MongoDB and Ruby

ctop – manage and monitor your Docker containers

In this post, I’d like to introduce you to a nice command line tool called ctop. I discovered it when I was looking for a tool to monitor some Docker containers for a MongoDB replica set on my local machine while running some load tests. ctop is basically...

• Container

17.12.2018 | 1 minutes reading time

Google Cloud Function for Machine Learning

In this post I’ll show you how to use a Google Cloud Function to access the machine learning API for natural language processing . Cloud functions are one of the serverless features of the GCP. Please keep in mind that serverless does not mean that your...

• Cloud
• Google Cloud
• Machine Learning

21.5.2018 | 5 minutes reading time

Google Cloud Natural Language API

In this article I’d like to give you a short introduction to a subset of Google’s machine learning capabilities: the natural language API. This API processes text snippets and can apply several analysis algorithms: analyze-entities: detects entities ...

• Cloud
• Google Cloud
• Machine Learning

6.5.2018 | 4 minutes reading time

RESTful Microservices on the Google Cloud Platform

This tutorial shows you how to develop a RESTful microservice running on the Google Cloud Platform. I already explained how to deploy Spring Boot applications to the AppEngine and how to set up a MongoDB replica set in the Compute Engine . Today you...

• Cloud
• Google Cloud
• Microservices
• API
• Spring

8.4.2018 | 3 minutes reading time

Cloud Launcher for MongoDB in the Google Compute Engine

In this post you will learn how to use Google’s Cloud Launcher to set up instances for a MongoDB replica set in the Google Compute Engine. Replication in MongoDB A minimal MongoDB replica set consists of two data bearing nodes and one so-called arbiter...

• Cloud
• Infrastructure as Code
• Google
• NoSQL

5.3.2018 | 3 minutes reading time

Deploying Spring Boot Applications in the Google AppEngine Flex Environment

In this tutorial I will show how to set up a deployment of Spring Boot applications for the AppEngine Flex environment in the Google Cloud infrastructure. Prerequisites You should be familiar with the Spring Boot ecosystem and should be able to use Maven...

• Software development
• Cloud
• Google
• Google Cloud
• Spring

13.2.2018 | 2 minutes reading time

Change Streams in MongoDB 3.6

MongoDB 3.6 introduces an interesting API enhancement called change streams. With change streams you can watch for changes to certain collections by means of the driver API. This feature replaces all the custom oplog watcher implementations out there...

• Change Management
• NoSQL

15.1.2018 | 2 minutes reading time

Spring Cloud Service Discovery with Dynamic Metadata

Spring Cloud Service Discovery If you are running applications consisting of a lot of microservices depending on each other, you are probably using some kind of service registry. Spring Cloud offers a set of starters for interacting with the most common...

• Cloud
• Software architecture
• Spring

8.1.2018 | 2 minutes reading time

In love with Ada

Anyone out there remembering the Ada programming language? In this blog post, I’m going to give you a short introduction to Ada, the history of its name and some of the current occurrences in pop culture. Hello World in Ada To compile our first Ada program...

• Software development
• Raspberry Pi

10.4.2016 | 3 minutes reading time

Joins and Schema Validation in MongoDB 3.2

Version 3.2 of the NoSQL database MongoDB introduces two new interesting features (amongst others) that I’d like to explore in this blog post. Joins The logical namespaces where documents are stored are called collections in MongoDB. Up to now every...

• NoSQL
• Big Data
• Validation

7.12.2015 | 3 minutes reading time

MongoDB World 2014

For the very first time, the MongoDB community from all over the world gathered in one place. The MongoDB World conference 2014 took place in New York City from June 23rd to 25th. Talks The talks were separated into three topics: dev, ops & buisness...

• Big Data
• NoSQL
• Community

6.7.2014 | 2 minutes reading time

Test Automation for NoSQL Databases with NoSQL Unit and Travis-CI

Today I want to give you a short summary of my NoSQL matters talk on test automation for NoSQL databases . I basically introduce two tools that may help you with writing unit and integration tests for NoSQL databases: NoSQLUNit is a JUnit extension...

• NoSQL
• Testing
• CI/CD

7.5.2014 | 1 minutes reading time

Near-Realtime Analytics with MongoDB, Node.js & SmoothieCharts

In this blog post we’ll have a look at how easy it is to do some (near-)realtime analytics with your (big) data. I will use some well-known technologies like MongoDB and node.js and a lesser known JavaScript library called Smoothies Charts for realtime...

• Big Data
• Node.js

21.1.2014 | 4 minutes reading time

MongoDB 2.4 Introduces Geospatial Indexing and Search for GeoJSON Geometries...

In case you are unfamiliar with the geospatial stuff, have a look at this introduction to geospatial indexing and searching with MongoDB . In version 2.4 MongoDB introduces support for a subset of GeoJSON geometries. These geometries can be used both...

• JavaScript
• Big Data
• NoSQL

6.3.2013 | 3 minutes reading time

MongoDB Text Search Tutorial

In my introduction to text search in MongoDB , we had a look at the basic features. Today we’ll have a closer look at the details. API You may have noticed that a text search is not executed with a find() command. Instead you call db.foo.runCommand( ...

• NoSQL
• Search

10.1.2013 | 7 minutes reading time

MongoDB Text Search Explained

The upcoming release 2.4 of MongoDB will include a first, experimental support for full text search (FTS). This feature was requested early in the history of MongoDB as you can see from this JIRA ticket: SERVER-380 . FTS is first available with the ...

