9.4. Java Client Code
The following code is an example of interacting with Red Hat JBoss Data Grid REST API using Java.
Imports
Define imports as follows:
import java.io.BufferedReader;import java.io.IOException; import java.io.InputStreamReader;import java.io.OutputStreamWriter; import java.net.HttpURLConnection;import java.net.URL;
Add a String Value to a Cache
The following is an example of using Java to add a string value to a cache:
public class RestExample { /** * Method that puts a String value in cache. * @param urlServerAddress * @param value * @throws IOException */ public void putMethod(String urlServerAddress, String value) throws IOException { System.out.println("----------------------------------------"); System.out.println("Executing PUT"); System.out.println("----------------------------------------"); URL address = new URL(urlServerAddress); System.out.println("executing request " + urlServerAddress); HttpURLConnection connection = (HttpURLConnection) address.openConnection(); System.out.println("Executing put method of value: " + value); connection.setRequestMethod("PUT"); connection.setRequestProperty("Content-Type", "text/plain"); connection.setDoOutput(true); OutputStreamWriter outputStreamWriter = new OutputStreamWriter(connection.getOutputStream()); outputStreamWriter.write(value); connection.connect(); outputStreamWriter.flush(); System.out.println("----------------------------------------"); System.out.println(connection.getResponseCode() + " " + connection.getResponseMessage()); System.out.println("----------------------------------------"); connection.disconnect(); }
Get a String Value from a Cache
The following code is an example of a method used that reads a value specified in a URL using Java to interact with the JBoss Data Grid REST Interface.
/** * Method that gets an value by a key in url as param value. * @param urlServerAddress * @return String value * @throws IOException */ public String getMethod(String urlServerAddress) throws IOException { String line = new String(); StringBuilder stringBuilder = new StringBuilder(); System.out.println("----------------------------------------"); System.out.println("Executing GET"); System.out.println("----------------------------------------"); URL address = new URL(urlServerAddress); System.out.println("executing request " + urlServerAddress); HttpURLConnection connection = (HttpURLConnection) address.openConnection(); connection.setRequestMethod("GET"); connection.setRequestProperty("Content-Type", "text/plain"); connection.setDoOutput(true); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream())); connection.connect(); while ((line = bufferedReader.readLine()) != null) { stringBuilder.append(line + '\n'); } System.out.println("Executing get method of value: " + stringBuilder.toString()); System.out.println("----------------------------------------"); System.out.println(connection.getResponseCode() + " " + connection.getResponseMessage()); System.out.println("----------------------------------------"); connection.disconnect(); return stringBuilder.toString(); }
The following code is an example of a java main method.
/** * Main method example. * @param args * @throws IOException */ public static void main(String[] args) throws IOException { //Note that the cache name is "cacheX" RestExample restExample = new RestExample(); restExample.putMethod("http://localhost:8080/rest/cacheX/1", "Infinispan REST Test"); restExample.getMethod("http://localhost:8080/rest/cacheX/1"); } } }