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From serg...@apache.org
Subject [1/3] cxf git commit: Adding a basic Throttling manager
Date Mon, 01 Feb 2016 15:32:46 GMT
Repository: cxf
Updated Branches:
  refs/heads/3.1.x-fixes 31d9b4548 -> ad577419d


Adding a basic Throttling manager


Project: http://git-wip-us.apache.org/repos/asf/cxf/repo
Commit: http://git-wip-us.apache.org/repos/asf/cxf/commit/8781a1c0
Tree: http://git-wip-us.apache.org/repos/asf/cxf/tree/8781a1c0
Diff: http://git-wip-us.apache.org/repos/asf/cxf/diff/8781a1c0

Branch: refs/heads/3.1.x-fixes
Commit: 8781a1c0cfea708e3915e72b83c50877969774a2
Parents: 31d9b45
Author: Sergey Beryozkin <sberyozkin@gmail.com>
Authored: Mon Feb 1 15:28:35 2016 +0000
Committer: Sergey Beryozkin <sberyozkin@gmail.com>
Committed: Mon Feb 1 15:32:26 2016 +0000

----------------------------------------------------------------------
 .../cxf/throttling/SimpleThrottlingManager.java | 63 ++++++++++++++++++++
 .../cxf/throttling/ThrottlingCounter.java       | 32 ++++++++++
 .../ThrottlingResponseInterceptor.java          |  4 ++
 3 files changed, 99 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/cxf/blob/8781a1c0/rt/features/throttling/src/main/java/org/apache/cxf/throttling/SimpleThrottlingManager.java
----------------------------------------------------------------------
diff --git a/rt/features/throttling/src/main/java/org/apache/cxf/throttling/SimpleThrottlingManager.java
b/rt/features/throttling/src/main/java/org/apache/cxf/throttling/SimpleThrottlingManager.java
new file mode 100644
index 0000000..7fefbe9
--- /dev/null
+++ b/rt/features/throttling/src/main/java/org/apache/cxf/throttling/SimpleThrottlingManager.java
@@ -0,0 +1,63 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.cxf.throttling;
+
+import java.util.Collections;
+import java.util.List;
+
+import org.apache.cxf.message.Message;
+import org.apache.cxf.phase.Phase;
+
+/**
+ * Suspends or aborts the requests if the threshold has been reached
+ */
+public class SimpleThrottlingManager extends ThrottleResponse implements ThrottlingManager
{
+    private static final String THROTTLED_KEY = "THROTTLED";
+        
+    private int threshold;
+    private ThrottlingCounter counter = new ThrottlingCounter();
+    
+    @Override
+    public List<String> getDecisionPhases() {
+        return Collections.singletonList(Phase.PRE_STREAM);
+    }
+
+    @Override
+    public ThrottleResponse getThrottleResponse(String phase, Message m) {
+        if (m.containsKey(THROTTLED_KEY)) {
+            return null;
+        }
+        m.put(ThrottlingCounter.class, counter);
+        if (counter.incrementAndGet() >= threshold) {
+            m.put(THROTTLED_KEY, true);
+            return this;
+        } else {
+            return null;
+        }
+    }
+
+    public int getThreshold() {
+        return threshold;
+    }
+
+    public void setThreshold(int threshold) {
+        this.threshold = threshold;
+    }
+
+}

http://git-wip-us.apache.org/repos/asf/cxf/blob/8781a1c0/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingCounter.java
----------------------------------------------------------------------
diff --git a/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingCounter.java
b/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingCounter.java
new file mode 100644
index 0000000..1901bc6
--- /dev/null
+++ b/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingCounter.java
@@ -0,0 +1,32 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.cxf.throttling;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class ThrottlingCounter {
+    private static final AtomicInteger COUNTER = new AtomicInteger();
+    public int incrementAndGet() {
+        return COUNTER.incrementAndGet();
+    }
+    public int decrementAndGet() {
+        return COUNTER.decrementAndGet();
+    }
+
+}

http://git-wip-us.apache.org/repos/asf/cxf/blob/8781a1c0/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingResponseInterceptor.java
----------------------------------------------------------------------
diff --git a/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingResponseInterceptor.java
b/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingResponseInterceptor.java
index 9992abd..96a862b 100644
--- a/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingResponseInterceptor.java
+++ b/rt/features/throttling/src/main/java/org/apache/cxf/throttling/ThrottlingResponseInterceptor.java
@@ -69,5 +69,9 @@ public class ThrottlingResponseInterceptor extends AbstractPhaseInterceptor<Mess
                 headers.put("Retry-After", Collections.singletonList(retryAfter));
             }
         }
+        ThrottlingCounter tCounter = message.getExchange().get(ThrottlingCounter.class);
+        if (tCounter != null) {
+            tCounter.decrementAndGet();
+        }
     }
 }


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