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* Extract collection clearing in commit() and abort() into new recycle() method,

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and throw away collections in order to avoid retaining too much memory.
This commit is contained in:
hns 2006-12-12 13:15:59 +00:00
parent 7e00def51c
commit d843138386
1 changed files with 24 additions and 12 deletions
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36
src/helma/objectmodel/db/Transactor.java
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@ -113,7 +113,7 @@ public class Transactor extends Thread {
/**
* Keep a reference to an unmodified Node local to this transaction
*
* @param node ...
* @param node the node to register
*/
public void visitCleanNode(Node node) {
if (node != null) {
@ -128,8 +128,8 @@ public class Transactor extends Thread {
/**
* Keep a reference to an unmodified Node local to this transaction
*
* @param key ...
* @param node ...
* @param key the key to register with
* @param node the node to register
*/
public void visitCleanNode(Key key, Node node) {
if (node != null) {
@ -227,11 +227,11 @@ public class Transactor extends Thread {
dirtyNodes.clear();
cleanNodes.clear();
parentNodes.clear();
testedConnections.clear();
txn = nmgr.db.beginTransaction();
active = true;
tstart = System.currentTimeMillis();
tname = name;
testedConnections.clear();
}
/**
@ -353,10 +353,7 @@ public class Transactor extends Thread {
}
// clear the node collections
dirtyNodes.clear();
cleanNodes.clear();
parentNodes.clear();
testedConnections.clear();
recycle();
if (active) {
active = false;
@ -398,10 +395,7 @@ public class Transactor extends Thread {
}
// clear the node collections
dirtyNodes.clear();
cleanNodes.clear();
parentNodes.clear();
testedConnections.clear();
recycle();
// close any JDBC connections associated with this transactor thread
closeConnections();
@ -470,6 +464,24 @@ public class Transactor extends Thread {
}
}
/**
* Clear collections and throw them away. They may have grown large,
* so the benefit of keeping them (less GC) needs to be weighted against
* the potential increas in memory usage.
*/
private synchronized void recycle() {
// clear the node collections to ease garbage collection
dirtyNodes.clear();
cleanNodes.clear();
parentNodes.clear();
testedConnections.clear();
// create new collections
dirtyNodes = new HashMap();
cleanNodes = new HashMap();
parentNodes = new HashSet();
testedConnections = new HashSet();
}
/**
* Return the name of the current transaction. This is usually the request
* path for the underlying HTTP request.