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workaround for IndexOutOfBoundsException in ResultURLs.getExecutorHash() seen @ CrawlResults.html?process=4

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git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4934 6c8d7289-2bf4-0310-a012-ef5d649a1542
pull/1/head
danielr 17 years ago
parent c998dc6556
commit 6a9cc29cdd
1 changed files with 225 additions and 55 deletions
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280
source/de/anomic/crawler/ResultURLs.java
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@ -52,10 +52,16 @@
package de.anomic.crawler;
import java.net.MalformedURLException;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import de.anomic.index.indexURLReference;
import de.anomic.kelondro.kelondroBitfield;
import de.anomic.server.logging.serverLog;
import de.anomic.yacy.yacySeedDB;
import de.anomic.yacy.yacyURL;
public final class ResultURLs {
@ -84,14 +90,18 @@ public final class ResultURLs {
assert executorHash != null;
if (e == null) { return; }
try {
switch (stackType) {
case 0: break;
case 1: externResultStack.add(e.hash() + initiatorHash + executorHash); break;
case 2: searchResultStack.add(e.hash() + initiatorHash + executorHash); break;
case 3: transfResultStack.add(e.hash() + initiatorHash + executorHash); break;
case 4: proxyResultStack.add(e.hash() + initiatorHash + executorHash); break;
case 5: lcrawlResultStack.add(e.hash() + initiatorHash + executorHash); break;
case 6: gcrawlResultStack.add(e.hash() + initiatorHash + executorHash); break;
// switch (stackType) {
// case 0: break;
// case 1: externResultStack.add(e.hash() + initiatorHash + executorHash); break;
// case 2: searchResultStack.add(e.hash() + initiatorHash + executorHash); break;
// case 3: transfResultStack.add(e.hash() + initiatorHash + executorHash); break;
// case 4: proxyResultStack.add(e.hash() + initiatorHash + executorHash); break;
// case 5: lcrawlResultStack.add(e.hash() + initiatorHash + executorHash); break;
// case 6: gcrawlResultStack.add(e.hash() + initiatorHash + executorHash); break;
// }
final List<String> resultStack = getStack(stackType);
if(resultStack != null) {
resultStack.add(e.hash() + initiatorHash + executorHash);
}
return;
} catch (Exception ex) {
@ -105,75 +115,182 @@ public final class ResultURLs {
}
public synchronized int getStackSize(int stack) {
switch (stack) {
case 1: return externResultStack.size();
case 2: return searchResultStack.size();
case 3: return transfResultStack.size();
case 4: return proxyResultStack.size();
case 5: return lcrawlResultStack.size();
case 6: return gcrawlResultStack.size();
final List<String> resultStack = getStack(stack);
if(resultStack != null) {
return resultStack.size();
} else {
return -1;
}
return -1;
// switch (stack) {
// case 1: return externResultStack.size();
// case 2: return searchResultStack.size();
// case 3: return transfResultStack.size();
// case 4: return proxyResultStack.size();
// case 5: return lcrawlResultStack.size();
// case 6: return gcrawlResultStack.size();
// }
// return -1;
}
public synchronized String getUrlHash(int stack, int pos) {
switch (stack) {
case 1: return (externResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
case 2: return (searchResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
case 3: return (transfResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
case 4: return (proxyResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
case 5: return (lcrawlResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
case 6: return (gcrawlResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
return getHashNo(stack, pos, 0);
// switch (stack) {
// case 1: return (externResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
// case 2: return (searchResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
// case 3: return (transfResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
// case 4: return (proxyResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
// case 5: return (lcrawlResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
// case 6: return (gcrawlResultStack.get(pos)).substring(0, yacySeedDB.commonHashLength);
// }
// return null;
}
public synchronized String getInitiatorHash(int stack, int pos) {
return getHashNo(stack, pos, 1);
// switch (stack) {
