You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
347 lines
14 KiB
347 lines
14 KiB
// NoticedURL.java
|
|
// -----------------------
|
|
// part of YaCy
|
|
// (C) by Michael Peter Christen; mc@yacy.net
|
|
// first published on http://www.anomic.de
|
|
// Frankfurt, Germany, 2004
|
|
//
|
|
//$LastChangedDate$
|
|
//$LastChangedRevision$
|
|
//$LastChangedBy$
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
// NURL - noticed (known but not loaded) URL's
|
|
|
|
package de.anomic.crawler;
|
|
|
|
import java.io.File;
|
|
import java.io.IOException;
|
|
import java.util.HashSet;
|
|
import java.util.Iterator;
|
|
import java.util.List;
|
|
import java.util.Map;
|
|
import java.util.Set;
|
|
|
|
import net.yacy.kelondro.index.HandleSet;
|
|
import net.yacy.kelondro.index.RowSpaceExceededException;
|
|
import net.yacy.kelondro.logging.Log;
|
|
import net.yacy.kelondro.order.Base64Order;
|
|
import de.anomic.crawler.retrieval.Request;
|
|
|
|
public class NoticedURL {
|
|
|
|
public enum StackType {
|
|
LOCAL, GLOBAL, OVERHANG, REMOTE, NOLOAD;
|
|
}
|
|
|
|
public static final long minimumLocalDeltaInit = 10; // the minimum time difference between access of the same local domain
|
|
public static final long minimumGlobalDeltaInit = 500; // the minimum time difference between access of the same global domain
|
|
|
|
private Balancer coreStack; // links found by crawling to depth-1
|
|
private Balancer limitStack; // links found by crawling at target depth
|
|
private Balancer remoteStack; // links from remote crawl orders
|
|
private Balancer noloadStack; // links that are not passed to a loader; the index will be generated from the Request entry
|
|
|
|
public NoticedURL(
|
|
final File cachePath,
|
|
final Set<String> myAgentIDs,
|
|
final boolean useTailCache,
|
|
final boolean exceed134217727) {
|
|
Log.logInfo("NoticedURL", "CREATING STACKS at " + cachePath.toString());
|
|
this.coreStack = new Balancer(cachePath, "urlNoticeCoreStack", minimumLocalDeltaInit, minimumGlobalDeltaInit, myAgentIDs, useTailCache, exceed134217727);
|
|
this.limitStack = new Balancer(cachePath, "urlNoticeLimitStack", minimumLocalDeltaInit, minimumGlobalDeltaInit, myAgentIDs, useTailCache, exceed134217727);
|
|
//overhangStack = new plasmaCrawlBalancer(overhangStackFile);
|
|
this.remoteStack = new Balancer(cachePath, "urlNoticeRemoteStack", minimumLocalDeltaInit, minimumGlobalDeltaInit, myAgentIDs, useTailCache, exceed134217727);
|
|
this.noloadStack = new Balancer(cachePath, "urlNoticeNoLoadStack", minimumLocalDeltaInit, minimumGlobalDeltaInit, myAgentIDs, useTailCache, exceed134217727);
|
|
}
|
|
|
|
public long getMinimumLocalDelta() {
|
|
return this.coreStack.getMinimumLocalDelta();
|
|
}
|
|
|
|
public long getMinimumGlobalDelta() {
|
|
return this.coreStack.getMinimumGlobalDelta();
|
|
}
|
|
|
|
public void setMinimumDelta(final long minimumLocalDelta, final long minimumGlobalDelta) {
|
|
this.coreStack.setMinimumDelta(minimumLocalDelta, minimumGlobalDelta);
|
|
this.limitStack.setMinimumDelta(minimumLocalDelta, minimumGlobalDelta);
|
|
this.remoteStack.setMinimumDelta(minimumLocalDelta, minimumGlobalDelta);
|
|
this.noloadStack.setMinimumDelta(minimumLocalDelta, minimumGlobalDelta);
|
|
}
|
|
|
|
public void clear() {
|
|
