com.splicemachine.access

Class HBaseConfigurationSource

java.lang.Object

com.splicemachine.access.HBaseConfigurationSource

All Implemented Interfaces:

ConfigurationSource

public class HBaseConfigurationSource
extends java.lang.Object
implements ConfigurationSource

An instance of ConfigurationSource that wraps Configuration.

See Also:

unwrapDelegate()

Constructor Summary

Constructors

Constructor and Description
HBaseConfigurationSource(org.apache.hadoop.conf.Configuration delegate)

Method Summary

Modifier and Type	Method and Description
boolean	getBoolean(java.lang.String key, boolean deflt) Get the value from this configuration source set by the given key or deflt if no value exists for that key.
double	getDouble(java.lang.String key, double deflt) Get the value from this configuration source set by the given key or deflt if no value exists for that key.
int	getInt(java.lang.String key, int deflt) Get the value from this configuration source set by the given key or deflt if no value exists for that key.
long	getLong(java.lang.String key, long deflt) Get the value from this configuration source set by the given key or deflt if no value exists for that key.
java.lang.String	getString(java.lang.String key, java.lang.String deflt) Get the value from this configuration source set by the given key or deflt if no value exists for that key.
java.util.Map<java.lang.String,java.lang.String>	prefixMatch(java.lang.String prefix) Get the mapping of property key to (toString()) value for configuration properties that start with the given prefix. If null is passed as an argument, all properties are returned.
org.apache.hadoop.conf.Configuration	unwrapDelegate() Since everything under us, HBase, Spark, Hadoop, etc., uses Configuration, we must expose a way to get the configured delegate.

Methods inherited from class java.lang.Object

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

Constructor Detail

HBaseConfigurationSource

public HBaseConfigurationSource(org.apache.hadoop.conf.Configuration delegate)

Method Detail

getInt

public int getInt(java.lang.String key,
                  int deflt)

Description copied from interface: ConfigurationSource

Get the value from this configuration source set by the given key or deflt if no value exists for that key.

Specified by:

getInt in interface ConfigurationSource

Parameters:

key - the property key

deflt - the default value to return if no value exists for the given key

Returns:

the value that was set or the default value if no value exists yet

getLong

public long getLong(java.lang.String key,
                    long deflt)

Description copied from interface: ConfigurationSource

Get the value from this configuration source set by the given key or deflt if no value exists for that key.

Specified by:

getLong in interface ConfigurationSource

Parameters:

key - the property key

deflt - the default value to return if no value exists for the given key

Returns:

the value that was set or the default value if no value exists yet

getBoolean

public boolean getBoolean(java.lang.String key,
                          boolean deflt)

Description copied from interface: ConfigurationSource

Get the value from this configuration source set by the given key or deflt if no value exists for that key.

Specified by:

getBoolean in interface ConfigurationSource

Parameters:

key - the property key

deflt - the default value to return if no value exists for the given key

Returns:

the value that was set or the default value if no value exists yet

getString

public java.lang.String getString(java.lang.String key,
                                  java.lang.String deflt)

Description copied from interface: ConfigurationSource

Get the value from this configuration source set by the given key or deflt if no value exists for that key.

Specified by:

getString in interface ConfigurationSource

Parameters:

key - the property key

deflt - the default value to return if no value exists for the given key

Returns:

the value that was set or the default value if no value exists yet

getDouble

public double getDouble(java.lang.String key,
                        double deflt)

Description copied from interface: ConfigurationSource

Get the value from this configuration source set by the given key or deflt if no value exists for that key.

Specified by:

getDouble in interface ConfigurationSource

Parameters:

key - the property key

deflt - the default value to return if no value exists for the given key

Returns:

the value that was set or the default value if no value exists yet

prefixMatch

public java.util.Map<java.lang.String,java.lang.String> prefixMatch(java.lang.String prefix)

Description copied from interface: ConfigurationSource

Get the mapping of property key to (toString()) value for configuration properties that start with the given prefix.
If null is passed as an argument, all properties are returned.

To get all splice DDL properties, for example:

     Map props = config.prefixMatch("splice.ddl*");
 

Specified by:

prefixMatch in interface ConfigurationSource

Parameters:

prefix - the property's starting key

Returns:

all property key/value pairs for keys that start with prefix.

unwrapDelegate

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

Since everything under us, HBase, Spark, Hadoop, etc., uses Configuration, we must expose a way to get the configured delegate.

This method is not exposed in the interface, of course, because it would create a compile-time dependency on Configuration. Given that, it's a little convoluted to call this method. It's assumed that callers have access to this method can also support a compile-time dependency on the hadoop configuration.

Example:

  Configuration config = ((HBaseConfigurationSource)HConfiguration.getConfigSource()).unwrapDelegate()
 

Specified by:

unwrapDelegate in interface ConfigurationSource

Returns:

the underlying hadoop configuration.