protected void decisionMade(
CrawlURI uri, DecideRule decisiveRule, int decisiveRuleNumber, DecideResult result) {
if (fileLogger != null) {
JSONObject extraInfo = null;
if (logExtraInfo) {
CrawlHost crawlHost = getServerCache().getHostFor(uri.getUURI());
String host = "-";
if (crawlHost != null) {
host = crawlHost.fixUpName();
}
extraInfo = new JSONObject();
extraInfo.put("hopPath", uri.getPathFromSeed());
extraInfo.put("via", uri.getVia());
extraInfo.put("seed", uri.getSourceTag());
extraInfo.put("host", host);
}
fileLogger.info(
decisiveRuleNumber
+ " "
+ decisiveRule.getClass().getSimpleName()
+ " "
+ result
+ " "
+ uri
+ (extraInfo != null ? " " + extraInfo : ""));
}
}
public Map<String, Object> shortReportMap() {
Map<String, Object> data = new LinkedHashMap<String, Object>();
data.put("serialNumber", serialNumber);
CrawlURI c = currentCuri;
if (c != null) {
data.put("currentURI", c.toString());
data.put("currentProcessor", currentProcessorName);
data.put("fetchAttempts", c.getFetchAttempts());
} else {
data.put("currentURI", null);
}
long now = System.currentTimeMillis();
long time = 0;
if (lastFinishTime > lastStartTime) {
data.put("status", "WAITING");
time = now - lastFinishTime;
} else if (lastStartTime > 0) {
data.put("status", "ACTIVE");
time = now - lastStartTime;
}
data.put("currentStatusElapsedMilliseconds", time);
data.put("currentStatusElapsedPretty", ArchiveUtils.formatMillisecondsToConventional(time));
data.put("step", step);
return data;
}
public void testOutOfBounds() throws Exception {
MatchesStatusCodeDecideRule dr = makeDecideRule(400, 499);
CrawlURI testUri = createTestUri("http://www.archive.org");
testUri.setFetchStatus(200);
assertFalse(dr.evaluate(testUri));
}
/**
* Compiles and returns a report on its status.
*
* @param name Report name.
* @param pw Where to print.
*/
public void reportTo(String name, PrintWriter pw) {
// name is ignored for now: only one kind of report
pw.print("[");
pw.println(getName());
// Make a local copy of the currentCuri reference in case it gets
// nulled while we're using it. We're doing this because
// alternative is synchronizing and we don't want to do this --
// it causes hang ups as controller waits on a lock for this thread,
// something it gets easily enough on old threading model but something
// it can wait interminably for on NPTL threading model.
// See [ 994946 ] Pause/Terminate ignored on 2.6 kernel 1.5 JVM.
CrawlURI c = currentCuri;
if (c != null) {
pw.print(" ");
c.shortReportLineTo(pw);
pw.print(" ");
pw.print(c.getFetchAttempts());
pw.print(" attempts");
pw.println();
pw.print(" ");
pw.print("in processor: ");
pw.print(currentProcessorName);
} else {
pw.print(" -no CrawlURI- ");
}
pw.println();
long now = System.currentTimeMillis();
long time = 0;
pw.print(" ");
if (lastFinishTime > lastStartTime) {
// That means we finished something after we last started something
// or in other words we are not working on anything.
pw.print("WAITING for ");
time = now - lastFinishTime;
} else if (lastStartTime > 0) {
// We are working on something
pw.print("ACTIVE for ");
time = now - lastStartTime;
}
pw.print(ArchiveUtils.formatMillisecondsToConventional(time));
pw.println();
pw.print(" ");
pw.print("step: ");
pw.print(step);
pw.print(" for ");
pw.print(
ArchiveUtils.formatMillisecondsToConventional(System.currentTimeMillis() - atStepSince));
pw.println();
reportThread(this, pw);
pw.print("]");
pw.println();
pw.flush();
}
/**
* Delete all CrawlURIs matching the given expression.
*
* @param match
* @param queue
* @param headKey
* @return count of deleted items
* @throws DatabaseException
* @throws DatabaseException
*/
public long deleteMatchingFromQueue(String match, String queue, DatabaseEntry headKey)
throws DatabaseException {
long deletedCount = 0;
Pattern pattern = Pattern.compile(match);
DatabaseEntry key = headKey;
DatabaseEntry value = new DatabaseEntry();
Cursor cursor = null;
try {
cursor = pendingUrisDB.openCursor(null, null);
OperationStatus result = cursor.getSearchKeyRange(headKey, value, null);
while (result == OperationStatus.SUCCESS) {
if (value.getData().length > 0) {
CrawlURI curi = (CrawlURI) crawlUriBinding.entryToObject(value);
if (!curi.getClassKey().equals(queue)) {
// rolled into next queue; finished with this queue
break;
}
if (pattern.matcher(curi.toString()).matches()) {
cursor.delete();
deletedCount++;
}
}
result = cursor.getNext(key, value, null);
}
} finally {
if (cursor != null) {
cursor.close();
}
}
return deletedCount;
}
/**
* Delete the given CrawlURI from persistent store. Requires the key under which it was stored be
* available.
