Connections are now severed after a configurable time (12h by default) or when a limit is exceeded (150 by default)

domain/src/main/java/ch/dissem/bitmessage/BitmessageContext.java

@@ -40,6 +40,7 @@ import static ch.dissem.bitmessage.entity.Plaintext.Status.*;
 import static ch.dissem.bitmessage.entity.Plaintext.Type.BROADCAST;
 import static ch.dissem.bitmessage.entity.Plaintext.Type.MSG;
 import static ch.dissem.bitmessage.utils.UnixTime.DAY;
+import static ch.dissem.bitmessage.utils.UnixTime.HOUR;
 
 /**
  * <p>Use this class if you want to create a Bitmessage client.</p>
@@ -295,6 +296,8 @@ public class BitmessageContext {
         Security security;
         MessageCallback messageCallback;
         Listener listener;
+        int connectionLimit = 150;
+        long connectionTTL = 12 * HOUR;
 
         public Builder() {
         }
@@ -349,6 +352,16 @@ public class BitmessageContext {
             return this;
         }
 
+        public Builder connectionLimit(int connectionLimit) {
+            this.connectionLimit = connectionLimit;
+            return this;
+        }
+
+        public Builder connectionTTL(int hours) {
+            this.connectionTTL = hours * HOUR;
+            return this;
+        }
+
         public BitmessageContext build() {
             nonNull("inventory", inventory);
             nonNull("nodeRegistry", nodeRegistry);

domain/src/main/java/ch/dissem/bitmessage/InternalContext.java

@@ -56,6 +56,8 @@ public class InternalContext {
     private final long clientNonce;
     private final long networkNonceTrialsPerByte = 1000;
     private final long networkExtraBytes = 1000;
+    private long connectionTTL;
+    private int connectionLimit;
 
     public InternalContext(BitmessageContext.Builder builder) {
         this.security = builder.security;
@@ -68,6 +70,8 @@ public class InternalContext {
         this.clientNonce = security.randomNonce();
         this.messageCallback = builder.messageCallback;
         this.port = builder.port;
+        this.connectionLimit = builder.connectionLimit;
+        this.connectionTTL = builder.connectionTTL;
 
         Singleton.initialize(security);
 
@@ -166,7 +170,7 @@ public class InternalContext {
                     .payload(payload)
                     .build();
             if (object.isSigned()) {
-                object.sign( from.getPrivateKey());
+                object.sign(from.getPrivateKey());
             }
             if (payload instanceof Broadcast) {
                 ((Broadcast) payload).encrypt();
@@ -232,6 +236,14 @@ public class InternalContext {
         return clientNonce;
     }
 
+    public long getConnectionTTL() {
+        return connectionTTL;
+    }
+
+    public int getConnectionLimit() {
+        return connectionLimit;
+    }
+
     public interface ContextHolder {
         void setContext(InternalContext context);
     }

domain/src/main/java/ch/dissem/bitmessage/utils/Singleton.java

@@ -25,7 +25,11 @@ public class Singleton {
     private static Security security;
 
     public static void initialize(Security security) {
-        Singleton.security = security;
+        synchronized (Singleton.class) {
+            if (Singleton.security == null) {
+                Singleton.security = security;
+            }
+        }
     }
 
     public static Security security() {