sijie closed pull request #2137: Added more Java and Python examples and made 
the examples match across languages
URL: https://github.com/apache/incubator-pulsar/pull/2137
 
 
   

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diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/UserConfigFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ConfigBasedAppendFunction.java
similarity index 68%
rename from 
pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/UserConfigFunction.java
rename to 
pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ConfigBasedAppendFunction.java
index fb3ceb01c7..1edd943c1f 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/UserConfigFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ConfigBasedAppendFunction.java
@@ -20,24 +20,22 @@
 
 import org.apache.pulsar.functions.api.Context;
 import org.apache.pulsar.functions.api.Function;
-import org.slf4j.Logger;
 
 import java.util.Optional;
 
-public class UserConfigFunction implements Function<String, Void> {
+/**
+ * Function that appends something to incoming input based on config supplied
+ */
+public class ConfigBasedAppendFunction implements Function<String, String> {
     @Override
-    public Void process(String input, Context context) {
+    public String process(String input, Context context) {
         String key = "config-key";
-        Optional<Object> maybeValue = context.getUserConfigValue(key);
-        Logger LOG = context.getLogger();
+        Optional<Object> appendValue = context.getUserConfigValue(key);
 
-        if (maybeValue.isPresent()) {
-            String value = (String) maybeValue.get();
-            LOG.info("The config value is {}", value);
+        if (appendValue.isPresent()) {
+            return input + (String) appendValue.get();
         } else {
-            LOG.error("No value present for the key {}", key);
+            return input + "!";
         }
-
-        return null;
     }
 }
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/CustomObjectFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/CustomObjectFunction.java
new file mode 100644
index 0000000000..d2db0a69b8
--- /dev/null
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/CustomObjectFunction.java
@@ -0,0 +1,34 @@
+/**
+ * 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.pulsar.functions.api.examples;
+
+import org.apache.pulsar.functions.api.Context;
+import org.apache.pulsar.functions.api.Function;
+import org.apache.pulsar.functions.api.examples.serde.CustomObject;
+
+/**
+ * Function that deals with custom objects
+ */
+public class CustomObjectFunction implements Function<CustomObject, 
CustomObject> {
+
+    @Override
+    public CustomObject process(CustomObject input, Context context) {
+        return new CustomObject(input.getValue() + 100);
+    }
+}
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ExclamationFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ExclamationFunction.java
index 097c12b5b7..7d4d2ec79a 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ExclamationFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/ExclamationFunction.java
@@ -21,6 +21,10 @@
 import org.apache.pulsar.functions.api.Context;
 import org.apache.pulsar.functions.api.Function;
 
+/**
+ * The classic Exclamation Function that appends an exclamation at the end
+ * of the input
+ */
 public class ExclamationFunction implements Function<String, String> {
     @Override
     public String process(String input, Context context) {
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/LoggingFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/LoggingFunction.java
index e8e12aea73..4b73678db3 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/LoggingFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/LoggingFunction.java
@@ -18,28 +18,20 @@
  */
 package org.apache.pulsar.functions.api.examples;
 
-import java.util.concurrent.atomic.AtomicInteger;
-
 import org.apache.pulsar.functions.api.Context;
 import org.apache.pulsar.functions.api.Function;
-import org.slf4j.Logger;
 
 /**
- * A function with logging example.
+ * A function that demonstrates how to redirect logging to a topic.
+ * In this particular example, for every input string, the function
+ * does some logging. If --logTopic topic is specified, these log statements
+ * end up in that specified pulsar topic
  */
 public class LoggingFunction implements Function<String, String> {
 
-    private final AtomicInteger counter = new AtomicInteger(0);
-
     @Override
     public String process(String input, Context context) {
-        Logger LOG = context.getLogger();
-
-        int counterLocal = counter.incrementAndGet();
-        if ((counterLocal & Integer.MAX_VALUE) % 100000 == 0) {
-            LOG.info("Handled {} messages", counterLocal);
-        }
-
+        context.getLogger().info(input + "-log");
         return String.format("%s!", input);
     }
 
