writerpoolprocessor.html

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<a name="350" href="#350">350</a>     }
<a name="351" href="#351">351</a> 
<a name="352" href="#352">352</a>     <em>/**<em>*</em></em>
<a name="353" href="#353">353</a> <em>     * @return Returns the poolMaximumWait.</em>
<a name="354" href="#354">354</a> <em>     */</em>
<a name="355" href="#355">355</a>     <strong>public</strong> <strong>int</strong> getPoolMaximumWait() {
<a name="356" href="#356">356</a>         Object obj = getAttributeUnchecked(ATTR_POOL_MAX_WAIT);
<a name="357" href="#357">357</a>         <strong>return</strong> (obj == <strong>null</strong>)? WriterPool.DEFAULT_MAXIMUM_WAIT:
<a name="358" href="#358">358</a>             ((Integer)obj).intValue();
<a name="359" href="#359">359</a>     }
<a name="360" href="#360">360</a> 
<a name="361" href="#361">361</a>     <strong>public</strong> String getSuffix() {
<a name="362" href="#362">362</a>         Object obj = getAttributeUnchecked(ATTR_SUFFIX);
<a name="363" href="#363">363</a>         String sfx = (obj == <strong>null</strong>)?
<a name="364" href="#364">364</a>             WriterPoolMember.DEFAULT_SUFFIX: (String)obj;
<a name="365" href="#365">365</a>         <strong>if</strong> (sfx != <strong>null</strong> &amp;&amp; sfx.trim().
<a name="366" href="#366">366</a>                 equals(WriterPoolMember.HOSTNAME_VARIABLE)) {
<a name="367" href="#367">367</a>             String str = <span class="string">"localhost.localdomain"</span>;
<a name="368" href="#368">368</a>             <strong>try</strong> {
<a name="369" href="#369">369</a>                 str = InetAddress.getLocalHost().getHostName();
<a name="370" href="#370">370</a>             } <strong>catch</strong> (UnknownHostException ue) {
<a name="371" href="#371">371</a>                 logger.severe(<span class="string">"Failed getHostAddress for this host: "</span> + ue);
<a name="372" href="#372">372</a>             }
<a name="373" href="#373">373</a>             sfx = str;
<a name="374" href="#374">374</a>         }
<a name="375" href="#375">375</a>         <strong>return</strong> sfx;
<a name="376" href="#376">376</a>     }
<a name="377" href="#377">377</a>     
<a name="378" href="#378">378</a>     <strong>public</strong> <strong>long</strong> getMaxToWrite() {
<a name="379" href="#379">379</a>         Object obj = getAttributeUnchecked(ATTR_MAX_BYTES_WRITTEN);
<a name="380" href="#380">380</a>         <strong>return</strong> (obj == <strong>null</strong>)? 0: ((Long)obj).longValue();
<a name="381" href="#381">381</a>     }
<a name="382" href="#382">382</a> 
<a name="383" href="#383">383</a> 	<strong>public</strong> <strong>void</strong> crawlEnding(String sExitMessage) {
<a name="384" href="#384">384</a> 		<strong>this</strong>.pool.close();
<a name="385" href="#385">385</a> 	}
<a name="386" href="#386">386</a> 
<a name="387" href="#387">387</a> 	<strong>public</strong> <strong>void</strong> crawlEnded(String sExitMessage) {
<a name="388" href="#388">388</a>         <em class="comment">// sExitMessage is unused.</em>
<a name="389" href="#389">389</a> 	}
<a name="390" href="#390">390</a> 
<a name="391" href="#391">391</a>     <em class="comment">/*<em class="comment"> (non-Javadoc)</em></em>
<a name="392" href="#392">392</a> <em class="comment">     * @see org.archive.crawler.event.CrawlStatusListener#crawlStarted(java.lang.String)</em>
<a name="393" href="#393">393</a> <em class="comment">     */</em>
<a name="394" href="#394">394</a>     <strong>public</strong> <strong>void</strong> crawlStarted(String message) {
<a name="395" href="#395">395</a>         <em class="comment">// TODO Auto-generated method stub</em>
<a name="396" href="#396">396</a>     }
<a name="397" href="#397">397</a>     
<a name="398" href="#398">398</a>     <strong>protected</strong> String getCheckpointStateFile() {
<a name="399" href="#399">399</a>     	<strong>return</strong> <strong>this</strong>.getClass().getName() + <span class="string">".state"</span>;
<a name="400" href="#400">400</a>     }
<a name="401" href="#401">401</a>     
<a name="402" href="#402">402</a>     <strong>public</strong> <strong>void</strong> crawlCheckpoint(File checkpointDir) throws IOException {
<a name="403" href="#403">403</a>         <strong>int</strong> serial = getSerialNo().get();
<a name="404" href="#404">404</a>         <strong>if</strong> (<strong>this</strong>.pool.getNumActive() > 0) {
<a name="405" href="#405">405</a>             <em class="comment">// If we have open active Archive files, up the serial number</em>
<a name="406" href="#406">406</a>             <em class="comment">// so after checkpoint, we start at one past current number and</em>
