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From davscl...@apache.org
Subject [1/2] git commit: CAMEL-6447: Fixed CBR not working correctly when being nested. Also fixed endChoice to work better when nested.
Date Fri, 23 Aug 2013 05:44:24 GMT
Updated Branches:
  refs/heads/camel-2.11.x ba58c25cd -> 27a5f833b
  refs/heads/master 922ea959d -> 020c451a7


CAMEL-6447: Fixed CBR not working correctly when being nested. Also fixed endChoice to work
better when nested.


Project: http://git-wip-us.apache.org/repos/asf/camel/repo
Commit: http://git-wip-us.apache.org/repos/asf/camel/commit/020c451a
Tree: http://git-wip-us.apache.org/repos/asf/camel/tree/020c451a
Diff: http://git-wip-us.apache.org/repos/asf/camel/diff/020c451a

Branch: refs/heads/master
Commit: 020c451a794e8b9d0ed35cbd3ffbcfae4c53485f
Parents: 922ea95
Author: Claus Ibsen <davsclaus@apache.org>
Authored: Thu Aug 22 21:40:41 2013 +0200
Committer: Claus Ibsen <davsclaus@apache.org>
Committed: Thu Aug 22 22:31:07 2013 +0200

----------------------------------------------------------------------
 .../apache/camel/model/ProcessorDefinition.java |   7 +-
 .../apache/camel/processor/ChoiceProcessor.java | 123 +++++++------------
 .../camel/processor/NestedChoiceIssueTest.java  |  74 +++++++++++
 .../processor/TripleNestedChoiceIssueTest.java  |  93 ++++++++++++++
 .../async/AsyncNestedTripleChoiceIssueTest.java |  97 +++++++++++++++
 .../processor/SpringNestedChoiceIssueTest.java  |  32 +++++
 .../processor/SpringNestedChoiceIssueTest.xml   |  48 ++++++++
 7 files changed, 394 insertions(+), 80 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/camel/blob/020c451a/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
----------------------------------------------------------------------
diff --git a/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java b/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
index 45889c3..9998e51 100644
--- a/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
+++ b/camel-core/src/main/java/org/apache/camel/model/ProcessorDefinition.java
@@ -1295,8 +1295,13 @@ public abstract class ProcessorDefinition<Type extends ProcessorDefinition<Type>
      * @return the builder
      */
     public ChoiceDefinition endChoice() {
-        // are we already a choice?
+        // are we nested choice?
         ProcessorDefinition<?> def = this;
+        if (def.getParent() instanceof WhenDefinition) {
+            return (ChoiceDefinition) def.getParent().getParent();
+        }
+
+        // are we already a choice?
         if (def instanceof ChoiceDefinition) {
             return (ChoiceDefinition) def;
         }

http://git-wip-us.apache.org/repos/asf/camel/blob/020c451a/camel-core/src/main/java/org/apache/camel/processor/ChoiceProcessor.java
----------------------------------------------------------------------
diff --git a/camel-core/src/main/java/org/apache/camel/processor/ChoiceProcessor.java b/camel-core/src/main/java/org/apache/camel/processor/ChoiceProcessor.java
index 5af8b36..0310c9a 100644
--- a/camel-core/src/main/java/org/apache/camel/processor/ChoiceProcessor.java
+++ b/camel-core/src/main/java/org/apache/camel/processor/ChoiceProcessor.java
@@ -30,10 +30,6 @@ import org.apache.camel.support.ServiceSupport;
 import org.apache.camel.util.AsyncProcessorConverterHelper;
 import org.apache.camel.util.AsyncProcessorHelper;
 import org.apache.camel.util.ServiceHelper;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import static org.apache.camel.processor.PipelineHelper.continueProcessing;
 
 /**
  * Implements a Choice structure where one or more predicates are used which if
@@ -43,7 +39,6 @@ import static org.apache.camel.processor.PipelineHelper.continueProcessing;
  * @version 
  */
 public class ChoiceProcessor extends ServiceSupport implements AsyncProcessor, Navigate<Processor>,
Traceable {
-    private static final Logger LOG = LoggerFactory.getLogger(ChoiceProcessor.class);
     private final List<Processor> filters;
     private final Processor otherwise;
 
@@ -56,91 +51,61 @@ public class ChoiceProcessor extends ServiceSupport implements AsyncProcessor,
N
         AsyncProcessorHelper.process(this, exchange);
     }
 
