User: danch
Date: 01/06/12 23:52:17
Modified: src/main/org/jboss/ejb/plugins/jaws/jdbc
JDBCCommandFactory.java
JDBCDefinedFinderCommand.java
JDBCFindAllCommand.java JDBCFindByCommand.java
JDBCFinderCommand.java JDBCLoadEntitiesCommand.java
JDBCLoadEntityCommand.java
Log:
second pass at collection finder optimization - this fixes problem with defined
finders doing joins
Revision Changes Path
1.9 +149 -1
jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCCommandFactory.java
Index: JDBCCommandFactory.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCCommandFactory.java,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9
--- JDBCCommandFactory.java 2001/05/27 17:59:00 1.8
+++ JDBCCommandFactory.java 2001/06/13 06:52:17 1.9
@@ -8,9 +8,16 @@
package org.jboss.ejb.plugins.jaws.jdbc;
import java.lang.reflect.Method;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.List;
+import java.util.LinkedList;
+import java.util.Iterator;
import javax.naming.Context;
import javax.naming.InitialContext;
+import javax.transaction.Transaction;
+import javax.transaction.TransactionManager;
import org.jboss.ejb.EntityContainer;
import org.jboss.ejb.DeploymentException;
@@ -38,13 +45,14 @@
import org.jboss.ejb.plugins.jaws.metadata.FinderMetaData;
import org.jboss.logging.Log;
+import org.jboss.util.FinderResults;
/**
* JAWSPersistenceManager JDBCCommandFactory
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Justin Forder</a>
* @author <a href="[EMAIL PROTECTED]">danch (Dan Christopherson</a>
- * @version $Revision: 1.8 $
+ * @version $Revision: 1.9 $
*/
public class JDBCCommandFactory implements JPMCommandFactory
{
@@ -56,6 +64,20 @@
private Log log;
private boolean debug = false;
+ /** a map of data preloaded within some transaction for some entity. This map
+ * is keyed by Transaction and the data are hashmaps with key = entityKey and
+ * data = Object[] containing the entity data.
+ * @todo use weak references to ease memory. */
+ private Map preloadedData = new HashMap();
+ /** A map of data preloaded without a transaction context. key=entityKey,
+ * data = Object[] containing entity data
+ * @todo use weak references to ease memory.
+ */
+ private Map nonTransactionalPreloadData = new HashMap();
+
+ /** a Transaction manager so that we can link preloaded data to a transaction */
+ private TransactionManager tm;
+
// These support singletons (within the scope of this factory)
private JDBCBeanExistsCommand beanExistsCommand;
private JPMFindEntitiesCommand findEntitiesCommand;
@@ -87,6 +109,8 @@
if (metadata == null) {
throw new DeploymentException("No metadata found for bean " +
ejbName);
}
+
+ tm = (TransactionManager) container.getTransactionManager();
}
// Public --------------------------------------------------------
@@ -231,5 +255,129 @@
}
+ /** Add preloaded data for an entity within the scope of a transaction */
+ /*package*/ void addPreloadData(Object entityKey, Object[] entityData)
+ {
+ Transaction trans = null;
+ try {
+ trans = tm.getTransaction();
+ } catch (javax.transaction.SystemException sysE) {
+ log.warning("System exception getting transaction for preload - can't get
preloaded data for "+entityKey);
+ return;
+ }
+//log.debug("PRELOAD: adding preload for "+entityKey+" in transaction "+(trans !=
null ? trans.toString() : "NONE"));
+
+ if (trans != null) {
+ synchronized (preloadedData) {
+ Map entitiesInTransaction = (Map)preloadedData.get(trans);
+ if (entitiesInTransaction == null) {
+ try {
+ trans.registerSynchronization(new PreloadClearSynch(trans));
+ } catch (javax.transaction.SystemException se) {
+ log.warning("System exception getting transaction for preload -
can't get preloaded data for "+entityKey);
+ return;
+ } catch (javax.transaction.RollbackException re) {
+ log.warning("Rollback exception getting transaction for preload -
can't get preloaded data for "+entityKey);
+ return;
+ }
+ entitiesInTransaction = new HashMap();
+ preloadedData.put(trans, entitiesInTransaction);
+ }
+ entitiesInTransaction.put(entityKey, entityData);
+ }
+ } else {
+ synchronized (nonTransactionalPreloadData) {
+ nonTransactionalPreloadData.put(entityKey, entityData);
+ }
+ }
+ }
+
+ /** get data that we might have preloaded for an entity in a transaction -
+ * may return null!
