public void archive(Datasource Datasource, double value, long numUpdates)
{
int dsIndex = getDsIndex(Datasource.DsName);
foreach (Archive archive in archives)
{
archive.archive(dsIndex, value, numUpdates);
}
}
/**
* <p>Returns string representing complete internal RRD state. The returned
* string can be printed to <code>stdout</code> and/or used for debugging purposes.</p>
*
* @return String representing internal RRD state.
* @Thrown in case of I/O related error.
*/
public String dump()
{
lock (sync)
{
StringBuilder buffer = new StringBuilder();
buffer.Append(header.dump());
foreach (Datasource Datasource in Datasources)
{
buffer.Append(Datasource.dump());
}
foreach (Archive archive in archives)
{
buffer.Append(archive.dump());
}
return(buffer.ToString());
}
}
public void copyStateTo(RrdUpdater other)
{
if (!(other.GetType() == typeof(Datasource)))
{
throw new ArgumentException(
"Cannot copy Datasource object to " + other.GetType().ToString());
}
Datasource datasource = (Datasource)other;
if (datasource.dsName.get().CompareTo(dsName.get()) != 0)
{
throw new ArgumentException("Incompatible datasource names");
}
if (datasource.DsType.Name.CompareTo(dsType.Name) != 0)
{
throw new ArgumentException("Incompatible datasource types");
}
datasource.lastValue.set(lastValue.get());
datasource.nanSeconds.set(nanSeconds.get());
datasource.accumValue.set(accumValue.get());
}
/**
* Constructor used to open already existing RRD backed
* with a storage (backend) different from default. Constructor
* obtains read or read/write access to this RRD.
*
* @param path Path to existing RRD.
* @param readOnly Should be set to <code>false</code> if you want to update
* the underlying RRD. If you want just to fetch data from the RRD file
* (read-only access), specify <code>true</code>. If you try to update RRD file
* open in read-only mode (<code>readOnly</code> set to <code>true</code>),
* <code>IOException</code> will be thrown.
* @param factory Backend factory which will be used for this RRD.
* @throws FileNotFoundException Thrown if the requested file does not exist.
* @ Thrown in case of general I/O error (bad RRD file, for example).
* @see RrdBackendFactory
*/
public RrdDb(String path, bool readOnly, RrdBackendFactory factory)
{
if (!factory.exists(path))
{
throw new System.IO.FileNotFoundException("Could not open " + path + " [non existent]");
}
backend = factory.open(path, readOnly);
try
{
// restore header
header = new Header(this, (RrdDef)null);
if (factory.shouldValidateHeader(path))
{
header.validateHeader();
}
// restore Datasources
int dsCount = header.getDsCount();
Datasources = new Datasource[dsCount];
for (int i = 0; i < dsCount; i++)
{
Datasources[i] = new Datasource(this, null);
}
// restore archives
int arcCount = header.getArcCount();
archives = new Archive[arcCount];
for (int i = 0; i < arcCount; i++)
{
archives[i] = new Archive(this, null);
}
}
catch (IOException e)
{
backend.close();
log.ErrorFormat("RrdDb ctor failed on:{0} [{1]}", path, e.Message);
throw e;
}
}
/**
* Constructor used to create new RRD object from the definition object but with a storage
* (backend) different from default.
*
* <p>Rrd4n uses <i>factories</i> to create RRD backend objecs. There are three different
* backend factories supplied with Rrd4n, and each factory has its unique name:</p>
* <p/>
* <ul>
* <li><b>FILE</b>: backends created from this factory will store RRD data to files by using
* java.io.* classes and methods
* <li><b>NIO</b>: backends created from this factory will store RRD data to files by using
* java.nio.* classes and methods
* <li><b>MEMORY</b>: backends created from this factory will store RRD data in memory. This might
* be useful in runtime environments which prohibit disk utilization, or for storing temporary,
* non-critical data (it gets lost as soon as JVM exits).
* </ul>
* <p/>
* <p>For example, to create RRD in memory, use the following code</p>
* <pre>
* RrdBackendFactory factory = RrdBackendFactory.getFactory("MEMORY");
* RrdDb rrdDb = new RrdDb(rrdDef, factory);
* rrdDb.close();
* </pre>
* <p/>
* <p>New RRD file structure is specified with an object of class
* {@link RrdDef <b>RrdDef</b>}. The underlying RRD storage is created as soon
* as the constructor returns.</p>
*
* @param rrdDef RRD definition object
* @param factory The factory which will be used to create storage for this RRD
* @Thrown in case of I/O error
* @see RrdBackendFactory
*/
public RrdDb(RrdDef rrdDef, RrdBackendFactory factory)
{
if (!rrdDef.hasDatasources())
{
throw new ArgumentException("No RRD Datasource specified. At least one is needed.");
}
if (!rrdDef.hasArchives())
{
throw new ArgumentException("No RRD archive specified. At least one is needed.");
}
String path = rrdDef.getPath();
backend = factory.open(path, false);
try
{
backend.setLength(rrdDef.getEstimatedSize());
// create header
header = new Header(this, rrdDef);
// create Datasources
DsDef[] dsDefs = rrdDef.getDsDefs();
Datasources = new Datasource[dsDefs.Length];
for (int i = 0; i < dsDefs.Length; i++)
{
Datasources[i] = new Datasource(this, dsDefs[i]);
}
// create archives
ArcDef[] arcDefs = rrdDef.getArcDefs();
archives = new Archive[arcDefs.Length];
for (int i = 0; i < arcDefs.Length; i++)
{
archives[i] = new Archive(this, arcDefs[i]);
}
}
catch (IOException e)
{
backend.close();
throw;
}
}
/**
* <p>Writes the RRD content to OutputStream using XML format. This format
* is fully compatible with RRDTool's XML dump format and can be used for conversion
* purposes or debugging.</p>
*
* @param destination Output stream to receive XML data
* @Thrown in case of I/O related error
*/
public void dumpXml(StreamWriter destination)
{
XmlWriter writer = XmlWriter.Create(destination);
writer.WriteStartDocument();
writer.WriteStartElement("rrd");
// dump header
header.appendXml(writer);
// dump Datasources
foreach (Datasource Datasource in Datasources)
{
Datasource.appendXml(writer);
}
// dump archives
foreach (Archive archive in archives)
{
archive.appendXml(writer);
}
writer.WriteEndElement();
writer.WriteEndDocument();
writer.Flush();
}
public void archive(Datasource Datasource, double value, long numUpdates)
{
int dsIndex = getDsIndex(Datasource.DsName);
foreach (Archive archive in archives)
{
archive.archive(dsIndex, value, numUpdates);
}
}
/**
* Constructor used to open already existing RRD backed
* with a storage (backend) different from default. Constructor
* obtains read or read/write access to this RRD.
