ascrutae commented on issue #855: Begin SkyWalking 5.0.0-alpha e2e integration test. URL: https://github.com/apache/incubator-skywalking/issues/855#issuecomment-369851626 The process of test case as following: portal service receive key from http request, and it call the cache query service and query the key on the mysql service. finally update the cache by the new key. BTW, there are three layer on cache service: Redis, embed h2 database and mongo DB. The call graph as following: <img width="577" alt="wx20170412-163927 2x" src="https://cloud.githubusercontent.com/assets/12436447/24948960/a00c9e90-1f9e-11e7-9ac1-b304a8301f0f.png"> Portal Server: Entry of test case. Portal Server run in tomcat container. Cache Server: Cache service provide query and update cache. and it run in motan. **NOTE:** It will start H2 database when the server start Persistence Server: Persistence service provide query data from mysql, and it initial data when persistence service start. it run in Dubbo with rest protocol.
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