+ */
+ /*package*/ Object[] getPreloadData(Object entityKey)
+ {
+ Transaction trans = null;
+ try {
+ trans = tm.getTransaction();
+ } catch (javax.transaction.SystemException sysE) {
+ log.warning("System exception getting transaction for preload - not
preloading "+entityKey);
+ return null;
+ }
+
+ Object[] result = null;
+ if (trans != null) {
+ synchronized (preloadedData) {
+ Map entitiesInTransaction = (Map)preloadedData.get(trans);
+ if (entitiesInTransaction != null)
+ result = (Object[])entitiesInTransaction.get(entityKey);
+ //remove it now?
+ }
+ } else {
+ synchronized (nonTransactionalPreloadData) {
+ result = (Object[])nonTransactionalPreloadData.get(entityKey);
+ }
+ }
+//log.debug("PRELOAD: returning "+result+" as preload for "+entityKey);
+ return result;
+ }
+
+ /** clear out any data we have preloaded for any entity in this transaction */
+ /*package*/ void clearPreloadForTrans(Transaction trans)
+ {
+//log.debug("PRELOAD: clearing preload for transaction "+trans.toString());
+ synchronized (preloadedData) {
+ preloadedData.remove(trans);
+ }
+ }
+
+
// Private -------------------------------------------------------
+ /** an inner class used to key the FinderResults by their finder method and
+ * the transaction they're invoked within
+ */
+ private static class PreloadDataKey {
+ private Object entityKey;
+ private Transaction transaction;
+
+ private int hashCode;
+
+ public PreloadDataKey(Object entityKey, Transaction transaction) {
+ this.entityKey = entityKey;
+ this.transaction = transaction;
+
+ //accumulate the hashcode.
+ /** @todo investigate ways of combining these that will give the least
collisions */
+ this.hashCode = entityKey.hashCode();
+ if (transaction != null)
+ this.hashCode += transaction.hashCode();
+ }
+
+ public int hashCode() {
+ return hashCode;
+ }
+ public boolean equals(Object o) {
+ if (o instanceof PreloadDataKey) {
+ PreloadDataKey other = (PreloadDataKey)o;
+ return (other.entityKey.equals(this.entityKey)) &&
+ ( (other.transaction == null && this.transaction == null) ||
+ ( (other.transaction != null && this.transaction != null) &&
+ (other.transaction.equals(this.transaction)) ) );
+ }
+ return false;
+ }
+ }
+
+ private class PreloadClearSynch implements javax.transaction.Synchronization{
+ private Transaction forTrans;
+ public PreloadClearSynch(Transaction forTrans) {
+ this.forTrans = forTrans;
+ }
+ public void afterCompletion(int p0) {
+ clearPreloadForTrans(forTrans);
+ }
+ public void beforeCompletion() {
+ //no-op
+ }
+ }
}
1.14 +130 -107
jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCDefinedFinderCommand.java
Index: JDBCDefinedFinderCommand.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCDefinedFinderCommand.java,v
retrieving revision 1.13
retrieving revision 1.14
diff -u -r1.13 -r1.14
--- JDBCDefinedFinderCommand.java 2001/05/27 17:59:00 1.13
+++ JDBCDefinedFinderCommand.java 2001/06/13 06:52:17 1.14
@@ -26,8 +26,9 @@
* @author <a href="mailto:[EMAIL PROTECTED]";>Joe Shevland</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Justin Forder</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Michel de Groot</a>
- * @author <a href="[EMAIL PROTECTED]">danch (Dan Christopherson</a>
- * @version $Revision: 1.13 $
+ * @author Vinay Menon
+ * @author <a href="mailto:[EMAIL PROTECTED]";>danch (Dan Christopherson</a>
+ * @version $Revision: 1.14 $
*/
public class JDBCDefinedFinderCommand extends JDBCFinderCommand
{
@@ -35,6 +36,10 @@
private int[] parameterArray;
private TypeMappingMetaData typeMapping;
+
+ private String fromClause = "";
+ private String whereClause = "";
+ private String orderClause = "";
// Constructors --------------------------------------------------
@@ -72,36 +77,128 @@
// Since the fields in order clause also will form the select clause together
with
// the pk field list, we have to clean the order clause from ASC/DESC's and
fields
// that already are within the pk list
+ // Note that extraOrderColumns will start with a ','
+ String extraOrderColumns = getExtraOrderColumns(f);
+
+ String lcQuery = query.toLowerCase();
+ // build from clause, including any joins specified by the deployer/assembler
+ // In case of join query:
+ // order must explicitly identify tablename.field to order on
+ // query must start with "INNER JOIN <table to join with> WHERE
+ // <regular query with fully identified fields>"
+ if (lcQuery.startsWith(",") || lcQuery.startsWith("inner join")) {
+ //this is the case of a 'where' that is build to actually join tables:
+ // ,table2 as foo where foo.col1 = entitytable.col2 AND
entitytable.filter = {1}
+ // or
+ // inner join table2 on table2.col1 = entitytable.col2 AND
entitytable.filter = {1}
+ String tableList = null;
+ int whereStart = lcQuery.indexOf("where");
+ if (whereStart == -1) {
+ //log this at debug in case someone has made a mistake, but assume that
+ // they mean a findAll.
