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Section
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titleContents of this Page
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Include Page
Menu LexEVS 6.x Programmers to Include
Menu LexEVS 6.x Programmers to Include

 


Introduction

The focus of documentation will be the Java based LexEVS remote method invocation service.  

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Info
titleThis is the only caCore API available in 6.5
 

Overview

This exposes the LexEVS Service model via a Remote Method Invocation service.

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Code Block
languagexml
themeEclipse
  <dependencies>

  <dependency>

  	<groupId>lexevs.dist.client</groupId>

	<artifactId>lexevs.dist.client</artifactId>

	<version>6.5.0.FINAL</version>

  </dependency>

  </dependencies>

 


Users should be able to access a remote service with code similar to the following (Service URL should be adjusted to a valid LexEVS API service such as the one hosted at NCI): 


Code Block
languagejava
themeEclipse
package org.lexgrid.lexevs.remote.client;

import org.LexGrid.LexBIG.DataModel.Collections.CodingSchemeRenderingList;
import org.LexGrid.LexBIG.DataModel.InterfaceElements.CodingSchemeRendering;
import org.LexGrid.LexBIG.Exceptions.LBInvocationException;
import org.LexGrid.LexBIG.caCore.interfaces.LexEVSDistributed;

import gov.nih.nci.system.client.ApplicationServiceProvider;

public class MavenBasedPrototype {

	LexEVSDistributed lbs = null;
	private static String serviceUrl = "https://localhost.daplie.com:8443/lexevsapi65";
	public void run() throws LBInvocationException{
		try {
			lbs = (LexEVSDistributed)ApplicationServiceProvider.getApplicationServiceFromUrl(serviceUrl, "EvsServiceInfo");
	}
		catch(Exception e){
			System.out.println("Starting LexEVS Remote Client fails" + e);
	}

	CodingSchemeRenderingList list = lbs.getSupportedCodingSchemes();
		for(CodingSchemeRendering rendering: list.getCodingSchemeRendering()){
			System.out.println(rendering.getCodingSchemeSummary().getFormalName());
		}
	}

	public static void main(String[] args) {
		try {
			new MavenBasedPrototype().run();
		} catch (LBInvocationException e) {
			e.printStackTrace();
		}
	}
}

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Background:
Architecture
The LexEVS API is exposed by the LexEVS caCORE System for remote access through the caCORE System's LexEVSApplicationService class which implements the LexBIGService interface.
The distributed LexEVS API environment will be configured on the LexEVS Server currently at (https://lexevsapi6lexevsapi65.nci.nih.gov/lexevsapi64lexevsapi65/).
LexEVS Annotations
To address LexEVS DAOs, the LexEVS API integration incorporates:
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The interceptor is responsible for intercepting all client calls on the methods in each object. If a method is marked with the @lgClientSideSafe annotation, it proceeds normally. Otherwise, the object, method name, and parameters are sent to the caCORE LexEVS server for remote execution.
 
 


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