Can java code be called??

Can method written in java be called from a method written in c++??. that is c++ program can call a java method and how??

Can method written in java be called from a method
written in c++??. that is c++ program can call a java
method and how??The Java Invocation API:
http://java.sun.com/docs/books/jni/html/invoke.html#11202

Similar Messages

Best place in VOimpl java code to call a stored proc to populate results

Hello all,
Using JDev 11g, ADF BC and Trinidad.
I am building an application that is primarily used for searching large amounts of data. We already have stored procedures on the database that perform the searches and dump the results into a holding table (together with a "search id"). I have easilly built a prototype of this application: my view object is simply "select a, b, c from results where search_id = :bv" - I have a service method in the AM that runs the stored procedure, obtains the search ID, binds it to the :bv in the VO and executes the VO's query - it's all working really nicely. Range paging is effective, the VO itself performs well, and I am able to control how long the stored proc runs via setting a timeout value.
Now, I'd like to generalize this. My thinking is this:
1). I'll add a custom property to my VO that is the SQL statement needed to call the stored procedure.
2). I'll add some bind variables to the VO to represent all the query parameters that can be passed to the stored proc. I'll also use custom properties to indicate these are "fake" bvs, and not in the SQL query itself.
3). The VO's SQL will remain simply "select a, b, c from results where search_id = :bv"
4). I will (have already tested) override bindParametersForCollection so that the "fake" bind variables aren't bound into the SQL.
Now, the question: I want to override some method in the VO's java code to call the stored procedure. The stored proc needs to be called before the actual query for the VO is run, and also before the method getQueryHitCount is called (so that the count is correct). What is the method that would be the "best" place to do this? My current thinking is that I would put the call in an over-ridden executeQueryForCollection call. As far as my analysis has gone, it seems to be always called before getQueryHitCount, but I have no way of knowing if this is completely safe.
Any thoughts from the BC experts out there?
Best regards,
John

John,
from your description I understand that you essentially program the VO yourself. So I suggest that you read chapter 35.9 of the 'Fusion Developer’s Guide for Oracle Application Development Framework' (I guess you know where to find it). Since you still call the actual SQL not all of the chapter apply, but you get the idea how it works.
And yes you analyzed the behavior correct. executeQueryForCollection() is allways called bevore getQueryHitCount().
Timo

Java code for calling xslt mapping in module?

Hi,
We have 2 mapping(xslt) in IR
source->cannonical and cannonical->target
we want to remove source->cannonical mapping and want to put that in MODULE of communication channel.
My problem is how to call xslt mapping using java code and we done value mapping their. Did that vallumapping will work in module..
waiting for responce..its an urgent task..
thanq
krishna

You can use the MessageTransformBean to run the XSLT in the adapter framework:
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/3823 [original link is broken] [original link is broken] [original link is broken]
I do not know, if the value mapping works here. Maybe you just give a try.
Regards
Stefan

Can java code be compiled as an o. file and how?

Some langyages produce o. files during the compiling process. Can Java do that?

Some langyages produce o. files during the compiling
process. Can Java do that?No, the Java compiler produces .class files. .o files contain binary
date to be natively linked into an executable. .class files are loaded by
the JVM and run by it.
kind regards,
Jos

Java code to call methods in .ocx file

dear friends,
i have an .ocx file with me which is used to communicate with a specific device.it is an already existing one. i wish to know whether i can call method sin that .ocx file using java .using vb6 we can do this.
if it is possible with java i wish to know how i can do this.please consider this query and please send me your responses. i know that using jni we can communicate with .dll files.but i am not sure about .ocx file. please help me.
thank you
arun

i wish to know whether i can call method sin that .ocx file using java
Probably
db

Can we call Plain JAVA Code online via MDM Cient

Hi SDNers,
For some validation purpose i need to write a JAVA Code(Some body told me that it can be possible i.e we can Java Code for doing Validation)
i have two Questions.
1. Can we call JAVA Code online via MDM Client.
2. where i have to write this JAVA Code and what will be steps of writing this Code.
Thanx in Advance.