+ log.debug("Strange query for finder "+f.getName()+
+ ". Includes join, but no 'where' clause. Is this a findAll?");
+ tableList = lcQuery;
+ whereClause = "";
+ } else {
+ tableList = lcQuery.substring(0, whereStart);
+ whereClause = lcQuery.substring(whereStart);
+ }
+ fromClause = "FROM "+jawsEntity.getTableName()+tableList;
+ } else {
+ fromClause = "FROM "+jawsEntity.getTableName();
+ if (lcQuery.startsWith("where"))
+ whereClause = lcQuery;
+ else
+ whereClause = "where "+lcQuery;
+ }
+
+
+ StringBuffer sqlBuffer = new StringBuffer();
+ sqlBuffer.append("SELECT ");
+ //where clauseString primaryKeyList = getPkColumnList();
+ String tableName = jawsEntity.getTableName();
+ StringTokenizer stok = new StringTokenizer(getPkColumnList(),",");
+
+ while(stok.hasMoreTokens()){
+ sqlBuffer.append(tableName);
+ sqlBuffer.append(".");
+ sqlBuffer.append(stok.nextElement().toString());
+ sqlBuffer.append(",");
+ }
+ // ditch the last ',' at the end...
+ sqlBuffer.setLength(sqlBuffer.length()-1);
+ // because it's already on the front of extraOrderColumns
+ sqlBuffer.append(extraOrderColumns);
+ sqlBuffer.append(' ');
+ sqlBuffer.append(fromClause);
+ sqlBuffer.append(' ');
+ sqlBuffer.append(whereClause);
+
+ if (f.getOrder() != null && !f.getOrder().equals(""))
+ {
+ orderClause = " ORDER BY "+f.getOrder();
+ sqlBuffer.append(orderClause);
+ }
+ setSQL(sqlBuffer.toString());
+ }
+
+ public String getWhereClause() {
+ return whereClause;
+ }
+
+ public String getFromClause() {
+ return fromClause;
+ }
+ public String getOrderByClause() {
+ return orderClause;
+ }
+
+ /** helper method to clean the order clause into a list of table.field
+ * entries. This is used only to clean up the algorythm in the ctor.
+ * @return String array containing order fields stripped of 'ASC' or 'DESC'
+ * modifiers.
+ */
+ protected String[] cleanOrderClause(String rawOrder) {
+ //Split it into tokens. These tokens might contain ASC/DESC that we have to
get rid of
+ StringTokenizer orderTokens = new StringTokenizer(rawOrder, ",");
+ String orderToken;
+ String[] checkedOrderTokens = new String[orderTokens.countTokens()];
+ int ix = 0;
+ while(orderTokens.hasMoreTokens())
+ {
+ orderToken = orderTokens.nextToken().trim();
+ //Get rid of ASC's
+ int i = orderToken.toUpperCase().indexOf(" ASC");
+ if(i!=-1)
+ checkedOrderTokens[ix] = orderToken.substring(0, i).trim();
+ else
+ {
+ //Get rid of DESC's
+ i = orderToken.toUpperCase().indexOf(" DESC");
+ if(i!=-1)
+ checkedOrderTokens[ix] = orderToken.substring(0, i).trim();
+ else
+ {
+ //No ASC/DESC - just use it as it is
+ checkedOrderTokens[ix] = new String(orderToken).trim();
+ }
+ }
+ ix++;
+ }
+ return checkedOrderTokens;
+ }
+
+ /** A helper method that 'folds' any columns specified in an order clause
+ * into the primary key fields so that they can be included in the select
+ * list <b>after</b> all primary key fields.
