Merge branch 'master' of https://github.com/eugenp/tutorials

libraries/src/main/java/com/baeldung/caffeine/DataObject.java

@@ -1,9 +1,13 @@
 package com.baeldung.caffeine;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 final class DataObject {
     private final String data;
 
     private static int objectCounter = 0;
+    private static final Logger log = LoggerFactory.getLogger(DataObject.class);
 
     private DataObject(String data) {
         this.data = data;
@@ -22,7 +26,7 @@ final class DataObject {
 
     public static DataObject get(String data) {
         objectCounter++;
-        System.out.println(String.format("Initializing DataObject#%d with data '%s'", objectCounter, data));
+        log.info("Init DataObject#{} with '{}'", objectCounter, data);
         return new DataObject(data);
     }
 }

rmi/client.policy

@@ -0,0 +1,3 @@
+grant {
+    permission java.security.AllPermission;
+};

rmi/server.policy

@@ -0,0 +1,3 @@
+grant {
+    permission java.security.AllPermission;
+};

rmi/src/org/baeldung/Client.java

@@ -0,0 +1,20 @@
+package org.baeldung;
+
+import java.rmi.NotBoundException;
+import java.rmi.RemoteException;
+import java.rmi.registry.LocateRegistry;
+import java.rmi.registry.Registry;
+
+public class Client {
+    public static void main(String[] args) throws RemoteException, NotBoundException {
+        System.setProperty("java.security.policy", "file:./client.policy");
+        if (System.getSecurityManager() == null) {
+            System.setSecurityManager(new SecurityManager());
+        }
+        String name = "RandomNumberGenerator";
+        Registry registry = LocateRegistry.getRegistry();
+        RandomNumberGenerator randomNumberGenerator = (RandomNumberGenerator) registry.lookup(name);
+        int number = randomNumberGenerator.get();
+        System.out.println("Received random number:" + number);
+    }
+}

rmi/src/org/baeldung/RandomNumberGenerator.java

@@ -0,0 +1,8 @@
+package org.baeldung;
+
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+
+public interface RandomNumberGenerator extends Remote{
+    int get() throws RemoteException;
+}

rmi/src/org/baeldung/RandomNumberGeneratorEngine.java

@@ -0,0 +1,10 @@
+package org.baeldung;
+
+import java.rmi.RemoteException;
+
+public class RandomNumberGeneratorEngine implements RandomNumberGenerator {
+    @Override
+    public int get() throws RemoteException {
+        return (int) (100 * Math.random());
+    }
+}

rmi/src/org/baeldung/Server.java

@@ -0,0 +1,22 @@
+package org.baeldung;
+
+import java.rmi.RemoteException;
+import java.rmi.registry.LocateRegistry;
+import java.rmi.registry.Registry;
+import java.rmi.server.UnicastRemoteObject;
+
+public class Server {
+    public static void main(String[] args) throws RemoteException {
+        System.setProperty("java.security.policy", "file:./server.policy");
+        if (System.getSecurityManager() == null) {
+            System.setSecurityManager(new SecurityManager());
+        }
+        String name = "RandomNumberGenerator";
+        RandomNumberGenerator randomNumberGenerator = new RandomNumberGeneratorEngine();
+        RandomNumberGenerator stub =
+                (RandomNumberGenerator) UnicastRemoteObject.exportObject(randomNumberGenerator, 0);
+        Registry registry = LocateRegistry.getRegistry();
+        registry.rebind(name, stub);
+        System.out.println("RandomNumberGenerator bound");
+    }
+}