org.exist.storage
Class XQueryPool

java.lang.Object
  org.exist.util.hashtable.AbstractHashtable
      org.exist.util.hashtable.Object2ObjectHashMap
          org.exist.storage.XQueryPool

public class XQueryPool

extends Object2ObjectHashMap

Global pool for pre-compiled XQuery expressions. Expressions are stored and retrieved from the pool by comparing the Source objects from which they were created. For each XQuery, a maximum of MAX_STACK_SIZE compiled expressions are kept in the pool. An XQuery expression will be removed from the pool if it has not been used for a pre-defined timeout. These settings can be configured in conf.xml.

Author:

wolf

Nested Class Summary

Nested classes inherited from class org.exist.util.hashtable.Object2ObjectHashMap

Object2ObjectHashMap.Object2ObjectIterator

Nested classes inherited from class org.exist.util.hashtable.AbstractHashtable

AbstractHashtable.HashtableIterator, AbstractHashtable.HashtableOverflowException

Field Summary

static int	MAX_POOL_SIZE
static int	MAX_STACK_SIZE
static long	TIMEOUT
static long	TIMEOUT_CHECK_INTERVAL

Fields inherited from class org.exist.util.hashtable.Object2ObjectHashMap

keys, values

Fields inherited from class org.exist.util.hashtable.AbstractHashtable

items, maxRehash, REMOVED, tabSize

Constructor Summary

XQueryPool(Configuration conf)

Method Summary

CompiledXQuery	borrowCompiledXQuery(DBBroker broker, Source source)
void	returnCompiledXQuery(Source source, CompiledXQuery xquery)

Methods inherited from class org.exist.util.hashtable.Object2ObjectHashMap

get, getIndex, hash, insert, iterator, put, rehash, remove, valueIterator

Methods inherited from class org.exist.util.hashtable.AbstractHashtable

getMaxRehash, isPrime, nextPrime, size

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_POOL_SIZE

public static final int MAX_POOL_SIZE

See Also:

Constant Field Values

MAX_STACK_SIZE

public static final int MAX_STACK_SIZE

See Also:

Constant Field Values

TIMEOUT

public static final long TIMEOUT

See Also:

Constant Field Values

TIMEOUT_CHECK_INTERVAL

public static final long TIMEOUT_CHECK_INTERVAL

See Also:

Constant Field Values

Constructor Detail

XQueryPool

public XQueryPool(Configuration conf)

Parameters:

conf -

Method Detail

returnCompiledXQuery

public void returnCompiledXQuery(Source source,
                                 CompiledXQuery xquery)

borrowCompiledXQuery

public CompiledXQuery borrowCompiledXQuery(DBBroker broker,
                                           Source source)