1 files changed, 117 insertions, 0 deletions
diff --git a/src/main/java/parallelai/spyglass/hbase/HBaseTapCollector.java b/src/main/java/parallelai/spyglass/hbase/HBaseTapCollector.java
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+++ b/src/main/java/parallelai/spyglass/hbase/HBaseTapCollector.java
@@ -0,0 +1,117 @@
+/**
+ * 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 parallelai.spyglass.hbase;
+
+import cascading.flow.FlowProcess;
+import cascading.flow.hadoop.HadoopFlowProcess;
+import cascading.tap.Tap;
+import cascading.tap.TapException;
+import cascading.tuple.TupleEntrySchemeCollector;
+import org.apache.hadoop.mapred.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+/**
+ * Class HBaseTapCollector is a kind of
+ * {@link cascading.tuple.TupleEntrySchemeCollector} that writes tuples to the
+ * resource managed by a particular {@link HBaseTap} instance.
+ */
+public class HBaseTapCollector extends TupleEntrySchemeCollector implements OutputCollector {
+  /** Field LOG */
+  private static final Logger LOG = LoggerFactory.getLogger(HBaseTapCollector.class);
+  /** Field conf */
+  private final JobConf conf;
+  /** Field writer */
+  private RecordWriter writer;
+  /** Field flowProcess */
+  private final FlowProcess<JobConf> hadoopFlowProcess;
+  /** Field tap */
+  private final Tap<JobConf, RecordReader, OutputCollector> tap;
+  /** Field reporter */
+  private final Reporter reporter = Reporter.NULL;
+
+  /**
+   * Constructor TapCollector creates a new TapCollector instance.
+   * 
+   * @param flowProcess
+   * @param tap
+   *          of type Tap
+   * @throws IOException
+   *           when fails to initialize
+   */
+  public HBaseTapCollector(FlowProcess<JobConf> flowProcess, Tap<JobConf, RecordReader, OutputCollector> tap) throws IOException {
+    super(flowProcess, tap.getScheme());
+    this.hadoopFlowProcess = flowProcess;
+    this.tap = tap;
+    this.conf = new JobConf(flowProcess.getConfigCopy());
+    this.setOutput(this);
+  }
+
+  @Override
+  public void prepare() {
+    try {
+      initialize();
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+
+    super.prepare();
+  }
+
+  private void initialize() throws IOException {
+    tap.sinkConfInit(hadoopFlowProcess, conf);
+    OutputFormat outputFormat = conf.getOutputFormat();
+    LOG.info("Output format class is: " + outputFormat.getClass().toString());
+    writer = outputFormat.getRecordWriter(null, conf, tap.getIdentifier(), Reporter.NULL);
+    sinkCall.setOutput(this);
+  }
+
+  @Override
+  public void close() {
+    try {
+      LOG.info("closing tap collector for: {}", tap);
+      writer.close(reporter);
+    } catch (IOException exception) {
+      LOG.warn("exception closing: {}", exception);
+      throw new TapException("exception closing HBaseTapCollector", exception);
+    } finally {
+      super.close();
+    }
+  }
+
+  /**
+   * Method collect writes the given values to the {@link Tap} this instance
+   * encapsulates.
+   * 
+   * @param writableComparable
+   *          of type WritableComparable
+   * @param writable
+   *          of type Writable
+   * @throws IOException
+   *           when
+   */
+  public void collect(Object writableComparable, Object writable) throws IOException {
+    if (hadoopFlowProcess instanceof HadoopFlowProcess)
+      ((HadoopFlowProcess) hadoopFlowProcess).getReporter().progress();
+
+    writer.write(writableComparable, writable);
+  }
+}