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/PublishFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/PublishFunction.java
index e97b692f9d..02d461636c 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/PublishFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/PublishFunction.java
@@ -22,12 +22,16 @@
 import org.apache.pulsar.functions.api.Function;
 import org.apache.pulsar.functions.api.utils.DefaultSerDe;
 
+/**
+ * Example function that uses the built in publish function in the context
+ * to publish to a desired topic based on config
+ */
 public class PublishFunction implements Function<String, Void> {
     @Override
     public Void process(String input, Context context) {
-        String publishTopic = (String) 
context.getUserConfigValueOrDefault("publish-topic", 
"persistent://sample/standalone/ns1/publish");
+        String publishTopic = (String) 
context.getUserConfigValueOrDefault("publish-topic", "publishtopic");
         String output = String.format("%s!", input);
-        context.publish(publishTopic, output, DefaultSerDe.class.getName());
+        context.publish(publishTopic, output);
         return null;
     }
 }
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/UserMetricFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/UserMetricFunction.java
index e23d37f9af..c81cadbfa2 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/UserMetricFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/UserMetricFunction.java
@@ -21,10 +21,14 @@
 import org.apache.pulsar.functions.api.Context;
 import org.apache.pulsar.functions.api.Function;
 
+/**
+ * Example function that wants to keep track of the rate of letters
+ * seen in input.
+ */
 public class UserMetricFunction implements Function<String, Void> {
     @Override
     public Void process(String input, Context context) {
-        context.recordMetric("MyMetricName", 1);
+        context.recordMetric("LetterCount", input.length());
         return null;
     }
 }
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/VoidFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/VoidFunction.java
index abcc663320..4f7f5af98d 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/VoidFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/VoidFunction.java
@@ -21,6 +21,9 @@
 import org.apache.pulsar.functions.api.Context;
 import org.apache.pulsar.functions.api.Function;
 
+/**
+ * Example function that does not return any value
+ */
 public class VoidFunction implements Function<String, Void> {
     @Override
     public Void process(String input, Context context) {
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/WindowFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/WindowFunction.java
index 189b2ca103..ae01cecad4 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/WindowFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/WindowFunction.java
@@ -21,20 +21,15 @@
 import lombok.extern.slf4j.Slf4j;
 
 import java.util.Collection;
-import java.util.function.BinaryOperator;
 import java.util.function.Function;
 
+/**
+ * Example Function that acts on a window of tuples at a time rather than per 
tuple basis.
+ */
 @Slf4j
 public class WindowFunction implements Function <Collection<Integer>, Integer> 
{
     @Override
     public Integer apply(Collection<Integer> integers) {
-
-        int sum = integers.stream().reduce(new BinaryOperator<Integer>() {
-            @Override
-            public Integer apply(Integer integer, Integer integer2) {
-                return integer + integer2;
-            }
-        }).get();
-        return sum;
+        return integers.stream().reduce(0, (x, y) -> x + y);
     }
 }
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/CounterFunction.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/WordCountFunction.java
similarity index 78%
rename from 
pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/CounterFunction.java
rename to 
pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/WordCountFunction.java
index 9bc25db923..d9e6747ab9 100644
--- 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/CounterFunction.java
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/WordCountFunction.java
@@ -23,11 +23,16 @@
 
 import java.util.Arrays;
 
