// yacyPeerActions.java
// -------------------------------------
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2005
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// 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
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
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package de.anomic.yacy;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import de.anomic.http.httpHeader;
import de.anomic.http.httpc;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.server.serverCore;
import de.anomic.server.serverDate;
import de.anomic.tools.disorderSet;
import de.anomic.yacy.yacySeed;
public class yacyPeerActions {
private yacySeedDB seedDB;
private plasmaSwitchboard sb;
private HashSet actions;
private HashMap userAgents;
private File superseedFile;
private String superseedURL;
public long juniorConnects;
public long seniorConnects;
public long principalConnects;
public long disconnects;
private int bootstrapLoadTimeout;
public yacyPeerActions(yacySeedDB seedDB, plasmaSwitchboard switchboard, File superseedFile, String superseedURL) {
this.seedDB = seedDB;
this.sb = switchboard;
this.actions = new HashSet();
this.userAgents = new HashMap();
this.superseedFile = superseedFile;
this.superseedURL = superseedURL;
this.superseedURL = superseedURL;
this.juniorConnects = 0;
this.seniorConnects = 0;
this.principalConnects = 0;
this.disconnects = 0;
this.bootstrapLoadTimeout = (int) switchboard.getConfigLong("bootstrapLoadTimeout", 6000);
}
public void deploy(yacyPeerAction action) {
actions.add(action);
}
public void updateMySeed() {
if (sb.getConfig("peerName", "anomic").equals("anomic")) {
// generate new peer name
sb.setConfig("peerName", yacySeed.makeDefaultPeerName());
}
seedDB.mySeed.put(yacySeed.NAME, sb.getConfig("peerName", "nameless"));
if ((serverCore.portForwardingEnabled) && (serverCore.portForwarding != null)) {
seedDB.mySeed.put(yacySeed.PORT, Integer.toString(serverCore.portForwarding.getPort()));
} else {
seedDB.mySeed.put(yacySeed.PORT, Integer.toString(serverCore.getPortNr(sb.getConfig("port", "8080"))));
}
long uptime = ((System.currentTimeMillis() - Long.parseLong(sb.getConfig("startupTime", "0"))) / 1000) / 60;
long uptimediff = uptime - Long.parseLong(sb.getConfig("lastseedcheckUptime", "0")); //TODO: Do not use the switchboard?
long indexedc = sb.getThread("80_indexing").getBusyCycles();
long indexedcdiff = indexedc - Long.parseLong(sb.getConfig("lastseedcheckIndexedc", "0"));
if( uptimediff > 5 || ((String)sb.getConfig("lastseedcheckUptime", "-1")).equals("-1") ){
sb.setConfig("lastseedcheckUptime", uptime);
sb.setConfig("lastseedcheckIndexedc", indexedc);
}
//the speed of indexing (pages/minute) of the peer
if(uptimediff<=0){
//no timedelta. we cannot calculate a new value
}else if(indexedcdiff<=0){
//no indexing in the time...
seedDB.mySeed.put(yacySeed.ISPEED, Long.toString(0));
}else{
//set the PPM
seedDB.mySeed.put(yacySeed.ISPEED, Long.toString(indexedcdiff / uptimediff));
}
seedDB.mySeed.put(yacySeed.UPTIME, Long.toString(uptime)); // the number of minutes that the peer is up in minutes/day (moving average MA30)
seedDB.mySeed.put(yacySeed.LCOUNT, Integer.toString(sb.urlPool.loadedURL.size())); // the number of links that the peer has stored (LURL's)
seedDB.mySeed.put(yacySeed.NCOUNT, Integer.toString(sb.urlPool.noticeURL.stackSize())); // the number of links that the peer has noticed, but not loaded (NURL's)
seedDB.mySeed.put(yacySeed.ICOUNT, Integer.toString(sb.cacheSizeMin())); // the minimum number of words that the peer has indexed (as it says)
seedDB.mySeed.put(yacySeed.SCOUNT, Integer.toString(seedDB.sizeConnected())); // the number of seeds that the peer has stored
