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Play framework 2.5.0 Websockets example.
in play 2.5.0 websockets code is changed to support akka streams but I'm not able find a sample code to use it.
This will be properly documented in 2.5.1 as you can see here: https://github.com/playframework/playframework/issues/5057
In the meantime you can take a look at the Migration Guide which has a part on Streams:
https://www.playframework.com/documentation/2.5.x/StreamsMigration25#Migrating-WebSockets-%28WebSocket%29
You will notice that the important part is the WebSocket.MappedWebSocketAcceptor<In,Out> class. You use this one to tell Play how to convert Message frames to your own types - like String, Json, etc.
Fortunately the Java API of Play provides some predefined implementations. Let's say you want to handle WebSocket connections which exchange JSON data. Then you would use WebSocket.Json (https://github.com/playframework/playframework/blob/master/framework/src/play/src/main/java/play/mvc/WebSocket.java#L71)
return WebSocket.Json.accept(requestHeader -> {
// returns a Flow<JsonNode, JsonNode, ?>
})
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I am in search of a library to implement jsonrpc 2.0 in java with bidirecional support. I have found these two (JJsonRpc, jsonrpc4j) some recommendation of which one is better?
In the end I decided to write my own integration to the api json rpc using
OKHttp for HTTP connections and Jackson Core for fast JSON serialisation / deserialisation
Implementation Code:
https://github.com/AraguaneyBits/bitcoinrpc4java/blob/master/src/main/java/com/araguaneybits/crypto/bitcoinrpc/methods/BtcRpcGateway.java
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I've been using org.json for all my parsing needs in the past but now I'm deploying to a websphere application server v 7.0.0.22 which runs java 6 and I'm seeing unsupported exceptions indicating the org.json library is not supported there. Are there any other good json parsing library's that can be used with java version 6?
Jackson is good, but you can also use Google Gson :
https://github.com/google/gson
In my current job, we use Jackson from codehouse. We don't have any concerns with it, works very well on our environment. We use jboss instead of websphere though
http://jackson.codehaus.org/
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I'd like to run a SPARQL query using the MarkLogic Java API documented at http://docs.marklogic.com/guide/java . I've seen examples for running such queries from the console, via the REST API, or via XQuery. But I don't see how to do this using the Java API - is this possible to do?
Choose a toolkit (e.g. http://jena.apache.org/).
Being a W3C standard, any client library should be able to work with any server. The level of compliance to the standards is rally quite high.
Documentation:
http://jena.apache.org/documentation/query/app_api.html
(Disclosure: I contribute to Apache Jena).
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I have json rpc 2.0 server written in php. Currently I'm looking for a library that allows auto generation json rpc requests instead of using manual serialization.
I found a bunch of different libraries and really don't know which is more convenient. Did anybody successfully use one?
The best library json I've ever found is JSON-RPC 2.0
For making requests you will need base part of library. But if you want automatically handle server resonces you can take a look at client library. There are pretty much easy to understand tutorials. Hope it will help.
android-json-rpc is a pretty simple library.
Here is the documentation.
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Are there any OData provider SDKs for Ruby or Java?
There are providers for Ruby and Java here:
http://www.odata.org/developers/odata-sdk
Edit: Previous link is broken, as mentioned below the listing is here http://www.odata.org/libraries/
there is a project called odata4j on googlecode that can be used to implement producers and consumers. But i haven't tried it yet
Apache Olingo http://olingo.apache.org/ provides an OData Java Library that implements the Open Data Protocol 2.0, support for 4.0 is in Beta.
There are none, unfortunately.
There are only clients. I've used ruby_odata successfully. It works well against a simple model and provides mappings for all the basic query options, although you do need to know the operators (like eq, substringof, etc).
I did run into a more complex model and needed to tweak the code a bit. It's easy to pick up on: http://odetocode.com/Blogs/scott/archive/2010/07/11/odata-and-ruby.aspx
I published Safrano a few days ago. It's a small ruby based OData provider framework. It's far from complete and a bit experimental, but it may have some use case nevertheless