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Build the shared indexed reader early (before commit)

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git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@4832 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Andrew Hind
2007-01-15 15:39:14 +00:00
parent 91875aa76c
commit 1746843e34
1 changed files with 124 additions and 92 deletions
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136
source/java/org/alfresco/repo/search/impl/lucene/index/IndexInfo.java
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@@ -69,11 +69,7 @@ import org.apache.lucene.store.IndexOutput;
import org.apache.lucene.store.RAMDirectory;
/**
* The information that makes up an index.
*
* IndexInfoVersion
*
* Repeated information of the form
* The information that makes up an index. IndexInfoVersion Repeated information of the form
* <ol>
* <li> Index Type.
* <li> sub-directory name.
@@ -84,17 +80,12 @@ import org.apache.lucene.store.RAMDirectory;
* <li>Overlay: Transaction status
* </ol>
* </ol>
*
* Merges always take place to new indexes so we can detect merge failure or partial merges. Or we do not know what has merged.
*
* Incomplete delete merging does not matter - the overlay would still exist and be treated as such. So a document may be deleted in the index as well as in the applied overlay. It
* is still correctly deleted.
*
* NOTE: Public methods lock as required, the private methods assume that the appropriate locks have been obtained.
*
* TODO: Write element status into individual directories. This would be enough for recovery if both index files are lost or corrupted.
*
* TODO: Tidy up index status at start up or after some time. How long would you leave a merge to run?
* Merges always take place to new indexes so we can detect merge failure or partial merges. Or we do not know what has
* merged. Incomplete delete merging does not matter - the overlay would still exist and be treated as such. So a
* document may be deleted in the index as well as in the applied overlay. It is still correctly deleted. NOTE: Public
* methods lock as required, the private methods assume that the appropriate locks have been obtained. TODO: Write
* element status into individual directories. This would be enough for recovery if both index files are lost or
* corrupted. TODO: Tidy up index status at start up or after some time. How long would you leave a merge to run?
*
* @author Andy Hind
*/
@@ -155,7 +146,8 @@ public class IndexInfo
private long version = -1;
/**
* The index entries that make up this index. Map entries are looked up by name. These are maintained in order so document order is maintained.
* The index entries that make up this index. Map entries are looked up by name. These are maintained in order so
* document order is maintained.
*/
private LinkedHashMap<String, IndexEntry> indexEntries = new LinkedHashMap<String, IndexEntry>();
@@ -438,16 +430,15 @@ public class IndexInfo
{
cleanerThread = new Thread(cleaner);
cleanerThread.setDaemon(true);
cleanerThread.setName("Index cleaner thread "+indexDirectory);
cleanerThread.setName("Index cleaner thread " + indexDirectory);
cleanerThread.start();
}
if (enableMergerThread)
{
mergerThread = new Thread(merger);
mergerThread.setDaemon(true);
mergerThread.setName("Index merger thread "+indexDirectory);
mergerThread.setName("Index merger thread " + indexDirectory);
mergerThread.start();
}
@@ -861,15 +852,15 @@ public class IndexInfo
IndexReader reader = null;
if (deletions == null || deletions.size() == 0)
{
reader = new MultiReader(new IndexReader[] {mainIndexReader, deltaReader });
reader = new MultiReader(new IndexReader[] { mainIndexReader, deltaReader });
}
else
{
reader = new MultiReader(new IndexReader[] {
new FilterIndexReaderByNodeRefs2(mainIndexReader, deletions, deleteOnlyNodes), deltaReader });
}
reader = ReferenceCountingReadOnlyIndexReaderFactory.createReader("MainReader"+id, reader);
ReferenceCounting refCounting = (ReferenceCounting)reader;
reader = ReferenceCountingReadOnlyIndexReaderFactory.createReader("MainReader" + id, reader);
ReferenceCounting refCounting = (ReferenceCounting) reader;
refCounting.incrementReferenceCount();
refCounting.setInvalidForReuse();
return reader;
@@ -888,6 +879,12 @@ public class IndexInfo
throw new IndexerException("\"null\" is not a valid identifier for a transaction");
}
final Transition transition = getTransition(state);
getReadLock();
try
{
transition.beforeWithReadLock(id, toDelete, read);
releaseReadLock();
getWriteLock();
try
{
@@ -930,9 +927,15 @@ public class IndexInfo
}
finally
{
getReadLock();
releaseWriteLock();
}
}
finally
{
releaseReadLock();
}
}
//
// Internal support for status management