Hi Tanveer,
Thanx a lot for ur prompt reply
Pls reply my this Question also promptly i will be highly thankful for it.
Q.
My Requirment is i have to do the validation
"on the basis of acct grp i have to put validation
      a. the G/L acct must be in particular range.
      b. it must have specific length"
My sr. developer is saying simply putting the IF ELSE condition in the validation Editor technique 'ld be hard to maintain at later stage as we large number of Acct Grps.
He is saying look for some Custom function for it
"SO TELL ME CLEARLY THAT
                                               --CAN I USE JAVA API FOR THIS
                                               --AS A EXP. MDM CONSULTANT WILL U
                                                  RECOMMEND IT?
                                               --IF YES
                                                 THEN
                                                      WHAT 'LD BE EXACT STEPS.
                                             ---IF NO
                                                THEN
                                                     WHAT ARE THE OTHERS WAYS
                                                     i.e
                                                     IF U R FACING THIS PROBLEM THEN WAT
                                                     SOLN U R GOING TO USE?
PLS
REPLY ASAP as per the exact question(i.e all parts of Q)
i will highly thank for u.
Regards
kuldeep

Calling a javascript function from java code and getting tha value in Java

Hi,
I would like to call a Java script function confirmRemove() from Java code upon meeting a condition..
for example the code snippet is:
if(true){
// I want to call js confirmRemove() over here. And get the value of variable "answer" in this if block.
<html>
<head>
<script type="text/javascript">
function confirmRemove() {
var answer = confirm("Are you sure you want to Delete?")
</script>
</head>
<body>
<form>...

Hi,
Back in 2003 I have used an Applet which contain java code and this java code was calling the java scripts ( different methods, DHTML etc..)
There was a component developed by NetScape called JSObject I am not sure it there is other third party component other then the JSObject
look at this article which shows how (based on JSObject)
[http://java.sun.com/products/plugin/1.3/docs/jsobject.html|http://java.sun.com/products/plugin/1.3/docs/jsobject.html]
Regards,
Alan Meio
London,UK

How to Increase Java Heap Size through Java Code. Increase inside Code?

Hi All,
I am using a third party tool. When i run a particular program it says OutOfMemory error. I like to increase heap size through Java Code before calling the particular Java application or Code..
Is there is any way to set the Heap Size through Java Code in run time ???
Pls Kindly help.
Thanks.

if you start the program with a -Xmx512m flag, the virtual machine gets half a gigabyte of memory to use (or that's the max it's allowed to use). All things run in the same virtual machine will have the same limit, third party tools run in the same virtual machine can't "not care about this" unless they're throwing OOMs themselves for some stupid reason.

Some java code returns a null resultset from 10.2.0.1 DB, but works w/ 9.2

I am a Java noob guys, but we have java code the calls an Oracle Function. This code is unchanged from what successfully runs against an Oracle 9.2 database returning, in this case, one row from the database. A ref cursor is used. When the same Java code calls the same ref cursor function from a 10.2.0.1 database, a null resultset occurs. The function correctly returns a single row when executed by the same database user via sql-plus. So it must be a java thing. Does the jdbc driver need to be upgraded to correctly run against a 10.2 database? And is this null resultset type of anomaly a potential result of having a wrong version of ojdbc14.jar? Nothing else has changed except pointing the code to the same package and tables in a 10.2 database.
Thanks in advance for your comments.
Phil McDermott

I realize now that this is the wrong forum to post in, but I was linked here from a google search on the issue.
I downloaded the 10.2.0.1 ojdbc14.jar from oracle, but the problem persists.
yeesh! now what?

Can we call DLL method in jave code

hi,
can we call DLL file method in java Code or program.

See
http://forum.java.sun.com/thread.jsp?forum=52&thread=179765

How to call Java script from java code?Can Jscript be executed at server?

Hi All,
We are using 'WebTrends' tool to analyze our site usage pattern.
To use WebTrends, we need to :
1) call Java Script code from the java code
2)Java script has to be executed at server.
Please comment on two points mentioned above. If yes, please let me know how to do them?
Thanks in advnce,
Regards,
Ganga

You can check out Rhino project.
[http://www.mozilla.org/rhino/]

How can I call a C program or call a C function in my JAVA code?

Could I call a C program or a C function in my JAVA code?
somebody told me that I should define a native() method, but what should I do in this native() method?
could u give me an example?
thanks in advance.

Maybe these will give a clue:
http://java.sun.com/docs/books/tutorial/native1.1/index.html
http://java.sun.com/j2se/1.3/docs/guide/jni/

Can MySQL triggers or storedprocedures(callbacks) call java code?

I have to store the DB tables in the server side(i.e cache it) If someone updates the Data Base , The Data updates must be reflected in the cache in the server side. so how callbacks form the DB can be make to a java code in the server side.
i am using Ms SQL and web logic server.
or which DB and APP server can support it?

Do the update request from the client via an java application(servlet,etc.) to an server application. The server application work with the db (via jdbc) and can so update the cache if any db update occurs.

