This was made to make it possible that RWI selections can be serialized with indexing. Serialization will be implemented in another step. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1698 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
orbiter
19 years ago
parent
e3dd67bba0
commit
cd41e9a0eb
@ -0,0 +1,227 @@
|
||||
package de.anomic.plasma;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.util.ArrayList;
|
||||
import java.util.HashMap;
|
||||
import java.util.Iterator;
|
||||
|
||||
import de.anomic.kelondro.kelondroBase64Order;
|
||||
import de.anomic.kelondro.kelondroException;
|
||||
import de.anomic.server.serverCodings;
|
||||
import de.anomic.server.logging.serverLog;
|
||||
import de.anomic.yacy.yacyCore;
|
||||
import de.anomic.yacy.yacyDHTAction;
|
||||
import de.anomic.yacy.yacySeedDB;
|
||||
|
||||
public class plasmaDHTChunk {
|
||||
|
||||
public static final int chunkStatus_UNDEFINED = -1;
|
||||
public static final int chunkStatus_FAILED = 0;
|
||||
public static final int chunkStatus_FILLED = 1;
|
||||
public static final int chunkStatus_RUNNING = 2;
|
||||
public static final int chunkStatus_INTERRUPTED = 3;
|
||||
public static final int chunkStatus_COMPLETE = 4;
|
||||
|
||||
private plasmaWordIndex wordIndex;
|
||||
private serverLog log;
|
||||
private plasmaCrawlLURL lurls;
|
||||
|
||||
private int status = chunkStatus_UNDEFINED;
|
||||
private String startPointHash;
|
||||
private plasmaWordIndexEntryContainer[] indexContainers = null;
|
||||
private HashMap urlCache; // String (url-hash) / plasmaCrawlLURL.Entry
|
||||
private int idxCount;
|
||||
|
||||
public plasmaWordIndexEntryContainer firstContainer() {
|
||||
return indexContainers[0];
|
||||
}
|
||||
|
||||
public plasmaWordIndexEntryContainer lastContainer() {
|
||||
return indexContainers[indexContainers.length - 1];
|
||||
}
|
||||
|
||||
public plasmaWordIndexEntryContainer[] containers() {
|
||||
return indexContainers;
|
||||
}
|
||||
|
||||
public int containerSize() {
|
||||
return indexContainers.length;
|
||||
}
|
||||
|
||||
public int indexCount() {
|
||||
return this.idxCount;
|
||||
}
|
||||
|
||||
private int indexCounter() {
|
||||
int c = 0;
|
||||
for (int i = 0; i < indexContainers.length; i++) {
|
||||
c += indexContainers[i].size();
|
||||
}
|
||||
return c;
|
||||
}
|
||||
|
||||
public HashMap urlCacheMap() {
|
||||
return urlCache;
|
||||
}
|
||||
|
||||
public int getStatus() {
|
||||
return this.status;
|
||||
}
|
||||
|
||||
public plasmaDHTChunk(serverLog log, plasmaWordIndex wordIndex, plasmaCrawlLURL lurls, int minCount, int maxCount) {
|
||||
this.log = log;
|
||||
this.wordIndex = wordIndex;
|
||||
this.lurls = lurls;
|
||||
startPointHash = selectTransferStart();
|
||||
log.logFine("Selected hash " + startPointHash + " as start point for index distribution, distance = " + yacyDHTAction.dhtDistance(yacyCore.seedDB.mySeed.hash, startPointHash));
|
||||
selectTransferContainers(startPointHash, minCount, maxCount);
|
||||
|
||||
// count the indexes, can be smaller as expected
|
||||
this.idxCount = indexCounter();
|
||||
if (idxCount < minCount) {
|
||||
log.logFine("Too few (" + idxCount + ") indexes selected for transfer.");
|
||||
this.status = chunkStatus_FAILED;
