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https://issues.apache.org/jira/browse/FLINK-2168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15848010#comment-15848010
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ASF GitHub Bot commented on FLINK-2168:
---------------------------------------
Github user ramkrish86 commented on a diff in the pull request:
https://github.com/apache/flink/pull/3149#discussion_r98828506
--- Diff:
flink-connectors/flink-hbase/src/main/java/org/apache/flink/addons/hbase/HBaseTableSourceInputFormat.java
---
@@ -0,0 +1,144 @@
+/*
+ * 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.flink.addons.hbase;
+
+import org.apache.flink.api.common.io.InputFormat;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.java.typeutils.ResultTypeQueryable;
+import org.apache.flink.api.java.typeutils.RowTypeInfo;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.types.Row;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.TableNotFoundException;
+import org.apache.hadoop.hbase.client.HTable;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.ConnectionFactory;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.Scan;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * {@link InputFormat} subclass that wraps the access for HTables. Returns
the result as {@link Row}
+ */
+public class HBaseTableSourceInputFormat extends TableInputFormat<Row>
implements ResultTypeQueryable<Row> {
+
+ private static final long serialVersionUID = 1L;
+
+ private static final Logger LOG =
LoggerFactory.getLogger(HBaseTableSourceInputFormat.class);
+ private String tableName;
+ private transient Connection conn;
+ private transient org.apache.hadoop.conf.Configuration conf;
+ private HBaseTableSchema schema;
+
+ public HBaseTableSourceInputFormat(org.apache.hadoop.conf.Configuration
conf, String tableName, HBaseTableSchema schema) {
+ this.tableName = tableName;
+ this.conf = conf;
+ this.schema = schema;
+ }
+
+ @Override
+ public void configure(Configuration parameters) {
+ LOG.info("Initializing HBaseConfiguration");
+ connectToTable();
+ if(table != null) {
+ scan = getScanner();
+ }
+ }
+
+ @Override
+ protected Scan getScanner() {
+ Scan scan = new Scan();
+ for(String family : schema.getFamilyNames()) {
--- End diff --
Actually in hbse every thing is lexographically sorted (with byte[]). But
here since we represent using String the map that we use in HBaseTableSchema
should be sorting this in the natural order.
But the results that we retrieve will always be lexographically sorted and
we try to retrieve the specific cell from the result using this
> res.getValue(Bytes.toBytes(family), Bytes.toBytes(qualifier));
> Add HBaseTableSource
> --------------------
>
> Key: FLINK-2168
> URL: https://issues.apache.org/jira/browse/FLINK-2168
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Affects Versions: 0.9
> Reporter: Fabian Hueske
> Assignee: ramkrishna.s.vasudevan
> Priority: Minor
> Labels: starter
>
> Add a {{HBaseTableSource}} to read data from a HBase table. The
> {{HBaseTableSource}} should implement the {{ProjectableTableSource}}
> (FLINK-3848) and {{FilterableTableSource}} (FLINK-3849) interfaces.
> The implementation can be based on Flink's {{TableInputFormat}}.
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