-    public boolean process(Exchange exchange, AsyncCallback callback) {
+    public boolean process(final Exchange exchange, final AsyncCallback callback) {
         Iterator<Processor> processors = next().iterator();
 
-        exchange.setProperty(Exchange.FILTER_MATCHED, false);
-        while (continueRouting(processors, exchange)) {
+        // callback to restore existing FILTER_MATCHED property on the Exchange
+        final Object existing = exchange.getProperty(Exchange.FILTER_MATCHED);
+        final AsyncCallback choiceCallback = new AsyncCallback() {
+            @Override
+            public void done(boolean doneSync) {
+                if (existing != null) {
+                    exchange.setProperty(Exchange.FILTER_MATCHED, existing);
+                } else {
+                    exchange.removeProperty(Exchange.FILTER_MATCHED);
+                }
+                callback.done(doneSync);
+            }
+        };
+
+        // as we only pick one processor to process, then no need to have async callback
that has a while loop as well
+        // as this should not happen, eg we pick the first filter processor that matches,
or the otherwise (if present)
+        // and if not, we just continue without using any processor
+        while (processors.hasNext()) {
             // get the next processor
             Processor processor = processors.next();
 
-            AsyncProcessor async = AsyncProcessorConverterHelper.convert(processor);
-            boolean sync = process(exchange, callback, processors, async);
-
-            // continue as long its being processed synchronously
-            if (!sync) {
-                LOG.trace("Processing exchangeId: {} is continued being processed asynchronously",
exchange.getExchangeId());
-                // the remainder of the CBR will be completed async
-                // so we break out now, then the callback will be invoked which then continue
routing from where we left here
-                return false;
+            // evaluate the predicate on filter predicate early to be faster
+            // and avoid issues when having nested choices
+            // as we should only pick one processor
+            boolean matches = true;
+            if (processor instanceof FilterProcessor) {
+                FilterProcessor filter = (FilterProcessor) processor;
+                try {
+                    matches = filter.getPredicate().matches(exchange);
+                    exchange.setProperty(Exchange.FILTER_MATCHED, matches);
+                } catch (Throwable e) {
+                    exchange.setException(e);
+                    choiceCallback.done(true);
+                    return true;
+                }
+                // as we have pre evaluated the predicate then use its processor directly
when routing
+                processor = filter.getProcessor();
             }
 
-            LOG.trace("Processing exchangeId: {} is continued being processed synchronously",
exchange.getExchangeId());
-
-            // check for error if so we should break out
-            if (!continueProcessing(exchange, "so breaking out of content based router",
LOG)) {
-                break;
+            // if we did not match then continue to next filter
+            if (!matches) {
+                continue;
             }
-        }
-
-        LOG.trace("Processing complete for exchangeId: {} >>> {}", exchange.getExchangeId(),
exchange);
 
-        callback.done(true);
-        return true;
-    }
-
-    protected boolean continueRouting(Iterator<Processor> it, Exchange exchange) {
-        boolean answer = it.hasNext();
-        if (answer) {
-            Object matched = exchange.getProperty(Exchange.FILTER_MATCHED);
-            if (matched != null) {
-                boolean hasMatched = exchange.getContext().getTypeConverter().convertTo(Boolean.class,
matched);
-                if (hasMatched) {
-                    LOG.debug("ExchangeId: {} has been matched: {}", exchange.getExchangeId(),
exchange);
-                    answer = false;
-                }
-            }
+            // okay we found a filter or its the otherwise we are processing
+            AsyncProcessor async = AsyncProcessorConverterHelper.convert(processor);
+            return async.process(exchange, choiceCallback);
         }
-        LOG.trace("ExchangeId: {} should continue matching: {}", exchange.getExchangeId(),
answer);
-        return answer;
-    }
-
-    private boolean process(final Exchange exchange, final AsyncCallback callback,
-                            final Iterator<Processor> processors, final AsyncProcessor
asyncProcessor) {
-        // this does the actual processing so log at trace level
-        LOG.trace("Processing exchangeId: {} >>> {}", exchange.getExchangeId(),
exchange);
-
-        // implement asynchronous routing logic in callback so we can have the callback being
-        // triggered and then continue routing where we left
-        boolean sync = asyncProcessor.process(exchange, new AsyncCallback() {
-            public void done(boolean doneSync) {
-                // we only have to handle async completion of the pipeline
-                if (doneSync) {
-                    return;
-                }
 
