/**
* A base class for {@link JobGenerator} implementations. It is recommended to extend this class to
* implement a new job generator.
*
* <p>The base algorithm iterates over domain configurations within the harvest definition, and
* according to the configuration ({@link HarvesterSettings#JOBGEN_DOMAIN_CONFIG_SUBSET_SIZE},
* constitutes a subset of domain configurations from which one or more jobs will be generated.
*/
abstract class AbstractJobGenerator implements JobGenerator {
/** Logger for this class. */
private static Log log = LogFactory.getLog(AbstractJobGenerator.class);
/** How many domain configurations to process in one go. */
private final long DOMAIN_CONFIG_SUBSET_SIZE =
Settings.getLong(HarvesterSettings.JOBGEN_DOMAIN_CONFIG_SUBSET_SIZE);
/** Is deduplication enabled or disabled. * */
private final boolean DEDUPLICATION_ENABLED =
Settings.getBoolean(HarvesterSettings.DEDUPLICATION_ENABLED);
@Override
public int generateJobs(HarvestDefinition harvest) {
log.info("Generating jobs for harvestdefinition # " + harvest.getOid());
int jobsMade = 0;
final Iterator<DomainConfiguration> domainConfigurations = harvest.getDomainConfigurations();
while (domainConfigurations.hasNext()) {
List<DomainConfiguration> subset = new ArrayList<DomainConfiguration>();
while (domainConfigurations.hasNext() && subset.size() < DOMAIN_CONFIG_SUBSET_SIZE) {
subset.add(domainConfigurations.next());
}
Collections.sort(subset, getDomainConfigurationSubsetComparator(harvest));
if (log.isTraceEnabled()) {
log.trace(
subset.size()
+ " domainconfigs now sorted and ready to processing "
+ "for harvest #"
+ harvest.getOid());
}
jobsMade += processDomainConfigurationSubset(harvest, subset.iterator());
}
harvest.setNumEvents(harvest.getNumEvents() + 1);
if (!harvest.isSnapShot()) {
PartialHarvest focused = (PartialHarvest) harvest;
Schedule schedule = focused.getSchedule();
int numEvents = harvest.getNumEvents();
// Calculate next event
Date now = new Date();
Date nextEvent = schedule.getNextEvent(focused.getNextDate(), numEvents);
// Refuse to schedule event in the past
if (nextEvent != null && nextEvent.before(now)) {
int eventsSkipped = 0;
while (nextEvent != null && nextEvent.before(now)) {
nextEvent = schedule.getNextEvent(nextEvent, numEvents);
eventsSkipped++;
}
if (log.isWarnEnabled()) {
log.warn(
"Refusing to schedule harvest definition '"
+ harvest.getName()
+ "' in the past. Skipped "
+ eventsSkipped
+ " events. Old nextDate was "
+ focused.getNextDate()
+ " new nextDate is "
+ nextEvent);
}
}
// Set next event
focused.setNextDate(nextEvent);
if (log.isTraceEnabled()) {
log.trace(
"Next event for harvest definition "
+ harvest.getName()
+ " happens: "
+ (nextEvent == null ? "Never" : nextEvent.toString()));
}
}
log.info(
"Finished generating " + jobsMade + " jobs for harvestdefinition # " + harvest.getOid());
return jobsMade;
}
/**
* Instantiates a new job.
*
* @param cfg the {@link DomainConfiguration} being processed
* @param harvest the {@link HarvestDefinition} being processed
* @return an instance of {@link Job}
*/
public static Job getNewJob(HarvestDefinition harvest, DomainConfiguration cfg) {
HarvestChannelDAO harvestChannelDao = HarvestChannelDAO.getInstance();
HarvestChannel channel = harvestChannelDao.getChannelForHarvestDefinition(harvest.getOid());
if (channel == null) {
log.info(
"No channel mapping registered for harvest id "
+ harvest.getOid()
+ ", will use default.");
channel = harvestChannelDao.getDefaultChannel(harvest.isSnapShot());
}
if (harvest.isSnapShot()) {
return Job.createSnapShotJob(
harvest.getOid(),
channel,
cfg,
harvest.getMaxCountObjects(),
harvest.getMaxBytes(),
((FullHarvest) harvest).getMaxJobRunningTime(),
harvest.getNumEvents());
}
return Job.createJob(harvest.getOid(), channel, cfg, harvest.getNumEvents());
}
/**
* Returns a comparator used to sort the subset of {@link #DOMAIN_CONFIG_SUBSET_SIZE}
* configurations that are scanned at each iteration.
