[ 1801842 ] DB connection fix & improvements for concurrent threads.

- Integrating contribution from the Posterita Team.

base/.classpath

@@ -18,5 +18,6 @@
 	<classpathentry kind="lib" path="/tools/lib/postgresql.jar"/>
 	<classpathentry kind="lib" path="/tools/lib/ocrs12.jar"/>
 	<classpathentry kind="lib" path="/tools/lib/ojdbc14.jar"/>
+	<classpathentry kind="lib" path="/tools/lib/c3p0-0.9.1.2.jar"/>
 	<classpathentry kind="output" path="build"/>
 </classpath>

base/src/org/compiere/db/AdempiereDatabase.java

@@ -275,7 +275,11 @@ public interface AdempiereDatabase
 	 */
 //	public String getDataType (int displayType, int precision,
 //		boolean defaultValue)
-        
+      
+	/**
+	 * Default sql use to test whether a connection is still valid
+	 */
+	public final static String DEFAULT_CONN_TEST_SQL = "SELECT Version FROM AD_System";
 	
 }   //  AdempiereDatabase
 

base/src/org/compiere/model/MSequence.java

@@ -16,9 +16,13 @@
  *****************************************************************************/
 package org.compiere.model;
 
+import java.rmi.RemoteException;
 import java.sql.*;
 import java.util.*;
 import java.util.logging.*;
+
+import org.compiere.db.CConnection;
+import org.compiere.interfaces.Server;
 import org.compiere.util.*;
 
 /**
@@ -37,6 +41,7 @@ public class MSequence extends X_AD_Sequence
 	/** Log Level for Next ID Call					*/
 	private static final Level LOGLEVEL = Level.ALL;
 	
+	
 	/**
 	 *	Get next number for Key column = 0 is Error.
 	 *  @param AD_Client_ID client
@@ -48,6 +53,30 @@ public class MSequence extends X_AD_Sequence
 	{
 		if (TableName == null || TableName.length() == 0)
 			throw new IllegalArgumentException("TableName missing");
+		
+		//get from server
+		if (DB.isRemoteObjects())
+		{
+			Server server = CConnection.get().getServer();
+			try
+			{
+				if (server != null)
+				{	//	See ServerBean
+					int id = server.getNextID(AD_Client_ID, TableName, trxName);
+					s_log.finest("server => " + id);
+					if (id < 0)
+						throw new DBException("No NextID");
+					return id;
+				}
+				s_log.log(Level.SEVERE, "AppsServer not found - " + TableName); 
+			}
+			catch (RemoteException ex)
+			{
+				s_log.log(Level.SEVERE, "AppsServer error", ex);
+			}
+			//	Try locally
+		}
+		
 		int retValue = -1;
 
 		//	Check AdempiereSys
@@ -146,7 +175,8 @@ public class MSequence extends X_AD_Sequence
 				pstmt = null;
 				conn.setAutoCommit(autocommit); //jz set back
 				//
-			//	conn.close();
+				if (trx == null && conn != null)
+					conn.close();
 				conn = null;
 				//
 				break;		//	EXIT
@@ -241,6 +271,28 @@ public class MSequence extends X_AD_Sequence
 		if (TableName == null || TableName.length() == 0)
 			throw new IllegalArgumentException("TableName missing");
 
+		//get from server
+		if (DB.isRemoteObjects())
+		{
+			Server server = CConnection.get().getServer();
+			try
+			{
+				if (server != null)
+				{	//	See ServerBean
+					String dn = server.getDocumentNo (AD_Client_ID, TableName, trxName);
+					s_log.finest("Server => " + dn);
+					if (dn != null)
+						return dn;
+				}
+				s_log.log(Level.SEVERE, "AppsServer not found - " + TableName); 
+			}
+			catch (RemoteException ex)
+			{
+				s_log.log(Level.SEVERE, "AppsServer error", ex);
+			}
+		}
+		
+		//local
 		//	Check AdempiereSys
 		boolean adempiereSys = Ini.isPropertyBool(Ini.P_ADEMPIERESYS);
 		if (adempiereSys && AD_Client_ID > 11)
@@ -344,7 +396,7 @@ public class MSequence extends X_AD_Sequence
 			if (trx == null)
 			{
 				conn.commit();
-			//	conn.close();
+				conn.close();
 			}
 			conn = null;
 		}
@@ -359,8 +411,8 @@ public class MSequence extends X_AD_Sequence
 			if (pstmt != null)
 				pstmt.close();
 			pstmt = null;
-		//	if (conn != null && trx == null)
-		//		conn.close();
+			if (trx == null && conn != null)
+				conn.close();
 			conn = null;
 		}
 		catch (Exception e)
@@ -397,7 +449,30 @@ public class MSequence extends X_AD_Sequence
 		{
 			s_log.severe ("C_DocType_ID=0");
 			return null;
-		}
+		}
+		
+		//get from server
+		if (DB.isRemoteObjects())
+		{
+			Server server = CConnection.get().getServer();
+			try
+			{
+				if (server != null)
+				{	//	See ServerBean
+					String dn = server.getDocumentNo (C_DocType_ID, trxName);
+					s_log.finest("Server => " + dn);
+					if (dn != null)
+						return dn;
+				}
+				s_log.log(Level.SEVERE, "AppsServer not found - " + C_DocType_ID); 
+			}
+			catch (RemoteException ex)
+			{
+				s_log.log(Level.SEVERE, "AppsServer error", ex);
+			}
+		}
+		
+		//local
 		MDocType dt = MDocType.get (Env.getCtx(), C_DocType_ID);	//	wrong for SERVER, but r/o
 		if (dt != null && !dt.isDocNoControlled())
 		{
@@ -504,7 +579,7 @@ public class MSequence extends X_AD_Sequence
 			if (trx == null)
 			{
 				conn.commit();
-			//	conn.close();
+				conn.close();
 			}
 			conn = null;
 		}
@@ -519,8 +594,8 @@ public class MSequence extends X_AD_Sequence
 			if (pstmt != null)
 				pstmt.close();
 			pstmt = null;
-		//	if (conn != null && trx == null)
-		//		conn.close();
+			if (trx == null && conn != null)
+				conn.close();
 			conn = null;
 		}
 		catch (Exception e)

