From fbc287bd02a6bb91b709b798abfb859d8223fc43 Mon Sep 17 00:00:00 2001
From: Robert Godfrey <rgodfrey@apache.org>
Date: Tue, 23 Sep 2014 13:00:05 +0000
Subject: QPID-3678 : [Java Client] Add support for setting link capacity to
 zero in ADDR addresses

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1626995 13f79535-47bb-0310-9956-ffa450edef68
---
 .../qpid/client/BasicMessageConsumer_0_10.java     | 75 +++++++++++++++++++++-
 .../client/messaging/address/AddressHelper.java    | 21 +++---
 .../apache/qpid/client/messaging/address/Link.java |  4 +-
 3 files changed, 83 insertions(+), 17 deletions(-)

(limited to 'qpid/java/client')

diff --git a/qpid/java/client/src/main/java/org/apache/qpid/client/BasicMessageConsumer_0_10.java b/qpid/java/client/src/main/java/org/apache/qpid/client/BasicMessageConsumer_0_10.java
index 8f91a7db08..e0d8ac3702 100644
--- a/qpid/java/client/src/main/java/org/apache/qpid/client/BasicMessageConsumer_0_10.java
+++ b/qpid/java/client/src/main/java/org/apache/qpid/client/BasicMessageConsumer_0_10.java
@@ -389,7 +389,7 @@ public class BasicMessageConsumer_0_10 extends BasicMessageConsumer<UnprocessedM
         {
             _syncReceive.set(true);
         }
-        if (_0_10session.isStarted() && _capacity == 0 && getSynchronousQueue().isEmpty())
+        if (_0_10session.isStarted() && isMessageListenerSet() && _capacity == 0 && getSynchronousQueue().isEmpty())
         {
             messageFlow();
         }
@@ -536,7 +536,7 @@ public class BasicMessageConsumer_0_10 extends BasicMessageConsumer<UnprocessedM
     private long evaluateCapacity(AMQDestination destination)
     {
         long capacity = 0;
-        if (destination.getLink() != null && destination.getLink().getConsumerCapacity() > 0)
+        if (destination.getLink() != null && destination.getLink().getConsumerCapacity() >= 0)
         {
             capacity = destination.getLink().getConsumerCapacity();
         }
@@ -547,4 +547,75 @@ public class BasicMessageConsumer_0_10 extends BasicMessageConsumer<UnprocessedM
         return capacity;
     }
 
+    @Override
+    public Message receive(final long l) throws JMSException
+    {
+        long capacity = getCapacity();
+        try
+        {
+            AMQSession_0_10 session = (AMQSession_0_10) getSession();
+
+            if (capacity == 0 && getMessageListener() == null)
+            {
+                session.getQpidSession().messageFlow(getConsumerTagString(),
+                                                     MessageCreditUnit.MESSAGE, 1,
+                                                     Option.UNRELIABLE);
+
+                session.sync();
+
+            }
+
+            Message message = super.receive(l);
+
+            if (message == null && capacity == 0 && getMessageListener() == null)
+            {
+                session.getQpidSession().messageFlow(getConsumerTagString(),
+                                                     MessageCreditUnit.MESSAGE, 0,
+                                                     Option.UNRELIABLE);
+                session.sync();
+
+                message = super.receiveNoWait();
+            }
+            return message;
+        }
+        catch (AMQException e)
+        {
+            throw new JMSAMQException(e);
+        }
+    }
+
+    @Override
+    public Message receiveNoWait() throws JMSException
+    {
+        long capacity = getCapacity();
+        try
+        {
+            AMQSession_0_10 session = (AMQSession_0_10) getSession();
+
+            if (capacity == 0 && getMessageListener() == null)
+            {
+                session.getQpidSession().messageFlow(getConsumerTagString(),
+                                                     MessageCreditUnit.MESSAGE, 1,
+                                                     Option.UNRELIABLE);
+
+                session.sync();
+            }
+            Message message = super.receiveNoWait();
+            if (message == null && capacity == 0 && getMessageListener() == null)
+            {
+                session.getQpidSession().messageFlow(getConsumerTagString(),
+                                                     MessageCreditUnit.MESSAGE, 0,
+                                                     Option.UNRELIABLE);
+                session.sync();
+
+                message = super.receiveNoWait();
+            }
+            return message;
+        }
+        catch (AMQException e)
+        {
+            throw new JMSAMQException(e);
+        }
+
+    }
 }
diff --git a/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/AddressHelper.java b/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/AddressHelper.java
index 116fd11942..81ccaee1f3 100644
--- a/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/AddressHelper.java
+++ b/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/AddressHelper.java
@@ -242,22 +242,17 @@ public class AddressHelper
             
             if (((Map) _address.getOptions().get(LINK)).get(CAPACITY) instanceof Map)
             {
-                MapAccessor capacityProps = new MapAccessor(
-                        (Map) ((Map) _address.getOptions().get(LINK))
-                                .get(CAPACITY));
-                link
-                        .setConsumerCapacity(capacityProps
-                                .getInt(CAPACITY_SOURCE) == null ? 0
-                                : capacityProps.getInt(CAPACITY_SOURCE));
-                link
-                        .setProducerCapacity(capacityProps
-                                .getInt(CAPACITY_TARGET) == null ? 0
-                                : capacityProps.getInt(CAPACITY_TARGET));
+                MapAccessor capacityProps = new MapAccessor((Map) ((Map) _address.getOptions().get(LINK)).get(CAPACITY));
+
+                Integer sourceCapacity = capacityProps.getInt(CAPACITY_SOURCE);
+                link.setConsumerCapacity(sourceCapacity == null ? -1 : sourceCapacity);
+
+                Integer targetCapacity = capacityProps.getInt(CAPACITY_TARGET);
+                link.setProducerCapacity(targetCapacity == null ? -1 : targetCapacity);
             } 
             else
             {
-                int cap = _linkPropAccess.getInt(CAPACITY) == null ? 0 : _linkPropAccess
-                        .getInt(CAPACITY);
+                int cap = _linkPropAccess.getInt(CAPACITY) == null ? -1 : _linkPropAccess.getInt(CAPACITY);
                 link.setConsumerCapacity(cap);
                 link.setProducerCapacity(cap);
             }
diff --git a/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/Link.java b/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/Link.java
index 7e9cb3072a..b40abf3f98 100644
--- a/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/Link.java
+++ b/qpid/java/client/src/main/java/org/apache/qpid/client/messaging/address/Link.java
@@ -38,8 +38,8 @@ public class Link
     private FilterType _filterType = FilterType.SUBJECT;
     private boolean _isNoLocal;
     private boolean _isDurable;
-    private int _consumerCapacity = 0;
-    private int _producerCapacity = 0;
+    private int _consumerCapacity = -1;
+    private int _producerCapacity = -1;
     private Subscription subscription;
     private Reliability reliability = Reliability.AT_LEAST_ONCE;
     private List<Binding> _bindings = Collections.emptyList();
-- 
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