Tomcat Users:
I've been fighting with some version differences in tom cat wondering why my
app acts severly different on Tomcat 4.1.27 then 4.0.6. It appears that
4.1.27 is not working from my perspective, and have been fighting with it
since monday. None of the books I have touch this subject or ellude to the
problem, and I've seached high and low for solutions.
I'm having a problem working with my custom tag library. The stange part to
this is it appears to work on tomcat 4.0.6 but not on 4.1.27. The library
has a tage called site that extends a base tag, and those tags use other
classes in my data namespace to hit a database.
The tags are returning the proper data in both versions, but in 4.1.27, I
have to "reload" the contect in the manager for it to "register" the changes
from the database. I have added some printlns to std out to track what's
going on. In tomcat 4.0.6 they are going through all the code as I would
exspect it to. I have included each of the class files that are called. I
have also included the printouts from both versions of tomcat to clierify
how each version is handling the calls.
The object hiarchey goes as follows:
jPublish.Tags site extends inc_tag.
jPublish.Data.site_manager extends jPublish.Data.manager, managers contain,
load, and fill datas.
jPublish.Data.site_data extends jPublish.Data.data, used for storing data
and tracking updates.
--- INDEX.JSP ---
<%@ page contentType="text/html" %>
<%@ taglib prefix="inc" uri="inc" %>
<inc:site site="1" action="none"/>
<html>
<head><title><inc:site action="title" /></title></head>
<body>
<h1>Welcome to <inc:site action="title"/>!</h1>
© <inc:site action="copyright"/>
</body>
</html>
--- TOMCAT 4.0.6 STDOUT ---
Starting service Tomcat-Standalone
Apache Tomcat/4.0.6
Starting service Tomcat-Apache
Apache Tomcat/4.0.6
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Shawn
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- TOMCAT 4.1.27 STDOUT: db INC then Shawn ---
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Data.manager()
jPublish.Tags.site()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.inc_tag.loaded(): not instance
jPublish.Data.manager.load()
jPublish.Tags.inc_tag.loaded(): load ok
jPublish.Tags.inc_tag.loaded(): next ok
jPublish.Tags.inc_tag.loaded(): reached fill.
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
<Change INC to Shawn in DB>
jPublish.Tags.site.setSite()
jPublish.Data.manager()
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
Internetwork Consulting
jPublish.Tags.site.doEndTag(): End
jPublish.Tags.site.doEndTag(): Begin
jPublish.Tags.inc_tag.loaded()
jPublish.Tags.site.loaded()
INC
jPublish.Tags.site.doEndTag(): End
--- SITE TAG "inc:site" ---
package jPublish.Tags;
import jPublish.Data.*;
public class site extends inc_tag {
private site_data objSite;
// Constructors
////////////////////////////////////////////////////////////
public site() {
objManager = (manager) new site_manager();
System.out.println("jPublish.Tags.site()");
}
// Properties
//////////////////////////////////////////////////////////////
public void setSite(String strNew) {
System.out.println("jPublish.Tags.site.setSite()");
objManager = (manager) new site_manager();
objManager.setWhere("id = " + strNew);
}
// Methods
/////////////////////////////////////////////////////////////////
protected boolean loaded() {
if(super.loaded()) {
objSite = (site_data) objData;
System.out.println("jPublish.Tags.site.loaded()");
return true;
} else
return false;
}
public int doEndTag() {
System.out.println("jPublish.Tags.site.doEndTag(): Begin");
if(strAction.equalsIgnoreCase("id"))
if(loaded()) print(Long.toString(objSite.getID()));
if(strAction.equalsIgnoreCase("design"))
if(loaded()) print(Long.toString(objSite.getDesign()));
if(strAction.equalsIgnoreCase("title"))
if(loaded()) print(objSite.getTitle());
if(strAction.equalsIgnoreCase("webmaster"))
if(loaded()) print(objSite.getWebmaster());
if(strAction.equalsIgnoreCase("email"))
if(loaded()) print(objSite.getEmail());
if(strAction.equalsIgnoreCase("copyright"))
if(loaded()) print(objSite.getCopyright());
if(strAction.equalsIgnoreCase("logo"))
if(loaded()) print(objSite.getLogo());
if(strAction.equalsIgnoreCase("next"))
if(objManager.next()) return this.EVAL_BODY_AGAIN;
System.out.println("jPublish.Tags.site.doEndTag(): End");
return this.SKIP_BODY;
}
}
--- INC_TAG ---
package jPublish.Tags;
import jPublish.Data.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public abstract class inc_tag extends TagSupport {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
protected data objData;
protected String strWhere;
// Action Data
protected String strAction = "none";
private String strOutput = "none";
// Properties
