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Remove the payload and send POST request to backend via wso2 esb

There are situations where back-end does not need a payload for POST request. However in wso2 ESB has the payload that mediate before the back-end call. In order to drop the message payload you need to perform two tasks in the wso2 ESB.

• Create empty payload using Payload mediator
• use the FORCE_POST_PUT_NOBODY property to enforce.

Example is given below that demonstrate the use case. 

Bind WSO2 Mamanement Console to a certain IP Adress

There are lot of Security measures when deploy the WSO2 Server products. One of them is to restrict the accessibility of the server for certain IP addresses.

In WSO2 serves, it is possible to restrict via the the tomcat valve.

Edit
/repository/conf/tomcat/context.xml 


Add
<Valve className="org.apache.catalina.valves.RemoteAddrValve" allow="127\.0\.0\.1"/ >

How to delete the element in the array of json object in Java-script

Recently we had a very basic requirement to delete an key value pare in the json array using Javascript.


Input data

{"invideoPromotion":{"items":[{"id":{"type":"video","videoId":"11","websiteUrl":""},"timing":{"type":"ms","offsetMs":"2222"},"customMessage":"aa","promotedByContentOwner":"vanji"}]}}

Expected business logic

When type of id is video and websiteUrl is null; websiteUrl should be removed from the payload.

Output data

{"items":[{"id":{"type":"video","videoId":"11"},"timing":{"type":"ms","offsetMs":"2222"},"customMessage":"aa","promotedByContentOwner":"vanji"}]}}

In-order to do this you can use delete functionality of the json in javascript.

Example code

How to get the tables list in ms sql server that has the data

This query will help to see the data size details in tables of the MS SQL database.

SELECT 
    t.NAME AS TableName,
    s.Name AS SchemaName,
    p.rows AS RowCounts,
    SUM(a.total_pages) * 8 AS TotalSpaceKB, 
    SUM(a.used_pages) * 8 AS UsedSpaceKB, 
    (SUM(a.total_pages) - SUM(a.used_pages)) * 8 AS UnusedSpaceKB
FROM 
    sys.tables t
INNER JOIN      
    sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN 
    sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN 
    sys.allocation_units a ON p.partition_id = a.container_id
LEFT OUTER JOIN 
    sys.schemas s ON t.schema_id = s.schema_id
WHERE 
    t.NAME NOT LIKE 'dt%' 
    AND t.is_ms_shipped = 0
    AND i.OBJECT_ID > 255 
GROUP BY 
    t.Name, s.Name, p.Rows
ORDER BY 
    t.Name

Retrieving source IP detail in WSO2 ESB and APIM

These properties will retrieve the respective source IP into the properties.

Remote host 

   <property name="client-host" expression="get-property('axis2', 'REMOTE_HOST')" />

Remote address 

   <property name="client-address" expression="get-property('axis2', 'REMOTE_ADDR')" />

X-Forwarded-For

   <property name="xforward-header" expression="$trp:X-Forwarded-For""/> />

Connecting and monotoring JMX of WSO2 products in EC2 instance

Most of the time current deployments are hosted in EC2 instance as it is very reliable and scalable. When it come to monitoring the WSO2 products via jmx in EC2 instances. You have to add some parameters inorder to connect with it.


add below parameters in /bin/wso2server.sh

    -Dcom.sun.management.jmxremote \

    -Dcom.sun.management.jmxremote.port=XXXX \

    -Dcom.sun.management.jmxremote.ssl=false \

    -Dcom.sun.management.jmxremote.authenticate=false \

    -Djava.rmi.server.hostname=XXX.XXX.XXX.XXX \

Here port should be port that not used any where in the given instance and host-name should be private IP of the EC2 instances.

Access and monitor the server via Jconsole by JMX url connection that has the domain name and the jmx ports define in the carbon.xml