How i can set the selected item of a dropDown component from java code

Hi
Thank you for reading my post
How i can set the slected item of a DropDown component from backing beans java code ?
it is binded with a database , so one field determine its display and one other field determine its value , I want to set the selected item of this combobox
In back code i have both value and display values to use them .
can some one give me some help ?
Thanks ,

See code sample 3 at http://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/2/helloweb.html
See also, the selection components row in the table under http://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/2/helloweb.html
It says
One way to preselect items is to call setSelectedValue(Object[]) or setSelectedValue(Object) from the prerender() method. You pass in the return values of the items that you want preselected. Be sure to verify that getSelected() returns null before setting the default options, or you will overwrite the user's selections on a post-back.

How to call a shell script from a java code

Hello can any one suggest me how to call a shell script from a java program that takes three parameters.
i have a shell script (msp_restore_gui) when i run this script in the command line in a RHEL5 ,SUSE10 and Debian machine it works fine .I even tested to call it from a java program and it also worked fine but when i used the same in a J2ee application where the user when clicks the restore button in a webserver this inturn sends the request to a java file named BackupManager.java where i call the shell script.But here it fails.Waiting for your suggestions.If you want i can put the code also here

yes the script is in /usr/local/mss/tools/backup and the script (msp_restore_gui) is as follows
#!/bin/sh
TIMESTAMP=`date +%d_%b_%y-%H-%M`
touch /var/backups/mss/mss_restore_"$TIMESTAMP".log
LOGFILE="/var/backups/mss/mss_restore_"$TIMESTAMP".log"
### Explode tgz file
cd /
# Checks to be done:
# root login
# assume he passes the parameter as msp_backup_<timestamp>
# check for the existence of the .tz and fileList.txt
# Checking for the root login and if not logged on as root
# permission will be denied to execute this script
logmsg(){
echo "`date`: $*" >> $LOGFILE 2>&1
echo "$*"
#usage of this script
while [ $# -ne 0 ]
do
case $1 in
-n)
shift
ARCHIVE_NAME=`find / $ -name "$1.tz" -o -name "$1.tgz" $ 2>/dev/null`
FILE_NAME=`find / -name $1_filesList.txt 2>/dev/null`
if [ x$ARCHIVE_NAME = x -a y$FILE_NAME = y ]
then
logmsg "ERROR: Files not found, Restore cannot proceed"
usage
else
tar tvzf $ARCHIVE_NAME > /dev/null 2>&1
if [ $? -ne 0 ]
then
echo "ERROR: The tar file $ARCHIVE_NAME is not proper. Restore cannot proceed"
exit 1
else
          echo "Backedup files are present, proceeding with restore......" >> $LOGFILE 2>&1
fi
fi
usage
SKIP_CLEANUP=1
STATUS=1
exit
esac
shift
done
rm -rf ./newfile
curr_ver_file="/usr/local/mss/etc/version"
/usr/local/mss/tools/backup/check_version $curr_ver_file $FILE_NAME
ret_code=$?
echo "Exit value of check_version is $ret_code"
if [ "$ret_code" != 0 ]
then
logmsg "MSP Version not matching. Exiting from restore now...."
errormsg=`cat /usr/local/mss/temp/ver_err_mesg`
logmsg $errormsg
rm -f /usr/local/mss/temp/ver_err_mesg
exit 1
else
echo "Version check is successful"
fi
#### ShutDown MSS########
/etc/init.d/mss stop
sleep 2
### Shutdown semm
/etc/init.d/semm stop
sleep 2
rm -rf `grep -v "MSP Version:" $FILE_NAME`
logmsg "MSP restore in progress......"
tar mxvfz $ARCHIVE_NAME >> $LOGFILE
sleep 5
### Call mysql restore script
/usr/local/mss/bin/mysql_alldb_restore.sh >> $LOGFILE 2>&1
if [ $? -ne 0 ]; then
logmsg "Database restore Failed. Cannot proceed further"
exit 1 ;
else
logmsg "Database restore Succeeded."
fi
### Remove DB Dump Files
rm -f /var/lib/mysql-dumps/*
### Trigger cleanup of airprism database tables
#touch /usr/local/mss/airprism/server/config/reinitdb
### Trigger re-import of software packages
touch /usr/local/mss/swdepot/reimport
### Remove log files under the "apps" directory
find /usr/local/mss/apps -name '*.log*' | xargs rm -f
find /usr/local/mss/logs -follow -name '*[._]log*' | xargs rm -f
if [ $? -ne 0 ]; then
logmsg "MSP restore Failed. Cannot proceed further"
exit 1 ;
else
logmsg "MSP restore Succeeded."
fi
# reinstall_patch is touched so that patches are re-installed after restoring of MSP.
touch /usr/local/mss/patch/bin/reinstall_patch
##### Start MSS
logmsg "restarting MSP server "
/etc/init.d/mss start
sleep 5
### Start semm
/etc/init.d/semm start
