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Re: Domino REST performance analysis
Thu, Mar 16th 2017 73
Domino & Java 1.8: Thank you, IBM!
Tue, Mar 14th 2017 21
Domin & REST: Debug your Plugin
Tue, Mar 7th 2017 11
Domino & REST: More about Jackson
Fri, Mar 3rd 2017 7
Domino & REST: Accessing Domino’s Environment / Check Authentication
Thu, Mar 2nd 2017 8
Domino & REST: Consuming JSON
Wed, Mar 1st 2017 11
Domino & REST: A basic Servlet
Tue, Feb 28th 2017 15
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Re: Domino REST performance analysis
Thu, Mar 16th 2017 73
Domino & Java 1.8: Thank you, IBM!
Tue, Mar 14th 2017 21
Domino & REST: A basic Servlet
Tue, Feb 28th 2017 15
Jackson: Skip Objects conditionally
Wed, Feb 8th 2017 12
Domino & REST: Consuming JSON
Wed, Mar 1st 2017 11
Domin & REST: Debug your Plugin
Tue, Mar 7th 2017 11
XPages: Running Google’s Chrome V8 Javascript Engine
Sun, Nov 9th 2014 9
Hardening SSH vs. Eclipse RSE
Tue, Jan 13th 2015 9
Testing XPages (2): BrowserMob Proxy
Thu, Sep 17th 2015 9
REST & Security: CSRF Attacks
Tue, Dec 30th 2014 8


XPages: Running Google’s Chrome V8 Javascript Engine
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Sven Hasselbach    

After answering a question on Stackoverflow.com about the Prototype problematic in the XPages SSJS engine, I thought of running another Javascript engine on top of Domino.

While you can use the JavaScripting API JSR223, I choosed the jav8 project for a test how this can be realized. So I downloaded the Windows binaries to get the required DLL and imported it into a new database. I also imported the source files of the lu.fler.script package to recompile all required classes.

Then, I registered the factory service by creating a javax.script.ScriptEngineFactory file in the /META-INF/services folder and added the line lu.flier.script.V8ScriptEngineFactory.

The package explorer looked like this:

To prevent collisions, I commented out some names in the V8ScriptEngineFactory class:

For a simple test, I decided to invoke the engine manually when clicking on a button on a XPage. To do this, I created a simple ActionListener in Java which loads the JavaScript Engine and evals a simple ” var i = 1+1″. The Javascript variable is then accessed and printed out to the server console.

package ch.hasselba.xpages.jav8;

import javax.faces.event.AbortProcessingException;
import javax.faces.event.ActionEvent;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class JAV8Test implements javax.faces.event.ActionListener {

    static ScriptEngineManager factory = new ScriptEngineManager();
    static ScriptEngine engine = factory.getEngineByName("jav8");

    public void processAction(ActionEvent actionEvent)
            throws AbortProcessingException {
        try {
            System.out.println( engine.getClass().getCanonicalName() );
            engine.eval("var i=1+1;");
            System.out.println( "i = " + engine.get("i") );
        } catch (ScriptException ex) {
            ex.printStackTrace();
        }
    }
}

The XPage to test the ActionListener is rather simple too:

<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">

    <xp:button
        value="Click Me!"
        id="buttonClickMe">
        <xp:eventHandler
            event="onclick"
            submit="true"
            refreshMode="complete">
            <xp:this.actionListeners>
                <xp:actionListener type="ch.hasselba.xpages.jav8.JAV8Test" />
            </xp:this.actionListeners>
        </xp:eventHandler>
    </xp:button>
    
</xp:view>

When the button is clicked, the V8 engine works as it should:
http://hasselba.ch/blog/?p=1746
Nov 09, 2014
10 hits