*
* @param item
* @throws DatabaseException
*/
public void delete(CrawlURI item) throws DatabaseException {
OperationStatus status;
DatabaseEntry de = (DatabaseEntry) item.getHolderKey();
status = pendingUrisDB.delete(null, de);
if (status != OperationStatus.SUCCESS) {
LOGGER.severe(
"expected item not present: "
+ item
+ "("
+ (new BigInteger(((DatabaseEntry) item.getHolderKey()).getData())).toString(16)
+ ")");
}
}
/**
* Calculate the insertKey that places a CrawlURI in the desired spot. First bytes are always
* classKey (usu. host) based -- ensuring grouping by host -- terminated by a zero byte. Then 8
* bytes of data ensuring desired ordering within that 'queue' are used. The first byte of these 8
* is priority -- allowing 'immediate' and 'soon' items to sort above regular. Next 1 byte is
* 'precedence'. Last 6 bytes are ordinal serial number, ensuring earlier-discovered URIs sort
* before later.
*
* <p>NOTE: Dangers here are: (1) priorities or precedences over 2^7 (signed byte comparison) (2)
* ordinals over 2^48
*
* <p>Package access & static for testing purposes.
*
* @param curi
* @return a DatabaseEntry key for the CrawlURI
*/
static DatabaseEntry calculateInsertKey(CrawlURI curi) {
byte[] classKeyBytes = null;
int len = 0;
classKeyBytes = curi.getClassKey().getBytes(Charsets.UTF_8);
len = classKeyBytes.length;
byte[] keyData = new byte[len + 9];
System.arraycopy(classKeyBytes, 0, keyData, 0, len);
keyData[len] = 0;
long ordinalPlus = curi.getOrdinal() & 0x0000FFFFFFFFFFFFL;
ordinalPlus = ((long) curi.getSchedulingDirective() << 56) | ordinalPlus;
long precedence = Math.min(curi.getPrecedence(), 127);
ordinalPlus = (((precedence) & 0xFFL) << 48) | ordinalPlus;
ArchiveUtils.longIntoByteArray(ordinalPlus, keyData, len + 1);
return new DatabaseEntry(keyData);
}
/**
* Get the next nearest item after the given key. Relies on external discipline -- we'll look at
* the queues count of how many items it has -- to avoid asking for something from a range where
* there are no associated items -- otherwise could get first item of next 'queue' by mistake.
*
* <p>TODO: hold within a queue's range
*
* @param headKey Key prefix that demarks the beginning of the range in <code>pendingUrisDB</code>
* we're interested in.
* @return CrawlURI.
* @throws DatabaseException
*/
public CrawlURI get(DatabaseEntry headKey) throws DatabaseException {
DatabaseEntry result = new DatabaseEntry();
// From Linda Lee of sleepycat:
// "You want to check the status returned from Cursor.getSearchKeyRange
// to make sure that you have OperationStatus.SUCCESS. In that case,
// you have found a valid data record, and result.getData()
// (called by internally by the binding code, in this case) will be
// non-null. The other possible status return is
// OperationStatus.NOTFOUND, in which case no data record matched
// the criteria. "
OperationStatus status = getNextNearestItem(headKey, result);
CrawlURI retVal = null;
if (status != OperationStatus.SUCCESS) {
LOGGER.severe(
"See '1219854 NPE je-2.0 "
+ "entryToObject...'. OperationStatus "
+ " was not SUCCESS: "
+ status
+ ", headKey "
+ BdbWorkQueue.getPrefixClassKey(headKey.getData()));
return null;
}
try {
retVal = (CrawlURI) crawlUriBinding.entryToObject(result);
} catch (ClassCastException cce) {
Object obj = crawlUriBinding.entryToObject(result);
LOGGER.log(
Level.SEVERE,
"see [#HER-1283]: deserialized "
+ obj.getClass()
+ " has ClassLoader "
+ obj.getClass().getClassLoader().getClass(),
cce);
return null;
} catch (RuntimeExceptionWrapper rw) {
LOGGER.log(
Level.SEVERE,
"expected object missing in queue " + BdbWorkQueue.getPrefixClassKey(headKey.getData()),
rw);
return null;
}
retVal.setHolderKey(headKey);
return retVal;
}
/** @param w PrintWriter to write to. */
public void shortReportLineTo(PrintWriter w) {
w.print("#");
w.print(this.serialNumber);
// Make a local copy of the currentCuri reference in case it gets
// nulled while we're using it. We're doing this because
// alternative is synchronizing and we don't want to do this --
// it causes hang ups as controller waits on a lock for this thread,
// something it gets easily enough on old threading model but something
// it can wait interminably for on NPTL threading model.