|
||||
}
|
||||
}
|
||||
|
||||
public plasmaDHTChunk(serverLog log, plasmaWordIndex wordIndex, plasmaCrawlLURL lurls, int minCount, int maxCount, String startHash) {
|
||||
this.log = log;
|
||||
this.wordIndex = wordIndex;
|
||||
this.lurls = lurls;
|
||||
log.logFine("Demanded hash " + startHash + " as start point for index distribution, distance = " + yacyDHTAction.dhtDistance(yacyCore.seedDB.mySeed.hash, startPointHash));
|
||||
selectTransferContainers(startHash, minCount, maxCount);
|
||||
|
||||
// count the indexes, can be smaller as expected
|
||||
this.idxCount = indexCounter();
|
||||
if (idxCount < minCount) {
|
||||
log.logFine("Too few (" + idxCount + ") indexes selected for transfer.");
|
||||
this.status = chunkStatus_FAILED;
|
||||
}
|
||||
}
|
||||
|
||||
private String selectTransferStart() {
|
||||
String startPointHash;
|
||||
// first try to select with increasing probality a good start point
|
||||
if (Math.round(Math.random() * 6) != 4)
|
||||
for (int i = 9; i > 0; i--) {
|
||||
startPointHash = kelondroBase64Order.enhancedCoder.encode(serverCodings.encodeMD5Raw(Long.toString(i + System.currentTimeMillis()))).substring(2, 2 + yacySeedDB.commonHashLength);
|
||||
if (yacyDHTAction.dhtDistance(yacyCore.seedDB.mySeed.hash, startPointHash) > ((double) i / (double) 10))
|
||||
return startPointHash;
|
||||
}
|
||||
// if that fails, take simply the best start point (this is usually avoided, since that leads to always the same target peers)
|
||||
startPointHash = yacyCore.seedDB.mySeed.hash.substring(0, 11) + "z";
|
||||
return startPointHash;
|
||||
}
|
||||
|
||||
private void selectTransferContainers(String hash, int mincount, int maxcount) {
|
||||
int refcountRAM = selectTransferContainersResource(hash, plasmaWordIndex.RL_RAMCACHE, maxcount);
|
||||
if (refcountRAM >= mincount) {
|
||||
log.logFine("DHT selection from RAM: " + refcountRAM + " entries");
|
||||
return;
|
||||
}
|
||||
int refcountFile = selectTransferContainersResource(hash, plasmaWordIndex.RL_WORDFILES, maxcount);
|
||||
log.logFine("DHT selection from FILE: " + refcountFile + " entries, RAM provided only " + refcountRAM + " entries");
|
||||
return;
|
||||
}
|
||||
|
||||
private int selectTransferContainersResource(String hash, int resourceLevel, int maxcount) {
|
||||
// the hash is a start hash from where the indexes are picked
|
||||
ArrayList tmpContainers = new ArrayList(maxcount);
|
||||
String nexthash = "";
|
||||
try {
|
||||
Iterator wordHashIterator = wordIndex.wordHashes(hash, resourceLevel, true);
|
||||
plasmaWordIndexEntryContainer indexContainer;
|
||||
Iterator urlIter;
|
||||
plasmaWordIndexEntry indexEntry;
|
||||
plasmaCrawlLURL.Entry lurl;
|
||||
int refcount = 0;
|
||||
|
||||
urlCache = new HashMap();
|
||||
while ((maxcount > refcount) && (wordHashIterator.hasNext()) && ((nexthash = (String) wordHashIterator.next()) != null) && (nexthash.trim().length() > 0)
|
||||
&& ((tmpContainers.size() == 0) || (yacyDHTAction.dhtDistance(nexthash, ((plasmaWordIndexEntryContainer) tmpContainers.get(0)).wordHash()) < 0.2))) {
|
||||
// make an on-the-fly entity and insert values
|
||||
indexContainer = wordIndex.getContainer(nexthash, true, 10000);
|
||||
int notBoundCounter = 0;