-public class CounterFunction implements Function<String, Void> {
+/**
+ * The classic word count example done using pulsar functions
+ * Each input message is a sentence that split into words and each word 
counted.
+ * The built in counter state is used to keep track of the word count in a
+ * persistent and consistent manner.
+ */
+public class WordCountFunction implements Function<String, Void> {
     @Override
     public Void process(String input, Context context) throws Exception {
         Arrays.asList(input.split("\\.")).forEach(word -> 
context.incrCounter(word, 1));
-
         return null;
     }
 }
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/serde/CustomObject.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/serde/CustomObject.java
new file mode 100644
index 0000000000..777bbdcb4b
--- /dev/null
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/serde/CustomObject.java
@@ -0,0 +1,33 @@
+/**
+ * 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.pulsar.functions.api.examples.serde;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * This class simulates a user defined POJO
+ */
+@Getter
+@Setter
+@AllArgsConstructor
+public class CustomObject {
+    private long value;
+}
diff --git 
a/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/serde/CustomObjectSerde.java
 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/serde/CustomObjectSerde.java
new file mode 100644
index 0000000000..fd5bcdccf6
--- /dev/null
+++ 
b/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/serde/CustomObjectSerde.java
@@ -0,0 +1,41 @@
+/**
+ * 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.pulsar.functions.api.examples.serde;
+
+import org.apache.pulsar.functions.api.SerDe;
+
+import java.nio.ByteBuffer;
+
+/**
+ * This class takes care of serializing/deserializing CustomObject
+ */
+public class CustomObjectSerde implements SerDe<CustomObject> {
+    @Override
+    public CustomObject deserialize(byte[] bytes) {
+        ByteBuffer buffer =  ByteBuffer.wrap(bytes);
+        return new CustomObject(buffer.getLong());
+    }
+
+    @Override
+    public byte[] serialize(CustomObject object) {
+        ByteBuffer buffer = ByteBuffer.allocate(8);
+        buffer.putLong(object.getValue());
+        return buffer.array();
+    }
+}
diff --git 
a/pulsar-functions/java-examples/src/main/resources/example-stateful-function-config.yaml
 
b/pulsar-functions/java-examples/src/main/resources/example-stateful-function-config.yaml
index 4c758c9ddd..605b6b0dcb 100644
--- 
a/pulsar-functions/java-examples/src/main/resources/example-stateful-function-config.yaml
+++ 
b/pulsar-functions/java-examples/src/main/resources/example-stateful-function-config.yaml
@@ -20,7 +20,7 @@
 tenant: "test"
 namespace: "test-namespace"
 name: "stateful-example"
-className: "org.apache.pulsar.functions.api.examples.CounterFunction"
+className: "org.apache.pulsar.functions.api.examples.WordCountFunction"
 inputs: ["test_stateful_src"]
 userConfig:
   "PublishTopic": "test_stateful_result"
diff --git a/pulsar-functions/python-examples/config_based_append_function.py 
b/pulsar-functions/python-examples/config_based_append_function.py
new file mode 100755
index 0000000000..34597368de
--- /dev/null
+++ b/pulsar-functions/python-examples/config_based_append_function.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+#
+# 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.
+#
+
+
+from pulsar import Function
+
+# Function that appends something to incoming input based on config supplied
+class ConfigBasedAppendFunction(Function):
+  def __init__(self):
+    pass
+
+  def process(self, input, context):
+    key = "config-key"
+    append_value = "!"
+    if key in context.get_user_config_map:
+      append_value = context.get_user_config_value(append_value)
+    return input + append_value
diff --git a/pulsar-functions/python-examples/custom_object_function.py 
b/pulsar-functions/python-examples/custom_object_function.py
new file mode 100755
index 0000000000..53ba597445
--- /dev/null
+++ b/pulsar-functions/python-examples/custom_object_function.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+#
+# 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.
+#
+
+
+from pulsar import Function, SerDe
+
+class MyObject(object):
+  def __init__(self):
+    self.a = 0
+    self.b = 0
+
+class CustomSerDe(SerDe):
+  def __init__(self):
+    pass
+
+  def serialize(self, object):
+    return "%d,%d" % (object.a, object.b)
+
+  def deserialize(self, input_bytes):
+    split = str(input_bytes).split(',')
+    retval = MyObject()
+    retval.a = int(split[0])
+    retval.b = int(split[1])
+    return retval
+
+# Function that deals with custom objects
+class CustomObjectFunction(Function):
+  def __init__(self):
+    pass
+
+  def process(self, input, context):
+    retval = MyObject()
+    retval.a = input.a + 11
+    retval.b = input.b + 24
+    return retval
\ No newline at end of file
diff --git a/pulsar-functions/python-examples/logfunction.py 
b/pulsar-functions/python-examples/exclamation_function.py
similarity index 88%
rename from pulsar-functions/python-examples/logfunction.py
rename to pulsar-functions/python-examples/exclamation_function.py
index 504cdc5215..5df5de55b5 100755
--- a/pulsar-functions/python-examples/logfunction.py
+++ b/pulsar-functions/python-examples/exclamation_function.py
@@ -21,10 +21,11 @@
 