+ */
+ private String getExtraOrderColumns(FinderMetaData f) {
String strippedOrder = "";
if(f.getOrder()!=null && f.getOrder()!="")
{
- //Split it into tokens. These tokens might contain ASC/DESC that we have to
get rid of
- StringTokenizer orderTokens = new StringTokenizer(f.getOrder(), ",");
- String orderToken;
- String[] checkedOrderTokens = new String[orderTokens.countTokens()];
- int ix = 0;
- while(orderTokens.hasMoreTokens())
- {
- orderToken = orderTokens.nextToken().trim();
- //Get rid of ASC's
- int i = orderToken.toUpperCase().indexOf(" ASC");
- if(i!=-1)
- checkedOrderTokens[ix] = orderToken.substring(0, i).trim();
- else
- {
- //Get rid of DESC's
- i = orderToken.toUpperCase().indexOf(" DESC");
- if(i!=-1)
- checkedOrderTokens[ix] = orderToken.substring(0, i).trim();
- else
- {
- //No ASC/DESC - just use it as it is
- checkedOrderTokens[ix] = new String(orderToken).trim();
- }
- }
- ix++;
- }
-
+ String[] checkedOrderTokens = cleanOrderClause(f.getOrder());
+
//Next step is to make up a Set of all pk tokens
StringTokenizer pkTokens = new StringTokenizer(getPkColumnList(), ",");
Set setOfPkTokens = new HashSet(pkTokens.countTokens());
@@ -109,7 +206,7 @@
{
setOfPkTokens.add(pkTokens.nextToken().trim());
}
-
+
//Now is the time to check for duplicates between pk and order tokens
int i = 0;
while(i < checkedOrderTokens.length)
@@ -121,7 +218,7 @@
}
i++;
}
-
+
//Ok, build a new order string that we can use later on
StringBuffer orderTokensToUse = new StringBuffer("");
i = 0;
@@ -136,83 +233,9 @@
}
// Note that orderTokensToUse will always start with ", " if there is any
order tokens
strippedOrder = orderTokensToUse.toString();
- }
-
- // Construct SQL
- // In case of join query:
- // order must explicitly identify tablename.field to order on
- // query must start with "INNER JOIN <table to join with> WHERE
- // <regular query with fully identified fields>"
- String sql = null;
- if (query.toLowerCase().startsWith(",")) {
- //Modified by Vinay Menon
- StringBuffer sqlBuffer = new StringBuffer();
-
- sqlBuffer.append("SELECT ");
-
- String primaryKeyList = getPkColumnList();
- String tableName = jawsEntity.getTableName();
- StringTokenizer stok = new StringTokenizer(primaryKeyList,",");
-
- while(stok.hasMoreTokens()){
- sqlBuffer.append(tableName);
- sqlBuffer.append(".");
- sqlBuffer.append(stok.nextElement().toString());
- sqlBuffer.append(",");
- }
-
- sqlBuffer.setLength(sqlBuffer.length()-1);
- sqlBuffer.append(strippedOrder);
- sqlBuffer.append(" FROM ");
- sqlBuffer.append(jawsEntity.getTableName());
- sqlBuffer.append(" ");
- sqlBuffer.append(query);
-
- sql = sqlBuffer.toString();
- } else
- if (query.toLowerCase().startsWith("inner join")) {
- StringBuffer sqlBuffer = new StringBuffer();
-
- sqlBuffer.append("SELECT ");
-
- String primaryKeyList = getPkColumnList();
- String tableName = jawsEntity.getTableName();
- StringTokenizer stok = new StringTokenizer(primaryKeyList,",");
-
- while(stok.hasMoreTokens()){
- sqlBuffer.append(tableName);
- sqlBuffer.append(".");
- sqlBuffer.append(stok.nextElement().toString());
- sqlBuffer.append(",");
- }
-
- sqlBuffer.setLength(sqlBuffer.length()-1);
- sqlBuffer.append(strippedOrder);
- sqlBuffer.append(" FROM ");
- sqlBuffer.append(jawsEntity.getTableName());
- sqlBuffer.append(" ");
- sqlBuffer.append(query);
-
- sql = sqlBuffer.toString();
- } else {
- // regular query; check if query is empty,
- // if so, this is a select all and WHERE should not be used
- if (f.getQuery() == null) {
- sql = "SELECT " + getPkColumnList() + strippedOrder +
- " FROM " + jawsEntity.getTableName();
- } else {
- sql = "SELECT " + getPkColumnList() + strippedOrder +
