[GitHub] [carbondata] jackylk commented on a change in pull request #3421: [CARBONDATA-3557] Support write Flink streaming data to Carbon

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jackylk commented on a change in pull request #3421: [CARBONDATA-3557] Support write Flink streaming data to Carbon
URL: https://github.com/apache/carbondata/pull/3421#discussion_r339386116
 
 

 ##########
 File path: integration/flink/src/main/java/org/apache/carbon/core/metadata/SegmentManager.java
 ##########
 @@ -0,0 +1,127 @@
+/*
+ * 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.carbon.core.metadata;
+
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datamap.Segment;
+import org.apache.carbondata.core.datastore.filesystem.CarbonFile;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+import org.apache.carbondata.core.metadata.SegmentFileStore;
+import org.apache.carbondata.core.metadata.schema.table.CarbonTable;
+import org.apache.carbondata.core.mutate.CarbonUpdateUtil;
+import org.apache.carbondata.core.statusmanager.FileFormat;
+import org.apache.carbondata.core.statusmanager.LoadMetadataDetails;
+import org.apache.carbondata.core.statusmanager.SegmentStatus;
+import org.apache.carbondata.core.statusmanager.SegmentStatusManager;
+import org.apache.carbondata.core.util.CarbonUtil;
+import org.apache.carbondata.core.util.path.CarbonTablePath;
+import org.apache.carbondata.processing.util.CarbonLoaderUtil;
+import org.apache.log4j.Logger;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.UUID;
+
+public final class SegmentManager {
+
+    private static final Logger LOGGER = LogServiceFactory.getLogService(SegmentManager.class.getName());
+
+    public static CarbonFile createSegmentFile(final CarbonTable table, final Map<String, String> options) throws IOException {
+        if (options == null) {
+            throw new IllegalArgumentException("Argument [options] is null.");
+        }
+        final String segmentPath = options.get("path");
+        if (segmentPath == null) {
+            throw new IllegalArgumentException("Option[path] is not set.");
+        }
+        if (!table.getTableInfo().isTransactionalTable()) {
+            throw new IllegalArgumentException("Unsupported operation on non-transactional table.");
+        }
+        final LoadMetadataDetails loadMetadataDetails = new LoadMetadataDetails();
+        final String loadMetadataDetailsFileName = UUID.randomUUID().toString().replace("-", "");
+        CarbonLoaderUtil.populateNewLoadMetaEntry(
+                loadMetadataDetails,
+                SegmentStatus.INSERT_IN_PROGRESS,
+                CarbonUpdateUtil.readCurrentTime(),
+                false
+        );
+        String format = options.get("format");
+        if (format == null) {
+            format = "carbondata";
+        }
+        if (!(format.equals("carbondata") || format.equals("carbon"))) {
+            loadMetadataDetails.setFileFormat(new FileFormat(format));
+        }
+        final String segmentIdentifier = "";
+        final Segment segment = new Segment(
+                segmentIdentifier,
+                SegmentFileStore.genSegmentFileName(
+                        segmentIdentifier,
+                        loadMetadataDetailsFileName
+                ) + CarbonTablePath.SEGMENT_EXT,
+                segmentPath,
+                options
+        );
+        if (SegmentFileStore.writeSegmentFile(table, segment)) {
+            return createLoadMetadataDetails(
+                    table,
+                    loadMetadataDetails,
+                    loadMetadataDetailsFileName,
+                    segment.getSegmentFileName(),
+                    segmentPath
+            );
+        } else {
+            // TODO
+            throw new IOException("Adding segment with path failed.");
+        }
+    }
+
+    public static void deleteSegmentFileQuietly(final CarbonFile segmentFile) {
 
 Review comment:
   add comment for public segment

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