<a name="407" href="#407">407</a>             <em class="comment">// so the number we serialize, is one past current serialNo.</em>
<a name="408" href="#408">408</a>             <em class="comment">// All this serial number manipulation should be fine in here since</em>
<a name="409" href="#409">409</a>             <em class="comment">// we're paused checkpointing (Revisit if this assumption changes).</em>
<a name="410" href="#410">410</a>             serial = getSerialNo().incrementAndGet();
<a name="411" href="#411">411</a>         }
<a name="412" href="#412">412</a>         saveCheckpointSerialNumber(checkpointDir, serial);
<a name="413" href="#413">413</a>         <em class="comment">// Close all ARCs on checkpoint.</em>
<a name="414" href="#414">414</a>         <strong>try</strong> {
<a name="415" href="#415">415</a>             <strong>this</strong>.pool.close();
<a name="416" href="#416">416</a>         } <strong>finally</strong> {
<a name="417" href="#417">417</a>             <em class="comment">// Reopen on checkpoint.</em>
<a name="418" href="#418">418</a>             setupPool(<strong>new</strong> AtomicInteger(serial));
<a name="419" href="#419">419</a>         }
<a name="420" href="#420">420</a>     }
<a name="421" href="#421">421</a>     
<a name="422" href="#422">422</a> 	<strong>public</strong> <strong>void</strong> crawlPausing(String statusMessage) {
<a name="423" href="#423">423</a>         <em class="comment">// sExitMessage is unused.</em>
<a name="424" href="#424">424</a> 	}
<a name="425" href="#425">425</a> 
<a name="426" href="#426">426</a> 	<strong>public</strong> <strong>void</strong> crawlPaused(String statusMessage) {
<a name="427" href="#427">427</a>         <em class="comment">// sExitMessage is unused.</em>
<a name="428" href="#428">428</a> 	}
<a name="429" href="#429">429</a> 
<a name="430" href="#430">430</a> 	<strong>public</strong> <strong>void</strong> crawlResuming(String statusMessage) {
<a name="431" href="#431">431</a>         <em class="comment">// sExitMessage is unused.</em>
<a name="432" href="#432">432</a> 	}
<a name="433" href="#433">433</a> 	
<a name="434" href="#434">434</a>     <strong>private</strong> <strong>void</strong> readObject(ObjectInputStream stream)
<a name="435" href="#435">435</a>     throws IOException, ClassNotFoundException {
<a name="436" href="#436">436</a>         stream.defaultReadObject();
<a name="437" href="#437">437</a>         <a href="../../../../org/archive/io/ObjectPlusFilesInputStream.html">ObjectPlusFilesInputStream</a> coistream =
<a name="438" href="#438">438</a>             (<a href="../../../../org/archive/io/ObjectPlusFilesInputStream.html">ObjectPlusFilesInputStream</a>)stream;
<a name="439" href="#439">439</a>         coistream.registerFinishTask( <strong>new</strong> Runnable() {
<a name="440" href="#440">440</a>             <strong>public</strong> <strong>void</strong> run() {
<a name="441" href="#441">441</a>             	setupPool(<strong>new</strong> AtomicInteger());
<a name="442" href="#442">442</a>             }
<a name="443" href="#443">443</a>         });
<a name="444" href="#444">444</a>     }
<a name="445" href="#445">445</a> 
<a name="446" href="#446">446</a> 	<strong>protected</strong> <a href="../../../../org/archive/io/WriterPool.html">WriterPool</a> getPool() {
<a name="447" href="#447">447</a> 		<strong>return</strong> pool;
<a name="448" href="#448">448</a> 	}
<a name="449" href="#449">449</a> 
<a name="450" href="#450">450</a> 	<strong>protected</strong> <strong>void</strong> setPool(<a href="../../../../org/archive/io/WriterPool.html">WriterPool</a> pool) {
<a name="451" href="#451">451</a> 		<strong>this</strong>.pool = pool;
<a name="452" href="#452">452</a> 	}
<a name="453" href="#453">453</a> 
<a name="454" href="#454">454</a> 	<strong>protected</strong> <strong>long</strong> getTotalBytesWritten() {
<a name="455" href="#455">455</a> 		<strong>return</strong> totalBytesWritten;
<a name="456" href="#456">456</a> 	}
<a name="457" href="#457">457</a> 
<a name="458" href="#458">458</a> 	<strong>protected</strong> <strong>void</strong> setTotalBytesWritten(<strong>long</strong> totalBytesWritten) {
<a name="459" href="#459">459</a>         <strong>this</strong>.totalBytesWritten = totalBytesWritten;
<a name="460" href="#460">460</a>     }
<a name="461" href="#461">461</a> 	
<a name="462" href="#462">462</a>     <em>/**<em>*</em></em>
<a name="463" href="#463">463</a> <em>     * Called out of {@link #initialTasks()} when recovering a checkpoint.</em>
<a name="464" href="#464">464</a> <em>     * Restore state.</em>
<a name="465" href="#465">465</a> <em>     */</em>