// See [ 994946 ] Pause/Terminate ignored on 2.6 kernel 1.5 JVM.
CrawlURI c = currentCuri;
if (c != null) {
w.print(" ");
w.print(currentProcessorName);
w.print(" ");
w.print(c.toString());
w.print(" (");
w.print(c.getFetchAttempts());
w.print(") ");
} else {
w.print(" [no CrawlURI] ");
}
long now = System.currentTimeMillis();
long time = 0;
if (lastFinishTime > lastStartTime) {
// That means we finished something after we last started something
// or in other words we are not working on anything.
w.print("WAITING for ");
time = now - lastFinishTime;
} else if (lastStartTime > 0) {
// We are working on something
w.print("ACTIVE for ");
time = now - lastStartTime;
}
w.print(ArchiveUtils.formatMillisecondsToConventional(time));
w.print(" at ");
w.print(step);
w.print(" for ");
w.print(ArchiveUtils.formatMillisecondsToConventional(now - atStepSince));
w.print("\n");
w.flush();
}
/**
* Merge any data from the Map stored in the URI-history store into the current instance.
*
* <p>TODO: ensure compatibility with use of PersistLoadProcessor; suppress double-loading
*
* @param curi CrawlURI to receive prior state data
*/
protected void mergePrior(CrawlURI curi) {
String key = PersistProcessor.persistKeyFor(curi);
@SuppressWarnings({"rawtypes", "unchecked"})
Map<String, Map> prior = (Map<String, Map>) store.get(key);
if (prior != null) {
// merge in keys
curi.getData().putAll(prior);
}
}
/**
* Terminates a thread.
*
* <p>Calling this method will ensure that the current thread will stop processing as soon as
* possible (note: this may be never). Meant to 'short circuit' hung threads.
*
* <p>Current crawl uri will have its fetch status set accordingly and will be immediately
* returned to the frontier.
*
* <p>As noted before, this does not ensure that the thread will stop running (ever). But once
* evoked it will not try and communicate with other parts of crawler and will terminate as soon
* as control is established.
*/
protected void kill() {
this.interrupt();
synchronized (this) {
if (currentCuri != null) {
currentCuri.setFetchStatus(S_PROCESSING_THREAD_KILLED);
controller.getFrontier().finished(currentCuri);
}
}
}
/* (non-Javadoc)
* @see org.archive.crawler.frontier.precedence.BaseUriPrecedencePolicy#calculatePrecedence(org.archive.crawler.datamodel.CrawlURI)
*/
@Override
protected int calculatePrecedence(CrawlURI curi) {
mergePrior(curi);
Integer preloadPrecedence = (Integer) curi.getData().get(A_PRECALC_PRECEDENCE);
if (preloadPrecedence == null) {
return 0;
}
return super.calculatePrecedence(curi) + preloadPrecedence;
}
/* (non-Javadoc)
* @see org.archive.crawler.frontier.precedence.BaseUriPrecedencePolicy#uriScheduled(org.archive.crawler.datamodel.CrawlURI)
*/
@Override
public void uriScheduled(CrawlURI curi) {
int precedence = calculatePrecedence(curi);
if (precedence == 0) {
// fall back to configured default policy
getDefaultUriPrecedencePolicy().uriScheduled(curi);
return;
}
curi.setPrecedence(precedence);
}
private void seriousError(Error err) {
// try to prevent timeslicing until we have a chance to deal with OOM
// Note that modern-day JVM priority indifference with native threads
// may make this priority-jumbling pointless
setPriority(DEFAULT_PRIORITY + 1);
if (controller != null) {
// hold all ToeThreads from proceeding to next processor
controller.freeReserveMemory();
controller.requestCrawlPause();
if (controller.getFrontier().getFrontierJournal() != null) {
controller.getFrontier().getFrontierJournal().seriousError(getName() + err.getMessage());
}
}
// OutOfMemory etc.
