org.apache.oozie.service
Class ConfigurationService

java.lang.Object
  org.apache.oozie.service.ConfigurationService

All Implemented Interfaces:

Service, Instrumentable

public class ConfigurationService
extends Object
implements Service, Instrumentable

Built in service that initializes the services configuration.

The configuration loading sequence is identical to Hadoop configuration loading sequence.

Default values are loaded from the 'oozie-default.xml' file from the classpath, then site configured values are loaded from a site configuration file from the Oozie configuration directory.

The Oozie configuration directory is resolved using the OOZIE_HOME environment variable as ${OOZIE_HOME}/conf. If the OOZIE_HOME environment variable is not defined the initialization of the ConfigurationService fails.

The site configuration is loaded from the oozie-site.xml file in the configuration directory.

The site configuration file name to use can be changed by setting the OOZIE_CONFIG_FILE environment variable to an alternate file name. The alternate file must ber in the Oozie configuration directory.

Configuration properties, prefixed with 'oozie.', passed as system properties overrides default and site values.

The configuration service logs details on how the configuration was loaded as well as what properties were overrode via system properties settings.

Field Summary

static String	CONF_IGNORE_SYS_PROPS
static String	CONF_PREFIX
static String	DEFAULT_CONFIG_FILE
static String	OOZIE_CONFIG_DIR System property that indicates the configuration directory.
static String	OOZIE_CONFIG_FILE System property that indicates the name of the site configuration file to load.
static String	OOZIE_DATA_DIR System property that indicates the data directory.
static String	SITE_CONFIG_FILE

Fields inherited from interface org.apache.oozie.service.Service

DEFAULT_LOCK_TIMEOUT, lockTimeout, USE_XCOMMAND

Constructor Summary

ConfigurationService()

Method Summary

void	destroy() Destroy the configuration service.
org.apache.hadoop.conf.Configuration	getConf() Return the services configuration.
String	getConfigDir() Return Oozie configuration directory.
static String	getConfigurationDirectory()
Class<? extends Service>	getInterface() Return the public interface for configuration service.
void	init(Services services) Initialize the log service.
void	instrument(Instrumentation instr) Instruments the configuration service.
static org.apache.hadoop.conf.Configuration	maskPasswords(org.apache.hadoop.conf.Configuration conf) Return a configuration with all sensitive values masked.

Methods inherited from class java.lang.Object

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

Field Detail

CONF_PREFIX

public static final String CONF_PREFIX

See Also:

Constant Field Values

CONF_IGNORE_SYS_PROPS

public static final String CONF_IGNORE_SYS_PROPS

See Also:

Constant Field Values

OOZIE_CONFIG_DIR

public static final String OOZIE_CONFIG_DIR

System property that indicates the configuration directory.

See Also:

Constant Field Values

OOZIE_DATA_DIR

public static final String OOZIE_DATA_DIR

System property that indicates the data directory.

See Also:

Constant Field Values

OOZIE_CONFIG_FILE

public static final String OOZIE_CONFIG_FILE

System property that indicates the name of the site configuration file to load.

See Also:

Constant Field Values

DEFAULT_CONFIG_FILE

public static final String DEFAULT_CONFIG_FILE

See Also:

Constant Field Values

SITE_CONFIG_FILE

public static final String SITE_CONFIG_FILE

See Also:

Constant Field Values

Constructor Detail

ConfigurationService

public ConfigurationService()

Method Detail

init

public void init(Services services)
          throws ServiceException

Initialize the log service.

Specified by:

init in interface Service

Parameters:

services - services instance.

Throws:

ServiceException - thrown if the log service could not be initialized.

getConfigurationDirectory

public static String getConfigurationDirectory()
                                        throws ServiceException

Throws:

ServiceException

destroy

public void destroy()

Destroy the configuration service.

Specified by:

destroy in interface Service

getInterface

public Class<? extends Service> getInterface()

Return the public interface for configuration service.

Specified by:

getInterface in interface Service

Returns:

ConfigurationService.

getConf

public org.apache.hadoop.conf.Configuration getConf()

Return the services configuration.

Returns:

the services configuration.

getConfigDir

public String getConfigDir()

Return Oozie configuration directory.

Returns:

Oozie configuration directory.

instrument

public void instrument(Instrumentation instr)

Instruments the configuration service.

It sets instrumentation variables indicating the config dir and config file used.

Specified by:

instrument in interface Instrumentable

Parameters:

instr - instrumentation to use.

maskPasswords

public static org.apache.hadoop.conf.Configuration maskPasswords(org.apache.hadoop.conf.Configuration conf)

Return a configuration with all sensitive values masked.

Parameters:

conf - configuration to mask.

Returns:

masked configuration.