416.

Overrides:

getClassByName in class org.apache.hadoop.conf.Configuration

Throws:

ClassNotFoundException

copy

public static void copy(org.apache.hadoop.conf.Configuration source,
                        org.apache.hadoop.conf.Configuration target)

Copy configuration key/value pairs from one configuration to another if a property exists in the target, it gets replaced.

Parameters:

source - source configuration.

target - target configuration.

injectDefaults

public static void injectDefaults(org.apache.hadoop.conf.Configuration source,
                                  org.apache.hadoop.conf.Configuration target)

Injects configuration key/value pairs from one configuration to another if the key does not exist in the target configuration.

Parameters:

source - source configuration.

target - target configuration.

trim

public XConfiguration trim()

Returns a new XConfiguration with all values trimmed.

Returns:

a new XConfiguration with all values trimmed.

resolve

public XConfiguration resolve()

Returns a new XConfiguration instance with all inline values resolved.

Returns:

a new XConfiguration instance with all inline values resolved.

toXmlString

public String toXmlString()

Return a string with the configuration in XML format.

Returns:

a string with the configuration in XML format.

toXmlString

public String toXmlString(boolean prolog)

getTrimmedStrings

public String[] getTrimmedStrings(String name)

Get the comma delimited values of the name property as an array of trimmed Strings. If no such property is specified then null is returned.

Overrides:

getTrimmedStrings in class org.apache.hadoop.conf.Configuration

Parameters:

name - property name.

Returns:

property value as an array of trimmed Strings, or null.