OAuth2 integration using JEE

Here we will show how to quickly integrate Sequencing OAuth2 harnesses into your JEE based environment.

There are several prerequisites in order to complete the integration:

you need to have a Sequencing account
you need to have an OAuth2 application secret
you need to have at one of IDEs - Eclipse, IntelliJ Idea or Netbeans

Complete working example of a project that has all following steps done you can find in our GitHub repositories - here for servlets and here for Spring. You can just clone it and by modifying OAuth2 related settings specified below get working project quickly.
We have also deployed this code so you can test it in action here.

Sequencing.com provides 2 possibilities to integrate OAuth2 for JEE environments

Pure servlet based
Spring boot based

Servlet based environment integration

1) Visit https://github.com/SequencingDOTcom/OAuth2-code-with-demo repository
2) Clone repository locally to your environment

$ git clone https://github.com/SequencingDOTcom/OAuth2-code-with-demo.git

3) Servlet based Maven project is in "java-servlet" folder

4) Review pom.xml and integrate dependencies into your project

5) Review web.xml and integrate servlet definitions into your project

6) Copy classes from com.sequencing.oauth2demo.servlet to your project

7) Edit configuration settings in SequencingServletContextListener class so to make them conform your OAuth2 application settings. Make sure that application name, secret and redirect URL matches.
OAuth2 management interface is available in the developer center under "Manage OAuth2 secrets" section.

SequencingServletContextListener snippet from the repository	SequencingServletContextListener snippet with actual OAuth data
public AuthenticationParameters getAppConfig() { return new AuthenticationParameters.ConfigurationBuilder() .withRedirectUri("https://java-oauth-demo.sequencing.com/Default/Authcallback") .withClientId("oAuth2 Demo Java") .withClientSecret("vuwpK04r7ylcbe1oUJCrDXza7dj33ejcUkBY06jrmzYiYw8LEmd1IkUZnKBCmv-fiuIhQkCm_qNWoQ81eCsY7A") .build(); }	public AuthenticationParameters getAppConfig() { return new AuthenticationParameters.ConfigurationBuilder() .withRedirectUri("http://feedme.com/Default/AuthCallback") .withClientId("feedme") .withClientSecret("RCGK_tcZliZw2z5BqCSr_r-psBTTGBqji_WWEyjNZnp8-eQ1hgle5d1IS_of_U7wkshNvCqXBs25B6Q7JL1EBA") .build(); }

After authorization is completed tokens can be accessed by following call. We recommend keeping them safe.

SequencingOAuth2Client oauthClient = (SequencingOAuth2Client) config.getServletContext().getAttribute(SequencingServletContextListener.CFG_OAUTH_HANDLER); oauthClient.getToken();

Spring boot based environment integration

1) Visit https://github.com/SequencingDOTcom/OAuth2-code-with-demo repository
2) Clone repository locally to your environment

$ git clone https://github.com/SequencingDOTcom/OAuth2-code-with-demo.git

3) Servlet based Maven project is in "java-spring" folder

4) Review pom.xml and integrate dependencies into your project

6) Copy classes from com.sequencing.oauth2demo to your project

7) Edit configuration settings in application.properties file so to make them conform your OAuth2 application settings. Make sure that application name, secret and redirect URL matches.
OAuth2 management interface is available in the developer center under "Manage OAuth2 secrets" section.

application.properties snippet from the repository	application.properties snippet with actual OAuth2 tokens
redirectUri=https://java-oauth-demo.sequencing.com/Default/Authcallback clientId=oAuth2 Demo Java clientSecret=vuwpK04r7ylcbe1oUJCrDXza7dj33ejcUkBY06jrmzYiYw8LEmd1IkUZnKBCmv- fiuIhQkCm_qNWoQ81eCsY7A	redirectUri=http://feedme.com/Default/AuthCallback clientId=feedme clientSecret=RCGK_tcZliZw2z5BqCSr_r-psBTTGBqji_WWEyjNZnp8- eQ1hgle5d1IS_of_U7wkshNvCqXBs25B6Q7JL1EBA

After authorization is completed tokens can be accessed by following call. We recommend keeping them safe.

// inject dependency first @Autowired private SequencingOAuth2Client oauth; // access token in this way oauth.getToken();

Testing result

1) Deploy and start application

2) Point your browse to http://feedme.com/Default/AuthCallback
It will trigger redirect to Sequencing authorization page

After entering credentials you will be presented with access approval which contains application details

After clicking on "Yes (I authorize access)" result page will render (result.php) that contains list of sample files available in your account

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