summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--doc/lib/rrdFile_js.html357
1 files changed, 357 insertions, 0 deletions
diff --git a/doc/lib/rrdFile_js.html b/doc/lib/rrdFile_js.html
new file mode 100644
index 0000000..90b37d4
--- /dev/null
+++ b/doc/lib/rrdFile_js.html
@@ -0,0 +1,357 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<HTML>
+<HEAD>
+ <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8">
+ <TITLE>rrdFile module</TITLE>
+ <META NAME="GENERATOR" CONTENT="OpenOffice.org 3.0 (Linux)">
+ <META NAME="CREATED" CONTENT="20090209;18445600">
+ <META NAME="CHANGED" CONTENT="20090209;19214700">
+ <META NAME="Info 1" CONTENT="">
+ <META NAME="Info 2" CONTENT="">
+ <META NAME="Info 3" CONTENT="">
+ <META NAME="Info 4" CONTENT="">
+ <STYLE TYPE="text/css">
+ <!--
+ @page { margin: 0.79in }
+ TD P { margin-bottom: 0.08in }
+ H1 { margin-bottom: 0.08in }
+ H1.western { font-family: "Liberation Sans", sans-serif; font-size: 22pt }
+ P { margin-bottom: 0.08in }
+ H2.heading-2-western { font-family: "Liberation Serif", serif; font-size: 16pt }
+ TH P { margin-bottom: 0.08in }
+ A:link { so-language: zxx }
+ -->
+ </STYLE>
+</HEAD>
+<BODY LANG="en-US" DIR="LTR">
+<H1 CLASS="western">rrdFile module</H1>
+<TABLE WIDTH=50% CELLPADDING=2 CELLSPACING=2>
+ <TR>
+ <TD>
+ <HR>
+ <P>The <A HREF="../../src/lib/rrdFile.js">rrdFile Javascript
+ module</A> implements a set of classes that can be used to extract
+ information from <A HREF="http://oss.oetiker.ch/rrdtool/">RRD
+ archives</A> loaded as binary file objects.</P>
+ <HR>
+ </TD>
+ </TR>
+</TABLE>
+<H2 CLASS="heading-2-western">Overview</H2>
+<P>The main class in this module is <A HREF="#RRDFile">RRDFile</A>.
+It interprets the given the binary file object and provides methods
+to decode the <A HREF="http://oss.oetiker.ch/rrdtool/">RRD</A>
+information.</P>
+<H2 CLASS="heading-2-western"><A NAME="RRDFile"></A>Class RRDFile</H2>
+<P>This is the main class of the package. It is also the only class
+the user ever needs to explicitly instantiate.</P>
+<P>The RRDFile constructor has a single argument:</P>
+<UL>
+ <LI><P>A binary file object.</P>
+ <P>Any object implementing an interface providing the following
+ methods can be used:</P>
+ <UL>
+ <LI><P>getByteAt(idx) - Return a 8 bit unsigned integer at offset
+ idx.</P>
+ <LI><P>getLongAt(idx) - Return a 32 bit unsigned integer at offset
+ idx.</P>
+ <LI><P>getDoubleAt(idx) - Return a double float at offset idx.</P>
+ <LI><P>getFastDoubleAt(idx) - Similar to getDoubleAt but with less
+ precision.</P>
+ <LI><P>getCStringAt(idx,maxsize) - Return a string of at most
+ maxsize characters that was 0-terminated in the source.</P>
+ </UL>
+ <P>The <A HREF="binaryXHR_js.html">binaryXHR module</A>, provided
+ with this package, provides the class <A HREF="binaryXHR_js.html#BinaryFile">BinaryFile</A>
+ that implements this interface.</P>
+</UL>
+<P>If the binary file is not a proper <A HREF="http://oss.oetiker.ch/rrdtool/">RRD
+file</A>, an <A HREF="#InvalidRRD">InvalidRRD</A> exception will be
+thrown.</P>
+<P>This class also implements the following methods:</P>
+<DIV ALIGN=RIGHT>
+ <TABLE WIDTH=90% BORDER=1 CELLPADDING=2 CELLSPACING=3>
+ <COL WIDTH=51*>
+ <COL WIDTH=205*>
+ <THEAD>
+ <TR VALIGN=TOP>
+ <TH WIDTH=20%>
+ <P ALIGN=LEFT>Method</P>
+ </TH>
+ <TH WIDTH=80%>
+ <P ALIGN=LEFT>Description</P>
+ </TH>
+ </TR>
+ </THEAD>
+ <TBODY>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getMinStep()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the base <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#I__step__s_step__default__300_seconds_">interval
+ in seconds</A> that was used to feed the RRD file.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getLastUpdate()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the timestamp of the <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdlastupdate.en.html">last
+ update</A>.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getNrDSs()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the number of <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IDS_ds_name_DST_dst_arguments">Data
+ Sources</A> present in the RRD file.