*
* @param harvest the {@link HarvestDefinition} being processed.
* @return a comparator
*/
protected abstract Comparator<DomainConfiguration> getDomainConfigurationSubsetComparator(
HarvestDefinition harvest);
/**
* Create new jobs from a collection of configurations. All configurations must use the same
* order.xml file.Jobs
*
* @param harvest the {@link HarvestDefinition} being processed.
* @param domainConfSubset the configurations to use to create the jobs
* @return The number of jobs created
* @throws ArgumentNotValid if any of the parameters is null or if the cfglist does not contain
* any configurations
*/
protected abstract int processDomainConfigurationSubset(
HarvestDefinition harvest, Iterator<DomainConfiguration> domainConfSubset);
@Override
public boolean canAccept(Job job, DomainConfiguration cfg) {
if (!checkAddDomainConfInvariant(job, cfg)) {
return false;
}
return checkSpecificAcceptConditions(job, cfg);
}
/**
* Called by {@link #canAccept(Job, DomainConfiguration)}. Tests the implementation-specific
* conditions to accept the given {@link DomainConfiguration} in the given {@link Job}. It is
* assumed that {@link #checkAddDomainConfInvariant(Job, DomainConfiguration)} has already passed.
*
* @param job the {@link Job} n=being built
* @param cfg the {@link DomainConfiguration} to test
* @return true if the configuration passes the conditions.
*/
protected abstract boolean checkSpecificAcceptConditions(Job job, DomainConfiguration cfg);
/**
* Once the job has been filled with {@link DomainConfiguration}s, performs the following
* operations:
*
* <ol>
* <li>Edit the harvest template to add/remove deduplicator configuration.
* <li>
* </ol>
*
* @param job the job
*/
protected void editJobOrderXml(Job job) {
Document doc = job.getOrderXMLdoc();
if (DEDUPLICATION_ENABLED) {
// Check that the Deduplicator element is present in the
// OrderXMl and enabled. If missing or disabled log a warning
if (!HeritrixTemplate.isDeduplicationEnabledInTemplate(doc)) {
if (log.isWarnEnabled()) {
log.warn(
"Unable to perform deduplication for this job"
+ " as the required DeDuplicator element is "
+ "disabled or missing from template");
}
}
} else {
// Remove deduplicator Element from OrderXML if present
Node xpathNode = doc.selectSingleNode(HeritrixTemplate.DEDUPLICATOR_XPATH);
if (xpathNode != null) {
xpathNode.detach();
job.setOrderXMLDoc(doc);
if (log.isInfoEnabled()) {
log.info("Removed DeDuplicator element because " + "Deduplication is disabled");
}
}
}
}
/**
* Tests that:
*
* <ol>
* <li>The given domain configuration and job are not null.
* <li>The job does not already contain the given domain configuration.
* <li>The domain configuration has the same order xml name as the first inserted domain config.
* </ol>
*
* @param job a given Job
* @param cfg a given DomainConfiguration
* @return true, if the given DomainConfiguration can be inserted into the given job
*/
private boolean checkAddDomainConfInvariant(Job job, DomainConfiguration cfg) {
ArgumentNotValid.checkNotNull(job, "job");
ArgumentNotValid.checkNotNull(cfg, "cfg");
// check if domain in DomainConfiguration cfg is not already in this job
// domainName is used as key in domainConfigurationMap
if (job.getDomainConfigurationMap().containsKey(cfg.getDomainName())) {
if (log.isDebugEnabled()) {
log.debug("Job already has a configuration for Domain '" + cfg.getDomainName() + "'.");
}
return false;
}
// check if template is same as this job.
String orderXMLname = job.getOrderXMLName();
if (!orderXMLname.equals(cfg.getOrderXmlName())) {
if (log.isDebugEnabled()) {
log.debug(
"This Job only accept configurations "
+ "using the harvest template '"
+ orderXMLname
+ "'. This configuration uses the harvest template '"
+ cfg.getOrderXmlName()
+ "'.");
}
return false;
}
return true;
}
}
/**
* This class implements a generator for an history chart of a running job. The chart traces the
* progress percentage and the queued URI count over the crawl time. Charts are rendered in a PNG
* image file, generated in the webapp directory.