Log.logInfo("NoticedURL", "CLEARING ALL STACKS");
|
|
this.coreStack.clear();
|
|
this.limitStack.clear();
|
|
this.remoteStack.clear();
|
|
this.noloadStack.clear();
|
|
}
|
|
|
|
public void close() {
|
|
Log.logInfo("NoticedURL", "CLOSING ALL STACKS");
|
|
if (this.coreStack != null) {
|
|
this.coreStack.close();
|
|
this.coreStack = null;
|
|
}
|
|
if (this.limitStack != null) {
|
|
this.limitStack.close();
|
|
this.limitStack = null;
|
|
}
|
|
//overhangStack.close();
|
|
if (this.remoteStack != null) {
|
|
this.remoteStack.close();
|
|
this.remoteStack = null;
|
|
}
|
|
if (this.noloadStack != null) {
|
|
this.noloadStack.close();
|
|
this.noloadStack = null;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected void finalize() throws Throwable {
|
|
if ((this.coreStack != null) || (this.limitStack != null) || (this.remoteStack != null)) {
|
|
Log.logWarning("plasmaCrawlNURL", "NURL stack closed by finalizer");
|
|
close();
|
|
}
|
|
super.finalize();
|
|
}
|
|
|
|
public boolean notEmpty() {
|
|
return this.coreStack.notEmpty() || this.limitStack.notEmpty() || this.remoteStack.notEmpty() || this.noloadStack.notEmpty();
|
|
}
|
|
|
|
public boolean notEmptyLocal() {
|
|
return this.coreStack.notEmpty() || this.limitStack.notEmpty() || this.noloadStack.notEmpty();
|
|
}
|
|
|
|
public int size() {
|
|
// this does not count the overhang stack size
|
|
return ((this.coreStack == null) ? 0 : this.coreStack.size()) + ((this.limitStack == null) ? 0 : this.limitStack.size()) + ((this.remoteStack == null) ? 0 : this.remoteStack.size());
|
|
}
|
|
|
|
public boolean isEmpty() {
|
|
if (this.coreStack == null) return true;
|
|
if (!this.coreStack.isEmpty()) return false;
|
|
if (!this.limitStack.isEmpty()) return false;
|
|
if (!this.remoteStack.isEmpty()) return false;
|
|
if (!this.noloadStack.isEmpty()) return false;
|
|
return true;
|
|
}
|
|
|
|
public int stackSize(final StackType stackType) {
|
|
switch (stackType) {
|
|
case NOLOAD: return (this.noloadStack == null) ? 0 : this.noloadStack.size();
|
|
case LOCAL: return (this.coreStack == null) ? 0 : this.coreStack.size();
|
|
case GLOBAL: return (this.limitStack == null) ? 0 : this.limitStack.size();
|
|
case OVERHANG: return 0;
|
|
case REMOTE: return (this.remoteStack == null) ? 0 : this.remoteStack.size();
|
|
default: return -1;
|
|
}
|
|
}
|
|
|
|
public boolean existsInStack(final byte[] urlhashb) {
|
|
return
|
|
this.coreStack.has(urlhashb) ||
|
|
this.limitStack.has(urlhashb) ||
|
|
//overhangStack.has(urlhashb) ||
|
|
this.remoteStack.has(urlhashb) ||
|
|
this.noloadStack.has(urlhashb);
|
|
}
|
|
|
|
/**
|
|
* push a crawl request on one of the different crawl stacks
|
|
* @param stackType
|
|
* @param entry
|
|
* @return null if this was successful or a String explaining what went wrong in case of an error
|
|
*/
|
|
public String push(final StackType stackType, final Request entry) {
|
|
try {
|
|
switch (stackType) {
|
|
case LOCAL:
|
|
return this.coreStack.push(entry);
|
|
case GLOBAL:
|
|
return this.limitStack.push(entry);
|
|
case REMOTE:
|
|
return this.remoteStack.push(entry);
|
|
case NOLOAD:
|
|
return this.noloadStack.push(entry);
|
|
default:
|
|
return "stack type unknown";
|
|
}
|
|
} catch (final Exception er) {
|
|
Log.logException(er);
|
|
