Problem with JNDI/LDAP AND connection pool

Question

I'm a newbie to Java but am attempting to write a servlet that retrieves info use to populate the contents of drop down menus. I'd like to only have to do this once. The servlet also retrieves other data (e.g. user profile info, etc ...). I'd like to be able to use the connection pool for all of these operations but I'm getting a compile error:
public class WhitePages extends HttpServlet {
ResourceBundle rb = ResourceBundle.getBundle("LocalStrings");
public static String m_servletPath = null;
public static String cattrs = null;
public static String guidesearchlist[] = {};
public static int isLocalAddr = 0;
private int aeCtr;
private String[] sgDNArray;
private HashMap sgDN2DNLabel = new HashMap();
private HashMap sgDN2SearchGuide = new HashMap();
private String strport;
private int ldapport;
private String ldaphost;
private String ldapbinddn;
private String ldapbindpw;
private String ldapbasedn;
private int maxsearchcontainers;
private int maxsearchkeys;
private String guidesearchbases;
private String guidecontainerclass;
private String strlocaladdr;
private String providerurl;
// my init method establishes the connection
// pool and then retrieve menu data
public void init(ServletConfig config) throws ServletException {
super.init(config);
String strport = config.getInitParameter("ldapport");
ldapport = Integer.parseInt(strport);
String strconts = config.getInitParameter("maxsearchcontainers");
maxsearchcontainers = Integer.parseInt(strconts);
String strkeys = config.getInitParameter("maxsearchkeys");
maxsearchkeys = Integer.parseInt(strkeys);
ldaphost = config.getInitParameter("ldaphost");
ldapbinddn = config.getInitParameter("ldapbinddn");
ldapbindpw = config.getInitParameter("ldapbindpw");
ldapbasedn = config.getInitParameter("ldapbasedn");
guidesearchbases = config.getInitParameter("guidesearchbases");
guidecontainerclass = config.getInitParameter("guidecontainerclass");
strlocaladdr = config.getInitParameter("localaddrs");
providerurl = "ldap://" + ldaphost + ":" + ldapport;
/* Set up environment for creating initial context */
Hashtable env = new Hashtable(11);
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, providerurl.toString());
/* Enable connection pooling */
env.put("com.sun.jndi.ldap.connect.pool", "true");
StringTokenizer st = new StringTokenizer(guidesearchbases, ":" );
String guidesearchlist[] = new String[st.countTokens()];
for ( int i = 0; i < guidesearchlist.length; i++ ) {
guidesearchlist[i] = st.nextToken();
// Get a connection from the connection pool
// and retrieve the searchguides
StringBuffer asm = new StringBuffer(""); // This is the advanced search menu htmlobject buffer
StringBuffer strtmpbuf = new StringBuffer(""); // This is the simple search menu htmlobject buffer
try {
StringBuffer filter = new StringBuffer("");
filter.append("(objectclass=" + guidecontainerclass + ")");
String[] attrList = {"dn","cn","searchguide"};
SearchControls ctls = new SearchControls();
ctls.setReturningAttributes(attrList);
ctls.setSearchScope(SearchControls.SUBTREE_SCOPE);
String attrlabelkey;
sgDNArray = new String[guidesearchlist.length];
for( int i = 0; i < guidesearchlist.length; i++ ) {
// Search each of the namingspaces where
// searchguides exist then build
// the dynamic menus from the result
DirContext ctx = new InitialDirContext(env);
NamingEnumeration results = ctx.search(guidesearchlist, filter, ctls);
I get a compile error:
WhitePages.java:164: cannot resolve symbol
symbol : method search (java.lang.String,java.lang.StringBuffer,javax.naming.directory.SearchControls)
location: interface javax.naming.directory.DirContext
NamingEnumeration results = ctx.search(guidesearchlist[i], filter, ctls);
^
WhitePages.java:225: cannot resolve symbol
symbol : variable ctx
location: class OpenDirectory
ctx.close();
^
Can anyone help? If there is someone out there with JNDI connection pool experience I would appreciate your assistance!

Answer 1

Manish
The issue may not be related to the number of connections or the initial
connections. Check your heap size (ms, mx). Turn on verbosegc. Your heap may
not be big enough to accept the 25,000 rows.
Bernie
"Manish Kumar Singh" <[email protected]> wrote in message
news:3e6c34ca$[email protected]..
We are creating the result set with 25000 rows(each row has 56 columns) bygetting the connection using data source. With the initial capacity of the
connection pool is 5 and the max capacity as 30 and grow connection as 1,
the server gets out of memory exception, when we issue a new request, even
after closing the previous connections.
Now, if we change the initial capacity to 1 and rest all the things assame, the issue gets resolved and the server works fine.
Could you please help me out in this regard????
thanks in advance
manish