initialcapacity/application-continuum

Evolution of a cloud native architecture

Application Continuum

The evolution of a component based architecture

See Git tags for step-by-step notes.

git tag -ln

v1              First commit
v2              Functional groups
v3              Feature groups (Bounded Context)
v4              Components
v5              Applications
v6              Services
v7              Databases
v8              Versioning
v9              Service Discovery
v10             Circuit Breaker

Database Setup

Redis

brew install redis

Modify /usr/local/etc/redis.conf

requirepass foobared

MySQL

brew install mysql

Modify /usr/local/etc/my.cnf

default-time-zone='+00:00'

mysql -uroot --execute="drop user 'uservices'@'localhost'"
mysql -uroot --execute="create user 'uservices'@'localhost' identified by 'uservices';"

for database_name in 'allocations' 'backlog' 'registration' 'timesheets'; do
    mysql -uroot --execute="drop database if exists ${database_name}_test"
    mysql -uroot --execute="create database ${database_name}_test"
    mysql -uroot --execute="grant all on  ${database_name}_test.* to 'uservices'@'localhost';"
    mysql -uroot --execute="grant select on performance_schema.* to 'uservices'@'localhost';"
done

Schema Migrations

for database_name in 'allocations' 'backlog' 'registration' 'timesheets'; do
    flyway -user=uservices -password=uservices -url="jdbc:mysql://localhost:3306/${database_name}_test" -locations=filesystem:databases/${database_name}-database clean migrate
done

Test and Production Environment

export PORT=8081

export VCAP_SERVICES='{"p-mysql": [{"credentials": {"jdbcUrl": "jdbc:mysql://localhost:3306/allocations_test?user=uservices&password=uservices"}, "name": "allocations"}, {"credentials": {"jdbcUrl": "jdbc:mysql://localhost:3306/backlog_test?user=uservices&password=uservices"}, "name": "backlog"}, {"credentials": {"jdbcUrl": "jdbc:mysql://localhost:3306/registration_test?user=uservices&password=uservices"}, "name": "registration"}, {"credentials": {"jdbcUrl": "jdbc:mysql://localhost:3306/timesheets_test?user=uservices&password=uservices"}, "name": "timesheets"}], "rediscloud": [{"credentials": {"hostname": "localhost", "password": "foobared", "port": 6379}, "name": "discovery"}]}'

export DISCOVERY_SERVER_ENDPOINT=http://localhost:8888

Note: The registration server endpoint port must match the port used in the FlowTest