1 files changed, 120 insertions, 0 deletions
diff --git a/src/IvyHttpGatewayClient.java b/src/IvyHttpGatewayClient.java
new file mode 100644
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+++ b/src/IvyHttpGatewayClient.java
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+/*
+ * IvyHttpGatewayClient.java
+ */
+
+package fr.dgac.ivy.tools;
+
+import java.lang.*;
+import java.io.*;
+import java.net.*;
+
+
+/**
+ * Light remote client for the Ivy HTTP Gateway.
+ * This code is given as example only: it is not compulsery
+ * to use this client with the IvyHttpGatewayServlet.
+ * <strong>Warning:</strong> the error management is rather poor!
+ * <br><br>
+ *
+ * <strong>License:</strong><br>
+ * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+ * See IvyHttpGatewayServlet
+ *
+ * @see IvyHttpGatewayServlet
+ * @see fr.dgac.ivy
+ * @author Francis JAMBON - CLIPS-IMAG/MultiCom
+ * @version 1.0.5
+ */
+public class IvyHttpGatewayClient {
+    
+    private String name; // bus name
+    private String domain; // bus domain
+    private String url; // servlet URL
+    private boolean is_started; // bus state (supposed!)
+    private static final boolean debug=true; // debug option
+   
+    
+    /**
+     * Creates a new instance of IvyHttpGatewayClient.
+     * @param name the bus name
+     * @param url the servlet URL (protocol, host, port and complete servlet path)
+     */
+    public IvyHttpGatewayClient(String name, String url) {
+        this.name = name;
+        this.url = url;
+        this.domain = null;
+        this.is_started = false;
+    }
+    
+    
+    /**
+     * Starts the Ivy bus.
+     * @param domain the bus domain (address and port)
+     */
+    public void start(String domain) {
+        this.domain = domain;
+        if (!is_started) {
+            String request = this.url+"?"+"cmd=start"+"&name="+this.name+"&domain="+this.domain;
+            doHttpRequest(request);
+            this.is_started=true;
+        }
+    }
+    
+    
+    /**
+     * Stops the Ivy bus.
+     */
+    public void stop() {
+        if (is_started) {
+            String request = this.url+"?"+"cmd=stop"+"&name="+this.name+"&domain="+this.domain;
+            doHttpRequest(request);
+            this.is_started=false;
+        }
+    }
+    
+    
+    /**
+     * Sends a message to the Ivy bus.
+     * The bus must be started before sending a message.
+     * @param msg the message to be sent
+     */
+    public void sendMsg(String msg) {
+        if (is_started) {
+            String request = this.url+"?"+"cmd=sendmsg"+"&name="+this.name+"&domain="+this.domain+"&msg="+msg;
+            doHttpRequest(request);
+        }
+    }
+    
+    
+    /**
+     * Generic request to the servlet.
+     * @param request the URL (protocol, host, port, servlet path and parameters)
+     */
+    private static void doHttpRequest(String request) {
+        if (debug) System.out.println();
+        if (debug) System.out.println("-------------------- start of request ------------------");
+        if (debug) System.out.println("IvyHttpGatewayClient");
+        if (debug) System.out.println("REQUEST: "+request);
+        try {
+            URL servlet = new URL(request);
+            URLConnection connection = servlet.openConnection();
+            BufferedReader in = new BufferedReader(
+                    new InputStreamReader(
+                    servlet.openStream()));
+            String input_line;
+            if (debug) System.out.println("ANSWER:");
+            while ((input_line=in.readLine()) != null)
+                if (debug) System.out.println(input_line);
+            in.close();
+        } catch (MalformedURLException e) {
+            System.err.println("IvyHttpGatewayClient ERROR: URL Malformed");
+            if (debug) e.printStackTrace();
+        } catch (IOException e) {
+            System.err.println("IvyHttpGatewayClient ERROR: Open connection failed");
+            if (debug) e.printStackTrace();
+        }
+        if (debug) System.out.println("-------------------- end of request --------------------");
+        if (debug) System.out.println();
+    }  
+    
+}