return "error pushing onto the crawl stack: " + er.getMessage();
|
|
}
|
|
}
|
|
|
|
public Request get(final byte[] urlhash) {
|
|
Request entry = null;
|
|
try {if ((entry = this.noloadStack.get(urlhash)) != null) return entry;} catch (final IOException e) {}
|
|
try {if ((entry = this.coreStack.get(urlhash)) != null) return entry;} catch (final IOException e) {}
|
|
try {if ((entry = this.limitStack.get(urlhash)) != null) return entry;} catch (final IOException e) {}
|
|
try {if ((entry = this.remoteStack.get(urlhash)) != null) return entry;} catch (final IOException e) {}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* remove a CrawlEntry by a given hash. Usage of this method is not encouraged,
|
|
* because the underlying data structure (crawl stacks) cannot handle removals very good.
|
|
* @param urlhash
|
|
* @return true, if the entry was removed; false if not
|
|
*/
|
|
public boolean removeByURLHash(final byte[] urlhashBytes) {
|
|
try {
|
|
final HandleSet urlHashes = new HandleSet(12, Base64Order.enhancedCoder, 1);
|
|
urlHashes.put(urlhashBytes);
|
|
boolean ret = false;
|
|
try {ret |= this.noloadStack.remove(urlHashes) > 0;} catch (final IOException e) {}
|
|
try {ret |= this.coreStack.remove(urlHashes) > 0;} catch (final IOException e) {}
|
|
try {ret |= this.limitStack.remove(urlHashes) > 0;} catch (final IOException e) {}
|
|
try {ret |= this.remoteStack.remove(urlHashes) > 0;} catch (final IOException e) {}
|
|
return ret;
|
|
} catch (final RowSpaceExceededException e) {
|
|
Log.logException(e);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public int removeByProfileHandle(final String handle, final long timeout) throws RowSpaceExceededException {
|
|
int removed = 0;
|
|
try {removed += this.noloadStack.removeAllByProfileHandle(handle, timeout);} catch (final IOException e) {}
|
|
try {removed += this.coreStack.removeAllByProfileHandle(handle, timeout);} catch (final IOException e) {}
|
|
try {removed += this.limitStack.removeAllByProfileHandle(handle, timeout);} catch (final IOException e) {}
|
|
try {removed += this.remoteStack.removeAllByProfileHandle(handle, timeout);} catch (final IOException e) {}
|
|
return removed;
|
|
}
|
|
|
|
/**
|
|
* get a list of domains that are currently maintained as domain stacks
|
|
* @return a map of clear text strings of host names to the size of the domain stacks
|
|
*/
|
|
public Map<String, Integer[]> getDomainStackHosts(final StackType stackType) {
|
|
switch (stackType) {
|
|
case LOCAL: return this.coreStack.getDomainStackHosts();
|
|
case GLOBAL: return this.limitStack.getDomainStackHosts();
|
|
case REMOTE: return this.remoteStack.getDomainStackHosts();
|
|
case NOLOAD: return this.noloadStack.getDomainStackHosts();
|
|
default: return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* get a list of domains that are currently maintained as domain stacks
|
|
* @return a collection of clear text strings of host names
|
|
*/
|
|
public long getDomainSleepTime(final StackType stackType, final CrawlSwitchboard cs, Request crawlEntry) {
|
|
switch (stackType) {
|
|
case LOCAL: return this.coreStack.getDomainSleepTime(cs, crawlEntry);
|
|
case GLOBAL: return this.limitStack.getDomainSleepTime(cs, crawlEntry);
|
|
case REMOTE: return this.remoteStack.getDomainSleepTime(cs, crawlEntry);