sleep 5
logmsg "MSP server is now restarted"
my jsp page backup.jsp is as follows
<%@taglib uri="portlet.tld" prefix="uif" %>
<%@taglib uri="msp-console.tld" prefix="msp" %>
<uif:defineObjects/>
<%@page import="javax.portlet.*" %>
<%@ page import="java.util.Date" %>
<%@ page import="java.util.Vector" %>
<%@ page import="java.text.DateFormat" %>
<%@ page import="com.symbol.mss.console.admin.backup.BackupManager" %>
<%@ page import="com.symbol.mss.console.admin.system.SystemInfoPortlet" %>
<%
     String STYLE_NAME = request.getParameter("style");
     if (STYLE_NAME == null) STYLE_NAME = STYLE_DEFAULT;
     final String ua = request.getHeader("User-Agent");
     BackupManager helper = null;
     PortletSession portletSession = renderRequest.getPortletSession();
     helper = (BackupManager)portletSession.getAttribute("helper");
     if (helper == null) {
          //System.err.println("Created new BackupManager");
          helper = new BackupManager();
          portletSession.setAttribute("helper", helper);
     final BackupManager backupManager = helper;
     String action = "";
     final String backupName = renderRequest.getParameter("backupName");
     String completePath = backupManager.getBackupDir() + backupName + backupManager.getBackupFileExt();
     if (backupName != null) {
          action = "backup";
     if(backupManager.backup(backupName)) {
          SystemInfoPortlet.beginRestartMSP();
          } else {
               action = "backuperror";
     final String cmd = renderRequest.getParameter("submitButton");
final String selectedBackup = renderRequest.getParameter("selectedBackup");
int tarFileStatus =0;
String backupTarFile ="";
String backupFileList ="";
     if ("Restore".equals(cmd)) {
if (selectedBackup != null) {
     tarFileStatus = backupManager.verifyTarFile(selectedBackup);
     //backupTarFile = backupManager.getRestoreFile(Integer.parseInt(selectedBackup));
     //backupFileList = backupTarFile.substring(0, backupTarFile.lastIndexOf(backupManager.getBackupFileExt()))+"_filesList.txt";
               if (tarFileStatus == 0){
     action = "restore";
     backupManager.restore(selectedBackup);
                    SystemInfoPortlet.beginRestartMSP();
          } else {
               action = "error";
} else if ("Remove".equals(cmd)) {
backupManager.remove(Integer.parseInt(selectedBackup));
     DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.SHORT);
     PortletURL restoreURL = renderResponse.createActionURL();
%>
<%@ include file="/jsp/core/constants.jspf" %>
<% if (action.length() > 0) {
     if ("backup".equals(action))
%>
     <p>The MSP Appliance has been shut down in order to create the <%=backupName %> backup file,
          and will automatically restart as soon as the file has been created.
          To continue your work, please log out of the MSP Console, wait for the appliance
          to restart, and then log back in. The amount of time you'll have to wait for the
          MSP Appliance to come back online depends on the amount of information you have
          stored in the MSP Database.</p>
     <p>The full pathname for the backup file is: <%=completePath %></p>
<%     }
     else if ("restore".equals(action))
%>
     <p>The MSP Appliance has been shut down in order to restore from the <%=backupTarFile%> backup file,
          and will automatically restart as soon as the restore is complete.
          To continue your work, please log out of the MSP Console, wait for the appliance
          to restart, and then log back in. The amount of time you'll have to wait for the
          MSP Appliance to come back online depends on the amount of information you have
          stored in the MSP Database.</p>
<%     } else if ("backuperror".equals(action)) { %>
          <p><img src="images/dialogue/error_16.gif" class="icon" alt="Notify" /> Errors occurred while taking back up of MSP. Please see the backup service log file for more details.
          </P>
<%     } else if ("error".equals(action)) {
          if (tarFileStatus == 4) { %>
               <p><img src="images/dialogue/error_16.gif" class="icon" alt="Notify" /> The backup file <%=backupTarFile%> contains errors. This backup can't be restored. Please restore a valid back up.
               </P>
          <%} else if (tarFileStatus == 3) { %>
               <p><img src="images/dialogue/error_16.gif" class="icon" alt="Notify" /> The backup file list <%=backupFileList %> is missing. This file is required to restoring backup. Please get the backup file list and proceed with restoring backup.</p>
