Launching simple echo experiment in Apache Airavata

Apache Airavata is a science gateway application that enables managing different scientific computational tasks among computational resources. Here I describe how to register a simple echo application in Airavata and launch it using Airavata API

1. Clone Airavata source https://github.com/apache/airavata/tree/0.14_release and build

2. Start Airavata server as given in https://cwiki.apache.org/confluence/display/AIRAVATA/XBAYA+Quick-Start+Tutorial

3. Run Sample class to register echo application
https://github.com/apache/airavata/blob/0.14_release/airavata-api/airavata-client-sdks/java-client-samples/src/main/java/org/apache/airavata/client/samples/RegisterSampleData.java

4. Run following command to create and run the experiment

Airavata.Client airavataClient = AiravataClientFactory.createAiravataClient("127.0.0.1", 8930);

String appId = "Echo_e82aa96b-66ea-4f31-97e7-1182a32e55d2";

List exInputs = new ArrayList();
InputDataObjectType input = new InputDataObjectType();
input.setName("Input_to_Echo");
input.setType(DataType.STRING);
input.setValue("Echoed_Output=Hello World");
exInputs.add(input);

List exOut = new ArrayList();
OutputDataObjectType output = new OutputDataObjectType();
output.setName("Echoed_Output");
output.setType(DataType.STRING);
output.setValue("");
exOut.add(output);

Experiment simpleExperiment = ExperimentModelUtil.createSimpleExperiment("default", "admin", "echoExperiment", "Echo Exp", appId, exInputs);
simpleExperiment.setExperimentOutputs(exOut);

Map computeResources = getClient().getAvailableAppInterfaceComputeResources(appId);
String id = computeResources.keySet().iterator().next();
String resourceName = computeResources.get(id);
System.out.println(computeResources.size());
System.out.println(id);
System.out.println(resourceName);
ComputationalResourceScheduling scheduling = ExperimentModelUtil.createComputationResourceScheduling(id, 1, 1, 1, "normal", 30, 0, 1, "sds128");
UserConfigurationData userConfigurationData = new UserConfigurationData();
userConfigurationData.setAiravataAutoSchedule(false);
userConfigurationData.setOverrideManualScheduledParams(false);
userConfigurationData.setComputationalResourceScheduling(scheduling);
simpleExperiment.setUserConfigurationData(userConfigurationData);

String exp = airavataClient.createExperiment(simpleExperiment);
airavataClient.launchExperiment(exp,"sample");