Package org.rrd4j.core.jrrd

This package provides read-only access to natives RRD file.

See: Description

Interface Summary

Interface	Description
Constants

Class Summary

Class	Description
Archive	Instances of this class model an archive section of an RRD file.
CDPStatusBlock	Instances of this class model the consolidation data point status from an RRD file.
DataChunk	Models a chunk of result data from an RRDatabase.
DataSource	Instances of this class model a data source in an RRD file.
Header	Instances of this class model the header section of an RRD file.
PDPStatusBlock	Instances of this class model the primary data point status from an RRD file.
RRDatabase	Instances of this class model Round Robin Database (RRD) files.
RRDFile	This class is used read information from an RRD file.
UnivalArray	This class is used to read a unival from a file unival is a rrdtool type, defined in rrd_format.h

Enum Summary

Enum	Description
ConsolidationFunctionType	Class ConsolidationFunctionType
DataSourceType	Class DataSourceType

Package org.rrd4j.core.jrrd Description

This package provides read-only access to natives RRD file. Currently this can read RRD files that were generated big or little endian machines, 32 or 64 bits word, and 4 or 8 bytes alignment. So it's know to work on a least

• x86 Linux
• x86_64 Linux
• x86_64 Solaris
• sparc v8 (32 bits) Solaris
• sparc v9 (64 bits) Solaris

But it should work on other environments too.

Typical usage:

 RRDatabase db = new RRDatabase("native.rrd");
 RrdGraphDef() gd = RrdGraphDef();
 Calendar endCal = Calendar.getInstance();
 endCal.set(Calendar.MILLISECOND, 0);
 Calendar startCal = (Calendar) endCal.clone();
 startCal.add(Calendar.DATE, -1);
 DataChunk chunk = db.getData(ConsolidationFunctionType.AVERAGE, startCal.getTime(), endCal.getTime(), 1L);
 for(String name: db.getDataSourcesName()) {
     gd.datasource(name, chunk.toPlottable(name));
 }
 

Version:

$Revision: 1.1 $