Recent Blog Posts
73
Re: Domino REST performance analysis
Thu, Mar 16th 2017 8:51p   Sven Hasselbach
I have created a Quick-n-Dirty performance test for Csaba’s „10K record test“: Loading time 200 ms overall, 60 ms TTFB. Do you want to know how this works? Feel free to come to SNoUG next week or to Rudi’s EntwicklerCamp and join my sessions.
21
Domino & Java 1.8: Thank you, IBM!
Tue, Mar 14th 2017 1:16p   Sven Hasselbach
For years it was a lot of pain when developing for the Domino platform using Java 1.6 only. But now, Java 1.8 is available, and this allows to use the latest versions for a lot of libraries and development tools. After installing FP8 to the Client, Eclipse allowes to use the Domino JRE in a JavaSE-1.8 environment: This gives access to the latest M2Eclipse plugin (1.7.0). The old version problem when running with JRE 1.6… … is solved: Eclipse Updates? No problem, just do it! Latest
11
Domin & REST: Debug your Plugin
Tue, Mar 7th 2017 11:14a   Sven Hasselbach
When developing OSGi Plugins, you should have your own development server running on your local machine. Not only because of the faster deployment of changes (a new version of a plugin must always deployed with a HTTP restart), but because of the Java debugging posibilities: Only one Eclipse instance can connect to the JVM, and every request processed by the server will start the debugger. If multiple users a accessing the server while you are debugging, your Eclipse will try to debug every inco
7
Domino & REST: More about Jackson
Fri, Mar 3rd 2017 10:16a   Sven Hasselbach
When creating a REST API servlet, Jackson provides a huge list of possibilities to manipulate the JSON data, mostly using annotations. Let’s demonstrate some of them with this little class, which has only two properties: public class Demo { private String foo; private String bar; public String getFoo() { return foo; } public void setFoo(String foo) { this.foo = foo; } public String getBar() { return bar; } public void setBar(String bar) { this.bar = ba
8
Domino & REST: Accessing Domino’s Environment / Check Authentication
Thu, Mar 2nd 2017 11:00a   Sven Hasselbach
If we want to access Domino’s Environment, it is the ContextInfo class which gives us all we need. Everything you need to do to use the class is described in an earlier blog post. The class gives mainly access to the following methods: Method Description getDataDirectory() Path to notes data directory getEnvironmentString(String envName) Returns the environment variable getServerDatabase() The actual database as NAPI object, if any getServerVariable(String varName) Variables
11
Domino & REST: Consuming JSON
Wed, Mar 1st 2017 7:25a   Sven Hasselbach
Consuming JSON is as easy as pie: Just create a new method to the RestApiServlet,  add a @POST annotation, and declare the object you want to the parameters of the method:     @POST     @Path("/helloworld/")     @Consumes(MediaType.APPLICATION_JSON)     public Response postHelloWorld(HelloWorld helloWorld) {         return Response.ok(helloWorld, MediaType.APPLICATION_JSON).build();     } In this example we are using the same URI „/helloworld/„; because
15
Domino & REST: A basic Servlet
Tue, Feb 28th 2017 1:49p   Sven Hasselbach
To have a good starting point when creating RESTful applications on top of Domino, I have created a „Hello World“ example of a JEE Application, based on Apache Wink & Jackson 2.5.0. The Jackson AnnotaionProcessor is registered into Apache Wink application and is enabled by default, the JAXB processor is also included as the secondary AnnotationProcessor. The benefit of this is that only one global ObjectMapper instance is created and is reused, wich allows a better performance as
8
Domino & REST: Listeners for Initialization & Destroying of a Servlet
Mon, Feb 27th 2017 9:15a   Sven Hasselbach
If you need to know when your Servlet is initialized or destroyed, you can use a ServletContextListener in your application. First, create the class AppServletContextListener and implement the javax.servlet.ServletContextListener interface. This provides two methods for capturing the events: contextInitialized and contextDestroyed: package ch.hasselba.servlet; import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; public class AppServletContextListener  
12
Jackson: Skip Objects conditionally
Wed, Feb 8th 2017 7:51a   Sven Hasselbach
I had a simple problem when implementing this brilliant solution in one of my REST applications: As soon I was using @JsonAnyGetter / @JsonAnySetter and the HidableSerializer together, a NPE was thrown during serialization. The Problem occured in Jackson 1.9.13 and even 2.5.0, the latest version usable with the actual Domino JVM. Stack Trace org.codehaus.jackson.map.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: ch.hasselba.Test["[anySetter]"]) null  
8
Entwicklercamp 2017: Meine Vorträge & Hands-On
Thu, Jan 19th 2017 7:51a   Sven Hasselbach
Dieses Jahr spreche ich wieder auf dem Entwicklercamp, und halte neben den Vorträgen auch noch eine Hands-On Session: Track 1 – Session 2: XPages erweitern und ausbauen – Ausgabe 2017 Im Laufe des Jahres 2016 kamen einige Themen hinzu, und dank FP8 wird es wohl auch einige Neuerungen geben, über die man mal reden müsste… Track 4 – Session 3: High-Performance REST Applications Hochperformante REST Schnittstellen entwickeln, die auf dem Domino Server laufen? Der Vor




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