- " FROM " + jawsEntity.getTableName() + " WHERE " + query;
- }
}
- if (f.getOrder() != null && !f.getOrder().equals(""))
- {
- sql += " ORDER BY "+f.getOrder();
- }
-
- setSQL(sql);
- }
-
+ return strippedOrder;
+ }
// JDBCFinderCommand overrides ------------------------------------
protected void setParameters(PreparedStatement stmt, Object argOrArgs)
1.5 +12 -1
jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCFindAllCommand.java
Index: JDBCFindAllCommand.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCFindAllCommand.java,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- JDBCFindAllCommand.java 2001/05/27 00:49:15 1.4
+++ JDBCFindAllCommand.java 2001/06/13 06:52:17 1.5
@@ -17,7 +17,7 @@
* @author <a href="mailto:[EMAIL PROTECTED]";>Marc Fleury</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Joe Shevland</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Justin Forder</a>
- * @version $Revision: 1.4 $
+ * @version $Revision: 1.5 $
*/
public class JDBCFindAllCommand extends JDBCFinderCommand
{
@@ -30,5 +30,16 @@
String sql = "SELECT " + getPkColumnList() + " FROM " +
jawsEntity.getTableName();
setSQL(sql);
+ }
+
+ public String getWhereClause() {
+ return "";
+ }
+
+ public String getFromClause() {
+ return " FROM " + jawsEntity.getTableName();
+ }
+ public String getOrderByClause() {
+ return "";
}
}
1.9 +15 -1
jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCFindByCommand.java
Index: JDBCFindByCommand.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCFindByCommand.java,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9
--- JDBCFindByCommand.java 2001/05/27 17:59:00 1.8
+++ JDBCFindByCommand.java 2001/06/13 06:52:17 1.9
@@ -27,7 +27,7 @@
* @author <a href="mailto:[EMAIL PROTECTED]";>Joe Shevland</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Justin Forder</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>danch (Dan Christopherson)</a>
- * @version $Revision: 1.8 $
+ * @version $Revision: 1.9 $
*/
public class JDBCFindByCommand extends JDBCFinderCommand
{
@@ -75,6 +75,20 @@
sql += cmpField.getColumnName() + "=?";
setSQL(sql);
+ }
+
+ // JDBCQueryCommand overrides
+
+ public String getWhereClause() {
+ return cmpField.getColumnName() + "=?";
+ }
+
+ public String getFromClause() {
+ return " FROM "+jawsEntity.getTableName();
+ }
+
+ public String getOrderByClause() {
+ return "";
}
// JDBCFinderCommand overrides -----------------------------------
1.11 +19 -1
jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCFinderCommand.java
Index: JDBCFinderCommand.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCFinderCommand.java,v
retrieving revision 1.10
retrieving revision 1.11
diff -u -r1.10 -r1.11
--- JDBCFinderCommand.java 2001/05/27 00:49:15 1.10
+++ JDBCFinderCommand.java 2001/06/13 06:52:17 1.11
@@ -35,7 +35,7 @@
* @author <a href="mailto:[EMAIL PROTECTED]";>Marc Fleury</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Joe Shevland</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Justin Forder</a>
- * @version $Revision: 1.10 $
+ * @version $Revision: 1.11 $
*/
public abstract class JDBCFinderCommand
extends JDBCQueryCommand
@@ -55,6 +55,24 @@
return finderMetaData;
}
+
+ /** This method must be overridden to return the where clause used in
+ * this query. This must start with the keyword 'WHERE' and include all
+ * conditions needed to execute the query properly.
+ */
+ public abstract String getWhereClause();
+
+ /** This method must be ovverridden to return the full table list for
+ * the query, including any join statements. This must start with the
+ * keyword 'FROM' and include all tables needed to execute the query properly.
