[FAB-5341] Solo should respect batchtimeout reconf

Solo currently only reads the batch timeout at startup.  This is a
problem, because the batch timeout may be changed dynamically through a
reconfiguration transaction.

This CR simply causes solo to re-query the batch timeout from the config
each time the timer is initialized, rather than once at creation time.

Change-Id: I493fa4edddef40821336aa610ab242a3ffe97d26
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

orderer/solo/consensus.go

@@ -29,10 +29,9 @@ var logger = logging.MustGetLogger("orderer/solo")
 type consenter struct{}
 
 type chain struct {
-	support      multichain.ConsenterSupport
-	batchTimeout time.Duration
-	sendChan     chan *cb.Envelope
-	exitChan     chan struct{}
+	support  multichain.ConsenterSupport
+	sendChan chan *cb.Envelope
+	exitChan chan struct{}
 }
 
 // New creates a new consenter for the solo consensus scheme.
@@ -49,10 +48,9 @@ func (solo *consenter) HandleChain(support multichain.ConsenterSupport, metadata
 
 func newChain(support multichain.ConsenterSupport) *chain {
 	return &chain{
-		batchTimeout: support.SharedConfig().BatchTimeout(),
-		support:      support,
-		sendChan:     make(chan *cb.Envelope),
-		exitChan:     make(chan struct{}),
+		support:  support,
+		sendChan: make(chan *cb.Envelope),
+		exitChan: make(chan struct{}),
 	}
 }
 
@@ -92,7 +90,7 @@ func (ch *chain) main() {
 		case msg := <-ch.sendChan:
 			batches, committers, ok := ch.support.BlockCutter().Ordered(msg)
 			if ok && len(batches) == 0 && timer == nil {
-				timer = time.After(ch.batchTimeout)
+				timer = time.After(ch.support.SharedConfig().BatchTimeout())
 				continue
 			}
 			for i, batch := range batches {

orderer/solo/consensus_test.go

@@ -143,6 +143,14 @@ func TestBatchTimer(t *testing.T) {
 		t.Fatalf("Did not create the second batch, indicating that the timer was not appopriately reset")
 	}
 
+	support.SharedConfigVal.BatchTimeoutVal, _ = time.ParseDuration("10s")
+	syncQueueMessage(testMessage, bs, support.BlockCutterVal)
+	select {
+	case <-support.Blocks:
+		t.Fatalf("Created another batch, indicating that the timer was not appopriately re-read")
+	case <-time.After(100 * time.Millisecond):
+	}
+
 	bs.Halt()
 	select {
 	case <-support.Blocks:
@@ -175,7 +183,7 @@ func TestBatchTimerHaltOnFilledBatch(t *testing.T) {
 	}
 
 	// Change the batch timeout to be near instant, if the timer was not reset, it will still be waiting an hour
-	bs.batchTimeout = time.Millisecond
+	support.SharedConfigVal.BatchTimeoutVal = time.Millisecond
 
 	support.BlockCutterVal.CutNext = false
 	syncQueueMessage(testMessage, bs, support.BlockCutterVal)