String extraInfo = DevUtils.extraInfo();
System.err.println("<<<");
System.err.println(ArchiveUtils.getLog17Date());
System.err.println(err);
System.err.println(extraInfo);
err.printStackTrace(System.err);
if (controller != null) {
PrintWriter pw = new PrintWriter(System.err);
controller.getToePool().compactReportTo(pw);
pw.flush();
}
System.err.println(">>>");
// DevUtils.sigquitSelf();
String context = "unknown";
if (currentCuri != null) {
// update fetch-status, saving original as annotation
currentCuri.getAnnotations().add("err=" + err.getClass().getName());
currentCuri.getAnnotations().add("os" + currentCuri.getFetchStatus());
currentCuri.setFetchStatus(S_SERIOUS_ERROR);
context = currentCuri.shortReportLine() + " in " + currentProcessorName;
}
String message = "Serious error occured trying " + "to process '" + context + "'\n" + extraInfo;
logger.log(Level.SEVERE, message.toString(), err);
setPriority(DEFAULT_PRIORITY);
}
/**
* Handling for exceptions and errors that are possibly recoverable.
*
* @param e
*/
private void recoverableProblem(Throwable e) {
Object previousStep = step;
setStep(Step.HANDLING_RUNTIME_EXCEPTION, null);
// e.printStackTrace(System.err);
currentCuri.setFetchStatus(S_RUNTIME_EXCEPTION);
// store exception temporarily for logging
currentCuri.getAnnotations().add("err=" + e.getClass().getName());
currentCuri.getData().put(A_RUNTIME_EXCEPTION, e);
String message =
"Problem "
+ e
+ " occured when trying to process '"
+ currentCuri.toString()
+ "' at step "
+ previousStep
+ " in "
+ currentProcessorName
+ "\n";
logger.log(Level.SEVERE, message.toString(), e);
}
/**
* Add constant penalties for certain features of URI (and its 'via') that make it more
* delayable/skippable.
*
* @param curi CrawlURI to be assigned a cost
* @see org.archive.crawler.frontier.CostAssignmentPolicy#costOf(org.archive.modules.CrawlURI)
*/
public int costOf(CrawlURI curi) {
int cost = 1;
UURI uuri = curi.getUURI();
if (uuri.hasQuery()) {
// has query string
cost++;
int qIndex = uuri.toString().indexOf('?');
if (curi.flattenVia().startsWith(uuri.toString().substring(0, qIndex))) {
// non-query-string portion of URI is same as previous
cost++;
}
// TODO: other potential query-related cost penalties:
// - more than X query-string attributes
// - calendarish terms
// - query-string over certain size
}
// TODO: other potential path-based penalties
// - new path is simply extension of via path
// - many path segments
// TODO: other potential hops-based penalties
// - more than X hops
// - each speculative hop
return cost;
}
/**
* Put the given CrawlURI in at the appropriate place.
*
* @param curi
* @throws DatabaseException
*/
public void put(CrawlURI curi, boolean overwriteIfPresent) throws DatabaseException {
DatabaseEntry insertKey = (DatabaseEntry) curi.getHolderKey();
if (insertKey == null) {
insertKey = calculateInsertKey(curi);
curi.setHolderKey(insertKey);
}
DatabaseEntry value = new DatabaseEntry();
crawlUriBinding.objectToEntry(curi, value);
// Output tally on avg. size if level is FINE or greater.
if (LOGGER.isLoggable(Level.FINE)) {
tallyAverageEntrySize(curi, value);
}
OperationStatus status;
if (overwriteIfPresent) {
status = pendingUrisDB.put(null, insertKey, value);
} else {
status = pendingUrisDB.putNoOverwrite(null, insertKey, value);
}
if (status != OperationStatus.SUCCESS) {
LOGGER.log(
Level.SEVERE, "URI enqueueing failed; " + status + " " + curi, new RuntimeException());
}
}
/**
* Return a preferred String key for persisting the given CrawlURI's AList state.