base/src/org/compiere/util/CStatement.java

@@ -21,7 +21,6 @@ import java.util.logging.*;
 
 import javax.sql.*;
 
-import org.compiere.Adempiere;
 import org.compiere.db.*;
 import org.compiere.interfaces.*;
 
@@ -30,6 +29,12 @@ import org.compiere.interfaces.*;
  *	
  *  @author Jorg Janke
  *  @version $Id: CStatement.java,v 1.3 2006/07/30 00:54:36 jjanke Exp $
+ *  ---
+ *  Modifications: Handle connections properly
+ *                 Close the associated connection when the statement is closed 
+ *  Reason       : Due to changes brought in the connection pooling whereby the system 
+ *                 no more relies upon abandoned connections.
+ *  @author Ashley Ramdass (Posterita)
  */
 public class CStatement implements Statement
 {
@@ -742,8 +747,16 @@ public class CStatement implements Statement
 	 */
 	public void close () throws SQLException
 	{
-		if (p_stmt != null)
-			p_stmt.close();
+        if (p_stmt != null)
+        {
+            Connection conn = p_stmt.getConnection();
+            p_stmt.close();
+            
+            if (!conn.isClosed() && conn.getAutoCommit())
+            {
+                conn.close();
+            }
+        }
 	}	//	close
 
 	/*************************************************************************
@@ -770,15 +783,25 @@ public class CStatement implements Statement
 			log.log(Level.SEVERE, p_vo.toString(), ex);
 			throw new RuntimeException (ex);
 		} 
-		finally {
-			if (pstmt != null)
-			{
-				try 
-				{
-					pstmt.close();
-				} catch (SQLException e){}
-				pstmt = null;
-			}
+		finally
+        {
+            if (pstmt != null)
+            {
+                try 
+                {
+                    Connection conn = pstmt.getConnection();
+                    pstmt.close();
+                    if (p_vo.getTrxName() == null && !conn.isClosed())
+                    {
+                        conn.close();
+                    }
+                }
+                catch (SQLException e)
+                {
+                    log.log(Level.SEVERE, e.getMessage(), e);
+                }
+                pstmt = null;
+            }
 		}
 	}	//	remote_executeUpdate
 
@@ -811,15 +834,30 @@ public class CStatement implements Statement
 		catch (SQLException ex)
 		{
 			log.log(Level.SEVERE, "local", ex);
-			try
-			{
-				if (stmt != null)
-					stmt.close();
-				stmt = null;
-			}
-			catch (SQLException ex1)
-			{
-			}
+            if (stmt != null)
+            {
+                try
+                {
+                    stmt.close();
+                }
+                catch (Exception e)
+                {
+                    log.log(Level.SEVERE, "Could not close statement", e);
+                }
+                stmt = null;
+            }
+            
+            if (conn != null && p_vo.getTrxName() == null)
+            {
+                try
+                {
+                    conn.close();
+                }
+                catch (Exception e)
+                {
+                    log.log(Level.SEVERE, "Could not close connection", e);
+                }
+            }
 		}
 		return stmt;
 	}	//	local_getStatement
@@ -925,18 +963,7 @@ public class CStatement implements Statement
 		{
 			log.log(Level.SEVERE, p_vo.toString(), ex);
 			throw new RuntimeException (ex);
-		}
-		//	Close Cursor
-		try
-		{
-			if (pstmt != null)
-				pstmt.close();
-			pstmt = null;
-		}
-		catch (Exception e)
-		{
-			log.log(Level.SEVERE, "close pstmt", e);
-		}
+		}		
 		return rowSet;
 	}	//	local_getRowSet