*
* @param path Path to existing RRD.
* @param readOnly Should be set to <code>false</code> if you want to update
* the underlying RRD. If you want just to fetch data from the RRD file
* (read-only access), specify <code>true</code>. If you try to update RRD file
* open in read-only mode (<code>readOnly</code> set to <code>true</code>),
* <code>IOException</code> will be thrown.
* @param factory Backend factory which will be used for this RRD.
* @throws FileNotFoundException Thrown if the requested file does not exist.
* @ Thrown in case of general I/O error (bad RRD file, for example).
* @see RrdBackendFactory
*/
public RrdDb(String path, bool readOnly, RrdBackendFactory factory)
{
if (!factory.exists(path)) throw new System.IO.FileNotFoundException("Could not open " + path + " [non existent]");
backend = factory.open(path, readOnly);
try
{
// restore header
header = new Header(this, (RrdDef)null);
if (factory.shouldValidateHeader(path))
{
header.validateHeader();
}
// restore Datasources
int dsCount = header.getDsCount();
Datasources = new Datasource[dsCount];
for (int i = 0; i < dsCount; i++)
{
Datasources[i] = new Datasource(this, null);
}
// restore archives
int arcCount = header.getArcCount();
archives = new Archive[arcCount];
for (int i = 0; i < arcCount; i++)
{
archives[i] = new Archive(this, null);
}
}
catch (IOException e)
{
backend.close();
log.ErrorFormat("RrdDb ctor failed on:{0} [{1]}", path, e.Message);
throw e;
}
}
/**
* Constructor used to create new RRD object from the definition object but with a storage
* (backend) different from default.
*
* <p>Rrd4n uses <i>factories</i> to create RRD backend objecs. There are three different
* backend factories supplied with Rrd4n, and each factory has its unique name:</p>
* <p/>
* <ul>
* <li><b>FILE</b>: backends created from this factory will store RRD data to files by using
* java.io.* classes and methods
* <li><b>NIO</b>: backends created from this factory will store RRD data to files by using
* java.nio.* classes and methods
* <li><b>MEMORY</b>: backends created from this factory will store RRD data in memory. This might
* be useful in runtime environments which prohibit disk utilization, or for storing temporary,
* non-critical data (it gets lost as soon as JVM exits).
* </ul>
* <p/>
* <p>For example, to create RRD in memory, use the following code</p>
* <pre>
* RrdBackendFactory factory = RrdBackendFactory.getFactory("MEMORY");
* RrdDb rrdDb = new RrdDb(rrdDef, factory);
* rrdDb.close();
* </pre>
* <p/>
* <p>New RRD file structure is specified with an object of class
* {@link RrdDef <b>RrdDef</b>}. The underlying RRD storage is created as soon
* as the constructor returns.</p>
*
* @param rrdDef RRD definition object
* @param factory The factory which will be used to create storage for this RRD
* @Thrown in case of I/O error
* @see RrdBackendFactory
*/
public RrdDb(RrdDef rrdDef, RrdBackendFactory factory)
{
if (!rrdDef.hasDatasources())
{
throw new ArgumentException("No RRD Datasource specified. At least one is needed.");
}
if (!rrdDef.hasArchives())
{
throw new ArgumentException("No RRD archive specified. At least one is needed.");
}
String path = rrdDef.getPath();
backend = factory.open(path, false);
try
{
backend.setLength(rrdDef.getEstimatedSize());
// create header
header = new Header(this, rrdDef);
// create Datasources
DsDef[] dsDefs = rrdDef.getDsDefs();
Datasources = new Datasource[dsDefs.Length];
for (int i = 0; i < dsDefs.Length; i++)
{
Datasources[i] = new Datasource(this, dsDefs[i]);
}
// create archives
ArcDef[] arcDefs = rrdDef.getArcDefs();
archives = new Archive[arcDefs.Length];
for (int i = 0; i < arcDefs.Length; i++)
{
archives[i] = new Archive(this, arcDefs[i]);
}
}
catch (IOException e)
{
backend.close();
throw;
}
}
