From 2dfd7b6611363b542a7967ffbba0d32ce5eb5b6f Mon Sep 17 00:00:00 2001
From: Johann Latocha
Date: Tue, 31 Jul 2012 19:32:18 +0200
Subject: Delete image

---
 src/main/java/org/openslx/dnbd3/DNBD3Server.java | 89 +++++++++++++++---------
 1 file changed, 57 insertions(+), 32 deletions(-)

(limited to 'src/main/java/org/openslx/dnbd3/DNBD3Server.java')

diff --git a/src/main/java/org/openslx/dnbd3/DNBD3Server.java b/src/main/java/org/openslx/dnbd3/DNBD3Server.java
index 1ac2e73..4830010 100644
--- a/src/main/java/org/openslx/dnbd3/DNBD3Server.java
+++ b/src/main/java/org/openslx/dnbd3/DNBD3Server.java
@@ -18,63 +18,76 @@ public class DNBD3Server {
     private static final int CMDSTOP = 0;
     private static final int CMDRELOAD = 1;
     private static final int CMDINFO = 2;
-    private static final int CMDCONFIG = 3;
+    private static final int CMDADDIMG = 3;
+    private static final int CMDDELIMG = 4;
 
     private static final String HOST = "127.0.0.1";
     private static final int PORT = 5004;
 
     public void doReload() throws IOException, DNBD3Exception {
-        Socket sock = new Socket(HOST, PORT);
-        sendHeader(sock, new DNBD3Header(CMDRELOAD, 0, 0));
-        receiveHeader(sock);
-        sock.close();
+        sndCommand(CMDRELOAD);
     }
 
     public void doShutdown() throws IOException, DNBD3Exception {
-        Socket sock = new Socket(HOST, PORT);
-        sendHeader(sock, new DNBD3Header(CMDSTOP, 0, 0));
-        receiveHeader(sock);
-        sock.close();
+        sndCommand(CMDSTOP);
     }
 
     public void addImage(Image image) throws Exception {
         Info info = new Info();
         info.getImages().add(image);
-        ByteArrayOutputStream os = new ByteArrayOutputStream();
-        new Persister().write(info, os);
-        Socket sock = new Socket(HOST, PORT);
-        sendHeader(sock, new DNBD3Header(CMDCONFIG, os.size(), 0));
-        sock.getOutputStream().write(os.toByteArray());
-        receiveHeader(sock);
-        sock.close();
+        sndData(CMDADDIMG, info);
+        doReload();
+    }
+    
+    public void delImage(Image image) throws Exception {
+        Info info = new Info();
+        info.getImages().add(image);
+        sndData(CMDDELIMG, info);
+        doReload();
     }
 
     public List<Image> getImages() throws Exception {
-        Socket sock = new Socket(HOST, PORT);
-        sendHeader(sock, new DNBD3Header(CMDINFO, 0, 0));
-        receiveHeader(sock);
-        Info info = new Persister().read(Info.class, sock.getInputStream());
-        sock.close();
-        return info.getImages();
+        return rcvData().getImages();
     }
 
     public List<Client> getClients() throws Exception {
-        Socket sock = new Socket(HOST, PORT);
-        sendHeader(sock, new DNBD3Header(CMDINFO, 0, 0));
-        receiveHeader(sock);
-        Info info = new Persister().read(Info.class, sock.getInputStream());
-        sock.close();
-        return info.getClients();
+        return rcvData().getClients();
     }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
-    private void sendHeader(Socket sock, DNBD3Header header) throws IOException {
+    private void sndCommand(int cmd) throws IOException, DNBD3Exception {
+        Socket sock = new Socket(HOST, PORT);
+        sndHeader(sock, new DNBD3Header(cmd, 0, 0));
+        rcvHeader(sock);
+        sock.close();
+    }
+    
+    private void sndData(int cmd, Info info) throws Exception {
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+        new Persister().write(info, os);
+        Socket sock = new Socket(HOST, PORT);
+        sndHeader(sock, new DNBD3Header(cmd, os.size(), 0));
+        sock.getOutputStream().write(os.toByteArray());
+        rcvHeader(sock);
+        sock.close();
+    }
+    
+    private Info rcvData() throws Exception {
+        Socket sock = new Socket(HOST, PORT);
+        sndHeader(sock, new DNBD3Header(CMDINFO, 0, 0));
+        rcvHeader(sock);
+        Info info = new Persister().read(Info.class, sock.getInputStream());
+        sock.close();
+        return info;
+    }
+    
+    private void sndHeader(Socket sock, DNBD3Header header) throws IOException {
         OutputStream os = sock.getOutputStream();
         os.write(header.toByteArray());
     }
 
-    private DNBD3Header receiveHeader(Socket sock) throws IOException, DNBD3Exception {
+    private DNBD3Header rcvHeader(Socket sock) throws IOException, DNBD3Exception {
         DNBD3Header header = new DNBD3Header();
         InputStream is = sock.getInputStream();
         byte[] bytes = ByteBuffer.allocate(12).array();
@@ -86,8 +99,8 @@ public class DNBD3Server {
         case 0:
             return header;
 
-        case DNBD3Header.ERROR_IMAGE_NOT_FOUND:
-            throw new DNBD3Exception(DNBD3Header.ERROR_IMAGE_NOT_FOUND,
+        case DNBD3Header.ERROR_FILE_NOT_FOUND:
+            throw new DNBD3Exception(DNBD3Header.ERROR_FILE_NOT_FOUND,
                     "Image file does not exist or is not readable");
 
         case DNBD3Header.ERROR_IMAGE_ALREADY_EXISTS:
@@ -97,6 +110,18 @@ public class DNBD3Server {
         case DNBD3Header.ERROR_CONFIG_FILE_PERMISSIONS:
             throw new DNBD3Exception(DNBD3Header.ERROR_CONFIG_FILE_PERMISSIONS,
                     "Config file is not writable");
+            
+        case DNBD3Header.ERROR_IMAGE_NOT_FOUND:
+            throw new DNBD3Exception(DNBD3Header.ERROR_IMAGE_NOT_FOUND,
+                    "Image does not exist");
+            
+        case DNBD3Header.ERROR_RID:
+            throw new DNBD3Exception(DNBD3Header.ERROR_RID,
+                    "Delete with rid=0 is not allowed");
+            
+        case DNBD3Header.ERROR_IMAGE_IN_USE:
+            throw new DNBD3Exception(DNBD3Header.ERROR_IMAGE_IN_USE,
+                    "Image is in use");
 
         default:
             throw new DNBD3Exception(DNBD3Header.ERROR_UNKNOWN,
-- 
cgit v1.2.3-55-g7522