Giters

balamurugan-venkadachalam / gcp-appengine-standard-example

Geek Repo:Geek Repo

Github PK Tool:Github PK Tool

Standard Enviroment

App Engine uses Jetty Web Server 9 with servlet 3.1 along with accompanying technologies such as JSP, JSF, Struts required workaround.

appengine-standard-archetype

This is a generated App Engine Standard Java application from the appengine-standard-archetype archetype.

See the Google App Engine standard environment documentation for more detailed instructions.

Setup

gcloud init
gcloud auth application-default login

Maven

Running locally

mvn appengine:devserver

Deploying

mvn appengine:update

Testing

mvn verify

As you add / modify the source code (src/main/java/...) it's very useful to add unit testing to (src/main/test/...). The following resources are quite useful:

Updating to latest Artifacts

An easy way to keep your projects up to date is to use the maven [Versions plugin][versions-plugin].

mvn versions:display-plugin-updates
mvn versions:display-dependency-updates
mvn versions:use-latest-versions

Note - Be careful when changing javax.servlet as App Engine Standard uses 3.1 for Java 8, and 2.5 for Java 7.

Our usual process is to test, update the versions, then test again before committing back.

Scaling

App Engine supports the following scaling types, which controls how and when instances are created:

  • Auto Scaling
  • Manual Scaling
  • Basic Scaling

https://cloud.google.com/appengine/docs/standard https://cloud.google.com/appengine/docs/standard/java/how-instances-are-managed#scaling_dynamic_instances

URL Pattern

https://VERSION_ID-dot-SERVICE_ID-dot-PROJECT_ID.REGION_ID.r.appspot.com

For example

https://20200419t154727-dot-test-dot-first-gcp-project.uc.r.appspot.com

more details please refer here

Instance Class

Instance Class Memory Limit CPU Limit Supported Scaling Types
F1 (default) 256 MB 600 MHz automatic
F2 512 MB 1.2 GHz automatic
F4 1024 MB 2.4 GHz automatic
F4_1G 2048 MB 2.4 GHz automatic
B1 256 MB 600 MHz manual, basic
B2 (default) 512 MB 1.2 GHz manual, basic
B4 1024 MB 2.4 GHz manual, basic
B4_1G 2048 MB 2.4 GHz manual, basic
B8 2048 MB 4.8 GHz manual, basic

Please refer here

Spring Boot Application

Because App engine standard is running in a Jetty Web Server, the default configuration for a Spring Boot application will not work. This causes several conflicts because Spring Boot uses an embedded Tomcat Web Server. More information about the configuration of a Spring Boot application for the standard environment can be found here.

Debug

GCP console -> App Engine -> Dashboad -> select service -> Debug -> select load appropriate code from github or gcp repo

Reference

About

Languages

Language:Java 100.0%