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Access Tomcat Server URL from Smartphone/Mobile/Tablet

One Line Answer : Disable the System Firewall  I was developing a small web application in my Laptop using Spring MVC and was testing the application in Laptop browser. In one case, I wanted to see the web page in mobile and so I opened the URL in Android smartphone. But the page was not reachable due to the… Read More »

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Docker DataStax DSE Volume Mount Not Working – Solved

I was playing around with DataStax DSE Docker image using Docker Compose and noticed that the Docker volumes were not mounted. I was able to solve the issue by using named volume mounts (Docker Compose v3). Not Working Docker Compose YAML version: "2" services: dse01: volumes: - /mnt/dse/data/cassandra:/var/lib/cassandra - /mnt/dse/data/spark:/var/lib/spark Working Docker Compose YAML version: "3.2" services: dse01: volumes:… Read More »

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Custom Elasticsearch Index Name/Type Name based on Events in Logstash

     The article details on how to use custom Index/Type name when using Logstash for proessing logs and Elasticsearch as Output. input { file { } } filter { grok { pattern => "%{NUMBER:attribute1} %{GREEDYDATA:attribute2}" } ruby { code => ' event["custom_index_name"] = event["attribute1"] event["custom_type_name"] = event["attribute2"] ' #You can also set an field… Read More »

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cinemizer OLED – Virtual Reality headset from Carl Zeiss

            Everyone would be aware of Oculus Rift, next generation virtual reality headset. we have been for the consumer version of the product for  a very long time. If you want to get something similar to Oculus Rift, grab cinemizer OLED, 3D Virtual Reality video glasses from from Carl Zeiss… Read More »

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Linked List in C- Reversing a Linked List using Recursion

DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Try DATA STRUCTURES IN C – LINKED LIST (20 PROGRAMS) Linked List in C- Reversing a Linked List using Recursion : Input: Linked List: one->two->three->four head pointer points to first node “one” Output:  Linked List: four->three->two->one head pointer points to first node “four” Source Code : #include<stdio.h>… Read More »

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