@@ -967,6 +970,8 @@ public class IndexInfo
private interface Transition
{
void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException;
void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException;
boolean requiresFileLock();
@@ -974,6 +979,11 @@ public class IndexInfo
private class PreparingTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1001,6 +1011,11 @@ public class IndexInfo
private class PreparedTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1066,6 +1081,11 @@ public class IndexInfo
private class CommittingTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1093,6 +1113,14 @@ public class IndexInfo
private class CommittedTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
// Make sure we have set up the reader for the data
// ... and close it so we do not up the ref count
getReferenceCountingIndexReader(id).close();
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1129,6 +1157,7 @@ public class IndexInfo
merger.notify();
}
}
}
else
{
@@ -1145,6 +1174,11 @@ public class IndexInfo
private class RollingBackTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1173,6 +1207,11 @@ public class IndexInfo
private class RolledBackTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1201,6 +1240,11 @@ public class IndexInfo
private class DeletableTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1234,6 +1278,11 @@ public class IndexInfo
private class ActiveTransition implements Transition
{
public void beforeWithReadLock(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
}
public void transition(String id, Set<Term> toDelete, Set<Term> read) throws IOException
{
IndexEntry entry = indexEntries.get(id);
@@ -1746,7 +1795,7 @@ public class IndexInfo
if (s_logger.isDebugEnabled())
{
long end = System.nanoTime();
s_logger.debug(" ... got file lock in " + ((end - start)/10e6f) + " ms");
s_logger.debug(" ... got file lock in " + ((end - start) / 10e6f) + " ms");
}
if (!checkVersion())
{
@@ -1862,6 +1911,7 @@ public class IndexInfo
catch (InterruptedException e)
{
runnable = false;
s_logger.warn("Cleaner thread for " + indexDirectory + "stopped by interruption.");
}
}
}
@@ -1899,31 +1949,14 @@ public class IndexInfo
}
/**
* Supported by one thread.
*
* 1) If the first index is a delta we can just change it to an index.
*
* There is now here to apply the deletions
*
* 2) Merge indexes
*
* Combine indexes together according to the target index merge strategy. This is a trade off to make an optimised index but not spend too much time merging and optimising
* small merges.
*
* 3) Apply next deletion set to indexes
*
* Apply the deletions for the first delta to all the other indexes. Deletes can be applied with relative impunity. If any are applied they take effect as required.
*
* 1) 2) and 3) are mutually exclusive try in order
*
* This could be supported in another thread
*
* 4) Merge deltas
*
* Merge two index deltas together. Starting at the end. Several merges can be going on at once.
*
* a) Find merge b) Set state c) apply deletions to the previous delta d) update state e) add deletions to the previous delta deletion list f) update state
*
* Supported by one thread. 1) If the first index is a delta we can just change it to an index. There is now here to
* apply the deletions 2) Merge indexes Combine indexes together according to the target index merge strategy. This
* is a trade off to make an optimised index but not spend too much time merging and optimising small merges. 3)
* Apply next deletion set to indexes Apply the deletions for the first delta to all the other indexes. Deletes can
* be applied with relative impunity. If any are applied they take effect as required. 1) 2) and 3) are mutually
* exclusive try in order This could be supported in another thread 4) Merge deltas Merge two index deltas together.
* Starting at the end. Several merges can be going on at once. a) Find merge b) Set state c) apply deletions to the
* previous delta d) update state e) add deletions to the previous delta deletion list f) update state
*/
private enum MergeAction
@@ -2655,7 +2688,7 @@ public class IndexInfo
if (s_logger.isDebugEnabled())
{
long end = System.nanoTime();
s_logger.debug("...GOT WRITE LOCK - " + threadName + " - in " + ((end - start)/10e6f) + " ms");
s_logger.debug("...GOT WRITE LOCK - " + threadName + " - in " + ((end - start) / 10e6f) + " ms");
}
}
@@ -2682,7 +2715,7 @@ public class IndexInfo
if (s_logger.isDebugEnabled())
{
long end = System.nanoTime();
s_logger.debug("...GOT READ LOCK - " + threadName + " - in " + ((end - start)/10e6f) + " ms");
s_logger.debug("...GOT READ LOCK - " + threadName + " - in " + ((end - start) / 10e6f) + " ms");
}
}
@@ -2830,5 +2863,4 @@ public class IndexInfo
this.writerUseCompoundFile = writerUseCompoundFile;
}
}