          <%} else if (tarFileStatus == 2) { %>
               <p> <img src="images/dialogue/error_16.gif" class="icon" alt="Notify" /> The backup file <%=backupTarFile%> contains errors and the backup file list <%=backupFileList%> is missing. This backup can't be restored. </p>
          <%} %>
<%     }
} else { %>
<p><strong>Note</strong>: Both backup and restore will shut down MSP temporarily. MSP will be unable to collect data from devices, send notifications, or provide MSP Console access during this time. When the backup or restore operation is complete, MSP will come back online automatically.</p>
<h3>Backup</h3>
<form action="<%= restoreURL.toString() %>" method="post">
<p>Please provide a name for your backup. MSP will provide the date automatically in the list of backups.</p>
<p><label for="<uif:namespace />backupName">Name</label> <input type="text" name="<uif:namespace />backupName" id="<uif:namespace />backupName" size="20" maxlength="256" /> <input type="submit" name="<uif:namespace />submitButton" value="Back up now" onclick="return <uif:namespace/>validateName()"/></p>
</form>
<h3>Restore</h3>
<p>This will restore all databases (device assets, collected device data, software packages, policies, etc.) to their state as of the time the backup was made. Changes since then <em>except for backups</em> will be destroyed.</p>
<%
Vector restoreList = helper.getRestoreEntries();
Vector restoreDates = helper.getRestoreDates();
Vector restoreVersions = helper.getRestoreVersions();
Vector filesStatus = helper.getBackupFilesStatus();
%>
<% if (restoreList.size() == 0) { %>
<p>There are no backups currently available.</p>
<% } else { %>
<form action="<%= restoreURL.toString() %>" method="post">
<table class="input-radios" id="<uif:namespace />existingBackups">
<thead>
<tr>
<th></th>
<th>Name</th>
<th>Date</th>
<th>MSP Version</th>
<th>Remarks </th>
</tr>
</thead>
<tfoot>
<tr>
<td colspan="4" class="actionsOnSelected">
<input type="submit" name="<uif:namespace />submitButton" value="Restore" onclick="return confirm('This action requires MSP and all related services to be shut down. Console will be unavailable if the request is submitted. The server will restart automatically once restore has been completed.');" />
<input type="submit" name="<uif:namespace />submitButton" value="Remove" onclick="return confirm('This action will remove the backup archive. You will no longer be able to restore this backup. Continue?');" />
</td>
</tr>
</tfoot>
<tbody><%-- First one (most recent) is checked by default. Every other row has class="portlet-section-alternate". Note that each ID must be unique and must match the value of the "for" attribute on the corresponding "label" element. --%>
<%
for (int i = 0; i < restoreList.size(); i++) {
%>
<tr <%= (i % 2 == 1) ? " class=\"portlet-section-alternate\"" : "" %>>
<td><input type="radio" name="<uif:namespace />selectedBackup" value="<%= i %>" id="<uif:namespace />selectedBackup-<%= i %>" <%= (i == 0) ? "checked=\"checked\"" : "" %> /></td>
<td><label for="<uif:namespace />selectedBackup-<%= i %>"><%= restoreList.elementAt(i) %></label></td>
<td><%= dateFormat.format((Date)restoreDates.elementAt(i)) %></td>
<td><%= restoreVersions.elementAt(i) %></td>
<td><%= filesStatus.elementAt(i) %></td>
</tr>
<%
%>
</tbody>
</table>
</form>
<% } %>
<% } %>
<script type="text/javascript">
<![CDATA[//><!]]>
</script>
and my BackupManager.java is as follows where the code in bold and italic is called the restore()
//============================================================================
// Symbol Technologies P R O P R I E T A R Y S O U R C E C O D E
// C O N F I D E N T I A L
// Copyright (c) 2003 Symbol Technologies. All Rights Reserved.
// All information contained herein is the property of Symbol Technologies,
// or its Licensors, and are protected copyrights and trade secrets, and may
// be covered by U.S. patents. Any reproduction or dissemination of any
// portion of this document, of the software, or other works derived from it
// is strictly forbidden unless prior written permission is obtained from
// Symbol Technologies.
//============================================================================
package com.symbol.mss.sdf.services.backup;
import java.io.*;
import java.sql.Time;
import java.text.DateFormat;
import java.util.logging.FileHandler;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
import java.lang.Process;