// case 1: return (externResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
// case 2: return (searchResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
// case 3: return (transfResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
// case 4: return (proxyResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
// case 5: return (lcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
// case 6: return (gcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
// }
// return null;
}
public synchronized String getExecutorHash(final int stack, int pos) {
return getHashNo(stack, pos, 2);
// switch (stack) {
// case 1: return (externResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
// case 2: return (searchResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
// case 3: return (transfResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
// case 4: return (proxyResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
// case 5: return (lcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
// case 6: return (gcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
// }
// return null;
}
/**
* gets the hash at <em>index</em> in element at <em>pos</em> in <em>stack</em> (based on {@link yacySeedDB#commonHashLength})
*
* <p>simplified example with {@link yacySeedDB#commonHashLength} = 3:</p>
* <code>String[][] stacks[1][0] = "123456789";
* System.out.println(getHashNo(1, 0, 0));
* System.out.println(getHashNo(1, 0, 0));
* System.out.println(getHashNo(1, 0, 0));</code>
* <p>Output:
* 123<br/>
* 456<br/>
* 789</p>
*
* @param stack
* @param pos
* @param index starting at 0
* @return
*/
public synchronized String getHashNo(final int stack, final int pos, final int index) {
final String result = getResultStackAt(stack, pos);
if(result != null) {
if(yacySeedDB.commonHashLength * 3 <= result.length()) {
return result.substring(yacySeedDB.commonHashLength * index, yacySeedDB.commonHashLength * (index + 1));
} else {
serverLog.logSevere("ResultURLs", "unexpected error: result of stack is too short: "+ result.length());
if(yacySeedDB.commonHashLength * 2 < result.length()) {
// return what is there
return result.substring(yacySeedDB.commonHashLength * 2);
} else {
return null;
}
}
} else if(isValidStack(stack)) {
serverLog.logSevere("ResultURLs", "unexpected error: result of stack is null: "+ stack +","+ pos);
}
return null;
}
public synchronized String getInitiatorHash(int stack, int pos) {
switch (stack) {
case 1: return (externResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
case 2: return (searchResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
case 3: return (transfResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
case 4: return (proxyResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
case 5: return (lcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
case 6: return (gcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength, yacySeedDB.commonHashLength * 2);
/**
* gets the element at pos in stack
*
* @param stack
* @param pos
* @return null if either stack or element do not exist
*/
private String getResultStackAt(final int stack, int pos) {
assert pos >= 0 : "precondition violated: " + pos + " >= 0";
final List<String> resultStack = getStack(stack);
if(resultStack != null) {
if(pos < resultStack.size()) {
return resultStack.get(pos);
} else {
serverLog.logSevere("ResultURLs", "unexpected error: Index out of Bounds "+ pos +" of "+ resultStack.size());
}
}
return null;
}
public synchronized String getExecutorHash(int stack, int pos) {
/**
* returns the stack indentified by the id <em>stack</em>
*
* @param stack id of resultStack
* @return null if stack does not exist (id is unknown or stack is null (which should not occur and an error is logged))
*/
private List<String> getStack(final int stack) {
switch (stack) {
case 1: return (externResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
case 2: return (searchResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
case 3: return (transfResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
case 4: return (proxyResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
case 5: return (lcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
case 6: return (gcrawlResultStack.get(pos)).substring(yacySeedDB.commonHashLength * 2, yacySeedDB.commonHashLength * 3);
