bdbworkqueue.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

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<TH ALIGN="left"><B>Methods inherited from interface java.lang.Comparable</B></TH>
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<TD><CODE>compareTo</CODE></TD>
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<A NAME="BdbWorkQueue(java.lang.String, org.archive.crawler.frontier.BdbFrontier)"><!-- --></A><H3>
BdbWorkQueue</H3>
<PRE>
public <B>BdbWorkQueue</B>(java.lang.String&nbsp;classKey,
                    <A HREF="../../../../org/archive/crawler/frontier/BdbFrontier.html" title="class in org.archive.crawler.frontier">BdbFrontier</A>&nbsp;frontier)</PRE>
<DL>
<DD>Create a virtual queue inside the given BdbMultipleWorkQueues
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>classKey</CODE> - </DL>
</DL>

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<A NAME="deleteMatchingFromQueue(org.archive.crawler.frontier.WorkQueueFrontier, java.lang.String)"><!-- --></A><H3>
deleteMatchingFromQueue</H3>
<PRE>
protected long <B>deleteMatchingFromQueue</B>(<A HREF="../../../../org/archive/crawler/frontier/WorkQueueFrontier.html" title="class in org.archive.crawler.frontier">WorkQueueFrontier</A>&nbsp;frontier,
                                       java.lang.String&nbsp;match)
                                throws java.io.IOException</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#deleteMatchingFromQueue(org.archive.crawler.frontier.WorkQueueFrontier, java.lang.String)">WorkQueue</A></CODE></B></DD>
<DD>Delete URIs matching the given pattern from this queue.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#deleteMatchingFromQueue(org.archive.crawler.frontier.WorkQueueFrontier, java.lang.String)">deleteMatchingFromQueue</A></CODE> in class <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html" title="class in org.archive.crawler.frontier">WorkQueue</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>frontier</CODE> - WorkQueues manager.<DD><CODE>match</CODE> - the pattern to match
<DT><B>Returns:</B><DD>count of deleted URIs
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there was a problem while deleting</DL>
</DD>
</DL>
<HR>

<A NAME="deleteItem(org.archive.crawler.frontier.WorkQueueFrontier, org.archive.crawler.datamodel.CrawlURI)"><!-- --></A><H3>
deleteItem</H3>
<PRE>
protected void <B>deleteItem</B>(<A HREF="../../../../org/archive/crawler/frontier/WorkQueueFrontier.html" title="class in org.archive.crawler.frontier">WorkQueueFrontier</A>&nbsp;frontier,
                          <A HREF="../../../../org/archive/crawler/datamodel/CrawlURI.html" title="class in org.archive.crawler.datamodel">CrawlURI</A>&nbsp;peekItem)
                   throws java.io.IOException</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#deleteItem(org.archive.crawler.frontier.WorkQueueFrontier, org.archive.crawler.datamodel.CrawlURI)">WorkQueue</A></CODE></B></DD>
<DD>Removes the given item from the queue.
 
 This is only used to remove the first item in the queue,
 so it is not necessary to implement a random-access queue.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#deleteItem(org.archive.crawler.frontier.WorkQueueFrontier, org.archive.crawler.datamodel.CrawlURI)">deleteItem</A></CODE> in class <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html" title="class in org.archive.crawler.frontier">WorkQueue</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>frontier</CODE> - Work queues manager.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there was a problem while deleting the item</DL>
</DD>
</DL>
<HR>

<A NAME="peekItem(org.archive.crawler.frontier.WorkQueueFrontier)"><!-- --></A><H3>
peekItem</H3>
<PRE>
protected <A HREF="../../../../org/archive/crawler/datamodel/CrawlURI.html" title="class in org.archive.crawler.datamodel">CrawlURI</A> <B>peekItem</B>(<A HREF="../../../../org/archive/crawler/frontier/WorkQueueFrontier.html" title="class in org.archive.crawler.frontier">WorkQueueFrontier</A>&nbsp;frontier)
                     throws java.io.IOException</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#peekItem(org.archive.crawler.frontier.WorkQueueFrontier)">WorkQueue</A></CODE></B></DD>
<DD>Returns first item from queue (does not delete)
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#peekItem(org.archive.crawler.frontier.WorkQueueFrontier)">peekItem</A></CODE> in class <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html" title="class in org.archive.crawler.frontier">WorkQueue</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The peeked item, or null
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there was a problem while peeking</DL>
</DD>
</DL>
<HR>

<A NAME="insertItem(org.archive.crawler.frontier.WorkQueueFrontier, org.archive.crawler.datamodel.CrawlURI)"><!-- --></A><H3>
insertItem</H3>
<PRE>
protected void <B>insertItem</B>(<A HREF="../../../../org/archive/crawler/frontier/WorkQueueFrontier.html" title="class in org.archive.crawler.frontier">WorkQueueFrontier</A>&nbsp;frontier,
                          <A HREF="../../../../org/archive/crawler/datamodel/CrawlURI.html" title="class in org.archive.crawler.datamodel">CrawlURI</A>&nbsp;curi)
                   throws java.io.IOException</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#insertItem(org.archive.crawler.frontier.WorkQueueFrontier, org.archive.crawler.datamodel.CrawlURI)">WorkQueue</A></CODE></B></DD>
<DD>Insert the given curi, whether it is already present or not.
 Hook for subclasses.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html#insertItem(org.archive.crawler.frontier.WorkQueueFrontier, org.archive.crawler.datamodel.CrawlURI)">insertItem</A></CODE> in class <CODE><A HREF="../../../../org/archive/crawler/frontier/WorkQueue.html" title="class in org.archive.crawler.frontier">WorkQueue</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>frontier</CODE> - WorkQueueFrontier.<DD><CODE>curi</CODE> - CrawlURI to insert.
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there was a problem while inserting the item</DL>
</DD>
</DL>
<HR>

<A NAME="getPrefixClassKey(byte[])"><!-- --></A><H3>
getPrefixClassKey</H3>
<PRE>
protected static java.lang.String <B>getPrefixClassKey</B>(byte[]&nbsp;byteArray)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>byteArray</CODE> - Byte array to get hex string of.
<DT><B>Returns:</B><DD>Hex string of passed in byte array (Used logging
 key-prefixes).</DL>
</DD>
</DL>
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