//////////////////////////////////////////////////////////////
public void setAction(String strNew) { strAction = strNew; }
public void setOutput(String strNew) { strOutput = strNew; }
public manager getManager() { return objManager; }
// Internal Methods
////////////////////////////////////////////////////////
protected boolean loaded() {
System.out.println("jPublish.Tags.inc_tag.loaded()");
if(!(objData instanceof data)) {
System.out.println("jPublish.Tags.inc_tag.loaded(): not
instance");
if(objManager.load()) {
System.out.println("jPublish.Tags.inc_tag.loaded():
load ok");
if(objManager.next()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): next ok");
if(objManager.fill()) {
System.out.println("jPublish.Tags.inc_tag.loaded(): reached fill.");
objData = objManager.getData();
return true;
} else
return false;
}
} else
return false;
}
// Data Exist: Loaded
return true;
}
protected void print(String strOut) {
JspWriter out = pageContext.getOut();
System.out.println(strOut);
try { out.print(format(strOut)); }
catch (Exception e) { System.out.println("Exception error: " + e); }
}
protected String format(String strIn) {
String strTemp = new String();
char cTemp;
// String Safe
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
strTemp += "\\\'";
break;
case '\"':
strTemp += "\\\"";
break;
case '\\':
strTemp += "\\\\";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// Strip String
if(strOutput.equalsIgnoreCase("stringsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '\'':
break;
case '\"':
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// HTML Safe
if(strOutput.equalsIgnoreCase("htmlsafe")) {
for(int iCnt = 0; iCnt < strIn.length(); iCnt++) {
cTemp = strIn.charAt(iCnt);
switch(cTemp) {
case '<':
strTemp += "<";
break;
case '>':
strTemp += ">";
break;
default:
strTemp += cTemp;
break;
}
}
return strTemp;
}
// None
return strIn;
}
}
--- DATA.SITE_MANAGER ---
package jPublish.Data;
public class site_manager extends manager {
// Constructors
////////////////////////////////////////////////////////////
public site_manager() {
super();
super.setTable("sites");
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean fill() {
site_data dataNew = new site_data();
try {
dataNew.setID(sqlResults.getLong("id"));
dataNew.setDesign(sqlResults.getLong("design"));
dataNew.setTitle(sqlResults.getString("title"));
dataNew.setWebmaster(sqlResults.getString("webmaster"));
dataNew.setEmail(sqlResults.getString("email"));
dataNew.setCopyright(sqlResults.getString("copyright"));
dataNew.setLogo(sqlResults.getString("logo"));
dataNew.setManager((manager) this);
dataNew.setLoaded();
objData = (data) dataNew;
return true;
}
catch (Exception e) {
strError = "Exception error: " + e;
}
return false;
}
}
--- DATA.SITE_DATA ---
package jPublish.Data;
public class site_data extends data {
// Data Menebers
///////////////////////////////////////////////////////////
private long lDesign;
private String strTitle;
private String strWebmaster;
private String strEmail;
private String strCopyright;
private String strLogo;
// Child Relationships
private section_manager objSections;
// Parent Relationships
private design_manager objDesigns;
// Constructors
////////////////////////////////////////////////////////////
public site_data() { super(); }
// Properties
//////////////////////////////////////////////////////////////
public boolean setDesign(long lNew) {
if(lNew > 0) {
lDesign = lNew;
objUpdates.set("design", Long.toString(lNew));
return true;
}
return false;
}
public boolean setTitle(String strNew) {
if(strNew.length() > 0) {
strTitle = strNew;
objUpdates.set("title", strNew);
return true;
}
return false;
}
public boolean setWebmaster(String strNew) {
if(strNew.length() > 0) {
strWebmaster = strNew;
objUpdates.set("webmaster", strNew);
return true;
}
return false;
}
public boolean setEmail(String strNew) {
if(strNew.length() > 0) {
strEmail = strNew;
objUpdates.set("email", strNew);
return true;
}
return false;
}
public boolean setCopyright(String strNew) {
if(strNew.length() > 0) {
strCopyright = strNew;
objUpdates.set("copyright", strNew);
return true;
}
return false;
}
public boolean setLogo(String strNew) {
if(strNew.length() > 0) {
strLogo = strNew;
objUpdates.set("logo", strNew);
return true;
}
return false;
}
public long getDesign() { return lDesign; }
public String getTitle() { return strTitle; }
public String getWebmaster() { return strWebmaster; }
public String getEmail() { return strEmail; }
public String getCopyright() { return strCopyright; }
public String getLogo() { return strLogo; }
// Child Relationships
public section_manager getSections() {
if(!(objSections instanceof section_manager)) {
objSections = new section_manager();
objSections.setWhere("site = " + this.getID());
