On 07/02/2013 09:13 AM, Sebastien Blanc wrote:
Hi Folks,
As you know we have a Java Sender Library that can be used by any
backend application that want to send messages to the Unified Message
Push Server
(
https://github.com/aerogear/aerogear-unified-push-java-client).
The format is quite open and flexible as Matthias described it here :
https://gist.github.com/matzew/b21c1404cc093825f0fb
We can divide the creation of a message in 2 main parts :
- The "signalling" part : list of client identifiers / specific
devices etc ...
- The "core" message containing actually the information we want to push
Both are passed as Map and are finally converted into JSON.
Here an example of how a "core" message is build :
|Map categories = new HashMap();
categories.put("lead", "version="+leadVersion++);
Map json = new HashMap();
json.put("id", lead.getId());
json.put("messageType", "pushed_lead");
json.put("name", lead.getName());
json.put("location", lead.getLocation());
json.put("phone", lead.getPhoneNumber());
json.put("simple-push", categories);
json.put("sound" ,"default");
json.put("alert" ,"A new lead has been created");|
Even the format is open, we could "assist" a bit the developer in
building the message. For that we have different options :
- Propose a simple Message object containing the message "API" :
|Message message = new Message();
message.setClientIdentifiers("jake","maria");
message.enableSound();//by default use "default" or we could do
message.enableSound("boing")
message.setAlert("Watch out!);
message.setAttribute("customAttribute","yo"); // custom simple
strings
message.setAttribute("customStructure",myObject); // passing objects|
- Propose a Message Builder (following the Builder Pattern) to propose
a more fluent API :
|Message message = new Message().builder()
.clientIdentifiers("jake","maria")
.enableSound()
.alert("AAAAHHH!")
.attribute("customAttribute","yo")
.attribute("customStructure",myObject)
.build()|
- Same as above but more DSL focused (not sure about this one ;) )
|Message message = MessageDSL.to("jake","maria").withSound() //etc
...
|
So, beside that we have to discuss what we want allow to pass to the
message API : only Strings and simple Maps ? Full Objects that will be
JSONified ?
+1 to Strings and Simple Maps. JSONIfying full objects can be error
prone/tricky sometimes so -.5 to that.
I don't hate it would rather just not give people that gun to shoot
themselves with so soon ;)
Do we want also to separate the "signalling" part from the "core"
part
when building a message ?
Inputs and comments more than welcome !
I like the Builder. It is very simple,
very neutral, and very exact.
Seb
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