+ */
+ public abstract String getFromClause();
+
+ /** This method must be ovverridded to return the full order by clause for
+ * the query, including the 'ORDER BY' keyword.
+ */
+ public abstract String getOrderByClause();
+
// JPMFindEntitiesCommand implementation -------------------------
public FinderResults execute(Method finderMethod,
1.2 +35 -16
jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCLoadEntitiesCommand.java
Index: JDBCLoadEntitiesCommand.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCLoadEntitiesCommand.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- JDBCLoadEntitiesCommand.java 2001/05/27 00:49:15 1.1
+++ JDBCLoadEntitiesCommand.java 2001/06/13 06:52:17 1.2
@@ -19,6 +19,7 @@
import java.sql.PreparedStatement;
import java.sql.ResultSet;
+import java.sql.SQLException;
import org.jboss.ejb.EntityEnterpriseContext;
import org.jboss.ejb.plugins.jaws.JAWSPersistenceManager;
@@ -30,7 +31,8 @@
import org.jboss.util.FinderResults;
/**
- * JAWSPersistenceManager JDBCLoadEntityCommand
+ * Implementation of the LoadEntitiesCommand added in JBoss 2.3. This preloads
+ * data for all entities whose keys were retrieved by a finder.
*
* @see <related>
* @author <a href="mailto:[EMAIL PROTECTED]";>Rickard �berg</a>
@@ -39,7 +41,7 @@
* @author <a href="mailto:[EMAIL PROTECTED]";>Justin Forder</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Dirk Zimmermann</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>danch (Dan Christopherson)</a>
- * @version $Revision: 1.1 $
+ * @version $Revision: 1.2 $
*/
public class JDBCLoadEntitiesCommand
extends JDBCLoadEntityCommand
@@ -86,23 +88,39 @@
while (rs.next())
{
Object key = createKey(rs);
-
- //find the context
- EntityEnterpriseContext ctx = (EntityEnterpriseContext)instances.get(key);
- if (ctx != null) {
- //if the context says it's already valid, don't load it.
- if (!ctx.isValid()) {
- loadOneEntity(rs, ctx);
- ctx.setValid(true);
- }
- } else {
- //if ctx was null, the CMPPersistenceManager doesn't want us to try
- // to load it due to a transaction issue.
- }
+ preloadOneEntity(rs, key);
}
return null;
}
+ protected void preloadOneEntity(ResultSet rs, Object key) {
+//log.debug("PRELOAD: preloading entity "+key);
+ int idx = 1;
+ // skip the PK fields at the beginning of the select.
+ Iterator keyIt = jawsEntity.getPkFields();
+ while (keyIt.hasNext()) {
+ keyIt.next();
+ idx++;
+ }
+
+ int fieldCount = 0;
+ Object[] allValues = new Object[jawsEntity.getNumberOfCMPFields()];
+ Iterator iter = jawsEntity.getCMPFields();
+ try {
+ while (iter.hasNext())
+ {
+ CMPFieldMetaData cmpField = (CMPFieldMetaData)iter.next();
+
+ Object value = getResultObject(rs,
cmpFieldPositionInSelect[fieldCount], cmpField);
+ allValues[fieldCount] = value;
+ fieldCount++;
+ }
+ factory.addPreloadData(key, allValues);
+ } catch (SQLException sqle) {
+ log.warning("SQL Error preloading data for key "+key);
+ }
+ }
+
protected void setParameters(PreparedStatement stmt, Object argOrArgs)
throws Exception
{
@@ -116,7 +134,8 @@
protected String getSQL(Object argOrArgs) throws Exception
{
FinderResults keys = (FinderResults)((Object[])argOrArgs)[0];
- return selectClause + " " + keys.getQueryData().toString();
+ JDBCFinderCommand finder = (JDBCFinderCommand)keys.getFinder();
+ return selectClause + " " + finder.getFromClause() + " " +
finder.getWhereClause() + " " + finder.getOrderByClause();
}
// protected -----------------------------------------------------
1.11 +38 -9
jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCLoadEntityCommand.java
Index: JDBCLoadEntityCommand.java
