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Nodes are now inserted/updated in the database in the same order

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they were marked as dirty in the transactor. This is to avoid
exceptions when databases check for relational constraints in
inserted objects.
This commit is contained in:
hns 2002-05-14 16:35:18 +00:00
parent 77fbf7e5b4
commit d269727524
1 changed files with 13 additions and 103 deletions
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116
src/helma/objectmodel/db/Transactor.java
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@ -22,6 +22,7 @@ public class Transactor extends Thread {
// List of nodes to be updated
private HashMap nodes;
private ArrayList nodesArray;
// List of visited clean nodes
private HashMap cleannodes;
// Is a transaction in progress?
@ -44,6 +45,7 @@ public class Transactor extends Thread {
super (group, runnable, group.getName ());
this.nmgr = nmgr;
nodes = new HashMap ();
nodesArray = new ArrayList ();
cleannodes = new HashMap ();
sqlCon = new HashMap ();
active = false;
@ -56,6 +58,7 @@ public class Transactor extends Thread {
Key key = node.getKey ();
if (!nodes.containsKey (key)) {
nodes.put (key, node);
nodesArray.add (node);
}
}
}
@ -64,6 +67,7 @@ public class Transactor extends Thread {
if (node != null) {
Key key = node.getKey ();
nodes.remove (key);
nodesArray.remove (node);
}
}
@ -110,6 +114,7 @@ public class Transactor extends Thread {
abort ();
nodes.clear ();
nodesArray.clear ();
cleannodes.clear ();
txn = nmgr.db.beginTransaction ();
active = true;
@ -125,12 +130,12 @@ public class Transactor extends Thread {
}
int ins = 0, upd = 0, dlt = 0;
int l = nodes.size ();
int l = nodesArray.size ();
Replicator replicator = nmgr.getReplicator ();
for (Iterator i=nodes.values().iterator(); i.hasNext (); ) {
Node node = (Node) i.next ();
for (int i=0; i<l; i++) {
Node node = (Node) nodesArray.get (i);
// update nodes in db
int nstate = node.getState ();
if (nstate == Node.NEW) {
@ -162,6 +167,7 @@ public class Transactor extends Thread {
}
nodes.clear ();
nodesArray.clear ();
cleannodes.clear ();
if (nmgr.idgen.dirty) {
@ -180,14 +186,16 @@ public class Transactor extends Thread {
public synchronized void abort () throws Exception {
for (Iterator i=nodes.values().iterator(); i.hasNext(); ) {
Node node = (Node) i.next ();
int l = nodesArray.size ();
for (int i=0; i<l; i++ ) {
Node node = (Node) nodesArray.get (i);
// Declare node as invalid, so it won't be used by other threads that want to
// write on it and remove it from cache
nmgr.evictNode (node);
node.clearWriteLock ();
}
nodes.clear ();
nodesArray.clear ();
cleannodes.clear ();
// close any JDBC connections associated with this transactor thread
closeConnections ();
@ -242,101 +250,3 @@ public class Transactor extends Thread {