NIFI-559: Initial implementation of DuplicateFlowFile

nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/DuplicateFlowFile.java

@@ -0,0 +1,81 @@
+/*
+ * 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.nifi.processors.standard;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.nifi.annotation.behavior.EventDriven;
+import org.apache.nifi.annotation.behavior.SupportsBatching;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.processor.AbstractProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.ProcessException;
+import org.apache.nifi.processor.util.StandardValidators;
+
+@EventDriven
+@SupportsBatching
+@Tags({"test", "load", "duplicate"})
+@CapabilityDescription("Intended for load testing, this processor will create the configured number of copies of each incoming FlowFile")
+public class DuplicateFlowFile extends AbstractProcessor {
+
+    static final PropertyDescriptor NUM_COPIES = new PropertyDescriptor.Builder()
+    .name("Number of Copies")
+    .description("Specifies how many copies of each incoming FlowFile will be made")
+    .required(true)
+    .expressionLanguageSupported(false)
+    .defaultValue("100")
+    .addValidator(StandardValidators.NON_NEGATIVE_INTEGER_VALIDATOR)
+    .build();
+
+    static final Relationship REL_SUCCESS = new Relationship.Builder()
+    .name("success")
+    .description("The original FlowFile and all copies will be sent to this relationship")
+    .build();
+
+    @Override
+    public Set<Relationship> getRelationships() {
+        return Collections.singleton(REL_SUCCESS);
+    }
+
+    @Override
+    protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
+        return Collections.singletonList(NUM_COPIES);
+    }
+
+    @Override
+    public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {
+        final FlowFile flowFile = session.get();
+        if (flowFile == null) {
+            return;
+        }
+
+        for (int i=0; i < context.getProperty(NUM_COPIES).asInteger(); i++) {
+            final FlowFile copy = session.clone(flowFile);
+            session.transfer(copy, REL_SUCCESS);
+        }
+
+        session.transfer(flowFile, REL_SUCCESS);
+    }
+
+}

nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/resources/META-INF/services/org.apache.nifi.processor.Processor

@@ -18,6 +18,7 @@ org.apache.nifi.processors.standard.ControlRate
 org.apache.nifi.processors.standard.ConvertCharacterSet
 org.apache.nifi.processors.standard.DetectDuplicate
 org.apache.nifi.processors.standard.DistributeLoad
+org.apache.nifi.processors.standard.DuplicateFlowFile
 org.apache.nifi.processors.standard.EncryptContent
 org.apache.nifi.processors.standard.EvaluateJsonPath
 org.apache.nifi.processors.standard.EvaluateRegularExpression

nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/test/java/org/apache/nifi/processors/standard/TestDuplicateFlowFile.java

@@ -0,0 +1,36 @@
+/*
+ * 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.nifi.processors.standard;
+
+import org.apache.nifi.util.TestRunner;
+import org.apache.nifi.util.TestRunners;
+import org.junit.Test;
+
+public class TestDuplicateFlowFile {
+
+    @Test
+    public void test() {
+        final TestRunner runner = TestRunners.newTestRunner(DuplicateFlowFile.class);
+        runner.setProperty(DuplicateFlowFile.NUM_COPIES, "100");
+
+        runner.enqueue("hello".getBytes());
+        runner.run();
+
+        runner.assertAllFlowFilesTransferred(DuplicateFlowFile.REL_SUCCESS, 101);
+    }
+
+}