<a name="466" href="#466">466</a>     <strong>protected</strong> <strong>void</strong> checkpointRecover() {
<a name="467" href="#467">467</a>         <strong>int</strong> serialNo = loadCheckpo<strong>int</strong>SerialNumber();
<a name="468" href="#468">468</a>         <strong>if</strong> (serialNo != -1) {
<a name="469" href="#469">469</a>             getSerialNo().set(serialNo);
<a name="470" href="#470">470</a>         }
<a name="471" href="#471">471</a>     }
<a name="472" href="#472">472</a> 
<a name="473" href="#473">473</a>     <em>/**<em>*</em></em>
<a name="474" href="#474">474</a> <em>     * @return Serial number from checkpoint state file or if unreadable, -1</em>
<a name="475" href="#475">475</a> <em>     * (Client should check for -1).</em>
<a name="476" href="#476">476</a> <em>     */</em>
<a name="477" href="#477">477</a>     <strong>protected</strong> <strong>int</strong> loadCheckpo<strong>int</strong>SerialNumber() {
<a name="478" href="#478">478</a>         <strong>int</strong> result = -1;
<a name="479" href="#479">479</a>         
<a name="480" href="#480">480</a>         <em class="comment">// If in recover mode, read in the Writer serial number saved</em>
<a name="481" href="#481">481</a>         <em class="comment">// off when we checkpointed.</em>
<a name="482" href="#482">482</a>         File stateFile = <strong>new</strong> File(getSettingsHandler().getOrder()
<a name="483" href="#483">483</a>                 .getController().getCheckpointRecover().getDirectory(),
<a name="484" href="#484">484</a>                 getCheckpointStateFile());
<a name="485" href="#485">485</a>         <strong>if</strong> (!stateFile.exists()) {
<a name="486" href="#486">486</a>             logger.info(stateFile.getAbsolutePath()
<a name="487" href="#487">487</a>                     + <span class="string">" doesn't exist so cannot restore Writer serial number."</span>);
<a name="488" href="#488">488</a>         } <strong>else</strong> {
<a name="489" href="#489">489</a>             DataInputStream dis = <strong>null</strong>;
<a name="490" href="#490">490</a>             <strong>try</strong> {
<a name="491" href="#491">491</a>                 dis = <strong>new</strong> DataInputStream(<strong>new</strong> FileInputStream(stateFile));
<a name="492" href="#492">492</a>                 result = dis.readShort();
<a name="493" href="#493">493</a>             } <strong>catch</strong> (FileNotFoundException e) {
<a name="494" href="#494">494</a>                 e.printStackTrace();
<a name="495" href="#495">495</a>             } <strong>catch</strong> (IOException e) {
<a name="496" href="#496">496</a>                 e.printStackTrace();
<a name="497" href="#497">497</a>             } <strong>finally</strong> {
<a name="498" href="#498">498</a>                 <strong>try</strong> {
<a name="499" href="#499">499</a>                     <strong>if</strong> (dis != <strong>null</strong>) {
<a name="500" href="#500">500</a>                         dis.close();
<a name="501" href="#501">501</a>                     }
<a name="502" href="#502">502</a>                 } <strong>catch</strong> (IOException e) {
<a name="503" href="#503">503</a>                     e.printStackTrace();
<a name="504" href="#504">504</a>                 }
<a name="505" href="#505">505</a>             }
<a name="506" href="#506">506</a>         }
<a name="507" href="#507">507</a>         <strong>return</strong> result;
<a name="508" href="#508">508</a>     }
<a name="509" href="#509">509</a>     
<a name="510" href="#510">510</a>     <strong>protected</strong> <strong>void</strong> saveCheckpointSerialNumber(<strong>final</strong> File checkpointDir,
<a name="511" href="#511">511</a>             <strong>final</strong> <strong>int</strong> serialNo)
<a name="512" href="#512">512</a>     throws IOException {
<a name="513" href="#513">513</a>         <em class="comment">// Write out the current state of the ARCWriter serial number.</em>
<a name="514" href="#514">514</a>         File f = <strong>new</strong> File(checkpointDir, getCheckpointStateFile());
<a name="515" href="#515">515</a>         DataOutputStream dos = <strong>new</strong> DataOutputStream(<strong>new</strong> FileOutputStream(f));
<a name="516" href="#516">516</a>         <strong>try</strong> {
<a name="517" href="#517">517</a>             dos.writeShort(serialNo);
<a name="518" href="#518">518</a>         } <strong>finally</strong> {
<a name="519" href="#519">519</a>             dos.close();
<a name="520" href="#520">520</a>         }
<a name="521" href="#521">521</a>     }
<a name="522" href="#522">522</a> }
</pre>
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