 from pulsar import Function
 
-class LogFunction(Function):
+# The classic ExclamationFunction that appends an exclamation at the end
+# of the input
+class ExclamationFunction(Function):
   def __init__(self):
     pass
 
   def process(self, input, context):
-    context.get_logger().info(input)
     return input + '!'
diff --git a/pulsar-functions/python-examples/logging_function.py 
b/pulsar-functions/python-examples/logging_function.py
new file mode 100755
index 0000000000..54f247389e
--- /dev/null
+++ b/pulsar-functions/python-examples/logging_function.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+#
+# 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.
+#
+
+
+from pulsar import Function
+
+# A function that demonstrates how to redirect logging to a topic.
+# In this particular example, for every input string, the function
+# does some logging. If --logTopic topic is specified, these log
+# statements end up in that specified pulsar topic
+class LoggingFunction(Function):
+  def __init__(self):
+    pass
+
+  def process(self, input, context):
+    context.get_logger().info(input + '-log')
+    return input + '!'
diff --git 
a/pulsar-functions/python-examples/pure_python_function_exclamation.py 
b/pulsar-functions/python-examples/native_exclamation_function.py
similarity index 100%
rename from pulsar-functions/python-examples/pure_python_function_exclamation.py
rename to pulsar-functions/python-examples/native_exclamation_function.py
diff --git a/pulsar-functions/python-examples/publish_function.py 
b/pulsar-functions/python-examples/publish_function.py
new file mode 100755
index 0000000000..c0c3c91f6a
--- /dev/null
+++ b/pulsar-functions/python-examples/publish_function.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+#
+# 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.
+#
+
+
+from pulsar import Function
+
+# Example function that uses the built in publish function in the context
+# to publish to a desired topic based on config
+class PublishFunction(Function):
+  def __init__(self):
+    pass
+
+  def process(self, input, context):
+    publish_topic = "publishtopic"
+    if "publish-topic" in context.get_user_config_map:
+      publish_topic = context.get_user_config_value("publish-topic")
+    context.publish(publish_topic, input + '!')
+    return
diff --git a/pulsar-functions/python-examples/exclamation.py 
b/pulsar-functions/python-examples/void_function.py
similarity index 90%
rename from pulsar-functions/python-examples/exclamation.py
rename to pulsar-functions/python-examples/void_function.py
index d8a14f76f5..afa44df820 100755
--- a/pulsar-functions/python-examples/exclamation.py
+++ b/pulsar-functions/python-examples/void_function.py
@@ -21,9 +21,10 @@
 
 from pulsar import Function
 
-class Exclamation(Function):
+# Example function that does not return any value
+class VoidFunction(Function):
   def __init__(self):
     pass
 
   def process(self, input, context):
-    return input + '!'
+    return
diff --git 
a/tests/integration/semantics/src/test/java/org/apache/pulsar/tests/integration/functions/PulsarFunctionsTestBase.java
 
b/tests/integration/semantics/src/test/java/org/apache/pulsar/tests/integration/functions/PulsarFunctionsTestBase.java
index af767d9b22..180e7f9375 100644
--- 
a/tests/integration/semantics/src/test/java/org/apache/pulsar/tests/integration/functions/PulsarFunctionsTestBase.java
+++ 
b/tests/integration/semantics/src/test/java/org/apache/pulsar/tests/integration/functions/PulsarFunctionsTestBase.java
@@ -36,9 +36,9 @@
         "org.apache.pulsar.functions.api.examples.ExclamationFunction";
 
     public static final String EXCLAMATION_PYTHON_CLASS =
-        "exclamation.Exclamation";
+        "exclamation.ExclamationFunction";
 
-    public static final String EXCLAMATION_PYTHON_FILE = "exclamation.py";
+    public static final String EXCLAMATION_PYTHON_FILE = 
"exclamation_function.py";
 
     protected static String getExclamationClass(Runtime runtime) {
         if (Runtime.JAVA == runtime) {


 

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