Bot

Simple application according to requirements of potential employer.

Prerequisites

• Java Development Kit (at least 7, tested only for 8)
• Apache Maven
• RabbitMQ message broker

Rabbit MQ

Its distribution can be downloaded from the official web site www.rabbitmq.com

For installation on Debian derived Linux systems use

apt-get install rabbitmq-server

Build

Building of application is usual for all maven projects. In the top directory of distribution execute the command:

mvn clean package

The resulting package could be found in target directory in two versions. With and without dependencies.

• bot-0.1-SNAPSHOT-jar-with-dependencies.jar
• bot-0.1-SNAPSHOT.jar

Main commands

To run the application use command

java -jar <pathToJarFile> <command name> <arguments>

At the time of program execution RabbitMQ broker should be launched on the same system with default credentials.

Available commands:

• schedule - Add filenames to resize queue
• resize - Resize next images from the queue
• status - Output current status in format <number_of_images>
• upload - Upload next images to remote storage

Config file

Configuration file is situated in directory of launch with name config.json. It should contain name of temporary directory, name of Amazon S3 bucket and its credentials. List of parameters is below:

• aws_access_key - credentials of S3
• aws_secret_access_key - credentials of S3
• bucketName - name of S3 bucket
• tmpDirectoryName - directory for resized pictures storing
• queue_host - name of RabbitMQ host (should be localhost)