• NoSQL
• Search
• NLP

7.1.2013 | 5 minutes reading time

Spring Batch and MongoDB

#springbatch #mongodb #nosql Spring Batch Spring Batch is a Spring-based framework for enterprise Java batch processing. An important aspect of Spring Batch is the separation between reading from and writing to resources and the processing of a single...

30.11.2012 | 5 minutes reading time

Oliver Gierke on Spring Data and all the REST …

Today something completely different: I’ll interview Oliver Gierke from SpringSource . He we go … Tobias Trelle: Hi Oliver. Would you mind introducing yourself to listeners that might not already know you. Oliver Gierke: My name is Oliver Gierke. I ...

• Data
• Java
• Community
• Database
• NoSQL
• Spring

20.11.2012 | 10 minutes reading time

Pessimistic Locking with MongoDB

In this article, I’m going to sketch a pattern for implementing pessimistic locking with MongoDB . MongoDB is a document-orientated NoSQL datastore that does not support locking itself. In some business processes it may be required that you have an ...

23.10.2012 | 3 minutes reading time

GridFS Support in Spring Data MongoDB

MongoDB MongoDB is a highly scalable, document oriented NoSQL datastore from 10gen. For more information have a look at the MongoDB homepage: http://www.mongodb.org . A short introduction to MongoDB can be found at this blog post . GridFS In MongoDB ...

• Cloud
• Java
• Infrastructure
• NoSQL
• Spring

26.7.2012 | 2 minutes reading time

MonjaDB – A MongoDB GUI Client Tool

MongoDB MongoDB is a highly scalable, document oriented NoSQL datastore from 10gen. For more information have a look at the MongoDB homepage: http://www.mongodb.org . A short introduction to MongoDB can be found at this blog post . MonjaDB MonjaDB is...

5.6.2012 | 1 minutes reading time

Spring Data – Part 6: Redis

Redis Redis [1] is a NoSQL [2] key/value datastore. Think of it as a big, very fast persistent hashmap. Redis offers a master/slave data replication [3] and also a built-in publish/subscribe messaging system [4]. It is implemented in C and can be built...

• Java
• Cloud
• NoSQL
• Spring

26.4.2012 | 4 minutes reading time

Spring Data – Part 4: Geospatial Queries with MongoDB

Introduction Every location-based service [1 ] has to solve the following problem: find all venues within a given distance from the current location of the user. Long before the advent of mobile devices, geographic information systems (GIS) [2 ] had ...

• Cloud
• NoSQL
• Spring

15.3.2012 | 6 minutes reading time

Spring Data – Part 5: Neo4j

Introduction Neo4j [1 ] is a high-performance NoSQL [2 ] datastore specialized in persisting graphs. A graph [3 ] is data structure consisting of finite sets of vertices and edges, where an edge is a connection between two vertices. Graphs are used to...

• Software architecture
• Java
• Cloud
• NoSQL
• Spring

27.2.2012 | 4 minutes reading time

Spring Data – Part 3: MongoDB

In this part of my blog series I’m going to show how easy it is to access a MongoDB datastore with Spring Data MongoDB. MongoDB MongoDB is a so called NoSQL datastore for document-oriented storage. A good place to start with MongoDB is the Developer...

• Cloud
• NoSQL
• Spring

1.2.2012 | 5 minutes reading time

Spring Data – Part 2: JPA

What happened before? Part 1: Spring Data Commons Part 2: Spring Data JPA After looking at the Spring Data Commons project in the first part of this blog series, today I’m going to introduce you to the sub project Spring Data JPA . JPA Being a part ...

• Java
• Software development
• Spring

21.1.2012 | 3 minutes reading time

Spring Data – Part 1: Commons

One goal of the Spring Data project is to provide a common API for accessing both NoSQL datastores and relational databases. Spring Data serves as an umbrella project which offers general solutions – like pagination in large result sets – and consists...

• Spring

21.12.2011 | 2 minutes reading time

Testing and Mocking of Static Methods in Java

Again and again I stumble upon the myth that static code is evil because it is hard to test and you can’t mock it. Architects and lead developers are telling that tale and the juniors are picking it up and repeating it: “Static code is evil. It is hard...

• BDD
• Java
• Testing
• Software development
• Test Driven Development

10.11.2011 | 4 minutes reading time

Cloud Computing Basics: the CAP Theorem

Almost unlimited scalability is an essential facet of cloud computing as it is offered by the Google App Engine or CloudFoundry. Insuring this feature leads to a trade-off with other nonfunctional aspects from enterprise computing like consistency. But...

• Database
• Cloud

28.8.2011 | 4 minutes reading time

Documenting Custom Robot Framework Keyword Libraries

Right now, I’m introducing the robot framework for automated web tests for one of our customers. Beside the basic robot framework, we are using the SeleniumLibrary and RIDE . This tool stack is going to be rolled out to all software development teams...

• Testing

14.8.2011 | 2 minutes reading time

Quo vadis VMware? vFabric vs. Cloud Foundry

Introduction We will start with an introdcution of VMware’s cloud solutions vFabric and Cloud Foundry. After that, the further evolution of these PaaS platforms will be discussed. vFabric VMware offers his PaaS cloud solution vFabric Cloud Application...

• Spring
• Cloud

6.6.2011 | 3 minutes reading time

WebSphereMQ Integration using Mule ESB Community Edition

Mule ESB is an open source implementation of an enterprise service bus. In contrast to the free Community Edition, Mule’s commercial Enterprise Edition provides integration of WebSphereMQ servers out of the box. This article explains how to integrate...

• Software architecture
• Integration

11.3.2011 | 1 minutes reading time