+ </P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getDS(n)</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return an object of type <A HREF="#RRDDS">RRDDS</A> holding
+ the information about the n-th <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IDS_ds_name_DST_dst_arguments">Data
+ Source</A>.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getNrRRAs()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the number of <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IRRA_CF_cf_arguments">Round
+ Robin Archives</A> present in the RRD file.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getRRAInfo(n)</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return an object of type <A HREF="#RRDRRAInfo">RRDRRAInfo</A>
+ holding the information about the n-th <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IRRA_CF_cf_arguments">Round
+ Robin Archive</A>.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getRRA(n)</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return an object of type <A HREF="#RRDRRA">RRDRRA</A> that
+ can be used to access the values stored in the n-th <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IRRA_CF_cf_arguments">Round
+ Robin Archive</A>.</P>
+ </TD>
+ </TR>
+ </TBODY>
+ </TABLE>
+</DIV>
+<H2 CLASS="heading-2-western"><A NAME="RRDDS"></A>Class RRDDS</H2>
+<P>This class implements the methods needed to access the information
+about a <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IDS_ds_name_DST_dst_arguments">RRD
+Data Source</A>.</P>
+<DIV ALIGN=RIGHT>
+ <TABLE WIDTH=90% BORDER=1 CELLPADDING=2 CELLSPACING=3>
+ <COL WIDTH=51*>
+ <COL WIDTH=205*>
+ <THEAD>
+ <TR VALIGN=TOP>
+ <TH WIDTH=20%>
+ <P ALIGN=LEFT>Method</P>
+ </TH>
+ <TH WIDTH=80%>
+ <P ALIGN=LEFT>Description</P>
+ </TH>
+ </TR>
+ </THEAD>
+ <TBODY>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getName()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the name of the data source.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getType()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IDS_ds_name_DST_dst_arguments">type</A>
+ of the data source.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getMin()</P>
+ </TD>
+ <TD ROWSPAN=2 WIDTH=80%>
+ <P>Return the minimum and maximum value the data source can
+ contain.
+ </P>
+ <P>If either is not defined, <I>undefined</I> is returned.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getMax()</P>
+ </TD>
+ </TR>
+ </TBODY>
+ </TABLE>
+</DIV>
+<H2 CLASS="heading-2-western"><A NAME="RRDRRAInfo"></A>Class
+RRDRRAInfo</H2>
+<P>This class implements the methods needed to access the information
+about a <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IRRA_CF_cf_arguments">Round
+Robin Archive</A>.</P>
+<DIV ALIGN=RIGHT>
+ <TABLE WIDTH=90% BORDER=1 CELLPADDING=2 CELLSPACING=3>
+ <COL WIDTH=52*>
+ <COL WIDTH=204*>
+ <THEAD>
+ <TR VALIGN=TOP>
+ <TH WIDTH=20%>
+ <P ALIGN=LEFT>Method</P>
+ </TH>
+ <TH WIDTH=80%>
+ <P ALIGN=LEFT>Description</P>
+ </TH>
+ </TR>
+ </THEAD>
+ <TBODY>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getNrRows()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the number of rows in the RRA.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getStep()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the number of seconds between rows.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getCFName()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IRRA_CF_cf_arguments">Consolidation
+ Function</A> used by the RRA.</P>
+ </TD>
+ </TR>
+ </TBODY>
+ </TABLE>
+</DIV>
+<H2 CLASS="heading-2-western"><A NAME="RRDRRA"></A>Class RRDRRA</H2>
+<P>This class implements the methods needed to access the content of
+a <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IRRA_CF_cf_arguments">Round
+Robin Archive</A>.</P>
+<DIV ALIGN=RIGHT>
+ <TABLE WIDTH=90% BORDER=1 CELLPADDING=2 CELLSPACING=3>
+ <COL WIDTH=52*>
+ <COL WIDTH=204*>
+ <THEAD>
+ <TR VALIGN=TOP>
+ <TH WIDTH=20%>
+ <P ALIGN=LEFT>Method</P>
+ </TH>
+ <TH WIDTH=80%>
+ <P ALIGN=LEFT>Description</P>
+ </TH>
+ </TR>
+ </THEAD>
+ <TBODY>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getCFName()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IRRA_CF_cf_arguments">Consolidation
+ Function</A> used by the RRA.</P>
+ <P>The current implementation only supports
+ AVERAGE,MAXIMUM,MINIMUM and LAST.<BR>Access to elements of any
+ other CF is currently undefined.
+ </P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getNrRows()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the number of rows in the RRA.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getNrDSs()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the number of <A HREF="http://oss.oetiker.ch/rrdtool/doc/rrdcreate.en.html#IDS_ds_name_DST_dst_arguments">Data
+ Sources</A> present in the RRA.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getStep()</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the number of seconds between rows.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getEl(r,d)</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the value for the d-th DS in the r-th row.</P>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP>
+ <TD WIDTH=20%>
+ <P>getElFast(row,ds)</P>
+ </TD>
+ <TD WIDTH=80%>
+ <P>Return the low-precision value for the d-th DS in the r-th
+ row.</P>
+ </TD>
+ </TR>
+ </TBODY>
+ </TABLE>
+</DIV>
+<H2 CLASS="heading-2-western"><A NAME="InvalidRRD"></A>Exception
+class InvalidRRD</H2>
+<P>This is a helper exception class that can be thrown while
+interpreting the binary file object.</P>
+<P><BR><BR>
+</P>
+<TABLE WIDTH=50% CELLPADDING=2 CELLSPACING=2>
+ <TR>
+ <TD>
+ <HR>
+ <P>This module is part of the <A HREF="http://javascript.sourceforge.net/">javascriptRRD
+ package</A> hosted at <A HREF="http://javascript.sourceforge.net/">http://javascript.sourceforge.net</A>.
+ <BR>It is licensed under the <A HREF="http://www.opensource.org/licenses/mit-license.php">MIT
+ licanse</A>.
+ </P>
+ <HR>
+ </TD>
+ </TR>
+</TABLE>
+</BODY>
+</HTML>
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-20 05:53:57 +0000