WSO2 BAM 2.0.0-Alpha 2 released..!!!!

After working hard on releasing BAM-2.0.0 Alpha2, We were able to release it on 13th March 2012.

This is the release note :

WSO2 team is pleased to announce the release of version 2.0.0 - ALPHA 2 of WSO2 Business Activity Monitor.

WSO2 Business Activity Monitor (WSO2 BAM) is a comprehensive framework designed to solve the problems in the wide area of business activity monitoring. WSO2 BAM comprises of many modules to give the best of performance, scalability and customizability. These allow to achieve requirements of business users, dev ops, CxOs without spending countless months on customizing the solution without sacrificing performance or the ability to scale.

WSO2 BAM is powered by WSO2 Carbon, the SOA middleware component platform.

Downloads

The binary distribution can be downloaded at http://dist.wso2.org/products/bam/2.0.0-alpha2/wso2bam-2.0.0-ALPHA2.zip. 

The documentation pack is available at http://dist.wso2.org/products/bam/2.0.0-alpha2/wso2bam-2.0.0-ALPHA2-docs.zip.

Samples

1. Service Data Agent - Sample to install Service data agent, publish statistics and intercepted message activity from Service Hosting WSO2 Servers such as WSO2 AS, DSS, BPS, CEP, BRS and any other WSO2 Carbon server with the service hosting feature
2. Mediation Data Agent - Sample to install Mediation data agent, publish mediation statistics and intercepted message activity using Message Activity Mediators from the WSO2 ESB
3. Data center wide cluster monitoring - Sample to simulate two data centers each having two clusters sending statistics events, perform summarizations and visualize them in a dashboard
4. End - End Message Tracing - Sample to simulate messages fired from a set of servers to WSO2 BAM and set up message tracing analytics and visualizations of respective messages
5. KPI Definition - Sample to simulate receiving events from a server (ex: WSO2 AS), perform summarizations and visualize product and consumer data in a retail store
6. Fault Detection & Alerting - Sample to simulate receiving events from a server (ex: WSO2 ESB), detect faults and fire email alerts

Features

• Data Agents
1. Pre built data agents - Service Data Agent for the WSO2 AS, DSS, BPS, CEP, BRS and any other WSO2 Carbon server with the service hosting feature and Mediation Data Agent for the WSO2 ESB
2. A re-usable Agent API to publish events to the BAM server from any application (samples included)
3. Apache Thrift based Agents to publish data at extremely high throughput rates
4. Option to use Binary or HTTP protocols
• Event Storage
1. Apache Cassandra based scalable data architecture for high throughput of writes and reads
2. Carbon based security mechanism on top of Cassandra
• Analytics
1. An Analyzer Framework with the capability of writing and plugging in any custom analysis tasks
2. Built in Analyzers for common operations such as get, put aggregate, alert, fault detection, etc.
3. Scheduling capability of analysis tasks
• Visualization
1. Drag and drop gadget IDE to visualize analyzed data with zero code
2. Capability to plug in additional UI elements and Data sources to Gadget IDE
3. Google gadgets based dashboard

Reporting Issues

WSO2 encourages you to report issues, enhancements and feature requests for WSO2 BAM. Use the issue tracker for reporting any of these.

Setting up a Cassandra cluster using wso2 carbon

If you want to use WSO2 security model with Cassandra cluster here I'll show you, how you can setup a cassandra cluster using wso2 carbon.

First you need to download wso2 carbon (I am using version 3.2.2)

Then install cassandra feature by using the p2 repository from http://dist.wso2.org/p2/carbon/releases/3.2.2/ to wso2 carbon server.

This will install Cassandra 0.7 version to your carbon server.

Adding p2 repository (http://dist.wso2.org/p2/carbon/releases/3.2.2/)

Installing Cassandra 3.2.2 feature


After finishing the installation restart the carbon server. Now carbon server will work as your Cassandra server.

setup few more cassandra nodes using wso2 carbon as above according to your requirement.
You can follow the instruction given by this site for setting up the cassandra cluster.
The cassandra.yaml configuration file is located in $wso2carbon_home/repository/conf/advanced/ directory.


Add following configuration file (cassandra-auth.xml) $wso2carbon_home/repository/conf/advanced/ in order to view keyspaces using Cassandra Keyspaces ui (change the username and password accordingly).

<Cassandra>

   <EPR>https://localhost:9443/services/CassandraSharedKeyPublisher</EPR>

   <User>USERNAME</User>

   <Password>PASSWD</Password>

</Cassandra>

cassandra-auth.xml

Cassandra Keyspaces ui


Once you finish the configuration. You can check the status of the cluster by using Cassandra cluster ui or else You can use nodetool comes with Apache Cassandra to monitor the cluster.

Cassandra cluster monitor ui 

nodetool 

$./nodetool -h 192.168.0.100 -p 9999 ring -u admin -pw admin

Address         Status State   Load            Owns    Token                                    
                                                       113427455640312821154458202477256070485  
192.168.0.100   Up     Normal  20.36 MB        33.33%  0                                        
192.168.0.101   Up     Normal  251.64 MB       33.33% 56713727820156410577229101238628035242    
192.168.0.102   Up     Normal  20.95 MB        33.33%  113427455640312821154458202477256070485

note: remote jmx agent port number in carbon server is 9999 + offset (default offset in carbon.xml is 0)

Fixing ADB databinding issue when web service method returning OMElement

When I try to call a web service which return an OMElement, I faced above issue (My Axis2 version is 1.6.1). Following I have shown the steps that I did for fixing the issue.

