carp84 commented on a change in pull request #8930: [FLINK-12955] HBase LookupableTableSource URL: https://github.com/apache/flink/pull/8930#discussion_r298996609
########## File path: flink-connectors/flink-hbase/src/main/java/org/apache/flink/connectors/hbase/table/HBaseTableFactory.java ########## @@ -0,0 +1,146 @@ +/* + * 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.connectors.hbase.table; + +import org.apache.flink.addons.hbase.HBaseTableSource; +import org.apache.flink.table.api.TableSchema; +import org.apache.flink.table.descriptors.DescriptorProperties; +import org.apache.flink.table.factories.StreamTableSinkFactory; +import org.apache.flink.table.factories.StreamTableSourceFactory; +import org.apache.flink.table.sinks.StreamTableSink; +import org.apache.flink.table.sources.StreamTableSource; +import org.apache.flink.types.Row; +import org.apache.flink.util.Preconditions; + +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.HBaseConfiguration; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +import static org.apache.flink.connectors.hbase.table.HBaseValidator.COLUMNFAMILY_QUALIFIER_DELIMITER_PATTERN; +import static org.apache.flink.connectors.hbase.table.HBaseValidator.CONNECTOR_HBASE_CLIENT_PARAM_PREFIX; +import static org.apache.flink.connectors.hbase.table.HBaseValidator.CONNECTOR_HBASE_TABLE_NAME; +import static org.apache.flink.connectors.hbase.table.HBaseValidator.CONNECTOR_QUALIFIER_DELIMITER; +import static org.apache.flink.connectors.hbase.table.HBaseValidator.CONNECTOR_ROW_KEY; +import static org.apache.flink.connectors.hbase.table.HBaseValidator.CONNECTOR_TYPE_VALUE_HBASE; +import static org.apache.flink.connectors.hbase.table.HBaseValidator.CONNECTOR_VERSION_VALUE_143; +import static org.apache.flink.table.descriptors.ConnectorDescriptorValidator.CONNECTOR_PROPERTY_VERSION; +import static org.apache.flink.table.descriptors.ConnectorDescriptorValidator.CONNECTOR_TYPE; +import static org.apache.flink.table.descriptors.ConnectorDescriptorValidator.CONNECTOR_VERSION; +import static org.apache.flink.table.descriptors.Schema.SCHEMA; +import static org.apache.flink.table.descriptors.Schema.SCHEMA_NAME; +import static org.apache.flink.table.descriptors.Schema.SCHEMA_TYPE; + +/** + * Factory for creating configured instances of {@link HBaseTableSource} or sink. + */ +public class HBaseTableFactory implements StreamTableSourceFactory<Row>, StreamTableSinkFactory<Row> { + @Override + public StreamTableSink<Row> createStreamTableSink(Map<String, String> properties) { + //TODO NEED to wait FLINK-10206 + throw new UnsupportedOperationException("not support createStreamTableSink now."); + } + + @Override + public StreamTableSource<Row> createStreamTableSource(Map<String, String> properties) { + final DescriptorProperties descriptorProperties = getValidatedProperties(properties); + Configuration hbaseClientConf = createClientConfiguration(properties); + //TODO , now only for the first version, it's to hack to get the rowkey from TableSchema. + hackRowkey(descriptorProperties); + HBaseTableContext hBaseTableContext = HBaseTableContext.create(descriptorProperties, hbaseClientConf); + return new HBaseStreamTableSource(hBaseTableContext); + } + + /** + * now it's a hack. in the future, we will remove it. + */ + private void hackRowkey(DescriptorProperties descriptorProperties) { + TableSchema tableSchema = descriptorProperties.getTableSchema(SCHEMA); + String[] columnNames = tableSchema.getFieldNames(); + String delimiter = descriptorProperties.getOptionalString(CONNECTOR_QUALIFIER_DELIMITER).orElse( + COLUMNFAMILY_QUALIFIER_DELIMITER_PATTERN); + String rowkey = null; + int rowkeyCount = 0; + for (String column : columnNames) { + if (!column.contains(delimiter)) { + rowkey = column; + rowkeyCount++; + } + } + Preconditions.checkArgument(rowkeyCount == 1, + "a column which doesn't contain delimiter(" + delimiter + ") is regarded as rowkey, now only support 1 rowkey, but now has " + rowkeyCount); + descriptorProperties.putString(CONNECTOR_ROW_KEY, rowkey); + } + + private DescriptorProperties getValidatedProperties(Map<String, String> properties) { + final DescriptorProperties descriptorProperties = new DescriptorProperties(true); + descriptorProperties.putProperties(properties); + + new HBaseValidator().validate(descriptorProperties); + + return descriptorProperties; + } + + @Override + public Map<String, String> requiredContext() { + Map<String, String> context = new HashMap<>(); + context.put(CONNECTOR_TYPE, CONNECTOR_TYPE_VALUE_HBASE); // hbase + context.put(CONNECTOR_VERSION, hbaseVersion()); // version + context.put(CONNECTOR_PROPERTY_VERSION, "1"); // backwards compatibility + return context; + } + + @Override + public List<String> supportedProperties() { + List<String> properties = new ArrayList<>(); + + properties.add(CONNECTOR_HBASE_TABLE_NAME); + properties.add(CONNECTOR_QUALIFIER_DELIMITER); + properties.add(CONNECTOR_ROW_KEY); + + properties.add(SCHEMA + ".#." + SCHEMA_TYPE); + properties.add(SCHEMA + ".#." + SCHEMA_NAME); + + // HBase's param wildcard + properties.add(CONNECTOR_HBASE_CLIENT_PARAM_PREFIX); + + // TODO add more support + return properties; + } + + private Configuration createClientConfiguration(Map<String, String> userParams) { + // create default configuration from current runtime env (`hbase-site.xml` in classpath) first, + Configuration clientConfiguration = HBaseConfiguration.create(); + + // and append or overwrite configuration using user params from client-side which has highest priority + if (null != userParams) { + for (Map.Entry<String, String> entry : userParams.entrySet()) { + clientConfiguration.set(entry.getKey(), entry.getValue()); + } + } + return clientConfiguration; + } + + String hbaseVersion() { Review comment: Can be private method. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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