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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.client; |
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|
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.componentmanager.*; |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.util.*; |
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import java.io.*; |
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|
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/** |
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* Provides a feed to the webpage system. |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: WebFeeder.java,v 1.3 2001/03/08 21:22:28 tdb1 Exp $ |
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*/ |
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public class WebFeeder { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
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public static final String REVISION = "$Revision: 1.3 $"; |
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|
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//---STATIC METHODS--- |
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|
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/** |
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* Return a reference to the single class. |
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* Construct it if it does not already exist, otherwise just return the reference. |
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*/ |
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public static WebFeeder getInstance() { |
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if (_instance == null){ |
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_instance = new WebFeeder(); |
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} |
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return _instance; |
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} |
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|
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//---CONSTRUCTORS--- |
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|
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private WebFeeder() { |
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// do something, or nothing.. but must be private |
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} |
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|
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//---PUBLIC METHODS--- |
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|
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// TO BE COMPLETED |
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// The following two methods should process and save |
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// XMLPackets and Alerts, in a directory structure that |
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// has been defined by the web page designer. |
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|
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// There may also be need to have a Thread to grab any |
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// required config (groups, "nice names, etc) and dump |
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// that to a file. |
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|
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public void receiveXMLPacket(XMLPacket packet) { |
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String packetType = packet.getParam("packet.attributes.type"); |
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if(packetType == null || !packetType.equals("data")) { |
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// bail out, without warning |
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// this is probably a heartbeat or similar |
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return; |
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} |
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// get config proxy |
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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// get file locations |
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String rootPath, latestSubDir, latestFileName; |
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try { |
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rootPath = cp.getProperty("WebFeeder", "WebFeeder.rootPath"); |
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latestSubDir = cp.getProperty("WebFeeder", "WebFeeder.latestSubDir"); |
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latestFileName = cp.getProperty("WebFeeder", "WebFeeder.latestFileName"); |
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} catch (PropertyNotFoundException e) { |
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_logger.write(this.toString(), Logger.ERROR, "Failed to get config for Latest Data: "+e); |
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// bail out |
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return; |
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} |
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// get raw data |
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String data = packet.printAll(); |
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String hostname = packet.getParam("packet.attributes.machine_name"); |
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// set paths |
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String destDir = rootPath+"/"+latestSubDir+"/"+hostname; |
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String destFile = destDir+"/"+latestFileName; |
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// try to create directory |
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File outDir = new File(destDir); |
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if(!outDir.exists()) { |
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if(!outDir.mkdirs()) { |
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// didn't exist, and we couldn't make it |
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_logger.write(this.toString(), Logger.ERROR, "Failed to create directory: "+outDir.getPath()); |
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// bail out |
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return; |
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} |
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} |
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// directory has been made, check file exists |
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File outFile = new File(destFile); |
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if(!outFile.exists()) { |
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try { |
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outFile.createNewFile(); |
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} catch (IOException e) { |
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_logger.write(this.toString(), Logger.ERROR, "Failed to create file: "+e); |
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// bail out |
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return; |
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} |
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} |
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// file should now exist |
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if(outFile.canWrite()) { |
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PrintWriter out; |
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try { |
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out = new PrintWriter(new FileWriter(outFile)); |
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out.println(data); |
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out.close(); |
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} catch (IOException e) { |
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_logger.write(this.toString(), Logger.ERROR, "Failed to write file: "+e); |
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} |
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} |
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else { |
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_logger.write(this.toString(), Logger.ERROR, "File not writeable: "+outFile.getPath()); |
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} |
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} |
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|
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public void receiveAlert(Alert alert) { |
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// process and save |
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} |
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|
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.ac.ukc.iscream.util.FormatName class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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*/ |
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public String toString() { |
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return FormatName.getName( |
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_name, |
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getClass().getName(), |
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REVISION); |
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} |
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|
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//---PRIVATE METHODS--- |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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//---ATTRIBUTES--- |
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|
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = ClientMain.NAME; |
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|
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/** |
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* This holds a reference to the |
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* system logger that is being used. |
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*/ |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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|
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//---STATIC ATTRIBUTES--- |
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|
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/** |
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* A reference to the single instance of this class |
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*/ |
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private static WebFeeder _instance; |
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|
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} |
