More Related Content Similar to Rabbitmq Boot System Similar to Rabbitmq Boot System (20) More from Alvaro Videla (20) 2. About Me
• Developer Advocate for Cloud Foundry
• Blog: http://videlalvaro.github.com/
• Twitter: @old_sound
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3. About Me
Co-authored
RabbitMQ in Action
http://bit.ly/rabbitmq
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6. RabbitMQ Boot Steps
https://github.com/videlalvaro/rabbit-internals/blob/master/rabbit_boot_process.md
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7. RabbitMQ Boot Steps
Take care of starting the many sub
systems that compose RabbitMQ
respecting order and dependencies
Wednesday, December 12, 12
8. RabbitMQ Boot Steps
Take care of starting the many sub
systems that compose RabbitMQ
respecting order and dependencies
brainchild of @leastfixedpoint
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9. Subsystems
• external infrastructure
• kernel (rabbit kernel)
• core
• routing
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11. RabbitMQ Boot Steps
-rabbit_boot_step({recovery,
[{description,
"exchange, queue and binding
recovery"},
{mfa, {rabbit, recover, []}},
{requires, empty_db_check},
{enables, routing_ready}]}).
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12. RabbitMQ Boot Steps
-rabbit_boot_step({msg_store_bitcask_index,
[{description,
"Bitcask Index for rabbit_msg_store"},
{mfa, {application, set_env,
[rabbit, msg_store_index_module, ?MODULE]}},
{enables, recovery}]}).
Modify Configuration at Startup
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13. RabbitMQ Boot Steps
-rabbit_boot_step({external_infrastructure,
[{description, "external infrastructure ready"}]}).
Grouping Boot Steps
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16. Erlang Modules
-module(m). % module attribute
-export([fact/1]). % module attribute
-behaviour(Behaviour). % module attribute
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18. RabbitMQ Boot Steps
- rabbit_misc:all_module_attributes/1
- rabbit_misc:module_attributes/1
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19. RabbitMQ Boot Steps
- rabbit:boot_steps/0
- rabbit:sort_bootsteps/1
- rabbit_misc:build_acyclic_graph/3
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20. RabbitMQ Boot Steps
• Add order
• Add flexibility
• Very powerful tool
• Hidden gem in the Erlang world
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