- a new database for url reference data ('seen links')
- a new database extending the references to the full url metadata
attributes set which shall replace the old metadata database if it is
finished
- migration help classes stub to use old and new metadata databases
simultanously
the links between all pages are now stored. The same index structure as
used for the word index is used to make a reverse link index.
The new file(s) in SEGMENT/default/citation.index.*.blob store the
citation index. This will be used to create much more detailed link
structures for the YaCy apis and to create a better ranking. A ranking
using the citation.index should provide better results especially for
portal indexes and initranets.
See
http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html
and the following test programm:
public class QueueLengthTimeTest {
public static long countTest(Queue<Integer> q, int c) {
long t = System.currentTimeMillis();
for (int i = 0; i < c; i++) {
q.add(q.size());
}
return System.currentTimeMillis() - t;
}
public static void main(String[] args) {
int c = 1;
for (int i = 0; i < 100; i++) {
Runtime.getRuntime().gc();
long t1 = countTest(new ArrayBlockingQueue<Integer>(c), c);
Runtime.getRuntime().gc();
long t2 = countTest(new LinkedBlockingQueue<Integer>(), c);
Runtime.getRuntime().gc();
long t3 = countTest(new ConcurrentLinkedQueue<Integer>(),
c);
System.out.println("count = " + c + ": ArrayBlockingQueue =
" + t1 + ", LinkedBlockingQueue = " + t2 + ", ConcurrentLinkedQueue = "
+ t3);
c = c * 2;
}
}
}
1. Improved and fixed language detection:
1.1 Identificator.java - recognition fix (improved)
1.2 DCEntry.java - fix (changed detection order due to detection from
tld in many cases is incorrect)
1.3 MultiProtocolURI.java - fixed and enhanced language from tld
detection (all currently used top-level domains; ccTLD added but not
tested).
2. Ukrainian language update.
3. Main Slavic languages langstats (tested and works fine).
ready-prepared crawl list but at the stacks of the domains that are
stored for balanced crawling. This affects also the balancer since that
does not need to prepare the pre-selected crawl list for monitoring. As
a effect:
- it is no more possible to see the correct order of next to-be-crawled
links, since that depends on the actual state of the balancer stack the
next time another url is requested for loading
- the balancer works better since the next url can be selected according
to the current situation and not according to a pre-selected order.
but this did not solve all problems because a bug in the apache http
client prevented that it worked. Thread dump:
Caused by: java.lang.NumberFormatException: For input string:
"1450:400c:c01:0:0:0:69"
at
java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:458)
at java.lang.Integer.parseInt(Integer.java:499)
at org.apache.http.client.utils.URIUtils.extractHost(URIUtils.java:310)
at
org.apache.http.impl.client.AbstractHttpClient.determineTarget(AbstractHttpClient.java:764)
at
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
at net.yacy.cora.protocol.http.HTTPClient.execute(HTTPClient.java:597)
at
net.yacy.cora.protocol.http.HTTPClient.getContentBytes(HTTPClient.java:558)
at net.yacy.cora.protocol.http.HTTPClient.GETbytes(HTTPClient.java:341)
at de.anomic.crawler.retrieval.HTTPLoader.load(HTTPLoader.java:131)
at de.anomic.crawler.retrieval.HTTPLoader.load(HTTPLoader.java:74)
at
net.yacy.repository.LoaderDispatcher.loadInternal(LoaderDispatcher.java:274)
at net.yacy.repository.LoaderDispatcher.load(LoaderDispatcher.java:164)
at net.yacy.repository.LoaderDispatcher.load(LoaderDispatcher.java:150)
at
net.yacy.repository.LoaderDispatcher.loadDocument(LoaderDispatcher.java:355)
at getpageinfo_p.respond(getpageinfo_p.java:97)
during receiving of DHT submissions and when answering remote search
requests. Both events together may have caused IO-deadlocking and this
commit shall fix that.
Michael Peter Christen