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https://issues.apache.org/jira/browse/APEXMALHAR-2011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15216356#comment-15216356
]
ASF GitHub Bot commented on APEXMALHAR-2011:
--------------------------------------------
Github user chinmaykolhatkar commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/211#discussion_r57761599
--- Diff:
contrib/src/main/java/com/datatorrent/contrib/avro/AvroFileInputOperator.java
---
@@ -0,0 +1,159 @@
+/**
+ * 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 com.datatorrent.contrib.avro;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.avro.AvroRuntimeException;
+import org.apache.avro.file.DataFileStream;
+import org.apache.avro.generic.GenericDatumReader;
+import org.apache.avro.generic.GenericRecord;
+import org.apache.avro.io.DatumReader;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.fs.Path;
+
+import com.datatorrent.api.AutoMetric;
+import com.datatorrent.api.DefaultOutputPort;
+import com.datatorrent.api.annotation.OutputPortFieldAnnotation;
+import com.datatorrent.lib.io.fs.AbstractFileInputOperator;
+
+/**
+ * <p>
+ * Avro File Input Operator
+ * </p>
+ * A specific implementation of the AbstractFileInputOperator to read Avro
+ * container files.<br>
+ * No need to provide schema,its inferred from the file<br>
+ * Users can add the {@link
IdempotentStorageManager.FSIdempotentStorageManager}
+ * to ensure exactly once semantics with a HDFS backed WAL.
+ *
+ * @displayName AvroFileInputOperator
+ * @category Input
+ * @tags fs, file,avro, input operator
+ * @since 3.3.0
+ */
[email protected]
+public class AvroFileInputOperator extends
AbstractFileInputOperator<GenericRecord>
+{
+
+ private transient long offset = 0L;
+
+ @AutoMetric
+ int recordCnt = 0;
+
+ @AutoMetric
+ int errorCnt = 0;
+
+ private transient DataFileStream<GenericRecord> avroDataStream;
+ private transient GenericRecord record = null;
+
+ public final transient DefaultOutputPort<GenericRecord> output = new
DefaultOutputPort<GenericRecord>();
+
+ @OutputPortFieldAnnotation(optional = true)
+ public final transient DefaultOutputPort<String> completedFilesPort =
new DefaultOutputPort<String>();
+
+ @OutputPortFieldAnnotation(optional = true)
--- End diff --
No need to set output port as optional... Its optional by default.
> POJO to Avro record converter
> -----------------------------
>
> Key: APEXMALHAR-2011
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2011
> Project: Apache Apex Malhar
> Issue Type: New Feature
> Reporter: devendra tagare
>
> We are looking to develop a record converter which would take a POJO as an
> input and emit a Generic record as the output based on the given Avro schema.
> The expected inputs for this operator would be,
> 1.Class Name of the incoming POJO
> 2.Avro schema for the Generic Record to emit.
> This operator would receive an Object on its input port and emit a Generic
> record on the output port.
> To start with, we would handle primitive types and then go on to handle
> complex types.
> Thanks,
> Dev
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