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https://issues.apache.org/jira/browse/BEAM-7450?focusedWorklogId=259788&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-259788
]
ASF GitHub Bot logged work on BEAM-7450:
----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Jun/19 17:26
Start Date: 13/Jun/19 17:26
Worklog Time Spent: 10m
Work Description: jhalaria commented on pull request #8718: [BEAM-7450]
Add an unbounded HcatalogIO reader using splittable pardo
URL: https://github.com/apache/beam/pull/8718#discussion_r293492358
##########
File path:
sdks/java/io/hcatalog/src/main/java/org/apache/beam/sdk/io/hcatalog/HCatalogUtils.java
##########
@@ -0,0 +1,79 @@
+/*
+ * 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.beam.sdk.io.hcatalog;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import org.apache.beam.sdk.io.hcatalog.HCatalogIO.Read;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hive.conf.HiveConf;
+import org.apache.hadoop.hive.metastore.IMetaStoreClient;
+import org.apache.hadoop.hive.metastore.api.MetaException;
+import org.apache.hadoop.hive.ql.metadata.Partition;
+import org.apache.hadoop.hive.ql.metadata.Table;
+import org.apache.hadoop.hive.ql.stats.StatsUtils;
+import org.apache.hive.hcatalog.common.HCatUtil;
+
+/** Utility classes to enable meta store conf/client creation. */
+public class HCatalogUtils {
+
+ static IMetaStoreClient createMetaStoreClient(Configuration conf)
+ throws IOException, MetaException {
+ final HiveConf hiveConf = HCatUtil.getHiveConf(conf);
+ return HCatUtil.getHiveMetastoreClient(hiveConf);
+ }
+
+ static HiveConf createHiveConf(Read readRequest) throws IOException {
+ Configuration conf = new Configuration();
+ for (Map.Entry<String, String> entry :
readRequest.getConfigProperties().entrySet()) {
+ conf.set(entry.getKey(), entry.getValue());
+ }
+ return HCatUtil.getHiveConf(conf);
+ }
+
+ static int getSplitCount(Read readRequest) throws Exception {
+ int desiredSplitCount = 1;
+ long estimatedSizeBytes =
HCatalogUtils.getFileSizeForPartitions(readRequest);
+ if (estimatedSizeBytes > 0) {
+ desiredSplitCount = (int) Math.ceil((double) estimatedSizeBytes /
Integer.MAX_VALUE);
Review comment:
While reading a partition, we calculate the size of the partition, so that
we can set the value for HCatConstants.HCAT_DESIRED_PARTITION_NUM_SPLITS
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Issue Time Tracking
-------------------
Worklog Id: (was: 259788)
Time Spent: 7.5h (was: 7h 20m)
> Unbounded HCatalogIO Reader using splittable pardos
> ---------------------------------------------------
>
> Key: BEAM-7450
> URL: https://issues.apache.org/jira/browse/BEAM-7450
> Project: Beam
> Issue Type: New Feature
> Components: sdk-java-core
> Reporter: Ankit Jhalaria
> Assignee: Ankit Jhalaria
> Priority: Minor
> Time Spent: 7.5h
> Remaining Estimate: 0h
>
> # Current version of HcatalogIO is a bounded source.
> # While migrating our jobs to aws, we realized that it would be helpful to
> have an unbounded hcat reader that can behave as an unbounded source and
> polls for new partitions as and when they become available.
> # I have used splittable pardo(s) to do this. There is a flag that can be
> set to treat this as a bounded source which will terminate if that flag is
> set.
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