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https://issues.apache.org/jira/browse/S4-5?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13169547#comment-13169547
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Leo Neumeyer commented on S4-5:
-------------------------------
I had to add a couple of elements.
# To define a stream we need the event type and the property name. The property
name needs to match exactly the property name used by a ProcessingElement that
consumes this stream. I dont' think there is a way around that and of course it
is not type safe.
# Concrete PEs need configuration properties. To pass them using a generic API,
I use the method property(String key, Object value).
Let ne know what you think. Will this be easy to understand given the required
conventions?
{code:title=S4 Fluent API|borderStyle=dashed}
package org.apache.s4.appmaker;
public class MyApp extends AppMaker {
@Override
protected void configure() {
PEMaker pez, pey;
StreamMaker s1;
StreamMaker s2, s3;
pez = addPE(PEZ.class);
s1 = addStream("stream1", EventA.class).withName("My first
stream.").withKey("{gender}").to(pez);
pey = addPE(PEY.class).to(s1).property("duration",
4).property("height", 99);
s2 = addStream("stream2", EventB.class).withName("My second
stream.").withKey("{age}").to(pey).to(pez);
s3 = addStream("stream3", EventB.class).withKey("{height}").to(pey);
addPE(PEX.class).to(s2).to(s3).property("keyword", "money");
}
}
{code}
> Prototype app builder
> ---------------------
>
> Key: S4-5
> URL: https://issues.apache.org/jira/browse/S4-5
> Project: Apache S4
> Issue Type: New Feature
> Affects Versions: 0.5
> Reporter: Leo Neumeyer
> Priority: Minor
> Fix For: 0.5
>
>
> Extend Guice AbstractModule to create a simple application builder layer. The
> idea is to evaluate if we can use Guice to do all the wiring including PEs
> and Streams and Apps.
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