case 1: return externResultStack;
case 2: return searchResultStack;
case 3: return transfResultStack;
case 4: return proxyResultStack;
case 5: return lcrawlResultStack;
case 6: return gcrawlResultStack;
default:
return null;
}
return null;
}
/**
* tests if a stack with id <em>stack</em> exists
*
* @param stack
* @return
*/
private boolean isValidStack(final int stack) {
return getStack(stack) != null;
}
public synchronized boolean removeStack(int stack, int pos) {
Object prevElement = null;
switch (stack) {
case 1: prevElement = externResultStack.remove(pos); break;
case 2: prevElement = searchResultStack.remove(pos); break;
case 3: prevElement = transfResultStack.remove(pos); break;
case 4: prevElement = proxyResultStack.remove(pos); break;
case 5: prevElement = lcrawlResultStack.remove(pos); break;
case 6: prevElement = gcrawlResultStack.remove(pos); break;
// Object prevElement = null;
// switch (stack) {
// case 1: prevElement = externResultStack.remove(pos); break;
// case 2: prevElement = searchResultStack.remove(pos); break;
// case 3: prevElement = transfResultStack.remove(pos); break;
// case 4: prevElement = proxyResultStack.remove(pos); break;
// case 5: prevElement = lcrawlResultStack.remove(pos); break;
// case 6: prevElement = gcrawlResultStack.remove(pos); break;
// }
// return prevElement != null;
final List<String> resultStack = getStack(stack);
if(resultStack != null) {
return resultStack.remove(pos) != null;
} else {
return false;
}
return prevElement != null;
}
public synchronized void clearStack(int stack) {
switch (stack) {
case 1: externResultStack.clear(); break;
case 2: searchResultStack.clear(); break;
case 3: transfResultStack.clear(); break;
case 4: proxyResultStack.clear(); break;
case 5: lcrawlResultStack.clear(); break;
case 6: gcrawlResultStack.clear(); break;
final List<String> resultStack = getStack(stack);
if(resultStack != null) {
resultStack.clear();
}
// switch (stack) {
// case 1: externResultStack.clear(); break;
// case 2: searchResultStack.clear(); break;
// case 3: transfResultStack.clear(); break;
// case 4: proxyResultStack.clear(); break;
// case 5: lcrawlResultStack.clear(); break;
// case 6: gcrawlResultStack.clear(); break;
// }
}
public synchronized boolean remove(String urlHash) {
@ -188,5 +305,58 @@ public final class ResultURLs {
}
return true;
}
/**
* test and benchmark
* @param args
*/
public static void main(String[] args) {
final ResultURLs results = new ResultURLs();
try {
final yacyURL url = new yacyURL("http", "www.yacy.net", 80, "/");
final indexURLReference urlRef = new indexURLReference(url, "YaCy Homepage", "", "", "", new Date(), new Date(), new Date(), "", new byte[] {}, 123, 42, '?', new kelondroBitfield(), "de", 0, 0, 0, 0, 0, 0);
int stackNo = 1;
System.out.println("valid test:\n=======");
// add
results.stack(urlRef, urlRef.hash(), url.hash(), stackNo);
// size
System.out.println("size of stack:\t"+ results.getStackSize(stackNo));
// get
System.out.println("url hash:\t"+ results.getUrlHash(stackNo, 0));
System.out.println("executor hash:\t"+ results.getExecutorHash(stackNo, 0));
System.out.println("initiator hash:\t"+ results.getInitiatorHash(stackNo, 0));
// test errors
System.out.println("invalid test:\n=======");
// get
System.out.println("url hash:\t"+ results.getUrlHash(stackNo, 1));
System.out.println("executor hash:\t"+ results.getExecutorHash(stackNo, 1));
System.out.println("initiator hash:\t"+ results.getInitiatorHash(stackNo, 1));
stackNo = 42;
System.out.println("size of stack:\t"+ results.getStackSize(stackNo));
// get
System.out.println("url hash:\t"+ results.getUrlHash(stackNo, 0));
System.out.println("executor hash:\t"+ results.getExecutorHash(stackNo, 0));
System.out.println("initiator hash:\t"+ results.getInitiatorHash(stackNo, 0));
// benchmark
final long start = System.currentTimeMillis();
for(int i = 0; i < 1000000; i++) {
stackNo = i % 6;
// add
results.stack(urlRef, urlRef.hash(), url.hash(), stackNo);
// size
results.getStackSize(stackNo);
// get
for(int j = 0; j < 10; j++) {
results.getUrlHash(stackNo, i / 6);
results.getExecutorHash(stackNo, i / 6);
results.getInitiatorHash(stackNo, i / 6);
}
}
System.out.println("benschmark: "+ (System.currentTimeMillis() - start) + " ms");
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
}

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