How to Run a Job on the Server to Generate Data through REST AP
The following example demonstrates how a job created on the Repertoire Server can be invoked from the application side through the REST API.
This example would be applicable in situations where specific datasets are required on an ad-hoc basis.
Import the following Java references within the class environment:
import java.io.ByteArrayOutputStream;
import java.io.File;
To talk to the server via the REST API add the following .jar files from the “/lib” directory of the Repertoire Server installation:
commons-codec-1.3.jar
commons-httpclient-3.0.1.jar
commons-logging.jar
and import them into the class file:
import org.apache.commons.httpclient.Credentials;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.ByteArrayRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.PutMethod;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.apache.commons.httpclient.params.HttpClientParams;
//This method takes in the host url, port number and credentials to
//establish a connection to the Repertoire Server
public static HttpClient ERSConnect(String host,Integer port,String username,String password,String CredentialCharset)
{
HttpClient client = new HttpClient();
Credentials defaultCreds = new UsernamePasswordCredentials(username,password);
client.getState().setCredentials(new AuthScope(host,port,AuthScope.ANY_REALM), defaultCreds);
HttpClientParams params = client.getParams();
params.setCredentialCharset(CredentialCharset);
params.setAuthenticationPreemptive(true);
return client;
}
After the abovementioned method is created implement the following set of code:
//Create a variable to hold the URL
String ERSURL = “http://localhost:8080”;
//Instantiate a new connection to the Repertoire Server
HttpClient client = ERSConnect(“localhost”,8080,“admin”,“sa”,“UTF-8”);
//Instantiate a new post method with the path of the job on the server
//and the output path of the mime-type
PostMethod post = new PostMethod(ERSURL+"/job/Elixir_Cookbook/Schedule-Designer/GenerateData/datasources/GenerateData-Sample-001.job?Fruit=Apple&URL=file:/c:/temp/testjob.csv");
//Execute the post method using the client connection
int ret = client.executeMethod(post);
if (ret==200) System.out.println(“Successful !”);
else System.out.println("Error ! " );
Below are explanations and walk throughs of the code. The full Java class can be downloaded here