Github user eowhadi commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/422#discussion_r59946858
--- Diff:
core/sqf/src/seatrans/hbase-trx/src/main/java/org/apache/hadoop/hbase/client/ClientScanner98.java.tmpl
---
@@ -0,0 +1,490 @@
+/**
+ * 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.hadoop.hbase.client;
+
+import java.io.IOException;
+import java.util.LinkedList;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.Cell;
+import org.apache.hadoop.hbase.DoNotRetryIOException;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.HRegionInfo;
+import org.apache.hadoop.hbase.KeyValueUtil;
+import org.apache.hadoop.hbase.NotServingRegionException;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.UnknownScannerException;
+import org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
+import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.protobuf.generated.MapReduceProtos;
+import org.apache.hadoop.hbase.regionserver.RegionServerStoppedException;
+import org.apache.hadoop.hbase.util.Bytes;
+
+/**
+ * Implements the scanner interface for the HBase client.
+ * If there are multiple regions in a table, this scanner will iterate
+ * through them all.
+ */
[email protected]
[email protected]
+public class ClientScanner98 extends AbstractClientScanner {
+ private final Log LOG = LogFactory.getLog(this.getClass());
+ protected Scan scan;
+ protected boolean closed = false;
+ // Current region scanner is against. Gets cleared if current region
goes
+ // wonky: e.g. if it splits on us.
+ protected HRegionInfo currentRegion = null;
+ protected ScannerCallable callable = null;
+ protected final LinkedList<Result> cache = new LinkedList<Result>();
+ protected final int caching;
+ protected long lastNext;
+ // Keep lastResult returned successfully in case we have to reset
scanner.
+ protected Result lastResult = null;
--- End diff --
the whole clientScanner98 will be de-referenced, to GC will get rid of
lastResult as it is a member of Clientscanner98. This code is quazi copy past
from existing client scanner code. So would like to minimize changes to strick
minimum (make sure it does compile with newer hbase version...)
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