*/
class StartedJobHistoryChartGen {
/** Time units used to scale the crawl time values and generate the chart's time axis ticks. */
protected static enum TimeAxisResolution {
/** One second. Tick step is 10s. */
second(1, 1, 10),
/** One minute. Tick step is 5m. */
minute(60, 60, 5),
/** One hour. Tick step is 1h. */
hour(60 * minute.seconds, 60 * minute.seconds, 1),
/** Twelve hours. Tick step is 2h. */
half_day(12 * 60 * minute.seconds, 60 * minute.seconds, 2),
/** One day. Tick step is 0.5d. */
day(24 * hour.seconds, 24 * hour.seconds, 0.5),
/** One week. Tick step is 1w. */
week(7 * day.seconds, 7 * day.seconds, 1);
/** The time unit in seconds. */
private final int seconds;
/** The scale in seconds. */
private final int scaleSeconds;
/** The step between two tick units. */
private final double tickStep;
/**
* Builds a time axis resolution.
*
* @param seconds the actual resolution in seconds
* @param scaleSeconds the actual "scale" of ticks
* @param tickStep the number of ticks in one step.
*/
TimeAxisResolution(int seconds, int scaleSeconds, double tickStep) {
this.seconds = seconds;
this.scaleSeconds = scaleSeconds;
this.tickStep = tickStep;
}
/**
* Scale down an array of seconds.
*
* @param timeInSeconds An array of seconds
* @return a scaled down version of the given array of seconds
*/
double[] scale(double[] timeInSeconds) {
double[] scaledTime = new double[timeInSeconds.length];
for (int i = 0; i < timeInSeconds.length; i++) {
scaledTime[i] = timeInSeconds[i] / this.scaleSeconds;
}
return scaledTime;
}
/**
* @param seconds the seconds
* @return the proper timeUnit for the given argument
*/
static TimeAxisResolution findTimeUnit(double seconds) {
TimeAxisResolution[] allTus = values();
for (int i = 0; i < allTus.length - 1; i++) {
TimeAxisResolution nextGreater = allTus[i + 1];
if (seconds < nextGreater.seconds) {
return allTus[i];
}
}
return week; // largest unit
}
}
/** A chart generation task. Generates a PNG image for a job progress history. */
private static class ChartGen implements Runnable {
/** The process that generates the Charts. */
private final StartedJobHistoryChartGen gen;
/**
* Constructor of a ChartGen objector.
*
* @param gen the process that generates the charts.
*/
ChartGen(StartedJobHistoryChartGen gen) {
super();
this.gen = gen;
}
@Override
public void run() {
synchronized (gen) {
gen.chartFile = null;
}
long jobId = gen.jobId;
StartedJobInfo[] fullHistory = RunningJobsInfoDAO.getInstance().getFullJobHistory(jobId);
LinkedList<Double> timeValues = new LinkedList<Double>();
LinkedList<Double> progressValues = new LinkedList<Double>();
LinkedList<Double> urlValues = new LinkedList<Double>();
for (StartedJobInfo sji : fullHistory) {
timeValues.add((double) sji.getElapsedSeconds());
progressValues.add(sji.getProgress());
urlValues.add((double) sji.getQueuedFilesCount());
}
// Refresh the history png image for the job.
File pngFile = new File(gen.outputFolder, jobId + "-history.png");
File newPngFile;
try {
newPngFile =
File.createTempFile(jobId + "-history", "." + System.currentTimeMillis() + ".png");
} catch (IOException e) {
LOG.warn("Failed to create temp PNG file for job " + jobId);
return;
}
long startTime = System.currentTimeMillis();
gen.generatePngChart(
newPngFile,
CHART_RESOLUTION[0],
CHART_RESOLUTION[1],
null, // no chart title
I18N.getString(gen.locale, "running.job.details.chart.legend.crawlTime"),
new String[] {
I18N.getString(gen.locale, "running.job.details.chart.legend.progress"),
I18N.getString(gen.locale, "running.job.details.chart.legend.queuedUris")