*
* @param curi CrawlURI
* @return String key
*/
public static String persistKeyFor(CrawlURI curi) {
// use a case-sensitive SURT for uniqueness and sorting benefits
return persistKeyFor(curi.getUURI().toString());
}
/**
* (non-Javadoc)
*
* @see java.lang.Thread#run()
*/
public void run() {
String name = controller.getMetadata().getJobName();
logger.fine(getName() + " started for order '" + name + "'");
Recorder.setHttpRecorder(httpRecorder);
try {
while (true) {
ArchiveUtils.continueCheck();
setStep(Step.ABOUT_TO_GET_URI, null);
CrawlURI curi = controller.getFrontier().next();
synchronized (this) {
ArchiveUtils.continueCheck();
setCurrentCuri(curi);
currentCuri.setThreadNumber(this.serialNumber);
lastStartTime = System.currentTimeMillis();
currentCuri.setRecorder(httpRecorder);
}
try {
KeyedProperties.loadOverridesFrom(curi);
controller.getFetchChain().process(curi, this);
controller.getFrontier().beginDisposition(curi);
controller.getDispositionChain().process(curi, this);
} catch (RuntimeExceptionWrapper e) {
// Workaround to get cause from BDB
if (e.getCause() == null) {
e.initCause(e.getCause());
}
recoverableProblem(e);
} catch (AssertionError ae) {
// This risks leaving crawl in fatally inconsistent state,
// but is often reasonable for per-Processor assertion problems
recoverableProblem(ae);
} catch (RuntimeException e) {
recoverableProblem(e);
} catch (InterruptedException e) {
if (currentCuri != null) {
recoverableProblem(e);
Thread.interrupted(); // clear interrupt status
} else {
throw e;
}
} catch (StackOverflowError err) {
recoverableProblem(err);
} catch (Error err) {
// OutOfMemory and any others
seriousError(err);
} finally {
KeyedProperties.clearOverridesFrom(curi);
}
setStep(Step.ABOUT_TO_RETURN_URI, null);
ArchiveUtils.continueCheck();
synchronized (this) {
controller.getFrontier().finished(currentCuri);
controller.getFrontier().endDisposition();
setCurrentCuri(null);
}
setStep(Step.FINISHING_PROCESS, null);
lastFinishTime = System.currentTimeMillis();
if (shouldRetire) {
break; // from while(true)
}
}
} catch (InterruptedException e) {
if (currentCuri != null) {
logger.log(
Level.SEVERE,
"Interrupt leaving unfinished CrawlURI " + getName() + " - job may hang",
e);
}
// thread interrupted, ok to end
logger.log(Level.FINE, this.getName() + " ended with Interruption");
} catch (Exception e) {
// everything else (including interruption)
logger.log(Level.SEVERE, "Fatal exception in " + getName(), e);
} catch (OutOfMemoryError err) {
seriousError(err);
} finally {
controller.getFrontier().endDisposition();
}
setCurrentCuri(null);
// Do cleanup so that objects can be GC.
this.httpRecorder.closeRecorders();
this.httpRecorder = null;
logger.fine(getName() + " finished for order '" + name + "'");
setStep(Step.FINISHED, null);
controller = null;
}
/**
* @param m marker or null to start with first entry
* @param maxMatches
* @return list of matches starting from marker position
* @throws DatabaseException
*/
public CompositeData getFrom(String m, int maxMatches, Pattern pattern, boolean verbose)
throws DatabaseException {
int matches = 0;
int tries = 0;
ArrayList<String> results = new ArrayList<String>(maxMatches);
DatabaseEntry key;
if (m == null) {
key = getFirstKey();
} else {
byte[] marker = m.getBytes(); // = FrontierJMXTypes.fromString(m);
key = new DatabaseEntry(marker);
}
DatabaseEntry value = new DatabaseEntry();
Cursor cursor = null;
OperationStatus result = null;
try {
cursor = pendingUrisDB.openCursor(null, null);
result = cursor.getSearchKey(key, value, null);
while (matches < maxMatches && result == OperationStatus.SUCCESS) {
if (value.getData().length > 0) {
CrawlURI curi = (CrawlURI) crawlUriBinding.entryToObject(value);
if (pattern.matcher(curi.toString()).matches()) {
if (verbose) {
results.add("[" + curi.getClassKey() + "] " + curi.shortReportLine());
} else {
results.add(curi.toString());
}
matches++;
}
tries++;
}
result = cursor.getNext(key, value, null);
}
} finally {
if (cursor != null) {
cursor.close();
}
}
if (result != OperationStatus.SUCCESS) {
// end of scan
m = null;
} else {
m = new String(key.getData()); // = FrontierJMXTypes.toString(key.getData());
}
String[] arr = results.toArray(new String[results.size()]);
CompositeData cd;
try {
cd =
new CompositeDataSupport(
/*FrontierJMXTypes.URI_LIST_DATA*/ null,
new String[] {"list", "marker"},
new Object[] {arr, m});
} catch (OpenDataException e) {
throw new IllegalStateException(e);
}
return cd;
}
