Package org.voltdb.stream.execution

Class GlobalConfigurationContext

java.lang.Object

org.voltdb.stream.execution.GlobalConfigurationContext

All Implemented Interfaces:

ExecutionContext.ConfigurationContext, Configuration

public class GlobalConfigurationContext
extends Object
implements ExecutionContext.ConfigurationContext

Nested Class Summary

Nested classes/interfaces inherited from interface org.voltdb.stream.execution.Configuration

Configuration.ConfigurationPart

Method Summary

Modifier and Type	Method	Description
<RESULT> RESULT	configureOnce(String identifier, Supplier<RESULT> task)
Configuration.ConfigurationPart	findByPath(String required, String... optional)	This method obtains a value through a name or path to property from a yaml configuration.
static ExecutionContext.ConfigurationContext	getContext()

Methods inherited from class java.lang.Object

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

Method Details

getContext

public static ExecutionContext.ConfigurationContext getContext()

findByPath

public Configuration.ConfigurationPart findByPath(String required,
 String... optional)

Description copied from interface: Configuration

This method obtains a value through a name or path to property from a yaml configuration. For example consider such app.yaml

 data:
   items:
     - item1
     - item2
   work:
     count: 1
     people:
       person:
         name: bob
 

call findByPath("data") to get ConfigurationPart representing map {items: [..], work: {..}} call findByPath("data", "items") to get items as list [item1, item2] call findByPath("data", "work", "count") to get items as integer (1) call findByPath("data.work", "count") to get items as integer (1) call findByPath("data.work.people.person") to get items as map {name: bob} call findByPath("big.unknown") returns empty ConfigurationPart

Specified by:

findByPath in interface Configuration

Parameters:

required - to access a value

optional - to access a value

Returns:

ConfigurationPart representing the value

configureOnce

public <RESULT> RESULT configureOnce(String identifier,
 Supplier<RESULT> task)

Specified by:

configureOnce in interface ExecutionContext.ConfigurationContext

Type Parameters:

RESULT - of the task

Parameters:

identifier - of configurator

task - to execute for the identifier

Returns:

result of the task