seedDB.mySeed.put(yacySeed.CCOUNT, Double.toString(((int) ((seedDB.sizeConnected() + seedDB.sizeDisconnected() + seedDB.sizePotential()) * 60.0 / (uptime + 1.01)) * 100) / 100.0)); // the number of clients that the peer connects (as connects/hour)
seedDB.mySeed.put(yacySeed.VERSION, sb.getConfig("version", ""));
if (seedDB.mySeed.get(yacySeed.PEERTYPE,"").equals(yacySeed.PEERTYPE_PRINCIPAL)) {
// attach information about seed location
seedDB.mySeed.put("seedURL", sb.getConfig("seedURL", ""));
}
seedDB.mySeed.setFlagDirectConnect(true);
seedDB.mySeed.put(yacySeed.LASTSEEN, yacyCore.universalDateShortString(new Date()));
seedDB.mySeed.put(yacySeed.UTC, serverDate.UTCDiffString());
seedDB.mySeed.setFlagAcceptRemoteCrawl(sb.getConfig("crawlResponse", "").equals("true"));
seedDB.mySeed.setFlagAcceptRemoteIndex(sb.getConfig("allowReceiveIndex", "").equals("true"));
//mySeed.setFlagAcceptRemoteIndex(true);
}
public void saveMySeed() {
try {
seedDB.mySeed.save(seedDB.myOwnSeedFile);
} catch (IOException e) {}
}
public void loadSeedLists() {
// uses the superseed to initialize the database with known seeds
yacySeed ys;
String seedListFileURL;
URL url;
ArrayList seedList;
Iterator enu;
int lc;
int sc = seedDB.sizeConnected();
httpHeader header;
yacyCore.log.logInfo("BOOTSTRAP: " + sc + " seeds known from previous run");
// - load the superseed: a list of URLs
disorderSet superseed = loadSuperseed(superseedFile, superseedURL);
// - use the superseed to further fill up the seedDB
int ssc = 0;
for (int i = 0; i < superseed.size(); i++) {
if (Thread.currentThread().isInterrupted()) break;
seedListFileURL = (String) superseed.any();
if (
seedListFileURL.startsWith("http://") ||
seedListFileURL.startsWith("https://")
) {
// load the seed list
try {
httpHeader reqHeader = new httpHeader();
reqHeader.put(httpHeader.PRAGMA,"no-cache");
reqHeader.put(httpHeader.CACHE_CONTROL,"no-cache");
url = new URL(seedListFileURL);
header = httpc.whead(url, url.getHost(), this.bootstrapLoadTimeout, null, null, this.sb.remoteProxyConfig,reqHeader);
if ((header == null) || (header.lastModified() == null)) {
yacyCore.log.logInfo("BOOTSTRAP: seed-list URL " + seedListFileURL + " not available");
} else if ((header.age() > 86400000) && (ssc > 0)) {
yacyCore.log.logInfo("BOOTSTRAP: seed-list URL " + seedListFileURL + " too old (" + (header.age() / 86400000) + " days)");
} else {
ssc++;
seedList = httpc.wget(url, url.getHost(), this.bootstrapLoadTimeout, null, null, this.sb.remoteProxyConfig,reqHeader);
enu = seedList.iterator();
lc = 0;
while (enu.hasNext()) {
ys = yacySeed.genRemoteSeed((String) enu.next(), null, true);
if ((ys != null) && (ys.isProper() == null) &&
((seedDB.mySeed == null) || (seedDB.mySeed.hash != ys.hash))) {
if (connectPeer(ys, false)) lc++;
//seedDB.writeMap(ys.hash, ys.getMap(), "init");
//System.out.println("BOOTSTRAP: received peer " + ys.get(yacySeed.NAME, "anonymous") + "/" + ys.getAddress());
//lc++;
}
}
yacyCore.log.logInfo("BOOTSTRAP: " + lc + " seeds from seed-list URL " + seedListFileURL + ", AGE=" + (header.age() / 3600000) + "h");
}
} catch (Exception e) {
// this is when wget fails; may be because of missing internet connection
// we do nothing here and go silently over it
yacyCore.log.logSevere("BOOTSTRAP: failed to load seeds from seed-list URL " + seedListFileURL);
}
}
}
yacyCore.log.logInfo("BOOTSTRAP: " + (seedDB.sizeConnected() - sc) + " new seeds while bootstraping.");
}
private disorderSet loadSuperseed(File local, String url) {
// this returns a list of locations where seed list-files can be found
disorderSet supsee = new disorderSet();
String line;
// read in local file
int lc = 0;
BufferedReader br = null;
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(local)));