-                // continue processing the pipeline asynchronously
-                while (continueRouting(processors, exchange)) {
-                    AsyncProcessor processor = AsyncProcessorConverterHelper.convert(processors.next());
-
-                    // check for error if so we should break out
-                    if (!continueProcessing(exchange, "so breaking out of pipeline", LOG))
{
-                        break;
-                    }
-
-                    doneSync = process(exchange, callback, processors, processor);
-                    if (!doneSync) {
-                        LOG.trace("Processing exchangeId: {} is continued being processed
asynchronously", exchange.getExchangeId());
-                        return;
-                    }
-                }
-
-                LOG.trace("Processing complete for exchangeId: {} >>> {}", exchange.getExchangeId(),
exchange);
-                callback.done(false);
-            }
-        });
-
-        return sync;
+        // when no filter matches and there is no otherwise, then just continue
+        choiceCallback.done(true);
+        return true;
     }
 
     @Override

http://git-wip-us.apache.org/repos/asf/camel/blob/020c451a/camel-core/src/test/java/org/apache/camel/processor/NestedChoiceIssueTest.java
----------------------------------------------------------------------
diff --git a/camel-core/src/test/java/org/apache/camel/processor/NestedChoiceIssueTest.java
b/camel-core/src/test/java/org/apache/camel/processor/NestedChoiceIssueTest.java
new file mode 100644
index 0000000..bb74f3c
--- /dev/null
+++ b/camel-core/src/test/java/org/apache/camel/processor/NestedChoiceIssueTest.java
@@ -0,0 +1,74 @@
+/**
+ * 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.camel.processor;
+
+import org.apache.camel.ContextTestSupport;
+import org.apache.camel.builder.RouteBuilder;
+
+public class NestedChoiceIssueTest extends ContextTestSupport {
+
+    public void testNestedChoiceBig() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(1);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 10);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceMed() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(1);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 4);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceLow() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(1);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 1);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    @Override
+    protected RouteBuilder createRouteBuilder() throws Exception {
+        return new RouteBuilder() {
+            @Override
+            public void configure() throws Exception {
+                from("direct:start")
+                    .choice()
+                        .when(header("foo").isGreaterThan(1))
+                            .choice()
+                                .when(header("foo").isGreaterThan(5))
+                                    .to("mock:big")
+                                .otherwise()
+                                    .to("mock:med")
+                            .endChoice()
+                        .otherwise()
+                            .to("mock:low")
+                    .end();
+            }
+        };
+    }
+}

http://git-wip-us.apache.org/repos/asf/camel/blob/020c451a/camel-core/src/test/java/org/apache/camel/processor/TripleNestedChoiceIssueTest.java
----------------------------------------------------------------------
diff --git a/camel-core/src/test/java/org/apache/camel/processor/TripleNestedChoiceIssueTest.java
b/camel-core/src/test/java/org/apache/camel/processor/TripleNestedChoiceIssueTest.java
new file mode 100644
index 0000000..713deda
--- /dev/null
+++ b/camel-core/src/test/java/org/apache/camel/processor/TripleNestedChoiceIssueTest.java
@@ -0,0 +1,93 @@
+/**
+ * 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.camel.processor;
+
+import org.apache.camel.ContextTestSupport;
+import org.apache.camel.builder.RouteBuilder;
+
+public class TripleNestedChoiceIssueTest extends ContextTestSupport {
+
+    public void testNestedChoiceVeryBig() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+        getMockEndpoint("mock:verybig").expectedMessageCount(1);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 20);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceBig() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(1);
+        getMockEndpoint("mock:verybig").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 10);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceMed() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(1);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+        getMockEndpoint("mock:verybig").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 4);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceLow() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(1);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+        getMockEndpoint("mock:verybig").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 1);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    @Override
+    protected RouteBuilder createRouteBuilder() throws Exception {
+        return new RouteBuilder() {
+            @Override
+            public void configure() throws Exception {
+                from("direct:start")
+                    .choice()
+                        .when(header("foo").isGreaterThan(1))
+                            .choice()
+                                .when(header("foo").isGreaterThan(5))
+                                    .choice()
+                                        .when(header("foo").isGreaterThan(10))
+                                            .to("mock:verybig")
+                                        .otherwise()
+                                            .to("mock:big")
+                                    .endChoice()
+                                .otherwise()
+                                    .to("mock:med")
+                            .endChoice()
+                        .otherwise()
+                            .to("mock:low")
+                    .end();
+            }
+        };
+    }
+}