|
||||
try {
|
||||
urlIter = indexContainer.entries();
|
||||
// iterate over indexes to fetch url entries and store them in the urlCache
|
||||
while ((urlIter.hasNext()) && (maxcount > refcount)) {
|
||||
indexEntry = (plasmaWordIndexEntry) urlIter.next();
|
||||
try {
|
||||
lurl = lurls.getEntry(indexEntry.getUrlHash(), indexEntry);
|
||||
if ((lurl == null) || (lurl.url() == null)) {
|
||||
notBoundCounter++;
|
||||
urlIter.remove();
|
||||
wordIndex.removeEntries(nexthash, new String[] { indexEntry.getUrlHash() }, true);
|
||||
} else {
|
||||
urlCache.put(indexEntry.getUrlHash(), lurl);
|
||||
refcount++;
|
||||
}
|
||||
} catch (IOException e) {
|
||||
notBoundCounter++;
|
||||
urlIter.remove();
|
||||
wordIndex.removeEntries(nexthash, new String[] { indexEntry.getUrlHash() }, true);
|
||||
}
|
||||
}
|
||||
|
||||
// remove all remaining; we have enough
|
||||
while (urlIter.hasNext()) {
|
||||
indexEntry = (plasmaWordIndexEntry) urlIter.next();
|
||||
urlIter.remove();
|
||||
}
|
||||
|
||||
// use whats left
|
||||
log.logFine("Selected partial index (" + indexContainer.size() + " from " + wordIndex.indexSize(nexthash) + " URLs, " + notBoundCounter + " not bound) for word " + indexContainer.wordHash());
|
||||
tmpContainers.add(indexContainer);
|
||||
} catch (kelondroException e) {
|
||||
log.logSevere("plasmaWordIndexDistribution/2: deleted DB for word " + nexthash, e);
|
||||
wordIndex.deleteIndex(nexthash);
|
||||
}
|
||||
}
|
||||
// create result
|
||||
indexContainers = (plasmaWordIndexEntryContainer[]) tmpContainers.toArray(new plasmaWordIndexEntryContainer[tmpContainers.size()]);
|
||||
|
||||
if ((indexContainers == null) || (indexContainers.length == 0)) {
|
||||
log.logFine("No index available for index transfer, hash start-point " + startPointHash);
|
||||
this.status = chunkStatus_FAILED;
|
||||
return 0;
|
||||
}
|
||||
|
||||
this.status = chunkStatus_FILLED;
|
||||
|
||||
return refcount;
|
||||
} catch (kelondroException e) {
|
||||
log.logSevere("selectTransferIndexes database corrupted: " + e.getMessage(), e);
|
||||
indexContainers = new plasmaWordIndexEntryContainer[0];
|
||||
urlCache = new HashMap();
|
||||
|
||||
this.status = chunkStatus_FAILED;
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
public int deleteTransferIndexes() {
|
||||
Iterator urlIter;
|
||||
plasmaWordIndexEntry indexEntry;
|
||||
String[] urlHashes;
|
||||
int count = 0;
|
||||
synchronized (wordIndex) {
|
||||
for (int i = 0; i < this.indexContainers.length; i++) {
|
||||
// delete entries separately
|
||||
int c = 0;
|
||||
urlHashes = new String[this.indexContainers[i].size()];
|
||||
urlIter = this.indexContainers[i].entries();
|
||||
while (urlIter.hasNext()) {
|
||||
indexEntry = (plasmaWordIndexEntry) urlIter.next();
|
||||
urlHashes[c++] = indexEntry.getUrlHash();
|
||||
}
|
||||
count += wordIndex.removeEntries(this.indexContainers[i].wordHash(), urlHashes, true);
|
||||
log.logFine("Deleted partial index (" + c + " URLs) for word " + this.indexContainers[i].wordHash() + "; " + this.wordIndex.indexSize(indexContainers[i].wordHash()) + " entries left");
|
||||
this.indexContainers[i] = null;
|
||||
}
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in new issue