},
NumberUtils.toPrimitiveArray(timeValues),
new double[][] {new double[] {0, 100}, null},
new double[][] {
NumberUtils.toPrimitiveArray(progressValues), NumberUtils.toPrimitiveArray(urlValues)
},
new Color[] {Color.blue, Color.green.darker()},
new String[] {"%", ""},
false,
Color.lightGray.brighter().brighter());
long genTime = System.currentTimeMillis() - startTime;
LOG.info(
"Generated history chart for job "
+ jobId
+ " in "
+ (genTime < TimeUtils.SECOND_IN_MILLIS
? genTime + " ms"
: StringUtils.formatDuration(genTime / TimeUtils.SECOND_IN_MILLIS))
+ ".");
synchronized (gen) {
// Overwrite old file, then delete temp file
try {
FileUtils.copyFile(newPngFile, pngFile);
FileUtils.remove(newPngFile);
} catch (IOFailure iof) {
LOG.error("IOFailure while copying PNG file", iof);
}
gen.chartFile = pngFile;
}
}
}
/** The class logger. */
static final Log LOG = LogFactory.getLog(StartedJobHistoryChartGen.class);
/** Internationalisation object. */
private static final I18n I18N = new I18n(dk.netarkivet.harvester.Constants.TRANSLATIONS_BUNDLE);
/** Rate in seconds at which history charts should be generated. */
private static final long GEN_INTERVAL =
Settings.getLong(HarvesterSettings.HARVEST_MONITOR_HISTORY_CHART_GEN_INTERVAL);
/** The chart image resolution. */
private static final int[] CHART_RESOLUTION = new int[] {600, 450};
/** The dimension of the chart axis. */
private static final double CHART_AXIS_DIMENSION = 10.0;
/** The relative path of the output. */
private static final String OUTPUT_REL_PATH = "History" + File.separator + "webapp";
/** The job id. */
private final long jobId;
/** The folder where image files are output. */
private final File outputFolder;
/** The chart image file. */
private File chartFile = null;
/** The locale for internationalizing the chart. The locale is set to the system default. */
private final Locale locale;
/** The process controlling the cyclic regeneration of charts. */
private PeriodicTaskExecutor genExec = null;
/**
* Constructor. Start generating charts for data belonging to the given job.
*
* @param jobId a job id.
*/
StartedJobHistoryChartGen(long jobId) {
super();
this.outputFolder = new File(FileUtils.getTempDir() + File.separator + OUTPUT_REL_PATH);
this.jobId = jobId;
// Set the locale to the system default
this.locale = Locale.getDefault();
genExec = new PeriodicTaskExecutor("ChartGen", new ChartGen(this), 0, GEN_INTERVAL);
}
/**
* Returns the image file.
*
* @return the image file. Might return null if no file is currently available.
*/
public synchronized File getChartFile() {
return chartFile;
}
/** Deletes the chart image if it exists and stops the generation schedule. */
public void cleanup() {
if (chartFile != null && chartFile.exists()) {
if (!chartFile.delete()) {
chartFile.deleteOnExit();
}
}
if (genExec != null) {
genExec.shutdown();
}
}
/**
* Generates a chart in PNG format.
*
* @param outputFile the output file, it should exist.
* @param pxWidth the image width in pixels.
* @param pxHeight the image height in pixels.
* @param chartTitle the chart title, may be null.
* @param xAxisTitle the x axis title
* @param yDataSeriesRange the axis range (null for auto)
* @param yDataSeriesTitles the Y axis titles.
* @param timeValuesInSeconds the time values in seconds
* @param yDataSeries the Y axis value series.
* @param yDataSeriesColors the Y axis value series drawing colors.
* @param yDataSeriesTickSuffix TODO explain argument yDataSeriesTickSuffix
* @param drawBorder draw, or not, the border.
* @param backgroundColor the chart background color.