import java.util.*;
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.logger.LogEnabled;
import org.apache.avalon.framework.logger.Logger;
import com.symbol.mss.sdf.admin.AdministratorService;
import com.symbol.mss.sdf.backup.*;
import com.symbol.mss.sdf.data.*;
* @author nramaiah
* Service to perform scheduled backups of the system state.
public class BackupManager implements BackupService, DataHandler,
LogEnabled, Configurable {
// MSS Home Path
private static String mssHome = System.getProperty("phoenix.home", File.separator + "usr" +
File.separator + "local" +
File.separator + "mss" +
File.separator);
// Backup related definitions
private static final String BACKUP_LIST_FILE_NAME = "conf" + File.separator + "files_to_backup.txt";
private static final String BACKED_UP_LIST_FILE_NAME_SUFFIX = "_filesList.txt";
private static final String BACKUP_LOCATION = File.separator + "var" + File.separator + "lib" +
File.separator + "mss-backups" + File.separator;
private static final String BACKUP_PARTITION = File.separator + "var" + File.separator + "lib";
private static final String VERIFY_BACKUP = File.separator + "usr" + File.separator + "local" +
                                                       File.separator + "mss" + File.separator+"tools"+
                                                       File.separator+"backup"+File.separator+"verifyBackup.sh";
// DB backup/restore related definitions
private static final String DB_DUMP_LOCATION = File.separator + "var" + File.separator +
"lib" + File.separator +
"mysql-dumps" + File.separator;
private static final String DB_BACKUP_SCRIPT = "bin" + File.separator + "mysql_alldb_backup.sh";
private static final String DB_RESTORE_SCRIPT = "bin" + File.separator + "mysql_alldb_restore.sh";
// Private variables
private AdministratorService m_admin = null;
private Logger m_logger = null;
private String backupLocation = null;
private String backupListFileName = null;
private String backupPartition = null;
private int backupPartitionLimit = 90;
private String dbDumpLocation = null;
private String dbBackupScript = null;
private String dbRestoreScript = null;
private List servicesBackupList = null;
private String tarFileExtension =".tgz";
private String errFileExtension =".err";
private int exitValue=0;
* Default Constructor
public BackupManager() {
servicesBackupList = new ArrayList();
* Set the administrator service implementation. Link established by Broker service.
* @param admin reference to an implementation of AdministratorService
public void setAdministrator(AdministratorService admin) {
m_admin = admin;
* Set the job publisher service implementation. Link established by Broker service.
* @param jobPublisher reference to an implementation of JobPublisherService
public void setJobPublisher(DataChannel jobPublisher) {
jobPublisher.subscribe(this);
* Gets the backup manager object.
* @return backup manager object
public BackupService getBackupService() {
return this;
* Service lifecycle method.
* @param logger logger object to be used by the service
public void enableLogging(Logger logger) {
m_logger = logger;
* Service lifecycle method.
* @param configuration service configuration object
public void configure(Configuration configuration) throws ConfigurationException {
// Verify MSS Home path
if (!mssHome.endsWith(File.separator))
mssHome += File.separator;
// Get the location where the backup file needs to be placed
backupLocation = configuration.getChild("BackupLocation").getValue(BACKUP_LOCATION);
// Verify backup directory path
if (!backupLocation.startsWith(File.separator))
backupLocation = mssHome + backupLocation;
if (!backupLocation.endsWith(File.separator))
backupLocation += File.separator;
// Get the file listing the files/directories to be backed up
backupListFileName = configuration.getChild("FilesList").getValue(BACKUP_LIST_FILE_NAME);
// Verify backup list file name path
if (!backupListFileName.startsWith(File.separator))
backupListFileName = mssHome + backupListFileName;
// Get the partition where the backups are kept
backupPartition = configuration.getChild("BackupPartition").getValue(BACKUP_PARTITION);
// Verify backup partition path
if (!backupPartition.startsWith(File.separator))
backupPartition = File.separator + backupPartition;
if (backupPartition.endsWith(File.separator))
backupPartition = backupPartition.substring(0, (backupPartition.length()-1));
// Get the limit on the amount of free space on the backup partition
backupPartitionLimit = configuration.getChild("BackupPartitionLimit").getValueAsInteger(backupPartitionLimit);
