It's pretty easy!
1. (presto_home )/connectors/api/java/prestoconnect_for_java.zip has everything you need to use PC4J
2. extract and copy prestoconnect.jar to /webapps/presto/WEB-INF/lib directory
Next step is to write EMMLs to invoke PrestoConnect APIs I have included 2 samples below.
First one is simple one, invoking a Presto Platform service to "get list of all services" registered so far and the second one invokes a "Yahoo Local"
REST service by passing parameters like zip, query and results.
<?xml version="1.0"?> <mashup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation="http://www.jackbe.com/2008-03-01/EMMLSchema ../src/schemas/EMMLSpec.xsd" name="PrestoConnectEMML"> <operation name="invoke"> <output name="result" type="document"></output> <variable name="resultXml" type="string"></variable> <script type="text/javascript">
<![CDATA[
var serverAddress = "http://localhost:8080/presto/edge/api";
var factory= new Packages.com.jackbe.presto.connect.ConnectionFactory();
var connection = factory.create(serverAddress);
var authToken = connection.login("admin", "adminadmin");
var request = new Packages.com.jackbe.presto.connect.JUMPRequest();
var constants = new Packages.com.jackbe.presto.connect.common.PrestoConstants();
request.setVersion(constants.JUMP_PROTOCOL_1_1);
request.setSid("RDSService");
request.setOid("getListOfAllServices");
request.setSvcVersion("0.1");
request.setHeaderParameter(
constants.JUMP_REQUEST_HEADER_RESULT_FORMAT,
constants.JUMP_RESULT_FORMAT_XML);
request.setHeaderParameter(
constants.JUMP_RESPONSE_AUTH_TOKEN,
authToken);
var response = connection.invoke(request);
resultXml = response.getResponse();
]]>
</script> <assign fromvariable="resultXml" outputvariable="result"></assign> </operation>
</mashup> Once you have EMMLs in place, you can either test them without publishing or you can publish them as mashup service and invoke it as a service. To invoke without publishing,
1. go to (presto_home) /mashupclient/bin
2. emml.sh -u -p -f pc4j_YahooLocalREST_js.emml -url http://localhost:8080/presto/edge/api
To publish and invoke it as a service,
1. go to (presto_home) /mashupclient/bin
2. emmlpub.sh -u -p -f pc4j_YahooLocalREST_js.emml -url http://localhost:8080/presto/edge/api
3. now, you can invoke the service thru REST api or use it in Wires for mashing up with other services http://localhost:8080/presto/edge/api/rest/YahooLocalMashup/invoke?presto_username=$session/username&presto_password=$session/password
- Girish@JackBe
Matt asked me this one in the halls today...
'How do I do Presto Connect for Java calls inside of EMML? I know I need to include the Presto Connect jars but what would I need to do in order to make a jump request inside of EMML and paramaterize the request so it can be requested and paginated through the mashup?'