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//---PACKAGE DECLARATION--- |
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package uk.org.iscream.client; |
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package uk.org.iscream.cms.server.client; |
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//---IMPORTS--- |
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import uk.org.iscream.componentmanager.*; |
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import uk.org.iscream.core.*; |
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import uk.org.iscream.util.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.server.util.*; |
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import java.io.*; |
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/** |
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* Provides a feed to the webpage system. |
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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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* @author $Author$ |
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* @version $Id$ |
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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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public synchronized 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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File hostdir = contents[i]; |
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// ..and check it's a directory |
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if(hostdir.isDirectory()) { |
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// if this is set, we clean files older than it |
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long deleteFiles = -1; |
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// get all the contents of that directory |
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File[] hostdirContents = hostdir.listFiles(); |
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for(int j=0; j < hostdirContents.length; j++) { |
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long lastModified = alertFile.lastModified(); |
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long age = System.currentTimeMillis() - lastModified; |
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if(age > ((long) deleteOlderThan*1000)) { |
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// if we're on a final heartbeat, we probably want to |
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// clean up any stale alerts left behind |
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// by setting this flag, we'll clean them up on leaving this loop |
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if(filename.endsWith(".HB."+Alert.alertLevels[Alert.alertLevels.length-1])) { |
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// we do this so that delete files is set to the |
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// latest date of a HB.FINAL. There should only be |
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// one of them though :) |
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if(lastModified > deleteFiles) { |
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deleteFiles = lastModified; |
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} |
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} |
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// it's also older than our age to delete older than |
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if(!alertFile.delete()) { |
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_logger.write(this.toString(), Logger.WARNING, "Failed to delete the following 'old' alert file: "+alertFile.getPath()); |
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} |
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} |
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} |
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} |
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// cleanup stale alerts |
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if(deleteFiles >= 0) { |
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File[] remainingHostdirContents = hostdir.listFiles(); |
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for(int j=0; j < remainingHostdirContents.length; j++) { |
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File alertFile = remainingHostdirContents[j]; |
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if(alertFile.lastModified() < deleteFiles) { |
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// alert file is older than the most recent |
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// FINAL Heartbeat alert. |
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if(alertFile.delete()) { |
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// do a quick check to see if the directory is now empty |
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File[] newHostdirContents = hostdir.listFiles(); |
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if(newHostdirContents.length == 0) { |
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// it does seem to be, try and delete it |
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// this will fail anyway if files still remain |
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if(!hostdir.delete()) { |
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_logger.write(this.toString(), Logger.WARNING, "Failed to delete the following empty host directory: "+hostdir.getPath()); |
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} |
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} |
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_logger.write(this.toString(), Logger.DEBUG, "Deleted stale alert file: "+alertFile.getPath()); |
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} |
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else { |
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_logger.write(this.toString(), Logger.WARNING, "Failed to delete the following 'old' alert file: "+alertFile.getPath()); |
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_logger.write(this.toString(), Logger.WARNING, "Failed to delete the following 'stale' alert file: "+alertFile.getPath()); |
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} |
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} |
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} |
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} |
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// ---- RECAP ---- |
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// at this point, we have cleaned up any OK or FINAL alerts |
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// that have passed our age limit. We have then cleaned up |
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// any alerts older the most recent Heartbeat FINAL alert, |
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// as these are probably stale. Any files left are valid and |
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// active alerts. We are now in a position to remove the host |
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// directory if it's empty. |
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// --------------- |
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// do a quick check to see if the directory is now empty |
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File[] newHostdirContents = hostdir.listFiles(); |
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if(newHostdirContents.length == 0) { |
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// it does seem to be, try and delete it |
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// this will fail anyway if files still remain |
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if(!hostdir.delete()) { |
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_logger.write(this.toString(), Logger.WARNING, "Failed to delete the following empty host directory: "+hostdir.getPath()); |
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} |
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} |
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} |
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} |
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} |
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File outFile; |
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// check if we're at a special "end case" (OK or FINAL) |
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if(alert.getLevel()==0 || alert.getLevel()==Alert.alertLevels.length-1) { |
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if(alert.getAttributeName().equals("Heartbeat") && alert.getLevel()==Alert.alertLevels.length-1) { |
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// new file is something like alert.nnnnnnnn.HB.FINAL |
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outFile = new File(rootPath, destFile+".HB."+Alert.alertLevels[alert.getLevel()]); |
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} else { |
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// new file is something like alert.nnnnnnnn.OK |
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outFile = new File(rootPath, destFile+"."+Alert.alertLevels[alert.getLevel()]); |
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} |
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File oldFile = new File(rootPath, destFile); |
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outFile = new File(rootPath, destFile+"."+Alert.alertLevels[alert.getLevel()]); |
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if(!oldFile.renameTo(outFile)) { |
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_logger.write(this.toString(), Logger.WARNING, "Failed to rename old file, "+oldFile.getPath()+" to new file, "+outFile.getPath()); |
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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.org.iscream.util.FormatName class |
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* This uses the uk.org.iscream.cms.server.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 |