// Get the location where the DB dump files will be placed
dbDumpLocation = configuration.getChild("DBDumpLocation").getValue(DB_DUMP_LOCATION);
// Verify DB dump directory path
if (!dbDumpLocation.startsWith(File.separator))
dbDumpLocation = mssHome + dbDumpLocation;
if (!dbDumpLocation.endsWith(File.separator))
dbDumpLocation += File.separator;
// Get the name of DB dump backup script
dbBackupScript = configuration.getChild("DBBackupScript").getValue(DB_BACKUP_SCRIPT);
// Verify backup script path
if (!dbBackupScript.startsWith(File.separator))
dbBackupScript = mssHome + dbBackupScript;
// Get the name of DB dump restore script
dbRestoreScript = configuration.getChild("DBRestoreScript").getValue(DB_RESTORE_SCRIPT);
// Verify restore script path
if (!dbRestoreScript.startsWith(File.separator))
dbRestoreScript = mssHome + dbRestoreScript;
* Individual services can supply a list of files/directories to be backed up.
* These are files apart from the files specified in conf/files_to_backup.txt and
* will be backed up as well.
* @param files list of files/directories
public void filesToBackup(List files) {
synchronized(this) {
if (files != null) {
if (files.size() > 0) {
// Add the list contents to the current backup list
for (int i=0; i<files.size(); i++) {
String tStr = (String)files.get(i);
// Check for absolute or relative path
if (tStr.startsWith(File.separator))
servicesBackupList.add(tStr);
else
servicesBackupList.add(mssHome + tStr);
else
m_logger.info("Empty list of filenames. Nothing added.");
else
m_logger.info("Null list of filenames. Nothing added.");
* Individual services can supply a list of files/directories to be backed up.
* Specified files will be added to the file defining the list of files to be backed up.
* @param files list of files/directories
private void persistFilesToBackup(List files) {
synchronized(this) {
if (files != null) {
if (files.size() > 0) {
// Add the list of files provided to the end of file
try {
File file = new File(backupListFileName);
if ((file == null) || (!file.exists()))
file.createNewFile();
// Seek to the end of the file
RandomAccessFile rFile = new RandomAccessFile(file, "rw");
if (rFile != null) {
rFile.seek(rFile.length());
// Write the list contents to the file
for (int i=0; i<files.size(); i++) {
String tStr = (String)files.get(i);
// Check for absolute or relative path
if (tStr.startsWith(File.separator))
rFile.writeBytes(tStr + "\n");
else
rFile.writeBytes(mssHome + tStr + "\n");
else
m_logger.error("Error opening file " + backupListFileName);
rFile.close();
catch (Exception ex) {
ex.printStackTrace();
m_logger.error("Error adding entries to file " + backupListFileName, ex);
else
m_logger.info("Empty list of filenames. Nothing added.");
else
m_logger.info("Null list of filenames. Nothing added.");
* Command to be run during the backup process. Individual services can
* provide shell commands that will be executed before backing up the files.
* @param command shell command to be executed
private void runCommand(String command) {
* Creates a shell script at the specified location that will backup the
* files listed in the List passed in.
* @param scriptFileName location where the script needs to be created
* @param backupFileName name for the tar file being created
* @param backupList list of files to be backed up
private void createBackupScript(String scriptFileName, String backupFileName, ArrayList backupList) throws Exception {
// Create a new StringBuffer to build the contents to be written to the script file
StringBuffer buffer = new StringBuffer();
// Add the initial comment in the start script
buffer.append("#!/bin/sh\n" + "set -x\n\n");
// Check if the partition has enough space
buffer.append("### Check if the partition has enough space\n" +
// "diskUsed=`df -k | grep \"" + backupPartition + "\" | awk '{print $5}' | cut -d\"%\" -f1`\n" +
               " diskUsed=`df -k \"" + backupPartition + "\" | awk '{print $5}' | cut -d\"%\" -f1 | grep -v Use`\n" +
"echo \"Partition " + backupPartition + " is $diskUsed% used.\"\n" +
"if [ \"$diskUsed\" -lt \"" + backupPartitionLimit + "\" ]\nthen\n" +
" echo \"Starting backup...\"\n\n");
// Shutdown semmd
buffer.append(" ### Shutdown semm\n" + " /etc/init.d/semm stop\n" +
" sleep 2\n\n");
// MSP Limited release and earlier builds stop mysql DB and backup the
// /var/lib/mysql directory as it is. Starting MSP 1.0 GA release, mysql
// dump script will be integrated which will create sql scripts to