===================================================================
RCS file:
/cvsroot/jboss/jboss/src/main/org/jboss/ejb/plugins/jaws/jdbc/JDBCLoadEntityCommand.java,v
retrieving revision 1.10
retrieving revision 1.11
diff -u -r1.10 -r1.11
--- JDBCLoadEntityCommand.java 2001/06/06 01:07:40 1.10
+++ JDBCLoadEntityCommand.java 2001/06/13 06:52:17 1.11
@@ -39,7 +39,7 @@
* @author <a href="mailto:[EMAIL PROTECTED]";>Justin Forder</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Dirk Zimmermann</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>danch (Dan Christopherson)</a>
- * @version $Revision: 1.10 $
+ * @version $Revision: 1.11 $
*/
public class JDBCLoadEntityCommand
extends JDBCQueryCommand
@@ -66,7 +66,8 @@
{
super(factory, "Load");
- String sql = createSelectClause() + " WHERE " + getPkColumnWhereList();
+ String sql = createSelectClause() + " FROM " + jawsEntity.getTableName()
+ + " WHERE " + getPkColumnWhereList();
if (jawsEntity.hasSelectForUpdate())
{
sql += " FOR UPDATE";
@@ -89,7 +90,8 @@
{
PkFieldMetaData pkField = (PkFieldMetaData)keyIt.next();
- sql += ((fieldCount==0) ? "" : ",") + pkField.getColumnName();
+ sql += ((fieldCount==0) ? "" : ",") +
+ jawsEntity.getTableName() + "." + pkField.getColumnName();
alreadyListed.put(pkField.getColumnName().toUpperCase(), pkField);
pkColumnNames[fieldCount]=pkField.getColumnName();
fieldCount++;
@@ -102,7 +104,7 @@
{
CMPFieldMetaData cmpField = (CMPFieldMetaData)it.next();
if (alreadyListed.get(cmpField.getColumnName().toUpperCase()) == null) {
- sql += "," + cmpField.getColumnName();
+ sql += "," + jawsEntity.getTableName() + "." + cmpField.getColumnName();
cmpFieldPositionInSelect[cmpFieldCount] = fieldCount+JDBC_WART_OFFSET;
fieldCount++;//because this was another field in the select
} else {
@@ -123,8 +125,8 @@
cmpFieldCount++;
}
- sql += " FROM " + jawsEntity.getTableName();
+
return sql;
}
@@ -137,7 +139,13 @@
{
try
{
- jdbcExecute(ctx);
+ //first check to see if the data was preloaded
+ Object[] data = factory.getPreloadData(ctx.getId());
+ if (data != null) {
+ loadFromPreload(data, ctx);
+ } else {
+ jdbcExecute(ctx);
+ }
} catch (Exception e)
{
throw new ServerException("Load failed", e);
@@ -170,7 +178,28 @@
return null;
}
- protected void loadOneEntity(ResultSet rs, EntityEnterpriseContext ctx) throws
Exception {
+ protected void loadFromPreload(Object[] data, EntityEnterpriseContext ctx)
throws Exception {
+//log.debug("PRELOAD: Loading from preload - entity "+ctx.getId());
+ int fieldCount = 0;
+ Iterator iter = jawsEntity.getCMPFields();
+ while (iter.hasNext())
+ {
+ CMPFieldMetaData cmpField = (CMPFieldMetaData)iter.next();
+
+ setCMPFieldValue(ctx.getInstance(),
+ cmpField,
+ data[fieldCount]);
+ fieldCount++;
+ }
+
+ // Store state to be able to do tuned updates
+ JAWSPersistenceManager.PersistenceContext pCtx =
+ (JAWSPersistenceManager.PersistenceContext)ctx.getPersistenceContext();
+ if (jawsEntity.isReadOnly()) pCtx.lastRead = System.currentTimeMillis();
+ pCtx.state = getState(ctx);
+ }
+
+ protected void loadOneEntity(ResultSet rs, EntityEnterpriseContext ctx) throws
Exception {
int idx = 1;
// skip the PK fields at the beginning of the select.
Iterator keyIt = jawsEntity.getPkFields();
@@ -185,8 +214,8 @@
{
CMPFieldMetaData cmpField = (CMPFieldMetaData)iter.next();
- setCMPFieldValue(ctx.getInstance(),
- cmpField,
+ setCMPFieldValue(ctx.getInstance(),
+ cmpField,
getResultObject(rs, cmpFieldPositionInSelect[fieldCount],
cmpField));
fieldCount++;
}
_______________________________________________
Jboss-development mailing list
[EMAIL PROTECTED]
http://lists.sourceforge.net/lists/listinfo/jboss-development