*/
final void generatePngChart(
File outputFile,
int pxWidth,
int pxHeight,
String chartTitle,
String xAxisTitle,
String[] yDataSeriesTitles,
double[] timeValuesInSeconds,
double[][] yDataSeriesRange,
double[][] yDataSeries,
Color[] yDataSeriesColors,
String[] yDataSeriesTickSuffix,
boolean drawBorder,
Color backgroundColor) {
// Domain axis
NumberAxis xAxis = new NumberAxis(xAxisTitle);
xAxis.setFixedDimension(CHART_AXIS_DIMENSION);
xAxis.setLabelPaint(Color.black);
xAxis.setTickLabelPaint(Color.black);
double maxSeconds = getMaxValue(timeValuesInSeconds);
TimeAxisResolution xAxisRes = TimeAxisResolution.findTimeUnit(maxSeconds);
xAxis.setTickUnit(new NumberTickUnit(xAxisRes.tickStep));
double[] scaledTimeValues = xAxisRes.scale(timeValuesInSeconds);
String tickSymbol =
I18N.getString(locale, "running.job.details.chart.timeunit.symbol." + xAxisRes.name());
xAxis.setNumberFormatOverride(new DecimalFormat("###.##'" + tickSymbol + "'"));
// First dataset
String firstDataSetTitle = yDataSeriesTitles[0];
XYDataset firstDataSet = createXYDataSet(firstDataSetTitle, scaledTimeValues, yDataSeries[0]);
Color firstDataSetColor = yDataSeriesColors[0];
// First range axis
NumberAxis firstYAxis = new NumberAxis(firstDataSetTitle);
firstYAxis.setFixedDimension(CHART_AXIS_DIMENSION);
setAxisRange(firstYAxis, yDataSeriesRange[0]);
firstYAxis.setLabelPaint(firstDataSetColor);
firstYAxis.setTickLabelPaint(firstDataSetColor);
String firstAxisTickSuffix = yDataSeriesTickSuffix[0];
if (firstAxisTickSuffix != null && !firstAxisTickSuffix.isEmpty()) {
firstYAxis.setNumberFormatOverride(new DecimalFormat("###.##'" + firstAxisTickSuffix + "'"));
}
// Create the plot with domain axis and first range axis
XYPlot plot = new XYPlot(firstDataSet, xAxis, firstYAxis, null);
XYLineAndShapeRenderer firstRenderer = new XYLineAndShapeRenderer(true, false);
plot.setRenderer(firstRenderer);
plot.setOrientation(PlotOrientation.VERTICAL);
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));
firstRenderer.setSeriesPaint(0, firstDataSetColor);
// Now iterate on next axes
for (int i = 1; i < yDataSeries.length; i++) {
// Create axis
String seriesTitle = yDataSeriesTitles[i];
Color seriesColor = yDataSeriesColors[i];
NumberAxis yAxis = new NumberAxis(seriesTitle);
yAxis.setFixedDimension(CHART_AXIS_DIMENSION);
setAxisRange(yAxis, yDataSeriesRange[i]);
yAxis.setLabelPaint(seriesColor);
yAxis.setTickLabelPaint(seriesColor);
String yAxisTickSuffix = yDataSeriesTickSuffix[i];
if (yAxisTickSuffix != null && !yAxisTickSuffix.isEmpty()) {
yAxis.setNumberFormatOverride(new DecimalFormat("###.##'" + yAxisTickSuffix + "'"));
}
// Create dataset and add axis to plot
plot.setRangeAxis(i, yAxis);
plot.setRangeAxisLocation(i, AxisLocation.BOTTOM_OR_LEFT);
plot.setDataset(i, createXYDataSet(seriesTitle, scaledTimeValues, yDataSeries[i]));
plot.mapDatasetToRangeAxis(i, i);
XYItemRenderer renderer = new StandardXYItemRenderer();
renderer.setSeriesPaint(0, seriesColor);
plot.setRenderer(i, renderer);
}
// Create the chart
JFreeChart chart = new JFreeChart(chartTitle, JFreeChart.DEFAULT_TITLE_FONT, plot, false);
// Customize rendering
chart.setBackgroundPaint(Color.white);
chart.setBorderVisible(true);
chart.setBorderPaint(Color.BLACK);
// Render image
try {
ChartUtilities.saveChartAsPNG(outputFile, chart, pxWidth, pxHeight);
} catch (IOException e) {
LOG.error("Chart export failed", e);
}
}
/**
* Create a XYDataset based on the given arguments.
*
* @param name The name
* @param timeValues The timevalues
* @param values the values
* @return a DefaultXYDataset.
*/
private XYDataset createXYDataSet(String name, double[] timeValues, double[] values) {
DefaultXYDataset ds = new DefaultXYDataset();
ds.addSeries(name, new double[][] {timeValues, values});
return ds;
}
/**
* Find the maximum of the values given. If this maximum is less than {@link Double#MIN_VALUE}
* then {@link Double#MIN_VALUE} is returned.
*
* @param values an array of doubles
* @return the maximum of the values given
*/
private double getMaxValue(double[] values) {
double max = Double.MIN_VALUE;
for (double v : values) {
max = Math.max(v, max);
}
return max;
}
/**
* Set the axis range.
*
* @param axis a numberAxis
* @param range a range
*/
private void setAxisRange(NumberAxis axis, double[] range) {
if (range == null || range.length != 2) {
axis.setAutoRange(true);
} else {
double lower = range[0];
double upper = range[1];
ArgumentNotValid.checkTrue(lower < upper, "Incorrect range");
axis.setAutoRange(false);
axis.setRange(new Range(lower, upper));
}
}
}