// restore the database.
// Check if mysql dump creation script exists
File mysqlDumpScript = new File(dbBackupScript);
if (mysqlDumpScript.exists()) {
// MSP 1.0 GA and later releases
// Run the script that will generate sql scripts that would re-create the DB as it is
buffer.append(" ### Call mysql dump script\n" +
" " + dbBackupScript + "\n\n");
else {
// MSP Limited release
// Add command to shutdown mysql
buffer.append(" ### Shutdown mysql\n" + " /etc/init.d/mysql stop\n\n");
// Change to root directory and create the tgz file
buffer.append(" ### Create tgz file\n" + " cd /\n");
// Build up the tar file name from the current date and time
String fileName = null;
if ((backupFileName != null) && (backupFileName.length() > 0))
fileName = backupFileName;
else {
// File name not provided by user, build one using the timestamp
Calendar cal = Calendar.getInstance();
Date date = cal.getTime();
fileName = "MSS-"
+ DateFormat.getDateInstance().format(date).replaceAll(" ", "").replaceAll(",", "")+ "-"
+ (new Time(cal.getTimeInMillis())).toString().replaceAll(":", "").substring(0,4);
String tarFileName = fileName + ".tgz";
// Get the current MSP Version
String mspVersion = getMSPVersion();
// Gather all the files to be backed up. Add them to the tar command and
// also dump them into the file maintaining the list of files being backed up
String listStr = "";
for (int i=0; i<backupList.size(); i++)
listStr += (String)backupList.get(i) + "\n";
// Dump the current MSP version and the list of files being backed up into a manifest file
String listFileName = fileName + BACKED_UP_LIST_FILE_NAME_SUFFIX;
RandomAccessFile file = new RandomAccessFile(backupLocation + listFileName, "rw");
m_logger.info("List of files/directories being backed up:\n" + listStr);
file.writeBytes("### MSP Version: " + mspVersion + " ###\n");
file.writeBytes(listStr);
file.close();
// Add the tar command to the script
buffer.append(" echo \"Creating " + backupLocation + tarFileName + "...\"\n" +
" tar cvhfz " + backupLocation + tarFileName + " `grep -v \"MSP Version:\" " +
backupLocation + listFileName + "`\n\n");
// Check if free space on the backup partition has reduced below the limit
// If enough space left, backup is retained, "mss" is made the owner of the files,
// "backup" is made the group the files belong to,
// permissions changed to be "0660" and
// backup action declared a success
// Else, backup files are deleted and declared a failure
buffer.append(" ### Check if the partition has enough space left\n" +
//" diskLeft=`df -k | grep \"" + backupPartition + "\" | awk '{print $5}' | cut -d\"%\" -f1`\n" +
" diskLeft=`df -k \"" + backupPartition + "\" | awk '{print $5}' | cut -d\"%\" -f1 | grep -v Use`\n" +
" echo \"Partition " + backupPartition + " is $diskLeft% used.\"\n" +
" if [ \"$diskLeft\" -gt \"" + backupPartitionLimit + "\" ]\n" +
" then\n" +
" ### Failure\n" +
" echo \"Partition " + backupPartition + " does not have enough space.\"\n" +
" echo \"Backup " + backupLocation + tarFileName + " will be removed.\"\n" +
" rm -f " + backupLocation + fileName + "*\n" +
" echo \"Backup Failed.\"\n" +
" else\n" +
                    " tar tvzf " + backupLocation + tarFileName + " > /dev/null 2>&1\n" +
" if [ ! -s " + backupLocation + tarFileName + " -o $? -ne 0 ] \n" +
                    " then\n" +
                    " echo \"MSP Backup operation is not successful. The tar file " + backupLocation + tarFileName + " contains errors.\"\n" +
                    " echo \"Please take the backup again\"\n" +
                    "     touch "+backupLocation+fileName+".err\n" +
" else \n" +
" ### Success\n" +
" ### Change the owner, group and permissions for the backup files\n" +
" chown mss " + backupLocation + fileName + "*\n" +
" chgrp backup " + backupLocation + fileName + "*\n" +
" chmod 0660 " + backupLocation + fileName + "*\n" +
" echo \"Backup Completed.\"\n" +
" fi\n" +
" fi\n\n");
// MSP Limited release and earlier builds re-start mysql. Starting
// MSP 1.0 GA release, mysql is not stopped and so re-start is not
// needed. sql scripts created by the dump script get packed into
// the tar file and so are deleted.
// Check if mysql dump creation script exists
if (mysqlDumpScript.exists()) {
// MSP 1.0 GA and later releases
// Remove DB dump files
buffer.append(" ### Remove DB Dump Files\n" + " rm -f " + dbDumpLocation + "*\n\n");
else {
// MSP Limited release
// Start mysql
buffer.append(" ### Start mysql\n" + " /etc/init

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