1 files changed, 90 insertions, 0 deletions
diff --git a/dcae-analytics-cdap-plugins/src/main/java/org/onap/dcae/apod/analytics/cdap/plugins/batch/sink/dmaap/DMaaPMRSink.java b/dcae-analytics-cdap-plugins/src/main/java/org/onap/dcae/apod/analytics/cdap/plugins/batch/sink/dmaap/DMaaPMRSink.java
new file mode 100644
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+++ b/dcae-analytics-cdap-plugins/src/main/java/org/onap/dcae/apod/analytics/cdap/plugins/batch/sink/dmaap/DMaaPMRSink.java
@@ -0,0 +1,90 @@
+/*
+ * ===============================LICENSE_START======================================
+ *  dcae-analytics
+ * ================================================================================
+ *    Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ *  Licensed 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.
+ *  ============================LICENSE_END===========================================
+ */
+
+package org.onap.dcae.apod.analytics.cdap.plugins.batch.sink.dmaap;
+
+import co.cask.cdap.api.annotation.Description;
+import co.cask.cdap.api.annotation.Name;
+import co.cask.cdap.api.annotation.Plugin;
+import co.cask.cdap.api.data.batch.Output;
+import co.cask.cdap.api.data.format.StructuredRecord;
+import co.cask.cdap.api.data.schema.Schema;
+import co.cask.cdap.api.dataset.lib.KeyValue;
+import co.cask.cdap.etl.api.Emitter;
+import co.cask.cdap.etl.api.PipelineConfigurer;
+import co.cask.cdap.etl.api.batch.BatchSink;
+import co.cask.cdap.etl.api.batch.BatchSinkContext;
+import org.apache.hadoop.io.NullWritable;
+import org.onap.dcae.apod.analytics.cdap.common.utils.ValidationUtils;
+import org.onap.dcae.apod.analytics.cdap.plugins.domain.config.dmaap.DMaaPMRSinkPluginConfig;
+import org.onap.dcae.apod.analytics.cdap.plugins.utils.CDAPPluginUtils;
+import org.onap.dcae.apod.analytics.cdap.plugins.validator.DMaaPMRSinkPluginConfigValidator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * @author Rajiv Singla . Creation Date: 1/26/2017.
+ */
+@Plugin(type = BatchSink.PLUGIN_TYPE)
+@Name("DMaaPMRSink")
+@Description("A batch sink Plugin that publishes messages to DMaaP MR Topic.")
+public class DMaaPMRSink extends BatchSink<StructuredRecord, String, NullWritable> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRSink.class);
+
+    private final DMaaPMRSinkPluginConfig pluginConfig;
+
+    public DMaaPMRSink(final DMaaPMRSinkPluginConfig pluginConfig) {
+        LOG.debug("Creating DMaaP MR Sink Plugin with plugin Config: {}", pluginConfig);
+        this.pluginConfig = pluginConfig;
+    }
+
+    @Override
+    public void configurePipeline(final PipelineConfigurer pipelineConfigurer) {
+        super.configurePipeline(pipelineConfigurer);
+        ValidationUtils.validateSettings(pluginConfig, new DMaaPMRSinkPluginConfigValidator());
+        // validates that input schema contains the field provided in Sink Message Column Name property
+        final Schema inputSchema = pipelineConfigurer.getStageConfigurer().getInputSchema();
+        CDAPPluginUtils.validateSchemaContainsFields(inputSchema, pluginConfig.getMessageColumnName());
+    }
+
+
+    @Override
+    public void prepareRun(BatchSinkContext context) throws Exception {
+        context.addOutput(Output.of(pluginConfig.getReferenceName(), new DMaaPMROutputFormatProvider(pluginConfig)));
+    }
+
+    @Override
+    public void transform(StructuredRecord structuredRecord,
+                          Emitter<KeyValue<String, NullWritable>> emitter) throws Exception {
+        // get incoming message from structured record
+        final String incomingMessage = structuredRecord.get(pluginConfig.getMessageColumnName());
+
+        // if incoming messages does not have message column name log warning as it should not happen
+        if (incomingMessage == null) {
+            LOG.warn("Column Name: {}, contains no message.Skipped for DMaaP MR Publishing....",
+                    pluginConfig.getMessageColumnName());
+        } else {
+
+            // emit the messages as key
+            emitter.emit(new KeyValue<String, NullWritable>(incomingMessage, null));
+        }
+    }
+}