This is the part of the stack trace.

org.apache.axis2.AxisFault: org.apache.axis2.databinding.ADBException: Any type  element type has not been given

    at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)

    at org.wso2.carbon.bam.presentation.stub.QueryServiceStub.fromOM(QueryServiceStub.java:8908)

    at org.wso2.carbon.bam.presentation.stub.QueryServiceStub.queryColumnFamily(QueryServiceStub.java:800)

    at org.wso2.carbon.bam.clustermonitor.ui.ClusterAdminClient.getClusterStatistics(ClusterAdminClient.java:148)

If you check the schema of the response element in your generated wsdl(by axis2) it should similar to this.

<xs:element name="queryColumnFamilyResponse">

      <xs:complexType>

         <xs:sequence>

                <xs:element minOccurs="0" name="return" nillable="true" type="xs:anyType" />

         </xs:sequence>

      </xs:complexType>

</xs:element>

In order to fix the ADB databinding issue you need to change the above schema as follows and regenerate the stub code.

<xs:element name="queryColumnFamilyResponse">

     <xs:complexType>

          <xs:sequence>

              <xs:any processContents="skip"/>

          </xs:sequence>

     </xs:complexType>

</xs:element>

Then ADB will generate code that represents the content of OriginalMessage as an OMElement and this will fix your problem.

WSO2Con 2011

"WSO2Con is one fantastic week of tutorials, tech talk and networking events. Whether you are a developer, architect, IT manager or technology enthusiast, learn how global enterprises, SaaS providers and innovative startups are using WSO2 platforms to build distributed web apps, java services, bpel flows, Software-as-a-Service (SaaS) and more"

This will be held on September 12-16 at Sri Lanka, You must join this event if you are interested in SOA and Cloud Computing. Not only that there are many other topics (NoSQL,Carbon platform,OSGI,Security,..etc) will be covered in conference and tutorial sessions. 

Also You can find more detail about WSO2 Business Activity Monitoring product, which is  developing with new architecture that can handle large volume of data, also it provides a powerful framework for customizing and monitoring key performance indicators.

Speaker panel consist of experienced speakers from more than 10 countries, including speakers from Google,IBM,..etc.

Complete Aggenda for Wso2 Con 2011 can be found from here.

You can get rough idea of the topics that is going to cover from following image.

How to close, open ports in linux

If you want to close the port 8080, this is an one way of doing this, if you are on ubuntu.

type following command:
> netstat -lpn

This will list all listening ports


Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:49027           0.0.0.0:*               LISTEN      13098/java    
tcp        0      0 127.0.0.1:9160          0.0.0.0:*               LISTEN      13098/java    
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      -            
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      13098/java    
tcp        0      0 0.0.0.0:33395           0.0.0.0:*               LISTEN      13098/java    
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -            
tcp        0      0 127.0.0.1:7000          0.0.0.0:*               LISTEN      13098/java  


Use grep for filtering out the 8080 port.

You can use following command:
> netstat -lpn | grep 8080

You'll get output something like this

tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      13098/java

Here my process id is 13098 and it is the process that is using port 8080

Kill the process using following command:
> sudo kill 13098

Now port 8080 is free.

How to re-index all resources in GREG 4.0.0

If you need to re-index all resources in greg 4.0.0, here I have explain how you can do that. 

This can be easily done by editing registry.xml located at CARBON_HOME/repository/conf folder. In registry.xml go to the indexingConfiguration section and then change the resource name of lastAccessTimeLocation to some other value.

Default value:

<lastAccessTimeLocation>/_system/local/repository/components/org.wso2.carbon.registry/indexing/lastaccesstime</lastAccessTimeLocation>

New Value (after changing the resource name):

<lastAccessTimeLocation>/_system/local/repository/components/org.wso2.carbon.registry/indexing/newlastaccesstime</lastAccessTimeLocation>

Now restart the server, then greg will re-index all resources from scratch.

Reinstall grub2 after installing windows 7 (XP/Vista)

You may need to reinstall grub when windows is installed after ubuntu (or if you reinstalled windows in dual boot (Windows and ubuntu) system). I used following steps for reinstalling grub in order to login to my Ubuntu 10.04 after reinstalling Windows 7 on my machine.

1. boot the ubuntu LiveCD

2. Open a terminal and type

sudo fdisk -l

This list the partition tables, and in my case root (/) partition is on /dev/sda9.

3. Mount that partition using following command.

sudo mount /dev/sda9 /mnt

4. Run the grub-install command as below. This will reinstall the grub 2

sudo grub-install --root-directory=/mnt /dev/sda

Here "sda" is the hard disk on which your Linux distribution is installed!

5. Reboot

6. Finally Refresh the grub 2 menu using following command

sudo update-grub

Now everything should be fine :)