com.caplin.charting

Class ChartingProvider

java.lang.Object

com.caplin.charting.ChartingProvider

public class ChartingProvider
extends java.lang.Object

The ChartingProvider provides an integration point to allow you to plug in a provider of historic chart data.

It should be instantiated like so:

 DataSource dataSource = new DataSource(commandLineArgs);
 ChartDataProvider dataProvider = new YourClassImplementingChartDataProviderGoesHere();
 ChartingProvider chartingProvider = new ChartingProvider(dataSource, dataProvider);
 dataSource.start();
 

The subject prefix that this provider listens for is specified by the chart-objectname-prefix configuration variable inside the datasource.conf file:

 Example:
 
 chart-objectname-prefix /CHARTS/
 
 

the default chart-objectname-prefix value is /CHARTS/

Subjects of the following form are parsed:

 
 /CHARTS/Subject?interval=1d&start=1308327222&end=1308327222&cached=true
  
  where
  
 /CHARTS/Subject        is the subject (with the /CHARTS/ default prefix)
    interval=1d       represents an interval of 1 day
    start=1308327222  is the start time in seconds since midnight, January 1, 1970 UTC
    end=1308327222    is the end time
    cached=true       indicates cached data
 

Constructor Summary

Constructors

Constructor and Description
ChartingProvider(DataSource dataSource, ChartDataProvider chartDataProvider) Constructs a new ChartingProvider.

Method Summary

Methods inherited from class java.lang.Object

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

Constructor Detail

ChartingProvider

public ChartingProvider(DataSource dataSource,
                ChartDataProvider chartDataProvider)

Constructs a new ChartingProvider.

Parameters:

dataSource - a caplin DataSource.

chartDataProvider - an object that provides historic chart data. This would be written to integrate with a specific service.