Ethereum Listener

+ added callback for db preloaded blocks

ethereumj-core/src/main/java/org/ethereum/db/Repository.java

@@ -7,6 +7,8 @@ import org.ethereum.core.Blockchain;
 import org.ethereum.core.Genesis;
 import org.ethereum.crypto.HashUtil;
 import org.ethereum.json.JSONHelper;
+import org.ethereum.listener.EthereumListener;
+import org.ethereum.manager.WorldManager;
 import org.ethereum.trie.TrackTrie;
 import org.ethereum.trie.Trie;
 import org.ethereum.util.ByteUtil;
@@ -127,6 +129,12 @@ public class Repository {
             		this.addBalance   (Hex.decode(address), Genesis.getPremineAmount());
 				}
                 blockchain.storeBlock(Genesis.getInstance());
+
+                EthereumListener listener =  WorldManager.getInstance().getListener();
+                if (listener != null){
+                    listener.onPreloadedBlock(Genesis.getInstance());
+                }
+
                	logger.debug("Block #{} -> {}", Genesis.NUMBER, blockchain.getLastBlock().toFlatString());
                	dumpState(0, 0, null);
             } else {
@@ -136,6 +144,11 @@ public class Repository {
             		Block block = new Block(iterator.next().getValue());
             		blockchain.getBlockCache().put(block.getNumber(), block.getHash());
             		blockchain.setLastBlock(block);
+
+                    EthereumListener listener =  WorldManager.getInstance().getListener();
+                    if (listener != null){
+                        listener.onPreloadedBlock(block);
+                    }
     	            logger.debug("Block #{} -> {}", block.getNumber(), block.toFlatString());
             	}
 				logger.info(

ethereumj-core/src/main/java/org/ethereum/facade/Ethereum.java

@@ -24,9 +24,10 @@ public interface Ethereum {
     public void connect(String ip, int port);
 
     public Block getBlockByIndex(long index);
-
     public long getBlockChainSize();
 
     public void addListener(EthereumListener listener);
 
+    public void loadBlockChain();
+
 }

ethereumj-core/src/main/java/org/ethereum/facade/EthereumImpl.java

@@ -23,7 +23,7 @@ public class EthereumImpl implements Ethereum {
     private Logger logger = LoggerFactory.getLogger("facade");
 
     public EthereumImpl() {
-        WorldManager.getInstance().loadBlockchain();
+
     }
 
     /**
@@ -112,4 +112,9 @@ public class EthereumImpl implements Ethereum {
         }
     }
 
+
+    @Override
+    public void loadBlockChain() {
+        WorldManager.getInstance().loadBlockchain();
+    }
 }

ethereumj-core/src/main/java/org/ethereum/listener/EthereumListener.java

@@ -14,6 +14,7 @@ public interface EthereumListener {
 
     public void trace(String output);
     public void onBlock(Block block);
+    public void onPreloadedBlock(Block block);
     public void onRecvMessage(Message message);
     public void onSendMessage(Message message);
     public void onPeerDisconnect(String host, long port);

ethereumj-core/src/main/java/org/ethereum/listener/EthereumListenerAdapter.java

@@ -22,6 +22,11 @@ public class EthereumListenerAdapter implements EthereumListener {
 
     }
 
+    @Override
+    public void onPreloadedBlock(Block block) {
+
+    }
+
     @Override
     public void onRecvMessage(Message message) {