Changeset 16630 for greenstone3

Timestamp:

2008-08-01T14:18:07+12:00 (16 years ago)

Author:

xiao

Message:

modify to synchronize method executeQuery

File:

• greenstone3/trunk/src/java/org/greenstone/gsdl3/sql/derby/DerbyDBWrapper.java (modified) (3 diffs)

greenstone3/trunk/src/java/org/greenstone/gsdl3/sql/derby/DerbyDBWrapper.java

@@ -63 +63 @@
     try{
         connection.setAutoCommit(false);    
-        statement = connection.createStatement();
+        statement = connection.createStatement();
     }
     catch(SQLException sqle){
@@ -73 +73 @@
 
     //return a list of rows array->hashmap
-    public ArrayList executeQuery(String query_statement){
+    public synchronized ArrayList executeQuery(String query_statement){
     //the database hasn't been correct yet
-        ArrayList results = null;
+        ArrayList results = new ArrayList();
     try{    
         
@@ -82 +82 @@
             return new ArrayList();
         }
-    
-        results = new ArrayList();
-
     
         ResultSet rs = statement.executeQuery(query_statement);