FABJ-429 Provide current disconnect handler on peer

Change-Id: Iedf594ff0f40f9be87e5ffd088ea75ec705ed7fe
Signed-off-by: rickr <cr22rc@gmail.com>

Author: cr22rc

src/main/java/org/hyperledger/fabric/sdk/Peer.java

@@ -568,6 +568,16 @@ public synchronized void disconnected(final PeerEventingServiceDisconnectEvent e
         };
     }
 
+    /**
+     * Get current disconnect handler service
+     *
+     * @return The current disconnect handler service.
+     */
+
+    public PeerEventingServiceDisconnected getPeerEventingServiceDisconnected() {
+        return disconnectedHandler;
+    }
+
     /**
      * Set class to handle peer eventing service  disconnects
      *

src/test/java/org/hyperledger/fabric/sdk/PeerTest.java

@@ -20,6 +20,7 @@
 import org.hyperledger.fabric.protos.peer.FabricProposalResponse;
 import org.hyperledger.fabric.sdk.exception.InvalidArgumentException;
 import org.hyperledger.fabric.sdk.exception.PeerException;
+import org.hyperledger.fabric.sdk.testutils.TestUtils;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Rule;
@@ -91,4 +92,26 @@ public void testDuplicateChannel() throws InvalidArgumentException {
         peer.setChannel(duplicate);
         peer.setChannel(duplicate);
     }
+
+    @Test
+    public void getPeerEventingServiceDisconnectedTest() throws InvalidArgumentException {
+        Peer somePeer = hfclient.newPeer("somePeer", "grpc://localhost:4");
+
+        final Peer.PeerEventingServiceDisconnected disconnectedHandlerExpect = (Peer.PeerEventingServiceDisconnected) TestUtils.getField(somePeer, "disconnectedHandler");
+
+        Peer.PeerEventingServiceDisconnected disconnectedHandler = somePeer.getPeerEventingServiceDisconnected();
+
+        Assert.assertSame(disconnectedHandlerExpect, disconnectedHandler);
+
+        Peer.PeerEventingServiceDisconnected peerEventingServiceDisconnectedCurrent = somePeer.setPeerEventingServiceDisconnected(null);
+
+        Assert.assertSame(disconnectedHandlerExpect, peerEventingServiceDisconnectedCurrent);
+
+        Assert.assertNull(somePeer.getPeerEventingServiceDisconnected());
+
+        Assert.assertNull(somePeer.setPeerEventingServiceDisconnected(disconnectedHandlerExpect));
+
+        Assert.assertSame(disconnectedHandlerExpect, somePeer.getPeerEventingServiceDisconnected());
+
+    }
 }