http://git-wip-us.apache.org/repos/asf/camel/blob/020c451a/camel-core/src/test/java/org/apache/camel/processor/async/AsyncNestedTripleChoiceIssueTest.java
----------------------------------------------------------------------
diff --git a/camel-core/src/test/java/org/apache/camel/processor/async/AsyncNestedTripleChoiceIssueTest.java
b/camel-core/src/test/java/org/apache/camel/processor/async/AsyncNestedTripleChoiceIssueTest.java
new file mode 100644
index 0000000..2cc0561
--- /dev/null
+++ b/camel-core/src/test/java/org/apache/camel/processor/async/AsyncNestedTripleChoiceIssueTest.java
@@ -0,0 +1,97 @@
+/**
+ * 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.camel.processor.async;
+
+import org.apache.camel.ContextTestSupport;
+import org.apache.camel.builder.RouteBuilder;
+
+public class AsyncNestedTripleChoiceIssueTest extends ContextTestSupport {
+
+    public void testNestedChoiceVeryBig() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+        getMockEndpoint("mock:verybig").expectedMessageCount(1);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 10);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceBig() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(1);
+        getMockEndpoint("mock:verybig").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 7);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceMed() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(0);
+        getMockEndpoint("mock:med").expectedMessageCount(1);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+        getMockEndpoint("mock:verybig").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 4);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    public void testNestedChoiceLow() throws Exception {
+        getMockEndpoint("mock:low").expectedMessageCount(1);
+        getMockEndpoint("mock:med").expectedMessageCount(0);
+        getMockEndpoint("mock:big").expectedMessageCount(0);
+        getMockEndpoint("mock:verybig").expectedMessageCount(0);
+
+        template.sendBodyAndHeader("direct:start", "Hello World", "foo", 1);
+
+        assertMockEndpointsSatisfied();
+    }
+
+    @Override
+    protected RouteBuilder createRouteBuilder() throws Exception {
+        return new RouteBuilder() {
+            @Override
+            public void configure() throws Exception {
+                context.addComponent("async", new MyAsyncComponent());
+
+                from("direct:start")
+                    .choice()
+                        .when(header("foo").isGreaterThan(1))
+                            .to("async:bye:camel")
+                            .choice()
+                                .when(header("foo").isGreaterThan(5))
+                                    .to("async:bye:camel2")
+                                    .choice()
+                                        .when(header("foo").isGreaterThan(7))
+                                            .to("mock:verybig")
+                                        .otherwise()
+                                            .to("mock:big")
+                                    .endChoice()
+                                .otherwise()
+                                    .to("mock:med")
+                            .endChoice()
+                        .otherwise()
+                            .to("mock:low")
+                    .end();
+            }
+        };
+    }
+}

http://git-wip-us.apache.org/repos/asf/camel/blob/020c451a/components/camel-spring/src/test/java/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.java
----------------------------------------------------------------------
diff --git a/components/camel-spring/src/test/java/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.java
b/components/camel-spring/src/test/java/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.java
new file mode 100644
index 0000000..2a471ff
--- /dev/null
+++ b/components/camel-spring/src/test/java/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.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.camel.spring.processor;
+
+import org.apache.camel.CamelContext;
+import org.apache.camel.processor.NestedChoiceIssueTest;
+
+import static org.apache.camel.spring.processor.SpringTestHelper.createSpringCamelContext;
+
+/**
+ * @version 
+ */
+public class SpringNestedChoiceIssueTest extends NestedChoiceIssueTest {
+
+    protected CamelContext createCamelContext() throws Exception {
+        return createSpringCamelContext(this, "org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.xml");
+    }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/camel/blob/020c451a/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.xml
----------------------------------------------------------------------
diff --git a/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.xml
b/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.xml
new file mode 100644
index 0000000..ea9c7a3
--- /dev/null
+++ b/components/camel-spring/src/test/resources/org/apache/camel/spring/processor/SpringNestedChoiceIssueTest.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    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.
+-->
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="
+       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+       http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd
+    ">
+
+  <camelContext xmlns="http://camel.apache.org/schema/spring">
+    <route>
+      <from uri="direct:start"/>
+      <choice>
+        <when>
+          <simple>${header.foo} > 1</simple>
+          <choice>
+            <when>
+              <simple>${header.foo} > 5</simple>
+              <to uri="mock:big"/>
+            </when>
+            <otherwise>
+              <to uri="mock:med"/>
+            </otherwise>
+          </choice>
+        </when>
+        <otherwise>
+          <to uri="mock:low"/>
+        </otherwise>
+      </choice>
+    </route>
+  </camelContext>
+
+</beans>


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