objSections.load();
}
return objSections;
}
// Parent Relationships
public design_manager getParentDesign() {
if(!(objDesigns instanceof design_manager)) {
objDesigns = new design_manager();
objDesigns.setWhere("site = " + this.getDesign());
objDesigns.load();
}
return objDesigns;
}
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.MANAGER ---
package jPublish.Data;
import java.sql.*;
public abstract class manager extends Object {
// Data Members
////////////////////////////////////////////////////////////
protected data objData;
protected String strError = new String();
// SQL Options
private String strTable = new String();
private String strWhere = new String();
// Data SQL Connection
protected Connection sqlConnection;
protected Statement sqlStatement;
protected ResultSet sqlResults;
// Constructors
////////////////////////////////////////////////////////////
manager() {
System.out.println("jPublish.Data.manager()");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
sqlConnection = DriverManager.getConnection(
"jdbc:mysql://localhost/jPublish", "root", "");
sqlStatement = sqlConnection.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
}
catch (Exception e) {
strError = "Execption error: " + e;
}
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setTable(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
strTable = strNew;
return true;
} else
return false;
}
public boolean setWhere(String strNew) {
if((strNew instanceof String) && (strNew.length() > 0)) {
if(strWhere.length() > 0)
strWhere += " AND " + strNew;
else
strWhere = strNew;
return true;
} else
return false;
}
public data getData() { return objData; }
public String getError() { return strError; }
public String getTable() { return strTable; }
public String getWhere() { return strWhere; }
public int getCount() {
int iCurr = -1;
int iLast = -1;
try {
iCurr = sqlResults.getRow();
sqlResults.last();
iLast = sqlResults.getRow();
sqlResults.absolute(iCurr);
}
catch (Exception e) { strError = "Exception Error: " + e; }
return iLast;
}
// Methods
/////////////////////////////////////////////////////////////////
public boolean load() {
String strQuery = "";
System.out.println("jPublish.Data.manager.load()");
// Build the Query
strQuery = strQuery + "SELECT * ";
strQuery = strQuery + " FROM " + strTable;
if(strWhere.length() > 0)
strQuery = strQuery + " WHERE " + strWhere;
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean loadFrom(String strTable, String strColumn) {
String strQuery = "";
// Build the Query
strQuery = strQuery + "SELECT " + this.strTable + ".* ";
strQuery = strQuery + " FROM " + strTable + ", " + this.strTable;
strQuery = strQuery + " WHERE " + strTable + "." + strColumn;
strQuery = strQuery + " = " + this.strTable + ".id;";
// Get Results
try {
sqlResults = sqlStatement.executeQuery(strQuery);
}
// Get Errors
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
return true;
}
public boolean next() {
try { return sqlResults.next(); }
catch (Exception e) {
strError = "Exception error: " + e;
return false;
}
}
public boolean save() {
// Create Varibles
updates objUpdates = objData.getUpdates();
Object[] arrKeys = objUpdates.getKeys();
try {
// Update Record
for(int iCnt = 0; iCnt < arrKeys.length; iCnt++)
sqlResults.updateString(arrKeys[iCnt].toString(),
objUpdates.get(arrKeys[iCnt].toString()));
// Write Changes
if(objData.getID() > 0)
sqlResults.updateRow();
else
sqlResults.insertRow();
}
// Update Errors
catch (Exception e) {
// Set Error
strError = "Exception error: " + e;
return false;
}
return true;
}
// Abstract Functions
//////////////////////////////////////////////////////
// These must be implimented since the extended object only know the
tables.
public abstract boolean fill();
}
--- DATA.DATA ---
package jPublish.Data;
public abstract class data extends Object {
// Data Menebers
///////////////////////////////////////////////////////////
protected manager objManager;
// Update Tracking
protected updates objUpdates;
// Data
protected long lID;
// Constructors
////////////////////////////////////////////////////////////
data () {
objUpdates = new updates();
}
// Properties
//////////////////////////////////////////////////////////////
public boolean setManager(manager manNew) {
if(manNew != null) {
objManager = manNew;
return true;
}
return false;
}
public boolean setLoaded() { return objUpdates.setUpdated(); }
public manager getManager() { return objManager; }
public updates getUpdates() { return objUpdates; }
// Data Properties
public boolean setID(long lNew) {
if(lNew > 0) {
lID = lNew;
objUpdates.set("id", Long.toString(lNew));
return true;
}
return false;
}
public long getID() { return lID; }
}
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