while ((line = br.readLine()) != null) {
line = line.trim();
//System.out.println("one line in file:" + line);
if (line.length() > 0) supsee.add(line);
}
br.close();
lc = supsee.size();
yacyCore.log.logInfo("BOOTSTRAP: " + lc + " seed-list URLs from superseed file " + local.toString());
} catch (IOException e) {
//e.printStackTrace();
supsee = new disorderSet();
yacyCore.log.logInfo("BOOTSTRAP: failed to load seed-list URLs from superseed file " + local.toString() + ": " + e.getMessage());
} finally {
if (br!=null)try{br.close();}catch(Exception e){}
}
// read in remote file from url
try {
URL u = new URL(url);
ArrayList remote = httpc.wget(u, u.getHost(), 5000, null, null, this.sb.remoteProxyConfig);
if ((remote != null) && (remote.size() > 0)) {
Iterator e = remote.iterator();
while (e.hasNext()) {
line = (String) e.next();
if (line != null) {
line = line.trim();
supsee.add(line);
}
}
}
yacyCore.log.logInfo("BOOTSTRAP: " + (supsee.size() - lc) + " seed-list URLs from superseed URL " + url);
} catch (Exception e) {
supsee = new disorderSet();
yacyCore.log.logInfo("BOOTSTRAP: failed to load seed-list URLs from superseed URL " + url + ": " + e.getMessage());
}
return supsee;
}
final synchronized private boolean connectPeer(yacySeed seed, boolean direct) {
// store a remote peer's seed
// returns true if the peer is new and previously unknown
String error;
if (seed == null) {
yacyCore.log.logSevere("connect: WRONG seed (NULL)");
return false;
} else if ((error = seed.isProper()) != null) {
yacyCore.log.logSevere("connect: WRONG seed (" + seed.getName() + "/" + seed.hash + "): " + error);
return false;
} else if ((seedDB.mySeed != null) && (seed.hash.equals(seedDB.mySeed.hash))) {
yacyCore.log.logInfo("connect: SELF reference " + seed.getAddress());
return false;
} else {
String peerType = seed.get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_VIRGIN);
// reject unqualified seeds
if ((peerType.equals(yacySeed.PEERTYPE_VIRGIN)) || (peerType.equals(yacySeed.PEERTYPE_JUNIOR))) {
yacyCore.log.logFine("connect: rejecting NOT QUALIFIED " + peerType + " seed " + seed.getName());
return false;
}
// we may store that seed, but still have different cases
if (seed.get(yacySeed.LASTSEEN, "").length() < 14) {
// hack for peers that do not have a LastSeen date
seed.put(yacySeed.LASTSEEN, "20040101000000");
}
// connection time
long nowUTC0Time = System.currentTimeMillis(); // is better to have this value in a variable for debugging
long ctimeUTC0 = seed.getLastSeenTime();
// maybe correct it slightly
/*
* if (ctime > yacyCore.universalTime()) { ctime = ((2 * ctime) +
* yacyCore.universalTime()) / 3; seed.put(yacySeed.LASTSEEN,
* yacyCore.shortFormatter.format(new Date(ctime))); }
*/
if (Math.abs(nowUTC0Time - ctimeUTC0) > 60 * 60 * 24 * 1000) {
// the new connection is out-of-age, we reject the connection
yacyCore.log.logFine("connect: rejecting out-dated peer '" + seed.getName() + "' from " + seed.getAddress() + "; nowUTC0=" + nowUTC0Time + ", seedUTC0=" + ctimeUTC0 + ", TimeDiff=" + serverDate.intervalToString(Math.abs(nowUTC0Time - ctimeUTC0)));
return false;
}
// disconnection time
long dtimeUTC0;
yacySeed disconnectedSeed = seedDB.getDisconnected(seed.hash);
if (disconnectedSeed == null) {
dtimeUTC0 = 0; // never disconnected: virtually disconnected maximum time ago
} else {
try {
dtimeUTC0 = yacyCore.shortFormatter.parse(disconnectedSeed.get("disconnected", "20040101000000")).getTime() - seed.getUTCDiff();
} catch (java.text.ParseException e) {
dtimeUTC0 = 0;
}
}
if (direct) {
// remember the moment
// Date applies the local UTC offset, which is wrong
// we correct that by subtracting the local offset and adding
// the remote offset.