|
|
case NOLOAD: return this.noloadStack.getDomainSleepTime(cs, crawlEntry);
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* get lists of crawl request entries for a specific host
|
|
* @param host
|
|
* @param maxcount
|
|
* @return a list of crawl loader requests
|
|
*/
|
|
public List<Request> getDomainStackReferences(final StackType stackType, String host, int maxcount) {
|
|
switch (stackType) {
|
|
case LOCAL: return this.coreStack.getDomainStackReferences(host, maxcount);
|
|
case GLOBAL: return this.limitStack.getDomainStackReferences(host, maxcount);
|
|
case REMOTE: return this.remoteStack.getDomainStackReferences(host, maxcount);
|
|
case NOLOAD: return this.noloadStack.getDomainStackReferences(host, maxcount);
|
|
default: return null;
|
|
}
|
|
}
|
|
|
|
public Request pop(final StackType stackType, final boolean delay, final CrawlSwitchboard cs) throws IOException {
|
|
switch (stackType) {
|
|
case LOCAL: return pop(this.coreStack, delay, cs);
|
|
case GLOBAL: return pop(this.limitStack, delay, cs);
|
|
case REMOTE: return pop(this.remoteStack, delay, cs);
|
|
case NOLOAD: return pop(this.noloadStack, false, cs);
|
|
default: return null;
|
|
}
|
|
}
|
|
|
|
public void shift(final StackType fromStack, final StackType toStack, final CrawlSwitchboard cs) {
|
|
try {
|
|
final Request entry = pop(fromStack, false, cs);
|
|
if (entry != null) {
|
|
final String warning = push(toStack, entry);
|
|
if (warning != null) {
|
|
Log.logWarning("NoticedURL", "shift from " + fromStack + " to " + toStack + ": " + warning);
|
|
}
|
|
}
|
|
} catch (final IOException e) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
public void clear(final StackType stackType) {
|
|
Log.logInfo("NoticedURL", "CLEARING STACK " + stackType);
|
|
switch (stackType) {
|
|
case LOCAL: this.coreStack.clear(); break;
|
|
case GLOBAL: this.limitStack.clear(); break;
|
|
case REMOTE: this.remoteStack.clear(); break;
|
|
case NOLOAD: this.noloadStack.clear(); break;
|
|
default: return;
|
|
}
|
|
}
|
|
|
|
private Request pop(final Balancer balancer, final boolean delay, final CrawlSwitchboard cs) throws IOException {
|
|
// this is a filo - pop
|
|
int s;
|
|
Request entry;
|
|
int errors = 0;
|
|
synchronized (balancer) {
|
|
while ((s = balancer.size()) > 0) {
|
|
entry = balancer.pop(delay, cs);
|
|
if (entry == null) {
|
|
if (s > balancer.size()) continue;
|
|
errors++;
|
|
if (errors < 100) continue;
|
|
final int aftersize = balancer.size();
|
|
balancer.clear(); // the balancer is broken and cannot shrink
|
|
Log.logWarning("BALANCER", "entry is null, balancer cannot shrink (bevore pop = " + s + ", after pop = " + aftersize + "); reset of balancer");
|
|
}
|
|
return entry;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public Iterator<Request> iterator(final StackType stackType) {
|
|
// returns an iterator of plasmaCrawlBalancerEntry Objects
|
|
try {switch (stackType) {
|
|
case LOCAL: return this.coreStack.iterator();
|
|
case GLOBAL: return this.limitStack.iterator();
|
|
case REMOTE: return this.remoteStack.iterator();
|
|
case NOLOAD: return this.noloadStack.iterator();
|
|
default: return null;
|
|
}} catch (final IOException e) {
|
|
return new HashSet<Request>().iterator();
|
|
}
|
|
}
|
|
|
|
}
|