rabbitmessaging

Node promise library to handle complex RabbitMQ actions.

Overview:

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Microservices are small programs to handle single task form a complete process chain. The right pattern of communication between microservices is the key to scale your application and solve most of the distributed system problems. RabbitMQ provide a event driven approach to send messages to each other in a Microservice architecture.

For More info of RabbitMQ see:

https://www.rabbitmq.com/ http://howtocookmicroservices.com/communication/ http://blog.runnable.com/post/150022242931/event-driven-microservices-using-rabbitmq

This library provide a simple wrapper on amqp to interact with Rabbit using following approach:

• Broker
• Publisher
• Subscriber

Features:

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• Automatically try to reconnect 60 times (configurable) at 1 second apart if broker dies
• Round-robin connection between multiple brokers in a cluster
• Handles messages in memory
• TLS encryption support
• Provide option to rpc, send, listen, subscribe and publish

__connection:

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Create a new amqp connection which will connect to provided url in following structure:

	url: 'amqp://' + rabbitmq.username + ':' + rabbitmq.password + '@' + rabbitmq.host + ':' + rabbitmq.port

Options:

• url - URL to the server Default: false
• prefetch - Number of channels allowed in a single connection Default: 10
• heartbeat - number of sec after which server send back a connection alive heartbeat else throws an error Default: 10
• reconnectTimeout - Timeout before trying to reconnect to the server Default: 10000
• debug - debug the output Default: false
• conn - Connection object Default: false
• maxRetry - number times the rabbit connection retry after failure. that calculate to 10 mins of retry before service fails Default: 60
• xMessageTtl - Time to live for a return queue Default: 60000
• xExpires - Expiry time for for a queue Default: 60000
• XMaxPriority - Priority for this queue Default: 10
• noAck - if true, the broker won't expect an acknowledgement of messages delivered to this consumer Default: false
• ch - channel Default: false
• caOptions - socket Options for TLS encryption. default: undefined
  • cert - client cert
  • key - client key
  • passphrase - passphrase for key
  • ca - array of trusted CA certs
  • clientProperties - user defined properties { IP: 127.0.0.1 }

Examples: see GITHUB