/** Get cash on hand, divide it by the number of outlinks and apply. */
@Override
public void distributeScoreToOutlinks(
String fromUrl, WebPage row, Collection<ScoreDatum> scoreData, int allCount) {
ByteBuffer cashRaw = row.getMetadata().get(CASH_KEY);
if (cashRaw == null) {
return;
}
float cash = Bytes.toFloat(cashRaw.array(), cashRaw.arrayOffset() + cashRaw.position());
if (cash == 0) {
return;
}
// TODO: count filtered vs. all count for outlinks
float scoreUnit = cash / allCount;
// internal and external score factor
float internalScore = scoreUnit * internalScoreFactor;
float externalScore = scoreUnit * externalScoreFactor;
for (ScoreDatum scoreDatum : scoreData) {
try {
String toHost = new URL(scoreDatum.getUrl()).getHost();
String fromHost = new URL(fromUrl.toString()).getHost();
if (toHost.equalsIgnoreCase(fromHost)) {
scoreDatum.setScore(internalScore);
} else {
scoreDatum.setScore(externalScore);
}
} catch (MalformedURLException e) {
LOG.error("Failed with the following MalformedURLException: ", e);
scoreDatum.setScore(externalScore);
}
}
// reset cash to zero
row.getMetadata().put(CASH_KEY, ByteBuffer.wrap(Bytes.toBytes(0.0f)));
}
/** Increase the score by a sum of inlinked scores. */
@Override
public void updateScore(String url, WebPage page, List<ScoreDatum> inlinkedScoreData) {
float score = page.getScore();
for (ScoreDatum scoreDatum : inlinkedScoreData) {
LOG.trace("adding <" + scoreDatum.getUrl() + ", " + scoreDatum.getScore() + ">");
score += scoreDatum.getScore();
}
LOG.trace(url + ": " + score + " (" + page.getScore() + ")");
page.setScore(score);
ByteBuffer cashRaw = page.getMetadata().get(CASH_KEY);
float cash = 1.0f;
if (cashRaw != null) {
cash = Bytes.toFloat(cashRaw.array(), cashRaw.arrayOffset() + cashRaw.position());
}
page.getMetadata().put(CASH_KEY, ByteBuffer.wrap(Bytes.toBytes(cash + score)));
}
/**
* Set to 1.0f. The initial value should equal the injected value, and it should (obviously) be
* non-zero.
*/
@Override
public void initialScore(String url, WebPage row) throws ScoringFilterException {
row.setScore(1.0f);
row.getMetadata().put(CASH_KEY, ByteBuffer.wrap(Bytes.toBytes(1.0f)));
}
@Override
public void injectedScore(String url, WebPage row) throws ScoringFilterException {
float score = row.getScore();
row.getMetadata().put(CASH_KEY, ByteBuffer.wrap(Bytes.toBytes(score)));
}
