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Changeset 16630

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Timestamp:
2008-08-01 14:18:07 (4 months ago)
Author:
xiao
Message:

modify to synchronize method executeQuery

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

    r16260 r16630  
    6363        try{ 
    6464                connection.setAutoCommit(false);         
    65             statement = connection.createStatement(); 
     65               statement = connection.createStatement(); 
    6666        } 
    6767        catch(SQLException sqle){ 
    …… 
    7373 
    7474    //return a list of rows array->hashmap 
    75     public ArrayList executeQuery(String query_statement){ 
     75    public synchronized ArrayList executeQuery(String query_statement){ 
    7676        //the database hasn't been correct yet 
    77         ArrayList results = null; 
     77        ArrayList results = new ArrayList(); 
    7878    try{         
    7979         
    …… 
    8282                return new ArrayList(); 
    8383        } 
    84          
    85         results = new ArrayList(); 
    86  
    8784         
    8885        ResultSet rs = statement.executeQuery(query_statement);