Category Archives: Emerging Technologies

Logback is not writing specific log file Solution

Logback is not writing specific log file Solution Logback Configuration: <property name=”DEV_HOME” value=”/root/apps/logs” /> <appender name=”FILE-AUDIT” class=”ch.qos.logback.core.rolling.RollingFileAppender”> <file>${DEV_HOME}/myapp.log</file> <rollingPolicy class=”ch.qos.logback.core.rolling.TimeBasedRollingPolicy”> <!– rollover daily –> <fileNamePattern>${DEV_HOME}/archived/myapp.%d{yyyy-MM-dd}.%i.log.gz</fileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class=”ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP”> <!– or whenever the file size reaches the max –> <maxFileSize>${rolling.file.max.size}</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> <maxHistory>${rolling.file.max.history}</maxHistory> </rollingPolicy> <encoder> <pattern>${rolling.file.encoder.pattern}</pattern> </encoder> </appender> Issue is related to conflict between log4j and Logback, whenContinue reading “Logback is not writing specific log file Solution”

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Crawl and Index….. Nutch / elasticSearch – Partners in the making

Hi In the internet era, there is an old tech saying – “Content is King”  (inspired by old Jungle saying from Phantom.. 🙂 ) One of the common challenges in content management system is to extract the latest information.  In the WWW world, it is commonly known as crawling.  The king of the crawler worldContinue reading “Crawl and Index….. Nutch / elasticSearch – Partners in the making”

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Apache Common Pool – Object pool example

Advantage of using object pool is to improve performance of the application by saving time to create new object from other source for the same purpose. Object pool creates once and reuse for other subsequent operations on the same object. You can customize other configuration settings. Please visit this URL for more info: http://commons.apache.org/proper/commons-pool/api-1.6/index.html Step:1 Add this MavenContinue reading “Apache Common Pool – Object pool example”

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Cassandra DataStax – Developer Guide with Spring Data Cassandra

We will discus Cassandra implementation : Important Points: http://www.datastax.com/documentation/cassandra/2.0/cassandra/gettingStartedCassandraIntro.html Recommended stable production version – DataStax Enterprise 4.5. (When this article as written) Compound Partition  and Clustered keys- http://www.datastax.com/documentation/cql/3.0/cql/ddl/ddl_compound_keys_c.html Spring-Data-Cassandra API and reference docs- http://projects.spring.io/spring-data-cassandra/  (Current release- 1.1.0.RELEASE) Download and Installation:   1. Tarball Installation DataStax DB You need to register yourself with DataStax for download. DataStax Enterprise – http://www.datastax.com/download#dl-enterprise.Continue reading “Cassandra DataStax – Developer Guide with Spring Data Cassandra”

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MongoDB + Java + Maven Sample Application

Prerequisite: Download and Install MongoDB (http://docs.mongodb.org/manual/installation/) on your local machine and run two instances in two separate terminal/command prompt. This sample app is developed on Mac OS/Linux env. 1. Start MongoDB server using : ./mongod 2. Start MongoDB client : ./mongo Add MongoDB Jar dependency in your project:   Sample MONGODB CRUD code:

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Designing Modern Enterprise Search Solution –Part 1

This article would be a two part series. Part 1 – 5 requirements that will force you to adopt an enterprise search engine. Part 2– Addressing Enterprise search requirements with open source search platforms.   Part 1 – 5 requirements that will force you to adopt an enterprise search engine. Search over diverse content sources- An enterpriseContinue reading “Designing Modern Enterprise Search Solution –Part 1”

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Git vs SVN – Advantages of GIT

Integration– Git has very flexible integration with Stash(GIt UI), Bamboo (Build tool) , JIRA (Agile). We can associate feature (a separate branch of code for a given story) branch with any JIRA story ( part of a sprint) by creating branch from Stash. So that all code changes/commits can be easily audit/trackable. Bamboo create buildContinue reading “Git vs SVN – Advantages of GIT”

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