seed.setLastSeenTime();
seed.setFlagDirectConnect(true);
} else {
// set connection flag
if (Math.abs(nowUTC0Time - ctimeUTC0) > 120000) seed.setFlagDirectConnect(false); // 2 minutes
}
// update latest version number
if (seed.getVersion() > yacyCore.latestVersion) yacyCore.latestVersion = seed.getVersion();
// prepare to update
if (disconnectedSeed != null) {
// if the indirect connect aims to announce a peer that we know
// has been disconnected then we compare the dates:
// if the new peer has a LastSeen date, and that date is before
// the disconnection date, then we ignore the new peer
if (!(direct)) {
if (ctimeUTC0 < dtimeUTC0) {
// the disconnection was later, we reject the connection
yacyCore.log.logFine("connect: rejecting disconnected peer '" + seed.getName() + "' from " + seed.getAddress());
return false;
}
}
// this is a return of a lost peer
yacyCore.log.logFine("connect: returned KNOWN " + peerType + " peer '" + seed.getName() + "' from " + seed.getAddress());
seedDB.addConnected(seed);
return true;
} else {
yacySeed connectedSeed = seedDB.getConnected(seed.hash);
if (connectedSeed != null) {
// the seed is known: this is an update
try {
// if the old LastSeen date is later then the other
// info, then we reject the info
if ((ctimeUTC0 < (yacyCore.shortFormatter.parse(connectedSeed.get(yacySeed.LASTSEEN, "20040101000000")).getTime() - connectedSeed.getUTCDiff() + serverDate.UTCDiff())) && (!(direct))) {
yacyCore.log.logFine("connect: rejecting old info about peer '" + seed.getName() + "'");
return false;
}
if (connectedSeed.getName() != seed.getName()) {
// TODO: update seed name lookup cache
}
} catch (java.text.ParseException e) {}
yacyCore.log.logFine("connect: updated KNOWN " + ((direct) ? "direct " : "") + peerType + " peer '" + seed.getName() + "' from " + seed.getAddress());
seedDB.addConnected(seed);
return true;
} else {
// the seed is new
if (seed.get(yacySeed.IP, "127.0.0.1").equals(seedDB.mySeed.get(yacySeed.IP, "127.0.0.1"))) {
// seed from the same IP as the calling client: can be
// the case if there runs another one over a NAT
yacyCore.log.logFine("connect: saved NEW seed (myself IP) " + seed.getAddress());
} else {
// completely new seed
yacyCore.log.logFine("connect: saved NEW " + peerType + " peer '" + seed.getName() + "' from " + seed.getAddress());
}
if (peerType.equals(yacySeed.PEERTYPE_SENIOR))
seniorConnects++; // update statistics
if (peerType.equals(yacySeed.PEERTYPE_PRINCIPAL))
principalConnects++; // update statistics
seedDB.addConnected(seed);
return true;
}
}
}
}
private final void disconnectPeer(yacySeed seed) {
// we do this if we did not get contact with the other peer
yacyCore.log.logFine("connect: no contact to a " + seed.get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_VIRGIN) + " peer '" + seed.getName() + "' at " + seed.getAddress());
synchronized (seedDB) {
if (!seedDB.hasDisconnected(seed.hash)) { disconnects++; }
seed.put("disconnected", yacyCore.universalDateShortString(new Date()));
seedDB.addDisconnected(seed); // update info
}
}
public boolean peerArrival(yacySeed peer, boolean direct) {
if (peer == null) return false;
boolean res = connectPeer(peer, direct);
// perform all actions if peer is effective new
if (res) {
Iterator i = actions.iterator();
while (i.hasNext()) ((yacyPeerAction) i.next()).processPeerArrival(peer, direct);
}
return res;
}
public void peerDeparture(yacySeed peer) {
if (peer == null) return;
//System.out.println("PEER DEPARTURE:" + peer.toString());
disconnectPeer(peer);
// perform all actions
Iterator i = actions.iterator();
while (i.hasNext()) ((yacyPeerAction) i.next()).processPeerDeparture(peer);
}
public void peerPing(yacySeed peer) {
if (peer == null) return;
// this is called only if the peer has junior status
seedDB.addPotential(peer);
// perform all actions
Iterator i = actions.iterator();
while (i.hasNext()) ((yacyPeerAction) i.next()).processPeerPing(peer);
}
public void setUserAgent(String IP, String userAgent) {
userAgents.put(IP, userAgent);
}
public String getUserAgent(String IP) {
String userAgent = (String) userAgents.get(IP);
return (userAgent == null) ? "" : userAgent;
}
}